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Arshavsky-Graham S, Enders A, Ackerman S, Bahnemann J, Segal E. 3D-printed microfluidics integrated with optical nanostructured porous aptasensors for protein detection. Mikrochim Acta 2021; 188:67. [PMID: 33543321 PMCID: PMC7862519 DOI: 10.1007/s00604-021-04725-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/19/2021] [Indexed: 01/13/2023]
Abstract
Microfluidic integration of biosensors enables improved biosensing performance and sophisticated lab-on-a-chip platform design for numerous applications. While soft lithography and polydimethylsiloxane (PDMS)-based microfluidics are still considered the gold standard, 3D-printing has emerged as a promising fabrication alternative for microfluidic systems. Herein, a 3D-printed polyacrylate-based microfluidic platform is integrated for the first time with a label-free porous silicon (PSi)-based optical aptasensor via a facile bonding method. The latter utilizes a UV-curable adhesive as an intermediate layer, while preserving the delicate nanostructure of the porous regions within the microchannels. As a proof-of-concept, a generic model aptasensor for label-free detection of his-tagged proteins is constructed, characterized, and compared to non-microfluidic and PDMS-based microfluidic setups. Detection of the target protein is carried out by real-time monitoring reflectivity changes of the PSi, induced by the target binding to the immobilized aptamers within the porous nanostructure. The microfluidic integrated aptasensor has been successfully used for detection of a model target protein, in the range 0.25 to 18 μM, with a good selectivity and an improved limit of detection, when compared to a non-microfluidic biosensing platform (0.04 μM vs. 2.7 μM, respectively). Furthermore, a superior performance of the 3D-printed microfluidic aptasensor is obtained, compared to a conventional PDMS-based microfluidic platform with similar dimensions.
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Affiliation(s)
- Sofia Arshavsky-Graham
- Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel
- Institute of Technical Chemistry, Leibniz University Hannover, Hanover, Germany
| | - Anton Enders
- Institute of Technical Chemistry, Leibniz University Hannover, Hanover, Germany
| | - Shanny Ackerman
- Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel
| | - Janina Bahnemann
- Institute of Technical Chemistry, Leibniz University Hannover, Hanover, Germany.
| | - Ester Segal
- Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel.
- The Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology, Haifa, Israel.
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52
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Kumar S, Nehra M, Khurana S, Dilbaghi N, Kumar V, Kaushik A, Kim KH. Aspects of Point-of-Care Diagnostics for Personalized Health Wellness. Int J Nanomedicine 2021; 16:383-402. [PMID: 33488077 PMCID: PMC7814661 DOI: 10.2147/ijn.s267212] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/24/2020] [Indexed: 12/24/2022] Open
Abstract
Advancements in analytical diagnostic systems for point-of-care (POC) application have gained considerable attention because of their rapid operation at the site required to manage severe diseases, even in a personalized manner. The POC diagnostic devices offer easy operation, fast analytical outcome, and affordable cost, which promote their advanced research and versatile adoptability. Keeping advantages in view, considerable efforts are being made to design and develop smart sensing components such as miniaturized transduction, interdigitated electrodes-based sensing chips, selective detection at low level, portable packaging, and sustainable durability to promote POC diagnostics according to the needs of patient care. Such effective diagnostics systems are in demand, which creates the challenge to make them more efficient in every aspect to generate a desired bio-informatic needed for better health access and management. Keeping advantages and scope in view, this mini review focuses on practical scenarios associated with miniaturized analytical diagnostic devices at POC application for targeted disease diagnostics smartly and efficiently. Moreover, advancements in technologies, such as smartphone-based operation, paper-based sensing assays, and lab-on-a-chip (LOC) which made POC more sensitive, informative, and suitable for major infectious disease diagnosis, are the main focus here. Besides, POC diagnostics based on automated patient sample integration with a sensing platform is continuously improving therapeutics interventions against specific infectious disease. This review also discussed challenges associated with state-of-the-art technology along with future research opportunities to design and develop next generation POC diagnostic systems needed to manage infectious diseases in a personalized manner.
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Affiliation(s)
- Sandeep Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India
| | - Monika Nehra
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India
| | - Sakina Khurana
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India
| | - Neeraj Dilbaghi
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India
| | - Vanish Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Ajeet Kaushik
- NanoBioTech Laboratory, Department of Natural Sciences, Division of Sciences, Art, & Mathematics, Florida Polytechnic University, Lakeland, FL, 33805-8531, USA
| | - Ki-Hyun Kim
- Department of Civil & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
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53
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Maximiano EM, Sequinel T, Martins CA, Angnes L, Gonçalves Trindade MA. Newly designed dual-mode electrochemical sensor onto a single polydimethylsiloxane-based chip. Talanta 2021; 221:121611. [DOI: 10.1016/j.talanta.2020.121611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/28/2020] [Accepted: 08/29/2020] [Indexed: 01/24/2023]
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54
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Basiri A, Heidari A, Nadi MF, Fallahy MTP, Nezamabadi SS, Sedighi M, Saghazadeh A, Rezaei N. Microfluidic devices for detection of RNA viruses. Rev Med Virol 2021; 31:1-11. [PMID: 32844526 PMCID: PMC7460878 DOI: 10.1002/rmv.2154] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 12/12/2022]
Abstract
There is a long way to go before the coronavirus disease 2019 (Covid-19) outbreak comes under control. qRT-PCR is currently used for the detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of Covid-19, but it is expensive, time-consuming, and not as sensitive as it should be. Finding a rapid, easy-to-use, and cheap diagnostic method is necessary to help control the current outbreak. Microfluidic systems provide a platform for many diagnostic tests, including RT-PCR, RT-LAMP, nested-PCR, nucleic acid hybridization, ELISA, fluorescence-Based Assays, rolling circle amplification, aptamers, sample preparation multiplexer (SPM), Porous Silicon Nanowire Forest, silica sol-gel coating/bonding, and CRISPR. They promise faster, cheaper, and easy-to-use methods with higher sensitivity, so microfluidic devices have a high potential to be an alternative method for the detection of viral RNA. These devices have previously been used to detect RNA viruses such as H1N1, Zika, HAV, HIV, and norovirus, with acceptable results. This paper provides an overview of microfluidic systems as diagnostic methods for RNA viruses with a focus on SARS-CoV-2.
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Affiliation(s)
- Arefeh Basiri
- Department of Biomaterials and Tissue Engineering, School of Advanced Technology in MedicineIsfahan University of Medical SciencesIsfahanIran
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
| | - Arash Heidari
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Melina Farshbaf Nadi
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Mohammad Taha Pahlevan Fallahy
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Sasan Salehi Nezamabadi
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Mohammadreza Sedighi
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- School of MedicineTehran University of Medical SciencesTehranIran
| | - Amene Saghazadeh
- Systematic Review and Meta‐analysis Expert Group (SRMEG), Universal Scientific Education and Research Network (USERN), TehranIran
- Research Center for Immunodeficiencies, Children's Medical CenterTehran University of Medical SciencesTehranIran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical CenterTehran University of Medical SciencesTehranIran
- Department of Immunology, School of MedicineTehran University of Medical SciencesTehranIran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), TehranIran
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55
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Kundu A, McCoy L, Azim N, Nguyen H, Didier CM, Ausaf T, Sharma AD, Curley JL, Moore MJ, Rajaraman S. Fabrication and Characterization of 3D Printed, 3D Microelectrode Arrays for Interfacing with a Peripheral Nerve-on-a-Chip. ACS Biomater Sci Eng 2020; 7:3018-3029. [PMID: 34275292 DOI: 10.1021/acsbiomaterials.0c01184] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a nontraditional fabrication technique for the realization of three-dimensional (3D) microelectrode arrays (MEAs) capable of interfacing with 3D cellular networks in vitro. The technology uses cost-effective makerspace microfabrication techniques to fabricate the 3D MEAs with 3D printed base structures with the metallization of the microtowers and conductive traces being performed by stencil mask evaporation techniques. A biocompatible lamination layer insulates the traces for realization of 3D microtower MEAs (250 μm base diameter, 400 μm height). The process has additionally been extended to realize smaller electrodes (30 μm × 30 μm) at a height of 400 μm atop the 3D microtower using laser micromachining of an additional silicon dioxide (SiO2) insulation layer. A 3D microengineered, nerve-on-a-chip in vitro model for recording and stimulating electrical activity of dorsal root ganglion (DRG) cells has further been integrated with the 3D MEA. We have characterized the 3D electrodes for electrical, chemical, electrochemical, biological, and chip hydration stability performance metrics. A decrease in impedance from 1.8 kΩ to 670 Ω for the microtower electrodes and 55 to 39 kΩ for the 30 μm × 30 μm microelectrodes can be observed for an electrophysiologically relevant frequency of 1 kHz upon platinum electroless plating. Biocompatibility assays on the components of the system resulted in a large range (∼3%-70% live cells), depending on the components. Fourier-transform infrared (FTIR) spectra of the resin material start to reveal possible compositional clues for the resin, and the hydration stability is demonstrated in in-vitro-like conditions for 30 days. The fabricated 3D MEAs are rapidly produced with minimal usage of a cleanroom and are fully functional for electrical interrogation of the 3D organ-on-a-chip models for high-throughput of pharmaceutical screening and toxicity testing of compounds in vitro.
