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Slepičková Kasálková N, Juřicová V, Fajstavr D, Frýdlová B, Rimpelová S, Švorčík V, Slepička P. Plasma-Activated Polydimethylsiloxane Microstructured Pattern with Collagen for Improved Myoblast Cell Guidance. Int J Mol Sci 2024; 25:2779. [PMID: 38474025 DOI: 10.3390/ijms25052779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 02/22/2024] [Accepted: 02/25/2024] [Indexed: 03/14/2024] Open
Abstract
We focused on polydimethylsiloxane (PDMS) as a substrate for replication, micropatterning, and construction of biologically active surfaces. The novelty of this study is based on the combination of the argon plasma exposure of a micropatterned PDMS scaffold, where the plasma served as a strong tool for subsequent grafting of collagen coatings and their application as cell growth scaffolds, where the standard was significantly exceeded. As part of the scaffold design, templates with a patterned microstructure of different dimensions (50 × 50, 50 × 20, and 30 × 30 μm2) were created by photolithography followed by pattern replication on a PDMS polymer substrate. Subsequently, the prepared microstructured PDMS replicas were coated with a type I collagen layer. The sample preparation was followed by the characterization of material surface properties using various analytical techniques, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). To evaluate the biocompatibility of the produced samples, we conducted studies on the interactions between selected polymer replicas and micro- and nanostructures and mammalian cells. Specifically, we utilized mouse myoblasts (C2C12), and our results demonstrate that we achieved excellent cell alignment in conjunction with the development of a cytocompatible surface. Consequently, the outcomes of this research contribute to an enhanced comprehension of surface properties and interactions between structured polymers and mammalian cells. The use of periodic microstructures has the potential to advance the creation of novel materials and scaffolds in tissue engineering. These materials exhibit exceptional biocompatibility and possess the capacity to promote cell adhesion and growth.
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Affiliation(s)
- Nikola Slepičková Kasálková
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Veronika Juřicová
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Dominik Fajstavr
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Bára Frýdlová
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Václav Švorčík
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Petr Slepička
- Department of Solid State Engineering, The University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
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2
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Oberdick SD, Dodd SJ, Koretsky AP, Zabow G. Shaped Magnetogel Microparticles for Multispectral Magnetic Resonance Contrast and Sensing. ACS Sens 2024; 9:42-51. [PMID: 38113475 DOI: 10.1021/acssensors.3c01373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Multispectral magnetic resonance imaging (MRI) contrast agents are microfabricated three-dimensional magnetic structures that encode nearby water protons with discrete frequencies. The agents have a unique radiofrequency (RF) resonance that can be tuned by engineering the geometric parameters of these microstructures. Multispectral contrast agents can be used as sensors by incorporating a stimulus-driven shape-changing response into their structure. These geometrically encoded magnetic sensors (GEMS) enable MRI-based sensing via environmentally induced changes to their geometry and their corresponding RF resonance. Previously, GEMS have been made using thin-film lithography techniques in a cleanroom environment. While these approaches offer precise control of the microstructure, they can be a limitation for researchers who do not have cleanroom access or microfabrication expertise. Here, an alternative approach for GEMS fabrication based on soft lithography is introduced. The fabrication scheme uses cheap, accessible materials and simple chemistry to produce shaped magnetic hydrogel microparticles with multispectral MRI contrast properties. The microparticles can be used as sensors by fabricating them out of shape-reconfigurable, "smart" hydrogels. The change in shape causes a corresponding shift in the resonance of the GEMS, producing an MRI-addressable readout of the microenvironment. Proof-of-principle experiments showing a multispectral response to pH change with cylindrical shell-shaped magnetogel GEMS are presented.
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Affiliation(s)
- Samuel D Oberdick
- Department of Physics, University of Colorado, Boulder, Colorado 80309, United States
- National Institute of Standards and Technology, Boulder, Colorado 80305, United States
| | - Stephen J Dodd
- Laboratory of Functional and Molecular Imaging, NINDS, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Alan P Koretsky
- Laboratory of Functional and Molecular Imaging, NINDS, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Gary Zabow
- National Institute of Standards and Technology, Boulder, Colorado 80305, United States
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3
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Qi X, Pérez LA, Alonso MI, Mihi A. High Q-Factor Plasmonic Surface Lattice Resonances in Colloidal Nanoparticle Arrays. ACS Appl Mater Interfaces 2024; 16:1259-1267. [PMID: 38011896 PMCID: PMC10788823 DOI: 10.1021/acsami.3c08617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/29/2023]
Abstract
Surface lattice resonances (SLRs) sustained by ordered metal arrays are characterized by their narrow spectral features, remarkable quality factors, and the ability to tune their spectral properties based on the periodicity of the array. However, the majority of these structures are fabricated using classical lithographic processes or require postannealing steps at high temperatures to enhance the quality of the metal. These limitations hinder the widespread utilization of these periodic metal arrays in various applications. In this work, we use the scalable technique of template-assisted assembly of metal colloids to produce plasmonic supercrystals over centimeter areas capable of sustaining SLRs with high Q factors reaching up to 270. Our approach obviates the need for any postprocessing, offering a streamlined and efficient fabrication route. Furthermore, our method enables extensive tunability across the entire visible and near-infrared spectral ranges, empowering the design of tailored plasmonic resonant structures for a wide range of applications.
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Affiliation(s)
| | | | - Maria Isabel Alonso
- Institute of Materials Science
of Barcelona, ICMAB-CSIC, Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
| | - Agustín Mihi
- Institute of Materials Science
of Barcelona, ICMAB-CSIC, Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
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4
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Dowling R, Narkowicz R, Lenz K, Oelschlägel A, Lindner J, Kostylev M. Resonance-Based Sensing of Magnetic Nanoparticles Using Microfluidic Devices with Ferromagnetic Antidot Nanostructures. Nanomaterials (Basel) 2023; 14:19. [PMID: 38202474 PMCID: PMC10780436 DOI: 10.3390/nano14010019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/26/2023] [Accepted: 12/13/2023] [Indexed: 01/12/2024]
Abstract
We demonstrated resonance-based detection of magnetic nanoparticles employing novel designs based upon planar (on-chip) microresonators that may serve as alternatives to conventional magnetoresistive magnetic nanoparticle detectors. We detected 130 nm sized magnetic nanoparticle clusters immobilized on sensor surfaces after flowing through PDMS microfluidic channels molded using a 3D printed mold. Two detection schemes were investigated: (i) indirect detection incorporating ferromagnetic antidot nanostructures within microresonators, and (ii) direct detection of nanoparticles without an antidot lattice. Using scheme (i), magnetic nanoparticles noticeably downshifted the resonance fields of an antidot nanostructure by up to 207 G. In a similar antidot device in which nanoparticles were introduced via droplets rather than a microfluidic channel, the largest shift was only 44 G with a sensitivity of 7.57 G/ng. This indicated that introduction of the nanoparticles via microfluidics results in stronger responses from the ferromagnetic resonances. The results for both devices demonstrated that ferromagnetic antidot nanostructures incorporated within planar microresonators can detect nanoparticles captured from dispersions. Using detection scheme (ii), without the antidot array, we observed a strong resonance within the nanoparticles. The resonance's strength suggests that direct detection is more sensitive to magnetic nanoparticles than indirect detection using a nanostructure, in addition to being much simpler.
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Affiliation(s)
- Reyne Dowling
- Department of Physics, The University of Western Australia, Crawley, WA 6009, Australia;
| | - Ryszard Narkowicz
- Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany; (R.N.); (K.L.); (J.L.)
| | - Kilian Lenz
- Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany; (R.N.); (K.L.); (J.L.)
| | - Antje Oelschlägel
- Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany; (R.N.); (K.L.); (J.L.)
| | - Jürgen Lindner
- Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany; (R.N.); (K.L.); (J.L.)
| | - Mikhail Kostylev
- Department of Physics, The University of Western Australia, Crawley, WA 6009, Australia;
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5
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Joo S, Han JY, Seo S, Kim JH. Patterning Techniques in Coplanar Micro/Nano Capacitive Sensors. Micromachines (Basel) 2023; 14:2034. [PMID: 38004891 PMCID: PMC10672816 DOI: 10.3390/mi14112034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/27/2023] [Accepted: 10/29/2023] [Indexed: 11/26/2023]
Abstract
Rapid technological advancements have led to increased demands for sensors. Hence, high performance suitable for next-generation technology is required. As sensing technology has numerous applications, various materials and patterning methods are used for sensor fabrication. This affects the characteristics and performance of sensors, and research centered specifically on these patterns is necessary for high integration and high performance of these devices. In this paper, we review the patterning techniques used in recently reported sensors, specifically the most widely used capacitive sensors, and their impact on sensor performance. Moreover, we introduce a method for increasing sensor performance through three-dimensional (3D) structures.
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Affiliation(s)
- Seokwon Joo
- Department of Chemical Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Jung Yeon Han
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea;
| | - Soonmin Seo
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea;
| | - Ju-Hyung Kim
- Department of Chemical Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
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6
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Shan S, Li J, Liu P, Li Q, Wang X, Li X. A Microlens Array Grating for Miniature Multi-Channel Spectrometers. Sensors (Basel) 2023; 23:8381. [PMID: 37896475 PMCID: PMC10610974 DOI: 10.3390/s23208381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/11/2023] [Accepted: 09/19/2023] [Indexed: 10/29/2023]
Abstract
Most existing multi-channel spectrometers are constructed by physically stacking single-channel spectrometers, resulting in their large size, high weight, and limited number of channels. Therefore, their miniaturization is urgently needed. In this paper, a microlens array grating is designed for miniature multi-channel spectrometers. A transmissive element integrating microlens arrays and gratings, the MLAG, enables simultaneous focusing and dispersion. Using soft lithography, the MLAG was fabricated with a deviation of less than 2.2%. The dimensions are 10 mm × 10 mm × 4 mm with over 2000 available units. The MLAG spectrometer operates in the 400-700 nm wavelength range with a resolution of 6 nm. Additionally, the designed MLAG multi-channel spectrometer is experimentally verified to have independently valid cells that can be used in multichannel spectrometers. The wavelength position repeatability deviation of each cell is about 0.5 nm, and the repeatability of displacement measurements by the chromatic confocal sensor with the designed MLAG multi-channel spectrometer is less than 0.5 μm.
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Affiliation(s)
- Shuonan Shan
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
| | - Jingwen Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
| | - Peiyuan Liu
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
| | - Qiaolin Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
| | - Xiaohao Wang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
| | - Xinghui Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (S.S.); (J.L.); (P.L.); (X.W.)
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
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7
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Gao S, Zhan T, Zhou W, Niu F, Min S, Xiao A, Xu B. Mold Embossing -Based Soft Lithography for Fabrication of Complex Non-rectangular Channels. ACS Appl Mater Interfaces 2023. [PMID: 37347208 DOI: 10.1021/acsami.3c01306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/23/2023]
Abstract
This paper demonstrates a simple, flexible, and controllable technique to fabricate complex non-rectangular microchannels through the mold (e.g., balls) embossing-based soft lithography method. The good ductility of aluminum foil ensures the complete replication of the ball morphology, resulting in creation of the microchannels with a perfect circular cross section. By investigating the fabrication parameters such as the gap size and ball diameter, we can precisely control the width and height of the circular microchannel. More importantly, the method can be extended to create more complex channels with a series of cross-sectional shapes or combined channels through replacing the balls to the molds with various cross sections. Finally, the complex non-rectangular channels were designed and utilized to construct microfluidic valves and improve the mixing results of two liquids.
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Affiliation(s)
- Song Gao
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
| | - Tonghuan Zhan
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
| | - Wei Zhou
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
| | - Fuzhou Niu
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
| | - Shuqiang Min
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
| | - Aijun Xiao
- Hengtong New Energy Electrical Technology Co., Ltd., Suzhou 215234, China
| | - Bing Xu
- School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, China
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8
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Kudryavtseva V, Otero M, Zhang J, Bukatin A, Gould D, Sukhorukov GB. Drug-Eluting Sandwich Hydrogel Lenses Based on Microchamber Film Drug Encapsulation. ACS Nanosci Au 2023; 3:256-265. [PMID: 37360846 PMCID: PMC10288497 DOI: 10.1021/acsnanoscienceau.2c00066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 06/28/2023]
Abstract
Corticosteroids are widely used as an anti-inflammatory treatment for eye inflammation, but the current methods used in clinical practice for delivery are in the form of eye drops which is usually complicated for patients or ineffective. This results in an increase in the risk of detrimental side effects. In this study, we demonstrated proof-of-concept research for the development of a contact lens-based delivery system. The sandwich hydrogel contact lens consists of a polymer microchamber film made via soft lithography with an encapsulated corticosteroid, in this case, dexamethasone, located inside the contact lens. The developed delivery system showed sustained and controlled release of the drug. The central visual part of the lenses was cleared from the polylactic acid microchamber in order to maintain a clean central aperture similar to the cosmetic-colored hydrogel contact lenses.
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Affiliation(s)
- Valeriya Kudryavtseva
- School
of Engineering and Materials Science, Queen
Mary University of London, London E1 4NS, U.K.
- National
Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russian
Federation
| | - Mariana Otero
- School
of Engineering and Materials Science, Queen
Mary University of London, London E1 4NS, U.K.
| | - Jiaxin Zhang
- Biochemical
Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, U.K.
| | - Anton Bukatin
- Alferov
Saint Petersburg National Research Academic University of the Russian
Academy of Sciences, 8/3A Khlopina str., Saint Petersburg 194021, Russian
Federation
- Institute
for Analytical Instrumentation of the Russian Academy of Sciences, 31-33 A, Ivana Chernykh str., Saint Petersburg 198095, Russia
| | - David Gould
- Biochemical
Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, U.K.
| | - Gleb B. Sukhorukov
- School
of Engineering and Materials Science, Queen
Mary University of London, London E1 4NS, U.K.
- Skolkovo
Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow 121205, Russian
Federation
- Siberian
State Medical University, Moskovskiy Trakt, 2, Tomsk 634050, Russian Federation
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9
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Simmons DW, Schuftan DR, Ramahdita G, Huebsch N. Hydrogel-Assisted Double Molding Enables Rapid Replication of Stereolithographic 3D Prints for Engineered Tissue Design. ACS Appl Mater Interfaces 2023. [PMID: 37200617 DOI: 10.1021/acsami.3c02279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Tissue-engineered in vitro models are an essential tool in biomedical research. Tissue geometry is a key determinant of function, but controlling the geometry of microscale tissues remains challenging. Additive manufacturing approaches have emerged as a promising means for rapid and iterative changes in the geometry of microdevices. However, it has been shown that poly(dimethylsiloxane) (PDMS) cross-linking is often inhibited at the interface of materials printed with stereolithography. While approaches to replica mold stereolithographic three-dimensional (3D) prints have been described, these methods are inconsistent and often lead to print destruction when unsuccessful. Additionally, 3D-printed materials often leach toxic chemicals into directly molded PDMS. Here, we developed a double molding approach that allows precise replication of high-resolution stereolithographic prints into poly(dimethylsiloxane) (PDMS) elastomer, facilitating rapid design iterations and highly parallelized sample production. Inspired by lost wax casting, we used hydrogels as intermediary molds to transfer high-resolution features from high-resolution 3D prints into PDMS, while previously published work focused on enabling direct molding of PDMS onto 3D prints through the use of coatings and post-cross-linking treatments of the 3D print itself. Hydrogel mechanical properties, including cross-link density, predict replication fidelity. We demonstrate the ability of this approach to replicate a variety of shapes that would be impossible to create using photolithography techniques traditionally used to create engineered tissue designs. This method also enabled the replication of 3D-printed features into PDMS that would not be possible with direct molding as the stiffness of these materials leads to material fracture when unmolding, while the increased toughness in the hydrogels can elastically deform around complex features and maintain replication fidelity. Finally, we highlight the ability of this method to minimize the potential for toxic materials to transfer from the original 3D print into the PDMS replica, enhancing its use for biological applications. This minimization of the transfer of toxic materials has not been reported in other previously reported methods describing replication of 3D prints into PDMS, and we demonstrate its use through the creation of stem cell-derived microheart muscles. This method can also be used in future studies to understand the effects of geometry on engineered tissues and their constitutive cells.
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Affiliation(s)
- Daniel W Simmons
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
- NSF Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - David R Schuftan
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Ghiska Ramahdita
- NSF Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri 63130, United States
- Department of Mechanical Engineering & Materials Science, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Nathaniel Huebsch
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
- NSF Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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10
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Rhee D, Lee YAL, Odom TW. Area-Specific, Hierarchical Nanowrinkling of Two-Dimensional Materials. ACS Nano 2023; 17:6781-6788. [PMID: 36989457 DOI: 10.1021/acsnano.3c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
This paper describes an approach to generate hierarchical wrinkles in two-dimensional (2D) electronic materials with spatial control over adjacent wavelengths. A rigid fluoropolymer mold was used to pattern a sacrificial polymer skin layer on monolayer graphene, molybdenum disulfide, and hexagonal boron nitride on prestrained thermoplastic sheets. Strain relief and removal of the polymer layer resulted in 2D-material wrinkles whose wavelengths scaled linearly with the local skin thickness. A second generation of wrinkles could be created on top of the first generation by applying a subsequent cycle of polymer skin coating, strain relief, and polymer removal. This area-specific hierarchical wrinkling is general and will facilitate the engineering of the local properties of various 2D materials and their heterostructures.
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11
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Palange AL, Mascolo DD, Ferreira M, Gawne PJ, Spanò R, Felici A, Bono L, Moore TL, Salerno M, Armirotti A, Decuzzi P. Boosting the Potential of Chemotherapy in Advanced Breast Cancer Lung Metastasis via Micro-Combinatorial Hydrogel Particles. Adv Sci (Weinh) 2023; 10:e2205223. [PMID: 36683230 PMCID: PMC10074128 DOI: 10.1002/advs.202205223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Breast cancer cell colonization of the lungs is associated with a dismal prognosis as the distributed nature of the disease and poor permeability of the metastatic foci challenge the therapeutic efficacy of small molecules, antibodies, and nanomedicines. Taking advantage of the unique physiology of the pulmonary circulation, here, micro-combinatorial hydrogel particles (µCGP) are realized via soft lithographic techniques to enhance the specific delivery of a cocktail of cytotoxic nanoparticles to metastatic foci. By cross-linking short poly(ethylene glycol) (PEG) chains with erodible linkers within a shape-defining template, a deformable and biodegradable polymeric skeleton is realized and loaded with a variety of therapeutic and imaging agents, including docetaxel-nanoparticles. In a model of advanced breast cancer lung metastasis, µCGP amplified the colocalization of docetaxel-nanoparticles with pulmonary metastatic foci, prolonged the retention of chemotoxic molecules at the diseased site, suppressed lesion growth, and boosted survival beyond 20 weeks post nodule engraftment. The flexible design and modular architecture of µCGP would allow the efficient deployment of complex combination therapies in other vascular districts too, possibly addressing metastatic diseases of different origins.
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Affiliation(s)
- Anna Lisa Palange
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Daniele Di Mascolo
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Miguel Ferreira
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
- Present address:
Harvard Medical School, Department of RadiologyMassachusetts General HospitalBostonMA02114USA
| | - Peter J. Gawne
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Raffaele Spanò
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Alessia Felici
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
- Present address:
Division of Oncology, Department of Medicine and Department of PathologyStanford University School of MedicineStanfordCA94305USA
| | - Luca Bono
- Analytical Chemistry FacilityFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Thomas Lee Moore
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Marco Salerno
- Materials Characterization FacilityFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Andrea Armirotti
- Analytical Chemistry FacilityFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
| | - Paolo Decuzzi
- Laboratory of Nanotechnology for Precision MedicineFondazione Istituto Italiano di TecnologiaVia Morego 30Genoa16163Italy
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12
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Salvatore M, Reda F, Borbone F, Januariyasa IK, Maddalena P, Oscurato SL. Diffractive Refractometer Based on Scalar Theory. Polymers (Basel) 2023; 15:polym15071605. [PMID: 37050219 PMCID: PMC10096849 DOI: 10.3390/polym15071605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
The measurement of the refractive index typically requires the use of optical ellipsometry which, although potentially very accurate, is extremely sensitive to the structural properties of the sample and its theoretical modeling, and typically requires specialized expertise to obtain reliable output data. Here, we propose a simple diffractive method for the measurement of the refractive index of homogenous solid thin films, which requires only the structuring of the surface of the material to be measured with the profile of a diffraction grating. The refractive index of an exemplary soft-moldable material is successfully estimated over a wide wavelength range by simply incorporating the measured topography and diffraction efficiency of the grating into a convenient scalar theory-based diffraction model. Without the need for specialized expertise and equipment, the method can serve as a simple and widely accessible optical characterization of materials useful in material science and photonics applications.
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Affiliation(s)
- Marcella Salvatore
- Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cintia 21, 80126 Naples, Italy
- Physics Department "E. Pancini", University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Francesco Reda
- Physics Department "E. Pancini", University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Fabio Borbone
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - I Komang Januariyasa
- Physics Department "E. Pancini", University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Pasqualino Maddalena
- Physics Department "E. Pancini", University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Stefano Luigi Oscurato
- Physics Department "E. Pancini", University of Naples "Federico II", Complesso Universitario di Monte Sant'Angelo, Via Cinthia 21, 80126 Naples, Italy
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13
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Javorskis T, Rakickas T, Janku̅naitė A, Vaitekonis Š, Ulčinas A, Orentas E. Maskless, Reusable Visible-Light Direct-Write Stamp for Microscale Surface Patterning. ACS Appl Mater Interfaces 2023; 15:11259-11267. [PMID: 36797999 PMCID: PMC11008783 DOI: 10.1021/acsami.2c20568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
We report a straightforward method for creating large-area, microscale resolution patterns of functional amines on self-assembled monolayers by the photoinduced local acidification of a flat elastomeric stamp enriched with photoacid. The limited diffusivity of the photoactivated merocyanine acid in poly(dimethylsiloxane) (PDMS) enabled to confine efficient deprotection of N-tert-butyloxycarbonyl amino group (N-Boc) to line widths below 10 μm. The experimental setup is very simple and is built around the conventional HD-DVD optical pickup. The method allows cost-efficient, maskless, large-area chemical patterning while avoiding potentially cytotoxic photochemical reaction products. The activation of the embedded photoacid occurs within the stamp upon illumination with the laser beam and the process is fully reversible. Preliminary positive results highlight the possibility of repeatable use of the same stamp for the creation of different patterns.
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Affiliation(s)
- Tomas Javorskis
- Department
of Nanoengineering, Center for Physical
Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
| | - Tomas Rakickas
- Department
of Nanoengineering, Center for Physical
Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
| | - Alberta Janku̅naitė
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania
| | - Šaru̅nas Vaitekonis
- Department
of Nanoengineering, Center for Physical
Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
| | - Artu̅ras Ulčinas
- Department
of Nanoengineering, Center for Physical
Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
| | - Edvinas Orentas
- Department
of Nanoengineering, Center for Physical
Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania
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14
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Aftenieva O, Brunner J, Adnan M, Sarkar S, Fery A, Vaynzof Y, König TAF. Directional Amplified Photoluminescence through Large-Area Perovskite-Based Metasurfaces. ACS Nano 2023; 17:2399-2410. [PMID: 36661409 PMCID: PMC9955732 DOI: 10.1021/acsnano.2c09482] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
Perovskite nanocrystals are high-performance, solution-processed materials with a high photoluminescence quantum yield. Due to these exceptional properties, perovskites can serve as building blocks for metasurfaces and are of broad interest for photonic applications. Here, we use a simple grating configuration to direct and amplify the perovskite nanocrystals' original omnidirectional emission. Thus far, controlling these radiation properties was only possible over small areas and at a high expense, including the risks of material degradation. Using a soft lithographic printing process, we can now reliably structure perovskite nanocrystals from the organic solution into light-emitting metasurfaces with high contrast on a large area. We demonstrate the 13-fold amplified directional radiation with an angle-resolved Fourier spectroscopy, which is the highest observed amplification factor for the perovskite-based metasurfaces. Our self-assembly process allows for scalable fabrication of gratings with predefined periodicities and tunable optical properties. We further show the influence of solution concentration on structural geometry. By increasing the perovskite concentration 10-fold, we can produce waveguide structures with a grating coupler in one printing process. We analyze our approach with numerical modeling, considering the physiochemical properties to obtain the desired geometry. This strategy makes the tunable radiative properties of such perovskite-based metasurfaces usable for nonlinear light-emitting devices and directional light sources.