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Affiliation(s)
- Avra Kundu
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Laurie McCoy
- AxoSim, Inc., New Orleans, Louisiana 70112, United States
| | - Nilab Azim
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States.,Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Hieu Nguyen
- AxoSim, Inc., New Orleans, Louisiana 70112, United States
| | - Charles M Didier
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States.,Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida 32827, United States
| | - Tariq Ausaf
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States.,Department of Electrical & Computer Engineering, University of Central Florida, Orlando, Florida 32826, United States
| | - Anup D Sharma
- AxoSim, Inc., New Orleans, Louisiana 70112, United States
| | - J Lowry Curley
- AxoSim, Inc., New Orleans, Louisiana 70112, United States
| | - Michael J Moore
- AxoSim, Inc., New Orleans, Louisiana 70112, United States.,Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Swaminathan Rajaraman
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States.,Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida 32827, United States.,Department of Electrical & Computer Engineering, University of Central Florida, Orlando, Florida 32826, United States.,Department of Materials Science & Engineering, University of Central Florida, Orlando, Florida 32826, United States
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56
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Rojas D, Hernández-Rodríguez JF, Della Pelle F, Del Carlo M, Compagnone D, Escarpa A. Oxidative stress on-chip: Prussian blue-based electrode array for in situ detection of H2O2 from cell populations. Biosens Bioelectron 2020; 170:112669. [DOI: 10.1016/j.bios.2020.112669] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/15/2020] [Accepted: 09/29/2020] [Indexed: 12/15/2022]
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57
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Hernández-Rodríguez JF, Rojas D, Escarpa A. Electrochemical Sensing Directions for Next-Generation Healthcare: Trends, Challenges, and Frontiers. Anal Chem 2020; 93:167-183. [PMID: 33174738 DOI: 10.1021/acs.analchem.0c04378] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Juan F Hernández-Rodríguez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Daniel Rojas
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.,Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.,Chemical Research Institute Andres M. del Rio, University of Alcalá, E-28871 Madrid, Spain
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58
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Su R, Wen J, Su Q, Wiederoder MS, Koester SJ, Uzarski JR, McAlpine MC. 3D printed self-supporting elastomeric structures for multifunctional microfluidics. SCIENCE ADVANCES 2020; 6:6/41/eabc9846. [PMID: 33036980 PMCID: PMC7546717 DOI: 10.1126/sciadv.abc9846] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 08/26/2020] [Indexed: 05/12/2023]
Abstract
Microfluidic devices fabricated via soft lithography have demonstrated compelling applications such as lab-on-a-chip diagnostics, DNA microarrays, and cell-based assays. These technologies could be further developed by directly integrating microfluidics with electronic sensors and curvilinear substrates as well as improved automation for higher throughput. Current additive manufacturing methods, such as stereolithography and multi-jet printing, tend to contaminate substrates with uncured resins or supporting materials during printing. Here, we present a printing methodology based on precisely extruding viscoelastic inks into self-supporting microchannels and chambers without requiring sacrificial materials. We demonstrate that, in the submillimeter regime, the yield strength of the as-extruded silicone ink is sufficient to prevent creep within a certain angular range. Printing toolpaths are specifically designed to realize leakage-free connections between channels and chambers, T-shaped intersections, and overlapping channels. The self-supporting microfluidic structures enable the automatable fabrication of multifunctional devices, including multimaterial mixers, microfluidic-integrated sensors, automation components, and 3D microfluidics.
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Affiliation(s)
- Ruitao Su
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jiaxuan Wen
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Qun Su
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Michael S Wiederoder
- U.S. Army Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA
| | - Steven J Koester
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Joshua R Uzarski
- U.S. Army Combat Capabilities Development Command Soldier Center, Natick, MA 01760, USA
| | - Michael C McAlpine
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
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59
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Morbioli GG, Speller NC, Stockton AM. A practical guide to rapid-prototyping of PDMS-based microfluidic devices: A tutorial. Anal Chim Acta 2020; 1135:150-174. [PMID: 33070852 DOI: 10.1016/j.aca.2020.09.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/09/2020] [Accepted: 09/07/2020] [Indexed: 12/30/2022]
Abstract
Micro total analytical systems (μTAS) are attractive to multiple fields that include chemistry, medicine and engineering due to their portability, low power usage, potential for automation, and low sample and reagent consumption, which in turn results in low waste generation. The development of fully-functional μTAS is an iterative process, based on the design, fabrication and testing of multiple prototype microdevices. Typically, microfabrication protocols require a week or more of highly-skilled personnel time in high-maintenance cleanroom facilities, which makes this iterative process cost-prohibitive in many locations worldwide. Rapid-prototyping tools, in conjunction with the use of polydimethylsiloxane (PDMS), enable rapid development of microfluidic structures at lower costs, circumventing these issues in conventional microfabrication techniques. Multiple rapid-prototyping methods to fabricate PDMS-based microfluidic devices have been demonstrated in literature since the advent of soft-lithography in 1998; each method has its unique advantages and drawbacks. Here, we present a tutorial discussing current rapid-prototyping techniques to fabricate PDMS-based microdevices, including soft-lithography, print-and-peel and scaffolding techniques, among other methods, specifically comparing resolution of the features, fabrication processes and associated costs for each technique. We also present thoughts and insights towards each step of the iterative microfabrication process, from design to testing, to improve the development of fully-functional PDMS-based microfluidic devices at faster rates and lower costs.
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Affiliation(s)
| | - Nicholas Colby Speller
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Amanda M Stockton
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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60
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Abstract
The microfluidics field is at a critical crossroads. The vast majority of microfluidic devices are presently manufactured using micromolding processes that work very well for a reduced set of biocompatible materials, but the time, cost, and design constraints of micromolding hinder the commercialization of many devices. As a result, the dissemination of microfluidic technology-and its impact on society-is in jeopardy. Digital manufacturing (DM) refers to a family of computer-centered processes that integrate digital three-dimensional (3D) designs, automated (additive or subtractive) fabrication, and device testing in order to increase fabrication efficiency. Importantly, DM enables the inexpensive realization of 3D designs that are impossible or very difficult to mold. The adoption of DM by microfluidic engineers has been slow, likely due to concerns over the resolution of the printers and the biocompatibility of the resins. In this article, we review and discuss the various printer types, resolution, biocompatibility issues, DM microfluidic designs, and the bright future ahead for this promising, fertile field.
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Affiliation(s)
- Arman Naderi
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA;
| | - Nirveek Bhattacharjee
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA;
| | - Albert Folch
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA;
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61
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Aryan V, Bertling J, Liedtke C. Topology, typology, and dynamics of commons‐based peer production: On platforms, actors, and innovation in the maker movement. CREATIVITY AND INNOVATION MANAGEMENT 2020. [DOI: 10.1111/caim.12392] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Venkat Aryan
- Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT Oberhausen Germany
- Wuppertal Institute for Climate, Environment and Energy Wuppertal Germany
- Folkwang University of the Arts Essen Germany
| | - Juergen Bertling
- Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT Oberhausen Germany
| | - Christa Liedtke
- Wuppertal Institute for Climate, Environment and Energy Wuppertal Germany
- Folkwang University of the Arts Essen Germany
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62
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Hosic S, Bindas AJ, Puzan ML, Lake W, Soucy JR, Zhou F, Koppes RA, Breault DT, Murthy SK, Koppes AN. Rapid Prototyping of Multilayer Microphysiological Systems. ACS Biomater Sci Eng 2020; 7:2949-2963. [PMID: 34275297 DOI: 10.1021/acsbiomaterials.0c00190] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Microfluidic organs-on-chips aim to realize more biorelevant in vitro experiments compared to traditional two-dimensional (2D) static cell culture. Often such devices are fabricated via poly(dimethylsiloxane) (PDMS) soft lithography, which offers benefits (e.g., high feature resolution) along with drawbacks (e.g., prototyping time/costs). Here, we report benchtop fabrication of multilayer, PDMS-free, thermoplastic organs-on-chips via laser cut and assembly with double-sided adhesives that overcome some limitations of traditional PDMS lithography. Cut and assembled chips are economical to prototype ($2 per chip), can be fabricated in parallel within hours, and are Luer compatible. Biocompatibility was demonstrated with epithelial line Caco-2 cells and primary human small intestinal organoids. Comparable to control static Transwell cultures, Caco-2 and organoids cultured on chips formed confluent monolayers expressing tight junctions with low permeability. Caco-2 cells-on-chip differentiated ∼4 times faster, including increased mucus, compared to controls. To demonstrate the robustness of cut and assemble, we fabricated a dual membrane, trilayer chip integrating 2D and 3D compartments with accessible apical and basolateral flow chambers. As proof of concept, we cocultured a human, differentiated monolayer and intact 3D organoids within multilayered contacting compartments. The epithelium exhibited 3D tissue structure and organoids expanded close to the adjacent monolayer, retaining proliferative stem cells over 10 days. Taken together, cut and assemble offers the capability to rapidly and economically manufacture microfluidic devices, thereby presenting a compelling fabrication technique for developing organs-on-chips of various geometries to study multicellular tissues.
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Affiliation(s)
- Sanjin Hosic
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Adam J Bindas
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Marissa L Puzan
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Will Lake
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Jonathan R Soucy
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Fanny Zhou
- Division of Endocrinology, Boston Children's Hospital, 300 Longwood Avenue, Boston, Massachusetts 02115, United States
| | - Ryan A Koppes
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - David T Breault
- Division of Endocrinology, Boston Children's Hospital, 300 Longwood Avenue, Boston, Massachusetts 02115, United States.,Department of Pediatrics, Harvard Medical School, 300 Longwood Avenue, Boston, Massachusetts 02115, United States.,Principal Faculty, Harvard Stem Cell Institute, 7 Divinity Ave, Cambridge, Massachusetts 02138, United States
| | - Shashi K Murthy
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
| | - Abigail N Koppes
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States.,Department of Biology, Northeastern University, 360 Huntington Ave., 313 Snell Engineering, Boston, Massachusetts 02115, United States
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63
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All-aqueous emulsions as miniaturized chemical reactors in the food and bioprocess technology. Curr Opin Food Sci 2020. [DOI: 10.1016/j.cofs.2020.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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64
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Griffith CM, Huang SA, Cho C, Khare TM, Rich M, Lee GH, Ligler FS, Diekman BO, Polacheck WJ. Microfluidics for the study of mechanotransduction. JOURNAL OF PHYSICS D: APPLIED PHYSICS 2020; 53:224004. [PMID: 33840837 PMCID: PMC8034607 DOI: 10.1088/1361-6463/ab78d4] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Mechanical forces regulate a diverse set of biological processes at cellular, tissue, and organismal length scales. Investigating the cellular and molecular mechanisms that underlie the conversion of mechanical forces to biological responses is challenged by limitations of traditional animal models and in vitro cell culture, including poor control over applied force and highly artificial cell culture environments. Recent advances in fabrication methods and material processing have enabled the development of microfluidic platforms that provide precise control over the mechanical microenvironment of cultured cells. These devices and systems have proven to be powerful for uncovering and defining mechanisms of mechanotransduction. In this review, we first give an overview of the main mechanotransduction pathways that function at sites of cell adhesion, many of which have been investigated with microfluidics. We then discuss how distinct microfluidic fabrication methods can be harnessed to gain biological insight, with description of both monolithic and replica molding approaches. Finally, we present examples of how microfluidics can be used to apply both solid forces (substrate mechanics, strain, and compression) and fluid forces (luminal, interstitial) to cells. Throughout the review, we emphasize the advantages and disadvantages of different fabrication methods and applications of force in order to provide perspective to investigators looking to apply forces to cells in their own research.
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Affiliation(s)
- Christian M Griffith
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
| | - Stephanie A Huang
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
| | - Crescentia Cho
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
| | - Tanmay M Khare
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC
| | - Matthew Rich
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
- Thurston Arthritis Research Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC
| | - Gi-Hun Lee
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
| | - Frances S Ligler
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
| | - Brian O Diekman
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
- Thurston Arthritis Research Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC
| | - William J Polacheck
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC and North Carolina State University, Raleigh, NC
- McAllister Heart Institute, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC
- Cancer Cell Biology Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC
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65
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Fabrication and Characterization of a Low-Cost Microfluidic System for the Manufacture of Alginate-Lacasse Microcapsules. Polymers (Basel) 2020; 12:polym12051158. [PMID: 32438541 PMCID: PMC7284885 DOI: 10.3390/polym12051158] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/20/2020] [Accepted: 04/27/2020] [Indexed: 11/22/2022] Open
Abstract
The development of microfluidics-based systems in the recent years has provided a rapid and controlled method for the generation of monodisperse microencapsulates for multiple applications. Here, we explore the design, manufacture and characterization of a low-cost microsystem for the encapsulation of the fungal laccase from Pycnoporus sanguineus CS43 in alginate microcapsules. Multiphysics simulations were used to overview the fluid behavior within the device and estimate the resulting capsule size. Polymethylmethacrylate (PMMA) sheets were used for final microsystem manufacture. Different flow rates of the continuous (Qc) and discrete (Qd) phases in the ranges of 83–293 mL/h and 1–5 mL/h, respectively, were evaluated for microcapsule fabrication. Universal Serial Bus (USB) microscope and image analysis was used to measure the final particle size. Laccase encapsulation was evaluated using spectrophotometry and with the aid of fluorescent dyes and confocal microscopy. Results showed microcapsule size was in the range of 203.13–716.00 μm and Qc was found as the dominant parameter to control capsule size. There was an effective enzyme encapsulation of 65.94% with respect to the initial laccase solution.
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66
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Cairone F, Davi S, Stella G, Guarino F, Recca G, Cicala G, Bucolo M. 3D-Printed micro-optofluidic device for chemical fluids and cells detection. Biomed Microdevices 2020; 22:37. [PMID: 32419044 DOI: 10.1007/s10544-020-00487-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In this work, it is presented a micro-optofluidic flow detector used for on-chip biological and chemical samples investigation. It is made in Poly-dimethyl-siloxane using a master-slave approach based on the 3D-Printing techniques. The micro-optofluidic device is made by assembling a microfluidic T-junction with a micro-optical section that consists of two optical fiber insertions and a PDMS gold-spattered micro-waveguide. The working principle in the detection is based on a different light transmission correlated to the fluid interfering with the laser beam in a micro-channel section. The proposed solution allows to realize a PDMS micro-device taking the advantage of 3D- Printing and goes beyond the restriction in the material selection. The device's performances were tested in the fluids detection and in the evaluation of the cell concentrations. Additionally, the micro-device was used as a real-time two-phase fluids flow detector. The two-phases flows were successfully monitored in different experimental conditions, varying both hydrodynamic and optical external stimuli.
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Affiliation(s)
- Fabiana Cairone
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy
| | - Santi Davi
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy
| | - Giovanna Stella
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy
| | - Francesca Guarino
- Department of Biomedical and Biotechnological Science, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy
| | - Giuseppe Recca
- National Research Council of Italy - IPCB Institute for Polymers, Composites and Biomaterials, via Gaifami 18, 95126, Catania, CT, Italy
| | - Gianluca Cicala
- Department of Civil Engineering and Architecture, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy
| | - Maide Bucolo
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, viale A. Doria 6, 95125, Catania, CT, Italy.
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67
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Cui KW, Engel L, Dundes CE, Nguyen TC, Loh KM, Dunn AR. Spatially controlled stem cell differentiation via morphogen gradients: A comparison of static and dynamic microfluidic platforms. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY. A, VACUUM, SURFACES, AND FILMS : AN OFFICIAL JOURNAL OF THE AMERICAN VACUUM SOCIETY 2020; 38:033205. [PMID: 32255900 PMCID: PMC7093209 DOI: 10.1116/1.5142012#suppl] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 05/30/2023]
Abstract
The ability to harness the processes by which complex tissues arise during embryonic development would improve the ability to engineer complex tissuelike constructs in vitro-a longstanding goal of tissue engineering and regenerative medicine. In embryos, uniform populations of stem cells are exposed to spatial gradients of diffusible extracellular signaling proteins, known as morphogens. Varying levels of these signaling proteins induce stem cells to differentiate into distinct cell types at different positions along the gradient, thus creating spatially patterned tissues. Here, the authors describe two straightforward and easy-to-adopt microfluidic strategies to expose human pluripotent stem cells in vitro to spatial gradients of desired differentiation-inducing extracellular signals. Both approaches afford a high degree of control over the distribution of extracellular signals, while preserving the viability of the cultured stem cells. The first microfluidic platform is commercially available and entails static culture, whereas the second microfluidic platform requires fabrication and dynamic fluid exchange. In each platform, the authors first computationally modeled the spatial distribution of differentiation-inducing extracellular signals. Then, the authors used each platform to expose human pluripotent stem cells to a gradient of these signals (in this case, inducing a cell type known as the primitive streak), resulting in a regionalized culture with differentiated primitive streak cells predominately localized on one side and undifferentiated stem cells at the other side of the device. By combining this approach with a fluorescent reporter for differentiated cells and live-cell fluorescence imaging, the authors characterized the spatial and temporal dynamics of primitive streak differentiation within the induced signaling gradients. Microfluidic approaches to create precisely controlled morphogen gradients will add to the stem cell and developmental biology toolkit, and may eventually pave the way to create increasingly spatially patterned tissuelike constructs in vitro.