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Affiliation(s)
- Olha Aftenieva
- Leibniz-Institut
für Polymerforschung e.V., Hohe Straße 6, 01069Dresden, Germany
| | - Julius Brunner
- Integrated
Centre for Applied Physics and Photonic Materials and Centre for Advancing
Electronics Dresden (cfaed), Technical University
of Dresden, Nöthnitzer Straße 61, 01187Dresden, Germany
| | - Mohammad Adnan
- Leibniz-Institut
für Polymerforschung e.V., Hohe Straße 6, 01069Dresden, Germany
| | - Swagato Sarkar
- Leibniz-Institut
für Polymerforschung e.V., Hohe Straße 6, 01069Dresden, Germany
| | - Andreas Fery
- Leibniz-Institut
für Polymerforschung e.V., Hohe Straße 6, 01069Dresden, Germany
- Physical
Chemistry of Polymeric Materials, Technische
Universität Dresden, Bergstraße 66, 01069Dresden, Germany
| | - Yana Vaynzof
- Integrated
Centre for Applied Physics and Photonic Materials and Centre for Advancing
Electronics Dresden (cfaed), Technical University
of Dresden, Nöthnitzer Straße 61, 01187Dresden, Germany
- Center
for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062Dresden, Germany
| | - Tobias A. F. König
- Leibniz-Institut
für Polymerforschung e.V., Hohe Straße 6, 01069Dresden, Germany
- Center
for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062Dresden, Germany
- Faculty of
Chemistry and Food Chemistry, Technische
Universität Dresden, Bergstraße 66, 01069Dresden, Germany
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15
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Choubey A, Dubey K, Bahga SS. Rapid prototyping of polydimethylsiloxane (PDMS) microchips using electrohydrodynamic jet printing: Application to electrokinetic assays. Electrophoresis 2023; 44:725-732. [PMID: 36774545 DOI: 10.1002/elps.202200241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/13/2023]
Abstract
Polydimethylsiloxane (PDMS) based microfluidic devices have found increasing utility for electrophoretic and electrokinetic assays because of their ease of fabrication using replica molding. However, the fabrication of high-resolution molds for replica molding still requires the resource-intensive and time-consuming photolithography process, which precludes quick design iterations and device optimization. We here demonstrate a low-cost, rapid microfabrication process, based on electrohydrodynamic jet printing (EJP), for fabricating non-sacrificial master molds for replica molding of PDMS microfluidic devices. The method is based on the precise deposition of an electrically stretched polymeric solution of polycaprolactone in acetic acid on a silicon wafer placed on a computer-controlled motion stage. This process offers the high-resolution (order 10 μ $\umu$ m) capability of photolithography and rapid prototyping capability of inkjet printing to print high-resolution templates for elastomeric microfluidic devices within a few minutes. Through proper selection of the operating parameters such as solution flow rate, applied electric field, and stage speed, we demonstrate microfabrication of intricate master molds and corresponding PDMS microfluidic devices for electrokinetic applications. We demonstrate the utility of the fabricated PDMS microchips for nonlinear electrokinetic processes such as electrokinetic instability and controlled sample splitting in ITP. The ability to rapid prototype customized reusable master molds with order 10 μ $\umu$ m resolution within a few minutes can help in designing and optimizing microfluidic devices for various electrokinetic applications.
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Affiliation(s)
- Anupam Choubey
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Kaushlendra Dubey
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Supreet Singh Bahga
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India
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16
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Milana E, Gorissen B, De Borre E, Ceyssens F, Reynaerts D, De Volder M. Out-of-Plane Soft Lithography for Soft Pneumatic Microactuator Arrays. Soft Robot 2023; 10:197-204. [PMID: 35704896 DOI: 10.1089/soro.2021.0106] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Elastic pneumatic actuators are fueling new devices and applications in soft robotics. Actuator miniaturization is critical to enable soft microsystems for applications in microfluidics and micromanipulation. This work proposes a fabrication technique to make out-of-plane bending microactuators entirely by soft lithography. The only bonding step required is to seal the embedded fluidic channels, assuring the structural integrity of the microactuators. The process consists of fabricating two SU8 mold halves using different lithographic layers. Polydimethilsiloxane is poured on the bottom mold, which is subsequently aligned and assembled with the top mold. The process allows for out-of-plane actuators with a diameter of 300 μm and for fabricating arrays of up to 36 actuators that are row addressable. These active micropillars have an aspect ratio of 1:1.5 and, when pressurized at 1 bar, show a bending angle of ∼30°.
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Affiliation(s)
- Edoardo Milana
- Department of Mechanical Engineering, KU Leuven and Flanders Make, Leuven, Belgium
| | - Benjamin Gorissen
- Department of Mechanical Engineering, KU Leuven and Flanders Make, Leuven, Belgium
| | - Eline De Borre
- Department of Mechanical Engineering, KU Leuven and Flanders Make, Leuven, Belgium
| | - Frederik Ceyssens
- Department of Electrical Engineering (ESAT), KU Leuven, Leuven, Belgium
| | - Dominiek Reynaerts
- Department of Mechanical Engineering, KU Leuven and Flanders Make, Leuven, Belgium
| | - Michael De Volder
- Department of Mechanical Engineering, KU Leuven and Flanders Make, Leuven, Belgium.,Department of Engineering, Institute for Manufacturing, University of Cambridge, Cambridge, United Kingdom
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17
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Redolat J, Camarena-Pérez M, Griol A, Kovylina M, Xomalis A, Baumberg JJ, Martínez A, Pinilla-Cienfuegos E. Accurate Transfer of Individual Nanoparticles onto Single Photonic Nanostructures. ACS Appl Mater Interfaces 2023; 15:3558-3565. [PMID: 36538469 PMCID: PMC9869328 DOI: 10.1021/acsami.2c13633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Controlled integration of metallic nanoparticles (NPs) onto photonic nanostructures enables the realization of complex devices for extreme light confinement and enhanced light-matter interaction. For instance, such NPs could be massively integrated on metal plates to build nanoparticle-on-mirror (NPoM) nanocavities or photonic integrated waveguides (WGs) to build WG-driven nanoantennas. However, metallic NPs are usually deposited via drop-casting, which prevents their accurate positioning. Here, we present a methodology for precise transfer and positioning of individual NPs onto different photonic nanostructures. Our method is based on soft lithography printing that employs elastomeric stamp-assisted transfer of individual NPs onto a single nanostructure. It can also parallel imprint many individual NPs with high throughput and accuracy in a single step. Raman spectroscopy confirms enhanced light-matter interactions in the resulting NPoM-based nanophotonic devices. Our method mixes top-down and bottom-up nanofabrication techniques and shows the potential of building complex photonic nanodevices for multiple applications ranging from enhanced sensing and spectroscopy to signal processing.
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Affiliation(s)
- Javier Redolat
- Nanophotonics
Technology Center, Universitat Politècnica
de València, ValenciaE46022, Spain
| | - María Camarena-Pérez
- Nanophotonics
Technology Center, Universitat Politècnica
de València, ValenciaE46022, Spain
| | - Amadeu Griol
- Nanophotonics
Technology Center, Universitat Politècnica
de València, ValenciaE46022, Spain
| | - Miroslavna Kovylina
- Nanophotonics
Technology Center, Universitat Politècnica
de València, ValenciaE46022, Spain
| | - Angelos Xomalis
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thompson Avenue, CambridgeCB3 0HE, U.K.
- Laboratory
for Mechanics of Materials and Nanostructures, Empa, Swiss Federal Laboratories for Materials Science and Technology, Thun3602, Switzerland
| | - Jeremy J. Baumberg
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thompson Avenue, CambridgeCB3 0HE, U.K.
| | - Alejandro Martínez
- Nanophotonics
Technology Center, Universitat Politècnica
de València, ValenciaE46022, Spain
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18
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Wu W, Singh M, Zhai Y, Masud A, Tonny W, Yuan C, Yin R, Al-Enizi AM, Bockstaller MR, Matyjaszewski K, Douglas JF, Karim A. Facile Entropy-Driven Segregation of Imprinted Polymer-Grafted Nanoparticle Brush Blends by Solvent Vapor Annealing Soft Lithography. ACS Appl Mater Interfaces 2022; 14:45765-45774. [PMID: 36174114 DOI: 10.1021/acsami.2c11134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Polymer-grafted nanoparticles (PGNPs) have attracted extensive research interest due to their potential for enhancing mechanical and electrical properties of both bulk polymer composite materials, as well as thin polymer films incorporating these nanoparticles (NPs). In previous studies, we have shown that an entropic driving force serves to organize low-molecular-mass PGNPs in imprinted blend films of PGNPs with low-molecular-mass homopolymers. In this work, we developed a novel solvent vapor annealing soft lithography (SVA-SL) method to overcome the technical difficulties in processing the high-molecular-mass PGNP blends due to the intrinsically sluggish melt annealing kinetics found in the phase separation of these blend PGNP materials. In particular, we utilized SVA-SL to create nanopatterns in blends of PGNPs having relatively high-molecular-mass-grafted layers but with cores of NPs having greatly different sizes. The minimization of the entropic free energy in the present system corresponded to larger PGNPs partitioning almost exclusively into the "mesa" regions of the imprinted PGNP blend films, as quantified by the estimation of the partition coefficient, Kp. The use of the SVA-SL processing method is important because it allows facile imprint patterning of PGNP materials and large-scale organization of the PGNPs even when the grafted chain lengths are long enough for the chains to be highly entangled, allowing enhanced thermo-mechanical property enhancements of the resulting films and a corresponding extended range of potential nanotech applications.
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Affiliation(s)
- Wenjie Wu
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Maninderjeet Singh
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Yue Zhai
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States
| | - Ali Masud
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
| | - Wafa Tonny
- Department of Materials Science and Engineering, University of Houston, Houston, Texas77204, United States
| | - Chuqing Yuan
- Department of Materials Science and Engineering, University of Houston, Houston, Texas77204, United States
| | - Rongguan Yin
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States
| | - Abdullah M Al-Enizi
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh11451, Saudi Arabia
| | - Michael R Bockstaller
- Department of Materials Science and Engineering, University of Houston, Houston, Texas77204, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States
| | - Jack F Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland20899, United States
| | - Alamgir Karim
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas77204, United States
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19
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Lee J, Kim M. Polymeric Microfluidic Devices Fabricated Using Epoxy Resin for Chemically Demanding and Day-Long Experiments. Biosensors (Basel) 2022; 12:838. [PMID: 36290975 PMCID: PMC9599855 DOI: 10.3390/bios12100838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/30/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Polydimethylsiloxane (PDMS) is a widely used material in laboratories for fabricating microfluidic devices with a rapid and reproducible prototypingability, owing to its inherent properties (e.g., flexibility, air permeability, and transparency). However, the PDMS channel is easily deformed under pressures applied to generate flows because of its elasticity, which can affect the robustness of experiments. In addition, air permeability of PDMS causes the pervaporation of water, and its porous structure absorbs oil and even small hydrophobic molecules, rendering it inappropriate for chemically demanding or day-long experiments. In this study, we develop a rapid and reproducible fabrication method for polymer-based rigid microfluidic devices, using epoxy resin that can overcome the limitations of PDMS channels, which are structurally and chemically robust. We first optimize a high-resolution fabrication protocol to achieve convenient and repeatable prototyping of polymeric devices via epoxy casting using PDMS soft molds. In addition, we compare the velocity changes in PDMS microchannels by tracking fluorescent particles in various flows (~133 μL/min) to demonstrate the structural robustness of the polymeric device. Furthermore, by comparing the adsorption of fluorescent hydrophobic chemicals and the pervaporation through channel walls, we demonstrate the excellent chemical resistance of the polymeric device and its suitability for day-long experiments. The rigid polymeric device can facilitate lab-on-chip research and enable various applications, such as high-performance liquid chromatography, anaerobic bacterial culture, and polymerase chain reaction, which require chemically or physically demanding experiments.
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Affiliation(s)
- Jaeseok Lee
- Department of Mechanical System Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
- Department of Aeronautics, Mechanical and Electronic Convergence Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
| | - Minseok Kim
- Department of Mechanical System Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
- Department of Aeronautics, Mechanical and Electronic Convergence Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
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20
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Koucherian NE, Yan S, Hui EE. Fabrication of Multilayer Molds by Dry Film Photoresist. Micromachines (Basel) 2022; 13:1583. [PMID: 36295936 PMCID: PMC9608710 DOI: 10.3390/mi13101583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 08/29/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Dry film photoresists are widely employed to fabricate high-aspect-ratio microstructures, such as molds for microfluidic devices. Unlike liquid resists, such as SU-8, dry films do not require a cleanroom facility, and it is straightforward to prepare uniform and reproducible films as thick as 500 µm. Multilayer patterning, however, can be problematic with dry film resists even though it is critical for a number of microfluidic devices. Layer-to-layer mask alignment typically requires the first layer to be fully developed, making the pattern visible, before applying and patterning the second layer. While a liquid resist can flow over the topography of previous layers, this is not the case with dry film lamination. We found that post-exposure baking of dry film photoresists can preserve a flat topography while revealing an image of the patterned features that is suitable for alignment to the next layer. We demonstrate the use of this technique with two different types of dry film resist to fabricate master molds for a hydrophoresis size-sorting device and a cell chemotaxis device.
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21
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Sadeghi I, Lu X, Sarmadi M, Langer R, Jaklenec A. Micromolding of Thermoplastic Polymers for Direct Fabrication of Discrete, Multilayered Microparticles. Small Methods 2022; 6:e2200232. [PMID: 35764872 DOI: 10.1002/smtd.202200232] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Soft lithography provides a convenient and effective method for the fabrication of microdevices with uniform size and shape. However, formation of an embossed, connective film as opposed to discrete features has been an enduring shortcoming associated with soft lithography. Removing this residual layer requires additional postprocessing steps that are often incompatible with organic materials. This limits adaptation and widespread realization of soft lithography for broader applications particularly in drug discovery and drug delivery fields. A novel and versatile approach is demonstrated that enables fabrication of discrete, multilayered, fillable, and harvestable microparticles directly from any thermoplastic polymer, even at very high molecular weights. The approach, isolated microparticle replication via surface-segregating polymer blend mold, utilizes a random copolymer additive, designed with a highly fluorinated segment that, when blended with the mold's matrix, spontaneously orients to the surface conferring an extremely low surface energy and nonwetting properties to the template. The extremely nonwetting properties of the mold are further utilized to load soluble biologics directly into the built-in microwells in a rapid and efficient manner using an innovative screen-printing approach. It is believed that this approach holds promise for fabrication of large-array, 3D, complex microstructures, and is a significant step toward clinical translation of microfabrication technologies.
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Affiliation(s)
- Ilin Sadeghi
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Xueguang Lu
- Beijing National Laboratory for Molecular Science, Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Morteza Sarmadi
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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22
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Gan Z, Najafidehaghani E, Han SH, Shradha S, Abtahi F, Neumann C, Picker J, Vogl T, Hübner U, Eilenberger F, George A, Turchanin A. Patterned Growth of Transition Metal Dichalcogenide Monolayers and Multilayers for Electronic and Optoelectronic Device Applications. Small Methods 2022; 6:e2200300. [PMID: 35957515 DOI: 10.1002/smtd.202200300] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/14/2022] [Indexed: 06/15/2023]
Abstract
A simple, large area, and cost-effective soft lithographic method is presented for the patterned growth of high-quality 2D transition metal dichalcogenides (TMDs). Initially, a liquid precursor (Na2 MoO4 in an aqueous solution) is patterned on the growth substrate using the micromolding in capillaries technique. Subsequently, a chemical vapor deposition step is employed to convert the precursor patterns to monolayer, few layers, or bulk TMDs, depending on the precursor concentration. The grown patterns are characterized using optical microscopy, atomic force microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and photoluminescence spectroscopy to reveal their morphological, chemical, and optical characteristics. Additionally, electronic and optoelectronic devices are realized using the patterned TMDs and tested for their applicability in field effect transistors and photodetectors. The photodetectors made of MoS2 line patterns show a very high responsivity of 7674 A W-1 and external quantum efficiency of 1.49 × 106 %. Furthermore, the multiple grain boundaries present in patterned TMDs enable the fabrication of memtransistor devices. The patterning technique presented here may be applied to many other TMDs and related heterostructures, potentially advancing the fabrication of TMDs-based device arrays.
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Affiliation(s)
- Ziyang Gan
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
| | - Emad Najafidehaghani
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
| | - Seung Heon Han
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
| | - Sai Shradha
- Institute of Applied Physics, Friedrich Schiller University Jena, Albert-Einstein-Str 15, 07745, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
| | - Fatemeh Abtahi
- Institute of Applied Physics, Friedrich Schiller University Jena, Albert-Einstein-Str 15, 07745, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
| | - Christof Neumann
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
| | - Julian Picker
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
| | - Tobias Vogl
- Institute of Applied Physics, Friedrich Schiller University Jena, Albert-Einstein-Str 15, 07745, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Uwe Hübner
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745, Jena, Germany
| | - Falk Eilenberger
- Institute of Applied Physics, Friedrich Schiller University Jena, Albert-Einstein-Str 15, 07745, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
- Fraunhofer-Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Str. 7, 07745, Jena, Germany
| | - Antony George
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
| | - Andrey Turchanin
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743, Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str 6, 07745, Jena, Germany
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23
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Monteiro NO, Oliveira C, Silva TH, Martins A, Fangueiro JF, Reis RL, Neves NM. Biomimetic Surface Topography from the Rubus fruticosus Leaf as a Guidance of Angiogenesis in Tissue Engineering Applications. ACS Biomater Sci Eng 2022; 8:2943-2953. [PMID: 35706335 DOI: 10.1021/acsbiomaterials.2c00264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The promotion of angiogenesis is a fundamental step for efficient organ/tissue reconstitution and replacement. Thus, several strategies to promote vascularization of scaffolds were studied to satisfy this unsolved clinical need. The interface between cells and substrates is a determinant for the success of tissue engineering (TE) strategies. Substrate's topography is reported to play a key role in influencing endothelial cell behavior, namely, on its proliferation, metabolic activity, morphology, migration, and secretion of cytokines and chemokines. Therefore, surface topography of the biomaterial-based grafts is a crucial property that is considered in the development of a new TE approach. Herein, we hypothesize that the surface of Rubus fruticosus leaf plays a crucial role in driving angiogenesis since its architecture resembles the vascular structures at a biologically relevant size scale. For this, we produced biomimetic polycaprolactone (PCL) membranes (BpMs) replicating the surface topography of a R. fruticosus leaf by replica molding and nanoimprint lithography. Our results showed an enhanced performance in terms of proliferation of the human endothelial cell line on top of the BpM. Moreover, an asymmetric cellular spatial distribution among the surface of the BpM was observed. These cells seem to have higher density for longer time periods in the region that replicates the leaf veins. Finally, we assess the angiogenic capacity through a chick chorioallantoic membrane assay, revealing that BpMs are more prone to support angiogenesis than flat PCL membranes. We strongly believe that this strategy can bring new insights into developing TE strategies with an enhanced performance in terms of the vascular integration between the host and the scaffolds implanted.
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Affiliation(s)
- Nelson O Monteiro
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Catarina Oliveira
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Tiago H Silva
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Albino Martins
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana F Fangueiro
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno M Neves
- 3B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's─PT Government Associate Laboratory, Braga/Guimarães, Portugal
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24
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Alon H, Vitoshkin H, Ziv C, Gunamalai L, Sinitsa S, Kleiman M. Self-Cleaning Biomimetic Surfaces-The Effect of Microstructure and Hydrophobicity on Conidia Repellence. Materials (Basel) 2022; 15:2526. [PMID: 35407860 DOI: 10.3390/ma15072526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/21/2022] [Accepted: 03/24/2022] [Indexed: 01/11/2023]
Abstract
Modification of surface structure for the promotion of food safety and health protection is a technology of interest among many industries. With this study, we aimed specifically to develop a tenable solution for the fabrication of self-cleaning biomimetic surface structures for agricultural applications such as post-harvest packing materials and greenhouse cover screens. Phytopathogenic fungi such as Botrytiscinerea are a major concern for agricultural systems. These molds are spread by airborne conidia that contaminate surfaces and infect plants and fresh produce, causing significant losses. The research examined the adhesive role of microstructures of natural and synthetic surfaces and assessed the feasibility of structured biomimetic surfaces to easily wash off fungal conidia. Soft lithography was used to create polydimethylsiloxane (PDMS) replications of Solanum lycopersicum (tomato) and Colocasia esculenta (elephant ear) leaves. Conidia of B. cinerea were applied to natural surfaces for a washing procedure and the ratios between applied and remaining conidia were compared using microscopy imaging. The obtained results confirmed the hypothesis that the dust-repellent C. esculenta leaves have a higher conidia-repellency compared to tomato leaves which are known for their high sensitivities to phytopathogenic molds. This study found that microstructure replication does not mimic conidia repellency found in nature and that conidia repellency is affected by a mix of parameters, including microstructure and hydrophobicity. To examine the effect of hydrophobicity, the study included measurements and analyses of apparent contact angles of natural and synthetic surfaces including activated (hydrophilic) surfaces. No correlation was found between the surface apparent contact angle and conidia repellency ability, demonstrating variation in washing capability correlated to microstructure and hydrophobicity. It was also found that a microscale sub-surface (tomato trichromes) had a high conidia-repelling capability, demonstrating an important role of non-superhydrophobic microstructures.
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25
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Nadine S, Chung A, Diltemiz SE, Yasuda B, Lee C, Hosseini V, Karamikamkar S, de Barros NR, Mandal K, Advani S, Zamanian BB, Mecwan M, Zhu Y, Mofidfar M, Zare MR, Mano J, Dokmeci MR, Alambeigi F, Ahadian S. Advances in microfabrication technologies in tissue engineering and regenerative medicine. Artif Organs 2022; 46:E211-E243. [PMID: 35349178 DOI: 10.1111/aor.14232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/02/2022] [Accepted: 02/28/2022] [Indexed: 12/17/2022]
Abstract
BACKGROUND Tissue engineering provides various strategies to fabricate an appropriate microenvironment to support the repair and regeneration of lost or damaged tissues. In this matter, several technologies have been implemented to construct close-to-native three-dimensional structures at numerous physiological scales, which are essential to confer the functional characteristics of living tissues. METHODS In this article, we review a variety of microfabrication technologies that are currently utilized for several tissue engineering applications, such as soft lithography, microneedles, templated and self-assembly of microstructures, microfluidics, fiber spinning, and bioprinting. RESULTS These technologies have considerably helped us to precisely manipulate cells or cellular constructs for the fabrication of biomimetic tissues and organs. Although currently available tissues still lack some crucial functionalities, including vascular networks, innervation, and lymphatic system, microfabrication strategies are being proposed to overcome these issues. Moreover, the microfabrication techniques that have progressed to the preclinical stage are also discussed. CONCLUSIONS This article aims to highlight the advantages and drawbacks of each technique and areas of further research for a more comprehensive and evolving understanding of microfabrication techniques in terms of tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Sara Nadine
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA.,CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Ada Chung
- Department of Psychology, University of California-Los Angeles, Los Angeles, California, USA
| | | | - Brooke Yasuda
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA.,Department of Psychology, University of California-Los Angeles, Los Angeles, California, USA
| | - Charles Lee
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA.,Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas, USA.,Station 1, Lawrence, Massachusetts, USA
| | - Vahid Hosseini
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | - Solmaz Karamikamkar
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | | | - Kalpana Mandal
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | - Shailesh Advani
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | | | - Marvin Mecwan
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | - Yangzhi Zhu
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | - Mohammad Mofidfar
- Department of Chemistry, Stanford University, Palo Alto, California, USA
| | | | - João Mano
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Mehmet Remzi Dokmeci
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
| | - Farshid Alambeigi
- Walker Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas, USA
| | - Samad Ahadian
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, California, USA
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Abstract
Natural compound eyes endow arthropods with wide-field high-performance light-harvesting capability that enables them to capture prey and avoid natural enemies in dim light. Inspired by natural compound eyes, a curved artificial-compound-eye (cACE) photodetector for diffused light harvesting is proposed and fabricated, and its light-harvesting capability is systematically investigated. The cACE photodetector is fabricated by introducing a cACE as a light-harvesting layer on the surface of a silicon-based photodetector, with the cACE being prepared via planar artificial-compound-eye (pACE) template deformation. The distinctive geometric morphology of the as-prepared cACE effectively reduces its surface reflection and the dependence of the projected area on the incident light direction, thereby significantly improving the light-harvesting ability and output photocurrent of the silicon-based photodetector. Furthermore, the performances of cACE, pACE, and bare polydimethylsiloxane (PDMS)-attached photodetectors as diffused light detectors are investigated under different luminances. The cACE-photodetector output photocurrent is 1.395 and 1.29 times those of the bare PDMS-attached and pACE photodetectors, respectively. Moreover, this photodetector has a desirable geometric shape. Thus, the proposed cACE photodetector will facilitate development of high-performance photodetectors for luminance sensing.