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Affiliation(s)
- Kiara W Cui
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Leeya Engel
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Carolyn E Dundes
- Department of Developmental Biology, Stanford Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305
| | - Tina C Nguyen
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Kyle M Loh
- Department of Developmental Biology, Stanford Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305
| | - Alexander R Dunn
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
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68
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Cui KW, Engel L, Dundes CE, Nguyen TC, Loh KM, Dunn AR. Spatially controlled stem cell differentiation via morphogen gradients: A comparison of static and dynamic microfluidic platforms. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY. A, VACUUM, SURFACES, AND FILMS : AN OFFICIAL JOURNAL OF THE AMERICAN VACUUM SOCIETY 2020; 38:033205. [PMID: 32255900 PMCID: PMC7093209 DOI: 10.1116/1.5142012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 05/21/2023]
Abstract
The ability to harness the processes by which complex tissues arise during embryonic development would improve the ability to engineer complex tissuelike constructs in vitro-a longstanding goal of tissue engineering and regenerative medicine. In embryos, uniform populations of stem cells are exposed to spatial gradients of diffusible extracellular signaling proteins, known as morphogens. Varying levels of these signaling proteins induce stem cells to differentiate into distinct cell types at different positions along the gradient, thus creating spatially patterned tissues. Here, the authors describe two straightforward and easy-to-adopt microfluidic strategies to expose human pluripotent stem cells in vitro to spatial gradients of desired differentiation-inducing extracellular signals. Both approaches afford a high degree of control over the distribution of extracellular signals, while preserving the viability of the cultured stem cells. The first microfluidic platform is commercially available and entails static culture, whereas the second microfluidic platform requires fabrication and dynamic fluid exchange. In each platform, the authors first computationally modeled the spatial distribution of differentiation-inducing extracellular signals. Then, the authors used each platform to expose human pluripotent stem cells to a gradient of these signals (in this case, inducing a cell type known as the primitive streak), resulting in a regionalized culture with differentiated primitive streak cells predominately localized on one side and undifferentiated stem cells at the other side of the device. By combining this approach with a fluorescent reporter for differentiated cells and live-cell fluorescence imaging, the authors characterized the spatial and temporal dynamics of primitive streak differentiation within the induced signaling gradients. Microfluidic approaches to create precisely controlled morphogen gradients will add to the stem cell and developmental biology toolkit, and may eventually pave the way to create increasingly spatially patterned tissuelike constructs in vitro.
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Affiliation(s)
- Kiara W Cui
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Leeya Engel
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Carolyn E Dundes
- Department of Developmental Biology, Stanford Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305
| | - Tina C Nguyen
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
| | - Kyle M Loh
- Department of Developmental Biology, Stanford Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305
| | - Alexander R Dunn
- Department of Chemical Engineering, Stanford University, Stanford, California 94305
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69
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Abstract
Microfluidic devices developed over the past decade feature greater intricacy, increased performance requirements, new materials, and innovative fabrication methods. Consequentially, new algorithmic and design approaches have been developed to introduce optimization and computer-aided design to microfluidic circuits: from conceptualization to specification, synthesis, realization, and refinement. The field includes the development of new description languages, optimization methods, benchmarks, and integrated design tools. Here, recent advancements are reviewed in the computer-aided design of flow-, droplet-, and paper-based microfluidics. A case study of the design of resistive microfluidic networks is discussed in detail. The review concludes with perspectives on the future of computer-aided microfluidics design, including the introduction of cloud computing, machine learning, new ideation processes, and hybrid optimization.
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Affiliation(s)
- Elishai Ezra Tsur
- Neuro-Biomorphic Engineering Lab (NBEL), Department of Mathematics and Computer Science, The Open University of Israel, Ra'anana 4353701, Israel;
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70
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Naseri M, Simon GP, Batchelor W. Development of a Paper-Based Microfluidic System for a Continuous High-Flow-Rate Fluid Manipulation. Anal Chem 2020; 92:7307-7316. [PMID: 32290646 DOI: 10.1021/acs.analchem.0c01003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The current study describes the development of a disposable paper-based microfluidic system, which unlike its predecessors that are only capable of processing a small amount of fluid, can continuously process the fluid at a high flow rate of up to 1.5 mL/min. The fabrication procedure was clean-room-free and robust, involving the use of a CO2 laser to engrave the microchannels on a paper substrate, followed by alkenyl ketene dimer treatment to hydrophobize the paper and lamination. The microchannel down to a minimum depth of ∼80 μm with an average roughness of ∼8 μm was engraved on the substrate. As a proof of concept, the applicability of this system to enrich the microparticles based on the inertial focusing mechanism was tested. This new generation of paper-based microfluidic system can be potentially used for the diagnostic applications where the analyte is low in quantity and processing a large volume of fluid sample is required.
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Affiliation(s)
- Mahdi Naseri
- Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
| | - George P Simon
- Department of Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia
| | - Warren Batchelor
- Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
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71
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Li C, Hite Z, Warrick JW, Li J, Geller SH, Trantow VG, McClean MN, Beebe DJ. Under oil open-channel microfluidics empowered by exclusive liquid repellency. SCIENCE ADVANCES 2020; 6:eaay9919. [PMID: 32494607 PMCID: PMC7164933 DOI: 10.1126/sciadv.aay9919] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/30/2019] [Indexed: 05/04/2023]
Abstract
Recently, the functionality of under oil open microfluidics was expanded from droplet-based operations to include lateral flow in under oil aqueous channels. However, the resolution of the under oil fluidic channels reported so far is still far from comparable with that of closed-channel microfluidics (millimeters versus micrometers). Here, enabled by exclusive liquid repellency and an under oil sweep technique, open microchannels can now be prepared under oil (rather than in air), which shrinks the channel dimensions up to three orders of magnitude compared to previously reported techniques. Spatial trapping of different cellular samples and advanced control of mass transport (i.e., enhanced upper limit of flow rate, steady flow with passive pumping, and reversible fluidic valves) were achieved with open-channel designs. We apply these functional advances to enable dynamic measurements of dispersion from a pathogenic fungal biofilm. The ensemble of added capabilities reshapes the potential application space for open microfluidics.
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Affiliation(s)
- Chao Li
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Zachary Hite
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Jay W. Warrick
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Jiayi Li
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Stephanie H. Geller
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Victoria G. Trantow
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Megan N. McClean
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
- Corresponding author. (D.J.B.); (M.N.M.)
| | - David J. Beebe
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
- Corresponding author. (D.J.B.); (M.N.M.)
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72
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Kong T, Shum HC, Weitz DA. The Fourth Decade of Microfluidics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000070. [PMID: 32133792 DOI: 10.1002/smll.202000070] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Tiantian Kong
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, 518000, Guangdong, China
| | - Ho Cheung Shum
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong
- HKU-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, 518000, Guangdong, China
| | - David A Weitz
- Department of Physics, Harvard University, Cambridge, Massachusetts, 02138, USA
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73
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Carter SSD, Barbe L, Tenje M, Mestres G. Exploring microfluidics as a tool to evaluate the biological properties of a titanium alloy under dynamic conditions. Biomater Sci 2020; 8:6309-6321. [DOI: 10.1039/d0bm00964d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
When evaluating the biological properties of titanium under dynamic conditions, cell proliferation was shown to be dominant over cell differentiation.
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Affiliation(s)
- Sarah-Sophia D. Carter
- Division of Microsystems Technology
- Department of Materials Science and Engineering
- Science for Life Laboratory
- Uppsala University
- 751 22 Uppsala
| | - Laurent Barbe
- Division of Microsystems Technology
- Department of Materials Science and Engineering
- Science for Life Laboratory
- Uppsala University
- 751 22 Uppsala
| | - Maria Tenje
- Division of Microsystems Technology
- Department of Materials Science and Engineering
- Science for Life Laboratory
- Uppsala University
- 751 22 Uppsala
| | - Gemma Mestres
- Division of Microsystems Technology
- Department of Materials Science and Engineering
- Science for Life Laboratory
- Uppsala University
- 751 22 Uppsala
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74
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Lv X, Wang L, Fu J, Li Y, Yu L. A one-step tannic acid coating to improve cell adhesion and proliferation on polydimethylsiloxane. NEW J CHEM 2020. [DOI: 10.1039/d0nj02663h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A green and straightforward tannic acid functionalization can enhance cell adhesion and proliferation on PDMS, and thus, can be potentially used for microfluidic cell assay devices for cellular physiological study or drug screening.