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Affiliation(s)
- Xinxue Wu
- Wenzhou Key Laboratory of Micro-nano Optoelectronic Devices, College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Chaolong Fang
- Wenzhou Key Laboratory of Micro-nano Optoelectronic Devices, College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Wangdong Xu
- Wenzhou Key Laboratory of Micro-nano Optoelectronic Devices, College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Dawei Zhang
- Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
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27
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Thakur S, Dasmahapatra AK, Bandyopadhyay D. Self-Organized Liquid Crystal Droplets as Phototunable Softmasks. ACS Appl Mater Interfaces 2021; 13:60697-60712. [PMID: 34874157 DOI: 10.1021/acsami.1c21811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A single-step self-organized pathway is harnessed to generate large-area and high-density liquid-crystal (LC) microdroplets via rapid spreading of an LC-laden volatile liquid film on an aqueous surfactant bath. The surfactant loading on the water bath and LC loading in the solvent fluid help in tuning the size, periodicity, and ordering of LC microdroplets. Remarkably, the experiments reveal a transition from a spinodal to heterogeneous nucleation pathway of dewetting when the surfactant loading is modulated from below to beyond the critical micellar concentration in the aqueous phase. In the process, a host of unprecedented drop formation modes, such as dewetting and contact-line instability, random ejection, and "fire cracker" toroid splitting, have been uncovered. Subsequently, the LC microdroplets on the air-water interface are employed as photomasks suitable for soft-photolithography applications. Such masks help in the decoration of a host of mesoscale three-dimensional features on the films of photoresists when photons are guided through the LC droplets. In such a scenario, phase transition of LC droplets under solvent vapor annealing is employed to control the movement of photons through drops and subsequently modulate the light exposure on the photoresist surface. Such a simple soft-photolithography setup leads to an array of flattened droplets on a positive resist, while donut features are observed on the negative tone. Remarkably, the orientation of nematogens within 4-cyano-4'-pentylbiphenyl droplets and at the three-phase contact-line provides additional handles in controlling the transmission of photons, which facilitates such a unique pattern formation. A number of low-cost and simple strategies are also discussed to order such soft-photolithography patterns. Importantly, with a minor modification to the same experimental setup, we could also measure the variation in the order parameter of the LC droplet during its phase transitions from the nematic to isotropic state.
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Affiliation(s)
- Siddharth Thakur
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Ashok Kumar Dasmahapatra
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Dipankar Bandyopadhyay
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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28
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Abd Wahid NA, Hashemi A, Evans JJ, Alkaisi MM. Conductive Bioimprint Using Soft Lithography Technique Based on PEDOT:PSS for Biosensing. Bioengineering (Basel) 2021; 8:204. [PMID: 34940357 DOI: 10.3390/bioengineering8120204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 11/17/2022] Open
Abstract
Culture platform surface topography plays an important role in the regulation of biological cell behaviour. Understanding the mechanisms behind the roles of surface topography in cell response are central to many developments in a Lab on a Chip, medical implants and biosensors. In this work, we report on a novel development of a biocompatible conductive hydrogel (CH) made of poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and gelatin with bioimprinted surface features. The bioimprinted CH offers high conductivity, biocompatibility and high replication fidelity suitable for cell culture applications. The bioimprinted conductive hydrogel is developed to investigate biological cells’ response to their morphological footprint and study their growth, adhesion, cell–cell interactions and proliferation as a function of conductivity. Moreover, optimization of the conductive hydrogel mixture plays an important role in achieving high imprinting resolution and conductivity. The reason behind choosing a conducive hydrogel with high resolution surface bioimprints is to improve cell monitoring while mimicking cells’ natural physical environment. Bioimprints which are a 3D replication of cellular morphology have previously been shown to promote cell attachment, proliferation, differentiation and even cell response to drugs. The conductive substrate, on the other hand, enables cell impedance to be measured and monitored, which is indicative of cell viability and spread. Two dimensional profiles of the cross section of a single cell taken via Atomic Force Microscopy (AFM) from the fixed cell on glass, and its replicas on polydimethylsiloxane (PDMS) and conductive hydrogel (CH) show unprecedented replication of cellular features with an average replication fidelity of more than 90%. Furthermore, crosslinking CH films demonstrated a significant increase in electrical conductivity from 10−6 S/cm to 1 S/cm. Conductive bioimprints can provide a suitable platform for biosensing applications and potentially for monitoring implant-tissue reactions in medical devices.
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29
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Ni B, Liu G, Zhang M, Tatoulian M, Keller P, Li MH. Customizable Sophisticated Three-Dimensional Shape Changes of Large-Size Liquid Crystal Elastomer Actuators. ACS Appl Mater Interfaces 2021; 13:54439-54446. [PMID: 34738782 DOI: 10.1021/acsami.1c18424] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Stimuli-responsive liquid crystal elastomers (LCEs), which exhibit sophisticated and versatile shape variations and functions upon stimulations, have constantly interested material science researchers. To date, many challenges still exist in scaling up orientated LCEs with sophisticated physical shapes and multi-functions. Herein, LCEs with various customizable conventional and exotic three-dimensional (3D) shapes and with sizes larger than those previously reported have been prepared by combining magnetic field alignment and soft lithography technology. These LCEs have film, cylinder, ellipsoid, hemispheroid, tube, pyramid, triangle and rectangle frame, grid pattern, cubic frame, and spring shapes. Meanwhile, diversified deformation behaviors such as contraction, expansion, bending, and twisting have been achieved by effectively controlling the alignment directions. Finally, the LCE actuator with hemispheroid shape has been explored for its possible applications in dynamic Braille displays or lenses with adjustable focal length. The simple strategy reported here provides a convenient way to customize multimorphological large-size 3D LCE actuators and their stimuli-responsive deformations. These systems will considerably enlarge the potential applications of LCEs and benefit the development of LCE soft robots and the future special bionic systems.
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Affiliation(s)
- Bin Ni
- CNRS, Institut de Recherche de Chimie Paris, UMR8247, Chimie ParisTech, Université Paris Sciences & Lettres, 75005 Paris, France
| | - Gaoyu Liu
- CNRS, Institut de Recherche de Chimie Paris, UMR8247, Chimie ParisTech, Université Paris Sciences & Lettres, 75005 Paris, France
| | - Mengxue Zhang
- CNRS, Institut de Recherche de Chimie Paris, UMR8247, Chimie ParisTech, Université Paris Sciences & Lettres, 75005 Paris, France
| | - Michael Tatoulian
- CNRS, Institut de Recherche de Chimie Paris, UMR8247, Chimie ParisTech, Université Paris Sciences & Lettres, 75005 Paris, France
| | - Patrick Keller
- Institut Curie, Université Paris Sciences & Lettres, CNRS, Sorbonne Université, Laboratoire Physico-Chimie Curie, UMR168, 75005 Paris, France
| | - Min-Hui Li
- CNRS, Institut de Recherche de Chimie Paris, UMR8247, Chimie ParisTech, Université Paris Sciences & Lettres, 75005 Paris, France
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30
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Amadeo F, Mukherjee P, Gao H, Zhou J, Papautsky I. Polycarbonate Masters for Soft Lithography. Micromachines (Basel) 2021; 12:1392. [PMID: 34832803 PMCID: PMC8622653 DOI: 10.3390/mi12111392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/08/2021] [Accepted: 11/11/2021] [Indexed: 11/20/2022]
Abstract
Fabrication of microfluidic devices by soft lithography is by far the most popular approach due to its simplicity and low cost. The approach relies on casting of elastomers, such as polydimethylsiloxane (PDMS), on masters fabricated from photoresists on silicon substrates. These masters, however, can be expensive, complicated to fabricate, and fragile. Here we describe an optimized replica molding approach to preserve the original masters by heat molding of polycarbonate (PC) sheets on PDMS molds. The process is faster and simpler than previously reported methods and does not result in a loss of resolution or aspect ratio for the features. The generated PC masters were used to successfully replicate a wide range of microfluidic devices, including rectangular channels with aspect ratios from 0.025 to 7.3, large area spiral channels, and micropost arrays with 5 µm spacing. Moreover, fabrication of rounded features, such as semi-spherical microwells, was possible and easy. Quantitative analysis of the replicated features showed variability of <2%. The approach is low cost, does not require cleanroom setting or hazardous chemicals, and is rapid and simple. The fabricated masters are rigid and survive numerous replication cycles. Moreover, damaged or missing masters can be easily replaced by reproduction from previously cast PDMS replicas. All of these advantages make the PC masters highly desirable for long-term preservation of soft lithography masters for microfluidic devices.
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Affiliation(s)
| | | | | | | | - Ian Papautsky
- Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA; (F.A.); (P.M.); (H.G.); (J.Z.)
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31
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Liu X, Li M, Bian J, Du J, Li B, Fan B. A Novel Fabricating Method of Micro Lens-on-Lens Arrays with Two Focal Lengths. Micromachines (Basel) 2021; 12:1372. [PMID: 34832784 DOI: 10.3390/mi12111372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 10/30/2021] [Accepted: 11/04/2021] [Indexed: 11/17/2022]
Abstract
Micro lens-on-lens array (MLLA) is a novel 3D structure with unique optical properties that cannot be fabricated accurately and quickly by existing processing methods. In this paper, a new fabricating method of MLLAs with two focal lengths is proposed. By introducing the soft lithography technology, nano-imprint technology and mask alignment exposure technology, MLLAs with high precisions can be obtained. A MLLA is successfully fabricated with two focal lengths of 58 μm and 344 μm, and an experiment is carried out. The results show that the MLLA has excellent two-level focusing and imaging abilities. Furthermore, the fabricated profiles of the MLLA agree well with the designed profiles, and the morphology deviation of the MLLA is better than 2%, satisfying the application requirements. The results verify the feasibility and validity of the novel fabricating method. By adjusting mask patterns and processing parameters, MLLAs with both changeable sizes and focal lengths can be obtained.
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32
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Abstract
Microscopic lasers represent a promising tool for the development of cutting-edge photonic devices thanks to their ability to enhance light-matter interaction at the microscale. In this work, we realize liquid microlasers with tunable emission by exploiting the self-formation of three-dimensional liquid droplets into a polymeric matrix driven by viscoelastic dewetting. We design a flexible device to be used as a smart photonic label which is detachable and reusable on various types of substrates such as paper or fabric. The innovative lasing emission mechanism proposed here is based on whispering gallery mode emission coupled to random lasing, the latter prompted by the inclusion of dielectric compounds into the active gain medium. The wide possibility of modulating the emission wavelength of the microlasers by acting on different parameters, such as the cavity size, type and volume fraction of the dielectrics, and gain medium, offers a multitude of spectroscopic encoding schemes for the realization of photonic barcodes and labels to be employed in anticounterfeiting applications and multiplexed bioassays.
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Affiliation(s)
- A. Capocefalo
- CNR
ISC, Istituto dei Sistemi Complessi, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - E. Quintiero
- CNR
NANOTEC, Istituto di Nanotecnologia, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - C. Conti
- CNR
ISC, Istituto dei Sistemi Complessi, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - N. Ghofraniha
- CNR
ISC, Istituto dei Sistemi Complessi, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - I. Viola
- CNR
NANOTEC, Istituto di Nanotecnologia, c/o Università Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
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33
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Najafi Sani H, Abrinia K, Haghighipour N, George D, Remond Y, Baniassadi M. A Microfabrication Method of PCL Scaffolds for Tissue Engineering by Simultaneous Two PDMS Molds Replication. ACS Biomater Sci Eng 2021; 7:4763-4778. [PMID: 34515461 DOI: 10.1021/acsbiomaterials.1c00651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Not very far away, "tissue engineering" will become one of the most important branches of medical science for curing many types of diseases. This branch needs the cooperation of a wide range of sciences like medicine, chemistry, cellular biology, and genetic and mechanical engineering. Different parameters affect the final produced tissue, but the most important one is the quality and biocompatibility of the scaffold with the desired tissue which can provide the functionality of "native ECM" as well. The quality of the scaffold is directly dependent on its materials, design, and method of fabrication. As to the design and fabrication, there are two main categories: (a) random microporosity such as phase separation, electrospinning, and fused deposition modeling (3D printing) and (b) designed microporosity mostly achievable by stereo lithography and soft lithography. The method of fabrication implemented in this research is a novel method in soft lithography employing a type of "replica molding" with one pair of polydimethylsiloxane (PDMS) molds in contrast to traditional replica molding with just one single mold. In this operation, the solution of polycaprolactone in chloroform is initially prepared, and one droplet of the solution is placed between the molds while a preset pressure is applied to maintain the molds tightly together during the solidification of the polymer layer and vaporization of the solvent. Thus, a perfect warp and woof pattern is created. In this research, it has been approved that this is a feasible method for creating complex patterns and simple straight fiber patterns with different spacings and pore sizes. Cell attachment and migration was studied to find the optimum pore size. It was shown that the small pore size improves the cells' adhesion while reducing cell migration capability within the scaffold.
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Affiliation(s)
- Hassan Najafi Sani
- University of Tehran, School of Mechanical Engineering, College of Engineering, Tehran 1417935840, Islamic Republic of Iran
| | - Karen Abrinia
- University of Tehran, School of Mechanical Engineering, College of Engineering, Tehran 1417935840, Islamic Republic of Iran
| | | | - Daniel George
- University of Strasbourg, CNRS, ICUBE Laboratory, 67000 Strasbourg, France
| | - Yves Remond
- University of Strasbourg, CNRS, ICUBE Laboratory, 67000 Strasbourg, France
| | - Majid Baniassadi
- University of Tehran, School of Mechanical Engineering, College of Engineering, Tehran 1417935840, Islamic Republic of Iran
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Park S, Huang NWY, Wong CXY, Pan J, Albakr L, Gu J, Kang L. Microstructured Hyaluronic Acid Hydrogel for Tooth Germ Bioengineering. Gels 2021; 7:123. [PMID: 34449604 DOI: 10.3390/gels7030123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/07/2021] [Accepted: 08/11/2021] [Indexed: 12/30/2022] Open
Abstract
Tooth loss has been found to adversely affect not just masticatory and speech functions, but also psychological health and quality of life. Currently, teeth replacement options include dentures, bridges, and implants. However, these artificial replacement options remain inferior to biological replacements due to their reduced efficiency, the need for replacements, and the risk of immunological rejection. To this end, there has been a heightened interest in the bioengineering of teeth in recent years. While there have been reports of successfully regenerated teeth, controlling the size and shape of bioengineered teeth remains a challenge. In this study, methacrylated hyaluronic acid (MeHA) was synthesized and microstructured in a hydrogel microwell array using soft lithography. The resulting MeHA hydrogel microwell scaffold resembles the shape of a naturally developing human tooth germ. To facilitate the epithelial-mesenchymal interactions, human adult low calcium high temperature (HaCaT) cells were seeded on the surface of the hydrogels and dental pulp stem cells (DPSCs) were encapsulated inside the hydrogels. It was found that hydrogel scaffolds were able to preserve the viability of both types of cells and they appeared to favor signaling between epithelial and mesenchymal cells, which is necessary in the promotion of cell proliferation. As such, the hydrogel scaffolds offer a promising system for the bioengineering of human tooth germs in vitro.
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Miller DR, Schaffer DK, Neely MD, McClain ES, Travis AR, Block FE, Mckenzie J, Werner EM, Armstrong L, Markov DA, Bowman AB, Ess KC, Cliffel DE, Wikswo JP. A bistable, multiport valve enables microformulators creating microclinical analyzers that reveal aberrant glutamate metabolism in astrocytes derived from a tuberous sclerosis patient. Sens Actuators B Chem 2021; 341:129972. [PMID: 34092923 PMCID: PMC8174775 DOI: 10.1016/j.snb.2021.129972] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
There is a need for valves and pumps that operate at the microscale with precision and accuracy, are versatile in their application, and are easily fabricated. To that end, we developed a new rotary planar multiport valve to faithfully select solutions (contamination = 5.22 ± 0.06 ppb) and a rotary planar peristaltic pump to precisely control fluid delivery (flow rate = 2.4 ± 1.7 to 890 ± 77 μL/min). Both the valve and pump were implemented in a planar format amenable to single-layer soft lithographic fabrication. These planar microfluidics were actuated by a rotary motor controlled remotely by custom software. Together, these two devices constitute an innovative microformulator that was used to prepare precise, high-fidelity mixtures of up to five solutions (deviation from prescribed mixture = ±|0.02 ± 0.02| %). This system weighed less than a kilogram, occupied around 500 cm3, and generated pressures of 255 ± 47 kPa. This microformulator was then combined with an electrochemical sensor creating a microclinical analyzer (μCA) for detecting glutamate in real time. Using the chamber of the μCA as an in-line bioreactor, we compared glutamate homeostasis in human astrocytes differentiated from human-induced pluripotent stem cells (hiPSCs) from a control subject (CC-3) and a Tuberous Sclerosis Complex (TSC) patient carrying a pathogenic TSC2 mutation. When challenged with glutamate, TSC astrocytes took up less glutamate than control cells. These data validate the analytical power of the μCA and the utility of the microformulator by leveraging it to assess disease-related alterations in cellular homeostasis.
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Affiliation(s)
- Dusty R. Miller
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - David K. Schaffer
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN 37235, U.S.A
- Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - M. Diana Neely
- Department of Pediatrics, Vanderbilt University Medical Center, 1211 Medical Center Dr., Nashville, TN 37232, U.S.A
| | - Ethan S. McClain
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Adam R. Travis
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Frank E. Block
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Jennifer Mckenzie
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Erik M. Werner
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Laura Armstrong
- Department of Pediatrics, Vanderbilt University Medical Center, 1211 Medical Center Dr., Nashville, TN 37232, U.S.A
| | - Dmitry A. Markov
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN 37235, U.S.A
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - Aaron B. Bowman
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232, U.S.A
- School of Health Sciences, Purdue University, West Lafayette, IN 47907, U.S.A
| | - Kevin C. Ess
- Department of Pediatrics, Vanderbilt University Medical Center, 1211 Medical Center Dr., Nashville, TN 37232, U.S.A
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232, U.S.A
| | - David E. Cliffel
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - John P. Wikswo
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, TN 37235, U.S.A
- Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, U.S.A
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, U.S.A
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37240, U.S.A
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Khan A, Smith NM, Tullier MP, Roberts BS, Englert D, Pojman JA, Melvin AT. Development of a Flow-free Gradient Generator Using a Self-Adhesive Thiol-acrylate Microfluidic Resin/Hydrogel (TAMR/H) Hybrid System. ACS Appl Mater Interfaces 2021; 13:26735-26747. [PMID: 34081856 PMCID: PMC8289190 DOI: 10.1021/acsami.1c04771] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Microfluidic gradient generators have been used to study cellular migration, growth, and drug response in numerous biological systems. One type of device combines a hydrogel and polydimethylsiloxane (PDMS) to generate "flow-free" gradients; however, their requirements for either negative flow or external clamps to maintain fluid-tight seals between the two layers have restricted their utility among broader applications. In this work, a two-layer, flow-free microfluidic gradient generator was developed using thiol-ene chemistry. Both rigid thiol-acrylate microfluidic resin (TAMR) and diffusive thiol-acrylate hydrogel (H) layers were synthesized from commercially available monomers at room temperature and pressure using a base-catalyzed Michael addition. The device consisted of three parallel microfluidic channels negatively imprinted in TAMR layered on top of the thiol-acrylate hydrogel to facilitate orthogonal diffusion of chemicals to the direction of flow. Upon contact, these two layers formed fluid-tight channels without any external pressure due to a strong adhesive interaction between the two layers. The diffusion of molecules through the TAMR/H system was confirmed both experimentally (using fluorescent microscopy) and computationally (using COMSOL). The performance of the TAMR/H system was compared to a conventional PDMS/agarose device with a similar geometry by studying the chemorepulsive response of a motile strain of GFP-expressing Escherichia coli. Population-based analysis confirmed a similar migratory response of both wild-type and mutant E. coli in both of the microfluidic devices. This confirmed that the TAMR/H hybrid system is a viable alternative to traditional PDMS-based microfluidic gradient generators and can be used for several different applications.
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Affiliation(s)
- Anowar
H. Khan
- Department
of Chemistry, Louisiana State University, Baton Rouge 70803, Louisiana, United States
| | - Noah Mulherin Smith
- Cain
Department of Chemical Engineering, Louisiana
State University, Baton Rouge 70803, Louisiana, United States
| | - Michael P. Tullier
- Department
of Chemistry, Louisiana State University, Baton Rouge 70803, Louisiana, United States
| | - B. Seth Roberts
- Cain
Department of Chemical Engineering, Louisiana
State University, Baton Rouge 70803, Louisiana, United States
| | - Derek Englert
- Chemical
and Materials Engineering, University of
Kentucky, Paducah 42002, Kentucky, United States
| | - John A. Pojman
- Department
of Chemistry, Louisiana State University, Baton Rouge 70803, Louisiana, United States
| | - Adam T. Melvin
- Cain
Department of Chemical Engineering, Louisiana
State University, Baton Rouge 70803, Louisiana, United States
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Mukhopadhyay A, Das A, Mukherjee S, Rajput M, Gope A, Chaudhary A, Choudhury K, Barui A, Chatterjee J, Mukherjee R. Improved Mesenchymal Stem Cell Proliferation, Differentiation, Epithelial Transition, and Restrained Senescence on Hierarchically Patterned Porous Honey Silk Fibroin Scaffolds. ACS Appl Bio Mater 2021; 4:4328-4344. [PMID: 35006845 DOI: 10.1021/acsabm.1c00115] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report a significant improvement of adipose-derived mesenchymal stem cells' (ADMSCs) biocompatibility and proliferation on hierarchically patterned porous honey-incorporated silk fibroin scaffolds fabricated using a combination of soft lithography and freeze-drying techniques. Parametric variations show enhanced surface roughness, swelling, and degradation rate with good pore interconnectivity, porosity, and mechanical strength for soft-lithographically fabricated biomimetic microdome arrays on the 2% honey silk fibroin scaffold (PHSF2) as compared to its other variants, which eventually made PHSF2 more comparable to the native environment required for stem cell adhesion and proliferation. PHSF2 also exhibits sustained honey release with remarkable antibacterial efficacy against methicillin-resistant Staphylococcus aureus (MRSA). Honey incorporation (biochemical cue) influences microdome structural features, that is, biophysical cues (height, width, and periodicity), which further allows ADMSCs pseudopods (filopodia) to grasp the microdomes for efficient cell-cell communication and cell-matrix interaction and regulates ADMSCs behavior by altering their cytoskeletal rearrangement and thereby increases the cellular spreading area and cell sheet formation. The synergistic effect of biochemical (honey) and biophysical (patterns) cues on ADMSCs studied by the nitro blue tetrazolium assay and DCFDA fluorescence spectroscopy reveals limited free radical generation within cells. Molecular expression studies show a decrease in p53 and p21 expressions validating ADMSCs senescence inhibition, which is further correlated with a decrease in cellular senescence-associated β galactosidase activity. We also show that an increase in CDH1 and CK19 molecular expressions along with an increase in SOX9, RUNX2, and PPARγ molecular expressions supported by PHSF2 justify the substrate's efficacy of underpinning mesenchymal to epithelial transition and multilineage trans-differentiation. This work highlights the fabrication of a naturally healing nutraceutical (honey)-embedded patterned porous stand-alone tool with the potential to be used as smart stem cells delivering regenerative healing implant.