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Affiliation(s)
- Xiaohui Lv
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Linxiang Wang
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Jingjing Fu
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Yuan Li
- Central Laboratory of Yongchuan Hospital
- Chongqing Medical University
- Chongqing 402160
- P. R. China
| | - Ling Yu
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
- Chongqing 400715
- P. R. China
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75
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Snyder JE, Walsh D, Carr PA, Rothschild LJ. A Makerspace for Life Support Systems in Space. Trends Biotechnol 2019; 37:1164-1174. [DOI: 10.1016/j.tibtech.2019.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 12/12/2022]
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76
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Kundu A, Nogueira Campos MG, Santra S, Rajaraman S. Precision Vascular Delivery of Agrochemicals with Micromilled Microneedles (µMMNs). Sci Rep 2019; 9:14008. [PMID: 31570804 PMCID: PMC6768873 DOI: 10.1038/s41598-019-50386-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 09/03/2019] [Indexed: 11/16/2022] Open
Abstract
We demonstrate use of makerspace techniques involving subtractive microtechnologies to fabricate micromilled microneedles (µMMNs) of stainless steel (SS) for precise delivery of agrochemicals into vascular bundles of plant tissue. Precision delivery is of immense importance for systemic pathogen control in specific areas of plant tissue. Optimization of the micromilling allows for selective removal of SS at the microscale and the microfabrication of a 5 × 5 array of µMMNs having both base width and height of 500 µm to enable precise puncture into the stem of citrus saplings. Atomic Absorption Spectroscopy reveals up to 7.5× increase in the uptake of a therapeutic cargo while Scanning Electron Microscopy reveals that specific sites of the vascular bundle; either xylem or the phloem can be uniquely targeted with customized µMMNs. Such rapid and cost-effective customization with intricate designs along with scalability is enabled by makerspace microfabrication. Additionally, a 19 × 20 array of micromilled mesoneedles has been fabricated and affixed to a paint roller as an applicator system for real-world field testing outside the laboratory. Initial results indicate reliable behavior of the applicator system and the technique can be applied to the systemic delivery of agrochemicals while conserving the loss of the agrochemical with increased application efficiency.
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Affiliation(s)
- Avra Kundu
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL, 32826, USA
| | | | - Swadeshmukul Santra
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL, 32826, USA
- Department of Materials Science & Engineering, University of Central Florida, Orlando, FL, 32816, USA
- Department of Chemistry, University of Central Florida, Orlando, FL, 32816, USA
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32827, USA
| | - Swaminathan Rajaraman
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL, 32826, USA.
- Department of Materials Science & Engineering, University of Central Florida, Orlando, FL, 32816, USA.
- Department of Electrical & Computer Engineering, University of Central Florida, Orlando, FL, 32816, USA.
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32827, USA.
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77
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Catarino SO, Rodrigues RO, Pinho D, Miranda JM, Minas G, Lima R. Blood Cells Separation and Sorting Techniques of Passive Microfluidic Devices: From Fabrication to Applications. MICROMACHINES 2019; 10:mi10090593. [PMID: 31510012 PMCID: PMC6780402 DOI: 10.3390/mi10090593] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/03/2019] [Accepted: 09/06/2019] [Indexed: 01/23/2023]
Abstract
Since the first microfluidic device was developed more than three decades ago, microfluidics is seen as a technology that exhibits unique features to provide a significant change in the way that modern biology is performed. Blood and blood cells are recognized as important biomarkers of many diseases. Taken advantage of microfluidics assets, changes on blood cell physicochemical properties can be used for fast and accurate clinical diagnosis. In this review, an overview of the microfabrication techniques is given, especially for biomedical applications, as well as a synopsis of some design considerations regarding microfluidic devices. The blood cells separation and sorting techniques were also reviewed, highlighting the main achievements and breakthroughs in the last decades.
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Affiliation(s)
- Susana O Catarino
- Center for MicroElectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Raquel O Rodrigues
- Center for MicroElectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Diana Pinho
- Research Centre in Digitalization and Intelligent Robotics (CeDRI), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- CEFT, Faculdade de Engenharia da Universidade do Porto (FEUP), Rua Roberto Frias, 4200-465 Porto, Portugal
| | - João M Miranda
- CEFT, Faculdade de Engenharia da Universidade do Porto (FEUP), Rua Roberto Frias, 4200-465 Porto, Portugal
| | - Graça Minas
- Center for MicroElectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Rui Lima
- CEFT, Faculdade de Engenharia da Universidade do Porto (FEUP), Rua Roberto Frias, 4200-465 Porto, Portugal.
- MEtRICs, Mechanical Engineering Department, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
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78
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Ko J, Ahn J, Kim S, Lee Y, Lee J, Park D, Jeon NL. Tumor spheroid-on-a-chip: a standardized microfluidic culture platform for investigating tumor angiogenesis. LAB ON A CHIP 2019; 19:2822-2833. [PMID: 31360969 DOI: 10.1039/c9lc00140a] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The field of microfluidics-based three-dimensional (3D) cell culture system is rapidly progressing from academic proof-of-concept studies to valid solutions to real-world problems. Polydimethylsiloxane (PDMS)-based platform has been widely adopted as in vitro platforms for mimicking tumor microenvironment. However, PDMS has not been welcomed as a standardized commercial application for preclinical screening due to inherent material limitations that make it difficult to scale-up production. Here, we present an injection-molded plastic array 3D spheroid culture platform (Sphero-IMPACT). The platform is made of polystyrene (PS) in a standardized 96-well plate format with a user-friendly interface. This interface describes a simpler design that incorporates a tapered hole in the center of the rail to pattern a large spheroid with 3D extracellular matrix and various cell types. This hole is designed to accommodate standard pipette tip for automated system. The platform that mediate open microfluidics allows implement spontaneous fluid patterning with high repeatability from the end user. To demonstrate versatile use of the platform, we developed 3D perfusable blood vessel network and tumor spheroid assays. In addition, we established a tumor spheroid induced angiogenesis model that can be applicable for drug screening. Sphero-IMPACT has the potential to provide a robust and reproducible in vitro assay related to vascularized cancer research. This easy-to-use, ready-to-use platform can be translated into an enhanced preclinical model that faithfully reflects the complex tumor microenvironment.
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Affiliation(s)
- Jihoon Ko
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Jungho Ahn
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Suryong Kim
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Younggyun Lee
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Jungseub Lee
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Dohyun Park
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Noo Li Jeon
- Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea. and Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Republic of Korea and Institute of Bioengineering, Seoul National University, Seoul, 08826, Republic of Korea
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79
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Lin H, Zhao Y, Lin S, Wang B, Yeung C, Cheng X, Wang Z, Cai T, Yu W, King K, Tan J, Salahi K, Hojaiji H, Emaminejad S. A rapid and low-cost fabrication and integration scheme to render 3D microfluidic architectures for wearable biofluid sampling, manipulation, and sensing. LAB ON A CHIP 2019; 19:2844-2853. [PMID: 31359008 DOI: 10.1039/c9lc00418a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The large-scale deployment of wearable bioanalytical devices for general population longitudinal monitoring necessitates rapid and high throughput manufacturing-amenable fabrication schemes that render disposable, low-cost, and mechanically flexible microfluidic modules capable of performing a variety of bioanalytical operations within a compact footprint. The spatial constraints of previously reported wearable bioanalytical devices (with microfluidic operations confined to 2D), their lack of biofluid manipulation capability, and the complex and low-throughput nature of their fabrication process inherently limit the diversity and frequency of end-point assessments and prevent their deployment at large scale. Here, we devise a simple, scalable, and low-cost "CAD-to-3D Device" fabrication and integration scheme, which renders 3D and complex microfluidic architectures capable of performing biofluid sampling, manipulation, and sensing. The devised scheme is based on laser-cutting of tape-based substrates, which can be programmed at the software-level to rapidly define microfluidic features such as a biofluid collection interface, microchannels, and VIAs (vertical interconnect access), followed by the vertical assembly of pre-patterned layers to realize the final device. To inform the utility of our fabrication scheme, we demonstrated three representative devices to perform sweat collection (with visualizable secretion profile), sample filtration, and simultaneous biofluid actuation and sensing (using a sandwiched-interface). Our devised scheme can be adapted for the fabrication and manufacturing of current and future wearable bioanalytical devices, which in turn will catalyze the large-scale production and deployment of such devices for general population health monitoring.