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Affiliation(s)
- Anurup Mukhopadhyay
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Ankita Das
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Suranjana Mukherjee
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Monika Rajput
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.,Biomaterials and Tissue Engineering Laboratory, Department of Materials Engineering, Indian Institute of Science Bangalore, Bengaluru, Karnataka 560012, India
| | - Ayan Gope
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Amrita Chaudhary
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Kabita Choudhury
- Department of Microbiology, Nil Ratan Sircar Medical College and Hospital, Sealdah, Kolkata, West Bengal 700014, India
| | - Ananya Barui
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Jyotirmoy Chatterjee
- Multimodal Imaging and Theranostics Laboratory, School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Rabibrata Mukherjee
- Instability and Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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Zhao C, Liu Q, Cheung KM, Liu W, Yang Q, Xu X, Man T, Weiss PS, Zhou C, Andrews AM. Narrower Nanoribbon Biosensors Fabricated by Chemical Lift-off Lithography Show Higher Sensitivity. ACS Nano 2021; 15:904-915. [PMID: 33337135 PMCID: PMC7855841 DOI: 10.1021/acsnano.0c07503] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Wafer-scale nanoribbon field-effect transistor (FET) biosensors fabricated by straightforward top-down processes are demonstrated as sensing platforms with high sensitivity to a broad range of biological targets. Nanoribbons with 350 nm widths (700 nm pitch) were patterned by chemical lift-off lithography using high-throughput, low-cost commercial digital versatile disks (DVDs) as masters. Lift-off lithography was also used to pattern ribbons with 2 μm or 20 μm widths (4 or 40 μm pitches, respectively) using masters fabricated by photolithography. For all widths, highly aligned, quasi-one-dimensional (1D) ribbon arrays were produced over centimeter length scales by sputtering to deposit 20 nm thin-film In2O3 as the semiconductor. Compared to 20 μm wide microribbons, FET sensors with 350 nm wide nanoribbons showed higher sensitivity to pH over a broad range (pH 5 to 10). Nanoribbon FETs functionalized with a serotonin-specific aptamer demonstrated larger responses to equimolar serotonin in high ionic strength buffer than those of microribbon FETs. Field-effect transistors with 350 nm wide nanoribbons functionalized with single-stranded DNA showed greater sensitivity to detecting complementary DNA hybridization vs 20 μm microribbon FETs. In all, we illustrate facile fabrication and use of large-area, uniform In2O3 nanoribbon FETs for ion, small-molecule, and oligonucleotide detection where higher surface-to-volume ratios translate to better detection sensitivities.
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Affiliation(s)
- Chuanzhen Zhao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Qingzhou Liu
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Kevin M. Cheung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Wenfei Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Qing Yang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Xiaobin Xu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Tianxing Man
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Paul S. Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Corresponding Authors (AMA), (CZ), and (PSW)
| | - Chongwu Zhou
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States
- Corresponding Authors (AMA), (CZ), and (PSW)
| | - Anne M. Andrews
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, and Hatos Center for Neuropharmacology, University of California, Los Angeles, Los Angeles, California 90095, United States
- Corresponding Authors (AMA), (CZ), and (PSW)
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Kudryavtseva V, Boi S, Read J, Guillemet R, Zhang J, Udalov A, Shesterikov E, Tverdokhlebov S, Pastorino L, Gould DJ, Sukhorukov GB. Biodegradable Defined Shaped Printed Polymer Microcapsules for Drug Delivery. ACS Appl Mater Interfaces 2021; 13:2371-2381. [PMID: 33404209 DOI: 10.1021/acsami.0c21607] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This work describes the preparation and characterization of printed biodegradable polymer (polylactic acid) capsules made in two different shapes: pyramid and rectangular capsules about 1 and 11 μm in size. Obtained core-shell capsules are described in terms of their morphology, loading efficiency, cargo release profile, cell cytotoxicity, and cell uptake. Both types of capsules showed monodisperse size and shape distribution and were found to provide sufficient stability to encapsulate small water-soluble molecules and to retain them for several days and ability for intracellular delivery. Capsules of 1 μm size can be internalized by HeLa cells without causing any toxicity effect. Printed capsules show unique characteristics compared with other drug delivery systems such as a wide range of possible cargoes, triggered release mechanism, and highly controllable shape and size.
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Affiliation(s)
- Valeriya Kudryavtseva
- Nanoforce Technology Ltd, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom
- National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russian Federation
| | - Stefania Boi
- Department of Informatics, Bioengineering, Robotics and Systems Engineering, University of Genoa, Via all'Opera Pia 13, 16145 Genoa, Italy
| | - Jordan Read
- Biochemical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Raphael Guillemet
- THALES Research & Technology, 1 Avenue Augustin Fresnel, 91767 Palaiseau, France
| | - Jiaxin Zhang
- Nanoforce Technology Ltd, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom
| | - Andrei Udalov
- V.E. Zuev Institute of Atmospheric Optics SB RAS, 1 Academician Zuev Square, Tomsk 634055, Russian Federation
| | - Evgeny Shesterikov
- National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russian Federation
- V.E. Zuev Institute of Atmospheric Optics SB RAS, 1 Academician Zuev Square, Tomsk 634055, Russian Federation
- Tomsk State University of Control Systems and Radioelectronics, 40 Lenin Avenue, Tomsk 634050, Russian Federation
| | - Sergei Tverdokhlebov
- National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk 634050, Russian Federation
| | - Laura Pastorino
- Department of Informatics, Bioengineering, Robotics and Systems Engineering, University of Genoa, Via all'Opera Pia 13, 16145 Genoa, Italy
| | - David J Gould
- Biochemical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Gleb B Sukhorukov
- Nanoforce Technology Ltd, School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, Bld. 1, Moscow 143025, Russian Federation
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Lochmann S, Kintzel S, Bräuniger Y, Otto T, Zhang E, Grothe J, Kaskel S. Green Precursors and Soft Templating for Printing Porous Carbon-Based Micro-supercapacitors. Chemistry 2021; 27:1356-1363. [PMID: 32881100 PMCID: PMC7898350 DOI: 10.1002/chem.202003124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/31/2020] [Indexed: 11/07/2022]
Abstract
A combination of soft lithographic printing and soft templating has been used to fabricate high-resolution interdigitated micro-supercapacitors (MSC). Surfactant-assisted self-assembly produces high surface area ordered mesoporous carbons (490 m2 g-1 ). For the first time, such precursors have been printed by nano-imprint lithography as microdevices with a line width of only 250 nm and a spacing of only 1 μm. The devices are crack-free with low specific resistance (1.2×10-5 Ωm) and show good device capacitance up to 0.21 F cm-3 .
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Affiliation(s)
- Stefanie Lochmann
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - Susann Kintzel
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - Yannik Bräuniger
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - Thomas Otto
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - En Zhang
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - Julia Grothe
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
| | - Stefan Kaskel
- Chemistry and Food ChemistryInorganic Chemistry IBergstraße 6601159DresdenGermany
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Bianchi E, Ruggeri M, Rossi S, Vigani B, Miele D, Bonferoni MC, Sandri G, Ferrari F. Innovative Strategies in Tendon Tissue Engineering. Pharmaceutics 2021; 13:89. [PMID: 33440840 PMCID: PMC7827834 DOI: 10.3390/pharmaceutics13010089] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/31/2020] [Accepted: 01/08/2021] [Indexed: 12/15/2022] Open
Abstract
The tendon is a highly aligned connective tissue that transmits force from muscle to bone. Each year, more than 32 million tendon injuries have been reported, in fact, tendinopathies represent at least 50% of all sports injuries, and their incidence rates have increased in recent decades due to the aging population. Current clinical grafts used in tendon treatment are subject to several restrictions and there is a significant demand for alternative engineered tissue. For this reason, innovative strategies need to be explored. Tendon replacement and regeneration are complex since scaffolds need to guarantee an adequate hierarchical structured morphology and mechanical properties to stand the load. Moreover, to guide cell proliferation and growth, scaffolds should provide a fibrous network that mimics the collagen arrangement of the extracellular matrix in the tendons. This review focuses on tendon repair and regeneration. Particular attention has been devoted to the innovative approaches in tissue engineering. Advanced manufacturing techniques, such as electrospinning, soft lithography, and three-dimensional (3D) printing, have been described. Furthermore, biological augmentation has been considered, as an emerging strategy with great therapeutic potential.
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Affiliation(s)
| | | | | | | | | | | | - Giuseppina Sandri
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy; (E.B.); (M.R.); (S.R.); (B.V.); (D.M.); (M.C.B.); (F.F.)
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Petersen RS, Boisen A, Keller SS. Micromechanical Punching: A Versatile Method for Non-Spherical Microparticle Fabrication. Polymers (Basel) 2020; 13:E83. [PMID: 33379323 PMCID: PMC7795128 DOI: 10.3390/polym13010083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 11/21/2022] Open
Abstract
Microparticles are ubiquitous in applications ranging from electronics and drug delivery to cosmetics and food. Conventionally, non-spherical microparticles in various materials with specific shapes, sizes, and physicochemical properties have been fabricated using cleanroom-free lithography techniques such as soft lithography and its high-resolution version particle replication in non-wetting template (PRINT). These methods process the particle material in its liquid/semi-liquid state by deformable molds, limiting the materials from which the particles and the molds can be fabricated. In this study, the microparticle material is exploited as a sheet placed on a deformable substrate, punched by a robust mold. Drawing inspiration from the macro-manufacturing technique of punching metallic sheets, Micromechanical Punching (MMP) is a high-throughput technique for fabrication of non-spherical microparticles. MMP allows production of microparticles from prepatterned, porous, and fibrous films, constituting thermoplastics and thermosetting polymers. As an illustration of application of MMP in drug delivery, flat, microdisk-shaped Furosemide embedded poly(lactic-co-glycolic acid) microparticles are fabricated and Furosemide release is observed. Thus, it is shown in the paper that Micromechanical punching has potential to make micro/nanofabrication more accessible to the research and industrial communities active in applications that require engineered particles.
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Affiliation(s)
- Ritika Singh Petersen
- DNRF and Villum Fonden Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, IDUN, DTU Health Technology, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark; (A.B.); (S.S.K.)
- National Centre of Nano Fabrication and Characterization, DTU Nanolab, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Anja Boisen
- DNRF and Villum Fonden Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, IDUN, DTU Health Technology, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark; (A.B.); (S.S.K.)
- Department of Health Technology, DTU Health Tech, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Stephan Sylvest Keller
- DNRF and Villum Fonden Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, IDUN, DTU Health Technology, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark; (A.B.); (S.S.K.)
- National Centre of Nano Fabrication and Characterization, DTU Nanolab, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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Jang HI, Yoon HS, Lee TI, Lee S, Kim TS, Shim J, Park JH. Creation of Curved Nanostructures Using Soft-Materials-Derived Lithography. Nanomaterials (Basel) 2020; 10:nano10122414. [PMID: 33287131 PMCID: PMC7761667 DOI: 10.3390/nano10122414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/28/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
In this study, curved nanostructures, which are difficult to obtain, were created on an Si substrate through the bonding, swelling, and breaking processes of the polymer and silicone substrate. This method can be utilized to obtain convex nanostructures over large areas. The method is simpler than typical semiconductor processing with photolithography or compared to wet- or vacuum-based dry etching processes. The polymer bonding, swelling (or no swelling), and breaking processes that are performed in this process were theoretically analyzed through a numerical analysis of permeability and modeling. Through this process, we designed a convex nanostructure that can be produced experimentally in an accurate manner.
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Affiliation(s)
- Hyun-Ik Jang
- National NanoFab Center, 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea; (H.-I.J.); (H.-S.Y.)
- Nanoin Inc., 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea
| | - Hae-Su Yoon
- National NanoFab Center, 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea; (H.-I.J.); (H.-S.Y.)
- Nanoin Inc., 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea
| | - Tae-Ik Lee
- Joining R&D Group, KITECH, 156 Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Korea;
| | - Sangmin Lee
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea; (S.L.); (T.-S.K.)
| | - Taek-Soo Kim
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea; (S.L.); (T.-S.K.)
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk 38541, Korea
| | - Jae Hong Park
- National NanoFab Center, 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea; (H.-I.J.); (H.-S.Y.)
- Nanoin Inc., 291 Daehak-ro, Yuseong-gu, Deajeon 34141, Korea
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44
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Shiwarski DJ, Tashman JW, Tsamis A, Bliley JM, Blundon MA, Aranda-Michel E, Jallerat Q, Szymanski JM, McCartney BM, Feinberg AW. Fibronectin-based nanomechanical biosensors to map 3D surface strains in live cells and tissue. Nat Commun 2020; 11:5883. [PMID: 33208732 PMCID: PMC7675982 DOI: 10.1038/s41467-020-19659-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 10/19/2020] [Indexed: 01/07/2023] Open
Abstract
Mechanical forces are integral to cellular migration, differentiation and tissue morphogenesis; however, it has proved challenging to directly measure strain at high spatial resolution with minimal perturbation in living sytems. Here, we fabricate, calibrate, and test a fibronectin (FN)-based nanomechanical biosensor (NMBS) that can be applied to the surface of cells and tissues to measure the magnitude, direction, and strain dynamics from subcellular to tissue length-scales. The NMBS is a fluorescently-labeled, ultra-thin FN lattice-mesh with spatial resolution tailored by adjusting the width and spacing of the lattice from 2-100 µm. Time-lapse 3D confocal imaging of the NMBS demonstrates 2D and 3D surface strain tracking during mechanical deformation of known materials and is validated with finite element modeling. Analysis of the NMBS applied to single cells, cell monolayers, and Drosophila ovarioles highlights the NMBS's ability to dynamically track microscopic tensile and compressive strains across diverse biological systems where forces guide structure and function.