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Affiliation(s)
- Haisong Lin
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Yichao Zhao
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA. and Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA
| | - Shuyu Lin
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Bo Wang
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Christopher Yeung
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA. and Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA
| | - Xuanbing Cheng
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA. and Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA
| | - Zhaoqing Wang
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Tianyou Cai
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Wenzhuo Yu
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Kimber King
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Jiawei Tan
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA. and Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA
| | - Kamyar Salahi
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Hannaneh Hojaiji
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA.
| | - Sam Emaminejad
- Interconnected & Integrated Bioelectronics Lab (I2BL), Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, USA. and Department of Bioengineering, University of California, Los Angeles, CA, USA
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80
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3DμF - Interactive Design Environment for Continuous Flow Microfluidic Devices. Sci Rep 2019; 9:9166. [PMID: 31235804 PMCID: PMC6591506 DOI: 10.1038/s41598-019-45623-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 06/07/2019] [Indexed: 01/16/2023] Open
Abstract
The design of microfluidic Lab on a Chip (LoC) systems is an onerous task requiring specialized skills in fluid dynamics, mechanical design drafting, and manufacturing. Engineers face significant challenges during the labor-intensive process of designing microfluidic devices, with very few specialized tools that help automate the process. Typical design iterations require the engineer to research the architecture, manually draft the device layout, optimize for manufacturing processes, and manually calculate and program the valve sequences that operate the microfluidic device. The problem compounds when engineers not only have to test the functionality of the chip but are also expected to optimize them for the robust execution of biological assays. In this paper, we present an interactive tool for designing continuous flow microfluidic devices. 3DμF is the first completely open source interactive microfluidic system designer that readily supports state of the art design automation algorithms. Through various case studies, we show 3DμF can be used to reproduce designs from literature, provide metrics for evaluating microfluidic design complexity and showcase how 3DμF is a platform for integrating a wide assortment of engineering techniques used in the design of microfluidic devices as a part of the standard design workflow.
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81
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Li C, Niles DJ, Juang DS, Lang JM, Beebe DJ. Automated System for Small-Population Single-Particle Processing Enabled by Exclusive Liquid Repellency. SLAS Technol 2019; 24:535-542. [PMID: 31180792 DOI: 10.1177/2472630319853219] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Exclusive liquid repellency (ELR) describes an extreme wettability phenomenon in which a liquid phase droplet is completely repelled from a solid phase when exposed to a secondary immiscible liquid phase. Earlier, we developed a multi-liquid-phase open microfluidic (or underoil) system based on ELR to facilitate rare-cell culture and single-cell processing. The ELR system can allow for the handling of small volumes of liquid droplets with ultra-low sample loss and biofouling, which makes it an attractive platform for biological applications that require lossless manipulation of rare cellular samples (especially for a limited sample size in the range of a few hundred to a few thousand cells). Here, we report an automated platform using ELR microdrops for single-particle (or single-cell) isolation, identification, and retrieval. This was accomplished via the combined use of a robotic liquid handler, an automated microscopic imaging system, and real-time image-processing software for single-particle identification. The automated ELR technique enables rapid, hands-free, and robust isolation of microdrop-encapsulated rare cellular samples.
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Affiliation(s)
- Chao Li
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - David J Niles
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Duane S Juang
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Joshua M Lang
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA.,Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
| | - David J Beebe
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA.,Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA.,Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI, USA
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82
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Kaprou GD, Papadopoulos V, Papageorgiou DP, Kefala I, Papadakis G, Gizeli E, Chatzandroulis S, Kokkoris G, Tserepi A. Ultrafast, low-power, PCB manufacturable, continuous-flow microdevice for DNA amplification. Anal Bioanal Chem 2019; 411:5297-5307. [PMID: 31161322 DOI: 10.1007/s00216-019-01911-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 04/25/2019] [Accepted: 05/09/2019] [Indexed: 12/12/2022]
Abstract
The design and fabrication of a continuous-flow μPCR device with very short amplification time and low power consumption are presented. Commercially available, 4-layer printed circuit board (PCB) substrates are employed, with in-house designed yet industrially manufactured embedded Cu micro-resistive heaters lying at very close distance from the microfluidic network, where DNA amplification takes place. The 1.9-m-long microchannel in combination with desirably high flow velocities (for fast amplification) challenged the robustness of the sealing that was overcome with the development of a novel bonding method rendering the microdevice robust even at extreme pressure drops (12 bars). The proposed fabrication methods are PCB compatible, allowing for mass and reliable production of the μPCR device in the established PCB industry. The μPCR chip was successfully validated during the amplification of two different DNA fragments (and with different target DNA copies) corresponding to the exon 20 of the BRCA1 gene, and to the plasmid pBR322, a commonly used cloning vector in E. coli. Successful DNA amplification was demonstrated at total reaction times down to 2 min, with a power consumption of 2.7 W, rendering the presented μPCR one of the fastest and lowest power-consuming devices, suitable for implementation in low-resource settings. Detailed numerical calculations of the DNA residence time distributions, within an acceptable temperature range for denaturation, annealing, and extension, performed for the first time in the literature, provide useful information regarding the actual on-chip PCR protocol and justify the maximum volumetric flow rate for successful DNA amplification. The calculations indicate that the shortest amplification time is achieved when the device is operated at its enzyme kinetic limit (i.e., extension rate). Graphical abstract.
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Affiliation(s)
- Georgia D Kaprou
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece.,Department of Biology, University of Crete, Voutes, 70013, Heraklion, Greece
| | - Vasileios Papadopoulos
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece
| | - Dimitris P Papageorgiou
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece.,Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Ioanna Kefala
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece
| | - George Papadakis
- Institute of Molecular Biology and Biotechnology-FORTH, 100 N. Plastira Str., 70013, Heraklion, Greece
| | - Electra Gizeli
- Department of Biology, University of Crete, Voutes, 70013, Heraklion, Greece.,Institute of Molecular Biology and Biotechnology-FORTH, 100 N. Plastira Str., 70013, Heraklion, Greece
| | - Stavros Chatzandroulis
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece
| | - George Kokkoris
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece.
| | - Angeliki Tserepi
- Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Patr. Gregoriou E' and 27 Neapoleos Str., PO Box 60037, 15341, Agia Paraskevi, Attica, Greece.
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83
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Brandner JJ. In-Situ Measurements in Microscale Gas Flows-Conventional Sensors or Something Else? MICROMACHINES 2019; 10:E292. [PMID: 31035685 PMCID: PMC6562918 DOI: 10.3390/mi10050292] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 12/03/2022]
Abstract
Within the last few decades miniaturization has a driving force in almost all areas of technology, leading to a tremendous intensification of systems and processes. Information technology provides now data density several orders of magnitude higher than a few years ago, and the smartphone technology includes, as well the simple ability to communicate with others, features like internet, video and music streaming, but also implementation of the global positioning system, environment sensors or measurement systems for individual health. So-called wearables are everywhere, from the physio-parameter sensing wrist smart watch up to the measurement of heart rates by underwear. This trend holds also for gas flow applications, where complex flow arrangements and measurement systems formerly designed for a macro scale have been transferred into miniaturized versions. Thus, those systems took advantage of the increased surface to volume ratio as well as of the improved heat and mass transfer behavior of miniaturized equipment. In accordance, disadvantages like gas flow mal-distribution on parallelized mini- or micro tubes or channels as well as increased pressure losses due to the minimized hydraulic diameters and an increased roughness-to-dimension ratio have to be taken into account. Furthermore, major problems are arising for measurement and control to be implemented for in-situ and/or in-operando measurements. Currently, correlated measurements are widely discussed to obtain a more comprehensive view to a process by using a broad variety of measurement techniques complementing each other. Techniques for correlated measurements may include commonly used techniques like thermocouples or pressure sensors as well as more complex systems like gas chromatography, mass spectrometry, infrared or ultraviolet spectroscopy and many others. Some of these techniques can be miniaturized, some of them cannot yet. Those should, nevertheless, be able to conduct measurements at the same location and the same time, preferably in-situ and in-operando. Therefore, combinations of measurement instruments might be necessary, which will provide complementary techniques for accessing local process information. A recently more intensively discussed additional possibility is the application of nuclear magnetic resonance (NMR) systems, which might be useful in combination with other, more conventional measurement techniques. NMR is currently undergoing a tremendous change from large-scale to benchtop measurement systems, and it will most likely be further miniaturized. NMR allows a multitude of different measurements, which are normally covered by several instruments. Additionally, NMR can be combined very well with other measurement equipment to perform correlative in-situ and in-operando measurements. Such combinations of several instruments would allow us to retrieve an "information cloud" of a process. This paper will present a view of some common measurement techniques and the difficulties of applying them on one hand in a miniaturized scale, and on the other hand in a correlative mode. Basic suggestions to achieve the above-mentioned objective by a combination of different methods including NMR will be given.
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Affiliation(s)
- Juergen J Brandner
- Staff Position Microstructures and Process Sensors (MPS), Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
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84
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Hubbe H, Mendes E, Boukany PE. Polymeric Nanowires for Diagnostic Applications. MICROMACHINES 2019; 10:mi10040225. [PMID: 30934898 PMCID: PMC6523414 DOI: 10.3390/mi10040225] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/07/2019] [Accepted: 03/15/2019] [Indexed: 02/06/2023]
Abstract
Polymer nanowire-related research has shown considerable progress over the last decade. The wide variety of materials and the multitude of well-established chemical modifications have made polymer nanowires interesting as a functional part of a diagnostic biosensing device. This review provides an overview of relevant publications addressing the needs for a nanowire-based sensor for biomolecules. Working our way towards the detection methods itself, we review different nanowire fabrication methods and materials. Especially for an electrical signal read-out, the nanowire should persist in a single-wire configuration with well-defined positioning. Thus, the possibility of the alignment of nanowires is discussed. While some fabrication methods immanently yield an aligned single wire, other methods result in disordered structures and have to be manipulated into the desired configuration.
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Affiliation(s)
- Hendrik Hubbe
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands.
| | - Eduardo Mendes
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands.
| | - Pouyan E Boukany
- Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands.
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85
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Scalable Methods for Device Patterning as an Outstanding Challenge in Translating Paper-Based Microfluidics from the Academic Benchtop to the Point-of-Care. JOURNAL OF ANALYSIS AND TESTING 2019. [DOI: 10.1007/s41664-019-00093-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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86
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Jajack A, Stamper I, Gomez E, Brothers M, Begtrup G, Heikenfeld J. Continuous, quantifiable, and simple osmotic preconcentration and sensing within microfluidic devices. PLoS One 2019; 14:e0210286. [PMID: 30650158 PMCID: PMC6334995 DOI: 10.1371/journal.pone.0210286] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 12/19/2018] [Indexed: 02/04/2023] Open
Abstract
Insurmountable detection challenges will impede the development of many of the next-generation of lab-on-a-chip devices (e.g., point-of-care and real-time health monitors). Here we present the first membrane-based, microfluidic sample preconcentration method that is continuous, quantifiable, simple, and capable of working with any analyte. Forward osmosis rapidly concentrates analytes by removing water from a stream of sample fluid. 10-100X preconcentration is possible in mere minutes. This requires careful selection of the semi-permeable membrane and draw molecule; therefore, the osmosis performance of several classes of membranes and draw molecules were systematically optimized. Proof-of-concept preconcentration devices were characterized based on their concentration ability and fouling resistance. In-silico theoretical modeling predicts the experimental findings and provides an engineering toolkit for future designs. With this toolkit, inexpensive ready-for-manufacturing prototypes were also developed. These devices provide broad-spectrum detection improvements across many analytes and sensing modalities, enabling next-generation lab-on-a-chip devices.
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Affiliation(s)
- Andrew Jajack
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, United States of America
- * E-mail:
| | - Isaac Stamper
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Eliot Gomez
- Department of Electrical Engineering and Computing Systems, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Michael Brothers
- Department of Electrical Engineering and Computing Systems, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Gavi Begtrup
- Eccrine Systems, Incorporated, Cincinnati, Ohio, United States of America
| | - Jason Heikenfeld
- Department of Electrical Engineering and Computing Systems, University of Cincinnati, Cincinnati, Ohio, United States of America
- Eccrine Systems, Incorporated, Cincinnati, Ohio, United States of America
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87
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Kundu A, Nattoo C, Fremgen S, Springer S, Ausaf T, Rajaraman S. Optimization of makerspace microfabrication techniques and materials for the realization of planar, 3D printed microelectrode arrays in under four days. RSC Adv 2019; 9:8949-8963. [PMID: 35517709 PMCID: PMC9062012 DOI: 10.1039/c8ra09116a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 03/11/2019] [Indexed: 12/24/2022] Open
Abstract
Conventional two-dimensional microelectrode arrays (2D MEAs) in the market involve long manufacturing timeframes, have cleanroom requirements, and need to be assembled from multiple parts to obtain the final packaged device. For MEAs to be “used and tossed”, manufacturing has to be moved from the cleanroom to makerspaces. In order to enable makerspace fabricated MEAs comparable to conventional MEAs, the microfabrication processes must be optimized to have similar electrical properties along with biocompatibility and number of recording sites. This work presents a makerspace microfabricated 2D MEA having electrode densities up to a commercially popular 8 × 8 array, all fabricated under four days. Additive manufacturing-based realization of the MEA devices provides immense flexibility in terms of meeting distinct design requirements. A unique non-planar MEA having meso-scale electrodes on the top side of a chip transitioning to traces onto the bottom side through electrical vias is presented in this work. This allows for (a) monolithic integration of a culture well for devices having up to a 6 × 6 MEA array, (b) selective electroplating of the meso-scale electrodes (500 μm diameter) defined by silver ink casting followed by pulsed electroplating of gold or platinum without any masking procedure, (c) casting of a uniform and planar insulation layer via a novel process of confined precision spin coating (CPSC) of SU-8 which acts as a biocompatible insulation atop the meso-scale electrodes; and (d) selective laser micromachining to define the 50 μm × 50 μm microelectrodes. For an 8 × 8 array, the culture well and MEA chip framework are 3D printed as two separate parts and sealed together with a biocompatible epoxy as in commercially available MEAs. The fabricated MEAs have an average 1 kHz impedance of 36.8 kΩ/16 kΩ with a double layer capacitance of 400 nF cm−2/520 nF cm−2 for nano-porous platinum/nano-gold which is comparable to the state-of-art commercially available 2D MEAs. Additionally, it was found out that our 3D printing-based process compares very favorably with traditional glass MEAs in terms of design to device while representing a dramatic reduction in cost, timeline for fabrication, reduction in the number of steps and the need for sophisticated microfabrication and packaging equipment. “Makerspace microfabrication” with the use of simple tools and materials is used to demonstrate the realization of 2D microelectrode arrays (MEAs) having a density of up to 8 × 8 MEAs in under four days which are comparable to conventional MEAs.![]()
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Affiliation(s)
- Avra Kundu
- NanoScience Technology Center (NSTC)
- University of Central Florida
- Orlando
- USA
| | - Crystal Nattoo
- Department of Electrical and Computer Engineering
- University of Miami
- Coral Gables
- USA
| | - Sarah Fremgen
- NanoScience Technology Center (NSTC)
- University of Central Florida
- Orlando
- USA
| | - Sandra Springer
- NanoScience Technology Center (NSTC)
- University of Central Florida
- Orlando
- USA
| | - Tariq Ausaf
- NanoScience Technology Center (NSTC)
- University of Central Florida
- Orlando
- USA
- Department of Electrical & Computer Engineering
| | - Swaminathan Rajaraman
- NanoScience Technology Center (NSTC)
- University of Central Florida
- Orlando
- USA
- Department of Electrical & Computer Engineering
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88
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Li C, Yu J, Paine P, Juang DS, Berry SM, Beebe DJ. Double-exclusive liquid repellency (double-ELR): an enabling technology for rare phenotype analysis. LAB ON A CHIP 2018; 18:2710-2719. [PMID: 30069559 PMCID: PMC6402335 DOI: 10.1039/c8lc00584b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Double-exclusive liquid repellency (double-ELR) is an extreme wettability phenomenon in which adjacent regions selectively and completely repel immiscible liquids with different surface chemistries on a non-textured substrate (i.e., a substrate in absence of micro/nano-structures). Under double-ELR conditions, each liquid exhibits no physical contact (contact angle of 180°) with its non-preferred surface chemistry, thus enabling complete partitioning of adjacent fluidic volumes (e.g., between water and oil). This enables a new type of cell culture-based assay, where cell loss from common failure modes (e.g., biofouling from inadvertent cell adhesion, detrimental moisture loss/gain, and liquid handling dead volumes) is significantly mitigated. Importantly, the principles of double-ELR were leveraged to achieve underoil sweep patterning, a no-loss, robust and high-throughput distribution of sub-microliter volumes of aqueous media (and cells). In addition to high-efficiency distribution via sweep patterning, double-ELR can be used to construct "modular" (i.e., easily implemented and/or linked together with spatial and temporal control) higher-order architectures for in vitro imitation of physiologically relevant microenvironments that are of particular interest within the cell assay community, including multi-phenotype cultures with excellent spatial and temporal control, three-dimensional layered multi-phenotype cultures, cultures with selective mechanical cues of extracellular matrix (i.e., collagen fiber alignment), and spheroid cultures. Together, these features of double-ELR uniquely facilitate culture and high content analysis of limited cellular samples (e.g., a few hundred to a few thousand cells).
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Affiliation(s)
- Chao Li
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA.