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Affiliation(s)
- Daniel J Shiwarski
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Joshua W Tashman
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Alkiviadis Tsamis
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Jaci M Bliley
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Malachi A Blundon
- Department of Biology, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Edgar Aranda-Michel
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Quentin Jallerat
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - John M Szymanski
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Brooke M McCartney
- Department of Biology, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Adam W Feinberg
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
- Department of Materials Science & Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
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45
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Abstract
Fabrication of bio-templated metallic structures is limited by differences in properties, processing conditions, packing, and material state(s). Herein, by using undercooled metal particles, differences in modulus and processing temperatures can be overcome. Adoption of autonomous processes such as self-filtration, capillary pressure, and evaporative concentration leads to enhanced packing, stabilization (jamming) and point sintering with phase change to create solid metal replicas of complex bio-based features. Differentiation of subtle differences between cultivars of the rose flower with reproduction over large areas shows that this biomimetic metal patterning (BIOMAP) is a versatile method to replicate biological features either as positive or negative reliefs irrespective of the substrate. Using rose petal patterns, we illustrate the versatility of bio-templated mapping with undercooled metal particles at ambient conditions, and with unprecedented efficiency for metal structures.
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Affiliation(s)
- Julia J Chang
- Iowa State University, Department of Materials Science and Engineering, Ames, IA, 50014, USA
| | - Andrew Martin
- Iowa State University, Department of Materials Science and Engineering, Ames, IA, 50014, USA
| | - Chuanshen Du
- Iowa State University, Department of Materials Science and Engineering, Ames, IA, 50014, USA
| | - Alana M Pauls
- Iowa State University, Department of Materials Science and Engineering, Ames, IA, 50014, USA
| | - Martin Thuo
- Iowa State University, Department of Materials Science and Engineering, Ames, IA, 50014, USA.,Micro-Electronics Research Centre, Ames, IA, 50014, USA.,Iowa State University, Department of Electrical and Computer Engineering, Ames, IA, 50014, USA
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46
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Kajtez J, Buchmann S, Vasudevan S, Birtele M, Rocchetti S, Pless CJ, Heiskanen A, Barker RA, Martínez‐Serrano A, Parmar M, Lind JU, Emnéus J. 3D-Printed Soft Lithography for Complex Compartmentalized Microfluidic Neural Devices. Adv Sci (Weinh) 2020; 7:2001150. [PMID: 32832365 PMCID: PMC7435242 DOI: 10.1002/advs.202001150] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/16/2020] [Indexed: 05/18/2023]
Abstract
Compartmentalized microfluidic platforms are an invaluable tool in neuroscience research. However, harnessing the full potential of this technology remains hindered by the lack of a simple fabrication approach for the creation of intricate device architectures with high-aspect ratio features. Here, a hybrid additive manufacturing approach is presented for the fabrication of open-well compartmentalized neural devices that provides larger freedom of device design, removes the need for manual postprocessing, and allows an increase in the biocompatibility of the system. Suitability of the method for multimaterial integration allows to tailor the device architecture for the long-term maintenance of healthy human stem-cell derived neurons and astrocytes, spanning at least 40 days. Leveraging fast-prototyping capabilities at both micro and macroscale, a proof-of-principle human in vitro model of the nigrostriatal pathway is created. By presenting a route for novel materials and unique architectures in microfluidic systems, the method provides new possibilities in biological research beyond neuroscience applications.
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Affiliation(s)
- Janko Kajtez
- Department of Experimental Medical SciencesWallenberg Neuroscience CenterDivision of Neurobiology and Lund Stem Cell CenterBMC A11Lund UniversityLundS‐22184Sweden
| | - Sebastian Buchmann
- Department of Biotechnology and Biomedicine (DTU Bioengineering)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Shashank Vasudevan
- Department of Biotechnology and Biomedicine (DTU Bioengineering)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Marcella Birtele
- Department of Experimental Medical SciencesWallenberg Neuroscience CenterDivision of Neurobiology and Lund Stem Cell CenterBMC A11Lund UniversityLundS‐22184Sweden
| | - Stefano Rocchetti
- Department of Biotechnology and Biomedicine (DTU Bioengineering)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Christian Jonathan Pless
- Department of Healthcare Technology (DTU Health Tech)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Arto Heiskanen
- Department of Biotechnology and Biomedicine (DTU Bioengineering)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Roger A. Barker
- John van Geest Centre for Brain Repair & Department of NeurologyDepartment of Clinical Neurosciences and WT‐MRC Cambridge Stem Cell InstituteUniversity of CambridgeCambridgeCB2 1TNUK
| | - Alberto Martínez‐Serrano
- Department of Molecular BiologyUniversidad Autónoma de Madridand Department of Molecular NeuropathologyCenter of Molecular Biology Severo Ochoa (UAM‐CSIC)Nicolás Cabrera 1Madrid28049Spain
| | - Malin Parmar
- Department of Experimental Medical SciencesWallenberg Neuroscience CenterDivision of Neurobiology and Lund Stem Cell CenterBMC A11Lund UniversityLundS‐22184Sweden
| | - Johan Ulrik Lind
- Department of Healthcare Technology (DTU Health Tech)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
| | - Jenny Emnéus
- Department of Biotechnology and Biomedicine (DTU Bioengineering)Technical University of DenmarkProduktionstorvet, Building 423Lyngby2800 Kgs.Denmark
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47
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Lu R, Soden PA, Lee E. Tissue-Engineered Models for Glaucoma Research. Micromachines (Basel) 2020; 11:mi11060612. [PMID: 32599818 PMCID: PMC7345325 DOI: 10.3390/mi11060612] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 12/20/2022]
Abstract
Glaucoma is a group of optic neuropathies characterized by the progressive degeneration of retinal ganglion cells (RGCs). Patients with glaucoma generally experience elevations in intraocular pressure (IOP), followed by RGC death, peripheral vision loss and eventually blindness. However, despite the substantial economic and health-related impact of glaucoma-related morbidity worldwide, the surgical and pharmacological management of glaucoma is still limited to maintaining IOP within a normal range. This is in large part because the underlying molecular and biophysical mechanisms by which glaucomatous changes occur are still unclear. In the present review article, we describe current tissue-engineered models of the intraocular space that aim to advance the state of glaucoma research. Specifically, we critically evaluate and compare both 2D and 3D-culture models of the trabecular meshwork and nerve fiber layer, both of which are key players in glaucoma pathophysiology. Finally, we point out the need for novel organ-on-a-chip models of glaucoma that functionally integrate currently available 3D models of the retina and the trabecular outflow pathway.
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Affiliation(s)
- Renhao Lu
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA;
| | - Paul A. Soden
- College of Human Ecology, Cornell University, Ithaca, NY 14853, USA;
| | - Esak Lee
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA;
- Correspondence: ; Tel.: +1-607-255-8491
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48
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Sonmez UM, Coyle S, Taylor RE, LeDuc PR. Polycarbonate Heat Molding for Soft Lithography. Small 2020; 16:e2000241. [PMID: 32227442 DOI: 10.1002/smll.202000241] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 06/10/2023]
Abstract
Soft lithography enables rapid microfabrication of many types of microsystems by replica molding elastomers into master molds. However, master molds can be very costly, hard to fabricate, vulnerable to damage, and have limited casting life. Here, an approach for the multiplication of master molds into monolithic thermoplastic sheets for further soft lithographic fabrication is introduced. The technique is tested with master molds fabricated through photolithography, mechanical micromilling as well as 3D printing, and the results are demonstrated. Microstructures with submicron feature sizes and high aspect ratios are successfully copied. The copying fidelity of the technique is quantitatively characterized and the microfluidic devices fabricated through this technique are functionally tested. This approach is also used to combine different master molds with up to 19 unique geometries into a single monolithic copy mold in a single step displaying the effectiveness of the copying technique over a large footprint area to scale up the microfabrication. This microfabrication technique can be performed outside the cleanroom without using any sophisticated equipment, suggesting a simple way for high-throughput rigid monolithic mold fabrication that can be used in analytical chemistry studies, biomedical research, and microelectromechanical systems.
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Affiliation(s)
- Utku M Sonmez
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Stephen Coyle
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Rebecca E Taylor
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Philip R LeDuc
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
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49
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Belling JN, Cheung KM, Jackman JA, Sut TN, Allen M, Park JH, Jonas SJ, Cho NJ, Weiss PS. Lipid Bicelle Micropatterning Using Chemical Lift-Off Lithography. ACS Appl Mater Interfaces 2020; 12:13447-13455. [PMID: 32092250 PMCID: PMC7092747 DOI: 10.1021/acsami.9b20617] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Supported lipid membranes are versatile biomimetic coatings for the chemical functionalization of inorganic surfaces. Developing simple and effective fabrication strategies to form supported lipid membranes with micropatterned geometries is a long-standing challenge. Herein, we demonstrate how the combination of chemical lift-off lithography (CLL) and easily prepared lipid bicelle nanostructures can yield micropatterned, supported lipid membranes on gold surfaces with high pattern resolution, conformal character, and biofunctionality. Using CLL, we functionalized gold surfaces with patterned arrays of hydrophilic and hydrophobic self-assembled monolayers (SAMs). Time-lapse fluorescence microscopy imaging revealed that lipid bicelles adsorbed preferentially onto the hydrophilic SAM regions, while there was negligible lipid adsorption onto the hydrophobic SAM regions. Functional receptors could be embedded within the lipid bicelles, which facilitated selective detection of receptor-ligand binding interactions in a model streptavidin-biotin system. Quartz crystal microbalance-dissipation measurements further identified that lipid bicelles adsorb irreversibly and remain intact on top of the hydrophilic SAM regions. Taken together, our findings indicate that lipid bicelles are useful lipid nanostructures for reproducibly assembling micropatterned, supported lipid membranes with precise pattern fidelity.
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Affiliation(s)
- Jason N. Belling
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Kevin M. Cheung
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Joshua A. Jackman
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Tun Naw Sut
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Matthew Allen
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Jae Hyeon Park
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Steven J. Jonas
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095, United States
- Children’s Discovery and Innovation Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Eli & Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Nam-Joon Cho
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Paul S. Weiss
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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50
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Zhao C, Xu X, Ferhan AR, Chiang N, Jackman JA, Yang Q, Liu W, Andrews AM, Cho NJ, Weiss PS. Scalable Fabrication of Quasi-One-Dimensional Gold Nanoribbons for Plasmonic Sensing. Nano Lett 2020; 20:1747-1754. [PMID: 32027140 PMCID: PMC7067626 DOI: 10.1021/acs.nanolett.9b04963] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Plasmonic nanostructures have a wide range of applications, including chemical and biological sensing. However, the development of techniques to fabricate submicrometer-sized plasmonic structures over large scales remains challenging. We demonstrate a high-throughput, cost-effective approach to fabricate Au nanoribbons via chemical lift-off lithography (CLL). Commercial HD-DVDs were used as large-area templates for CLL. Transparent glass slides were coated with Au/Ti films and functionalized with self-assembled alkanethiolate monolayers. Monolayers were patterned with lines via CLL. The lifted-off, exposed regions of underlying Au were selectively etched into large-area grating-like patterns (200 nm line width; 400 nm pitch; 60 nm height). After removal of the remaining monolayers, a thin In2O3 layer was deposited and the resulting gratings were used as plasmonic sensors. Distinct features in the extinction spectra varied in their responses to refractive index changes in the solution environment with a maximum bulk sensitivity of ∼510 nm/refractive index unit. Sensitivity to local refractive index changes in the near-field was also achieved, as evidenced by real-time tracking of lipid vesicle or protein adsorption. These findings show how CLL provides a simple and economical means to pattern large-area plasmonic nanostructures for applications in optoelectronics and sensing.
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Affiliation(s)
- Chuanzhen Zhao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Xiaobin Xu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, & Institute for Advanced Study, Tongji University, Shanghai 201804, China
| | - Abdul Rahim Ferhan
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Naihao Chiang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Joshua A. Jackman
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Qing Yang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Wenfei Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Anne M. Andrews
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, and Hatos Center for Neuropharmacology, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
| | - Paul S. Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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