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89
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A Review of Current Methods in Microfluidic Device Fabrication and Future Commercialization Prospects. INVENTIONS 2018. [DOI: 10.3390/inventions3030060] [Citation(s) in RCA: 208] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Microfluidic devices currently play an important role in many biological, chemical, and engineering applications, and there are many ways to fabricate the necessary channel and feature dimensions. In this review, we provide an overview of microfabrication techniques that are relevant to both research and commercial use. A special emphasis on both the most practical and the recently developed methods for microfluidic device fabrication is applied, and it leads us to specifically address laminate, molding, 3D printing, and high resolution nanofabrication techniques. The methods are compared for their relative costs and benefits, with special attention paid to the commercialization prospects of the various technologies.
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90
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Synthesizing Manifested Biology. Trends Biotechnol 2018; 36:867-868. [PMID: 30054057 DOI: 10.1016/j.tibtech.2018.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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91
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Chaves R, Sia SK. Evolution of Materials in Novel Point-of-Care Diagnostics. Clin Chem 2018; 64:1125-1126. [PMID: 29222340 DOI: 10.1373/clinchem.2017.273060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 08/16/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Rodrigo Chaves
- Department of Biomedical Engineering, Columbia University, New York, NY
| | - Samuel K Sia
- Department of Biomedical Engineering, Columbia University, New York, NY
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92
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Brower K, Puccinelli R, Markin CJ, Shimko TC, Longwell SA, Cruz B, Gomez-Sjoberg R, Fordyce PM. An Open-Source, Programmable Pneumatic Setup for Operation and Automated Control of Single- and Multi-Layer Microfluidic Devices. HARDWAREX 2018; 3:117-134. [PMID: 30221210 PMCID: PMC6136661 DOI: 10.1016/j.ohx.2017.10.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Microfluidic technologies have been used across diverse disciplines (e.g. high-throughput biological measurement, fluid physics, laboratory fluid manipulation) but widespread adoption has been limited in part due to the lack of openly disseminated resources that enable non-specialist labs to make and operate their own devices. Here, we report the open-source build of a pneumatic setup capable of operating both single and multilayer (Quake-style) microfluidic devices with programmable scripting automation. This setup can operate both simple and complex devices with 48 device valve control inputs and 18 sample inputs, with modular design for easy expansion, at a fraction of the cost of similar commercial solutions. We present a detailed step-by-step guide to building the pneumatic instrumentation, as well as instructions for custom device operation using our software, Geppetto, through an easy-to-use GUI for live on-chip valve actuation and a scripting system for experiment automation. We show robust valve actuation with near real-time software feedback and demonstrate use of the setup for high-throughput biochemical measurements on-chip. This open-source setup will enable specialists and novices alike to run microfluidic devices easily in their own laboratories.
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Affiliation(s)
- Kara Brower
- Department of Bioengineering, Stanford University, Stanford CA 94305
- Chem-H Institute, Stanford University, Stanford CA 94305
- Stanford Microfluidic Foundry, Stanford University, Stanford CA 94305
| | | | - Craig J Markin
- Department of Biochemistry, Stanford University, Stanford CA 94305
| | - Tyler C Shimko
- Department of Genetics, Stanford University, Stanford CA 94305
| | - Scott A Longwell
- Department of Bioengineering, Stanford University, Stanford CA 94305
| | - Bianca Cruz
- Department of Physics and Astronomy, California State Polytechnic University Pomona, Pomona CA 91768
| | | | - Polly M Fordyce
- Department of Bioengineering, Stanford University, Stanford CA 94305
- Department of Genetics, Stanford University, Stanford CA 94305
- Chem-H Institute, Stanford University, Stanford CA 94305
- Stanford Microfluidic Foundry, Stanford University, Stanford CA 94305
- Chan Zuckerberg Biohub, San Francisco CA 94158
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93
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Shankles PG, Millet LJ, Aufrecht JA, Retterer ST. Accessing microfluidics through feature-based design software for 3D printing. PLoS One 2018; 13:e0192752. [PMID: 29596418 PMCID: PMC5875762 DOI: 10.1371/journal.pone.0192752] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/30/2018] [Indexed: 01/11/2023] Open
Abstract
Additive manufacturing has been a cornerstone of the product development pipeline for decades, playing an essential role in the creation of both functional and cosmetic prototypes. In recent years, the prospects for distributed and open source manufacturing have grown tremendously. This growth has been enabled by an expanding library of printable materials, low-cost printers, and communities dedicated to platform development. The microfluidics community has embraced this opportunity to integrate 3D printing into the suite of manufacturing strategies used to create novel fluidic architectures. The rapid turnaround time and low cost to implement these strategies in the lab makes 3D printing an attractive alternative to conventional micro- and nanofabrication techniques. In this work, the production of multiple microfluidic architectures using a hybrid 3D printing-soft lithography approach is demonstrated and shown to enable rapid device fabrication with channel dimensions that take advantage of laminar flow characteristics. The fabrication process outlined here is underpinned by the implementation of custom design software with an integrated slicer program that replaces less intuitive computer aided design and slicer software tools. Devices are designed in the program by assembling parameterized microfluidic building blocks. The fabrication process and flow control within 3D printed devices were demonstrated with a gradient generator and two droplet generator designs. Precise control over the printing process allowed 3D microfluidics to be printed in a single step by extruding bridge structures to ‘jump-over’ channels in the same plane. This strategy was shown to integrate with conventional nanofabrication strategies to simplify the operation of a platform that incorporates both nanoscale features and 3D printed microfluidics.
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Affiliation(s)
- Peter G. Shankles
- The Bredesen Center for Interdisciplinary Research, The University of Tennessee, Knoxville, TN, United States of America
| | - Larry J. Millet
- The Bredesen Center for Interdisciplinary Research, The University of Tennessee, Knoxville, TN, United States of America
| | - Jayde A. Aufrecht
- The Bredesen Center for Interdisciplinary Research, The University of Tennessee, Knoxville, TN, United States of America
| | - Scott T. Retterer
- The Bredesen Center for Interdisciplinary Research, The University of Tennessee, Knoxville, TN, United States of America
- The Center for Nanophase Materials Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
- * E-mail:
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94
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Tovar M, Weber T, Hengoju S, Lovera A, Munser AS, Shvydkiv O, Roth M. 3D-glass molds for facile production of complex droplet microfluidic chips. BIOMICROFLUIDICS 2018; 12:024115. [PMID: 29657658 PMCID: PMC5882410 DOI: 10.1063/1.5013325] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/09/2018] [Indexed: 05/07/2023]
Abstract
In order to leverage the immense potential of droplet microfluidics, it is necessary to simplify the process of chip design and fabrication. While polydimethylsiloxane (PDMS) replica molding has greatly revolutionized the chip-production process, its dependence on 2D-limited photolithography has restricted the design possibilities, as well as further dissemination of microfluidics to non-specialized labs. To break free from these restrictions while keeping fabrication straighforward, we introduce an approach to produce complex multi-height (3D) droplet microfluidic glass molds and subsequent chip production by PDMS replica molding. The glass molds are fabricated with sub-micrometric resolution using femtosecond laser machining technology, which allows directly realizing designs with multiple levels or even continuously changing heights. The presented technique significantly expands the experimental capabilities of the droplet microfluidic chip. It allows direct fabrication of multilevel structures such as droplet traps for prolonged observation and optical fiber integration for fluorescence detection. Furthermore, the fabrication of novel structures based on sloped channels (ramps) enables improved droplet reinjection and picoinjection or even a multi-parallelized drop generator based on gradients of confinement. The fabrication of these and other 3D-features is currently only available at such resolution by the presented strategy. Together with the simplicity of PDMS replica molding, this provides an accessible solution for both specialized and non-specialized labs to customize microfluidic experimentation and expand their possibilities.
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Affiliation(s)
- Miguel Tovar
- Author to whom correspondence should be addressed:
| | | | | | - Andrea Lovera
- FEMTOprint SA, Via Industria 3, 6933 Muzzano, Switzerland
| | - Anne-Sophie Munser
- Fraunhofer Institute for Applied Optics and Precision Engineering-IOF, Albert-Einstein-Str. 7, 07745 Jena, Germany
| | - Oksana Shvydkiv
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, Beutenbergstr. 11a, 07745 Jena, Germany
| | - Martin Roth
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, Beutenbergstr. 11a, 07745 Jena, Germany
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95
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Akella M, Juárez JJ. High-Throughput Acoustofluidic Self-Assembly of Colloidal Crystals. ACS OMEGA 2018; 3:1425-1436. [PMID: 31458472 PMCID: PMC6641480 DOI: 10.1021/acsomega.7b01862] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 01/22/2018] [Indexed: 05/17/2023]
Abstract
Colloidal crystals are encountered in a variety of energy-harvesting applications, where they serve as waveguides or filters for electromagnetic and electro-optic energy. Techniques such as electric or magnetic assembly are used to assemble colloidal crystals, but are limited by crystal size, yield, and throughput. This article demonstrates the continuous, high-throughput assembly of two-dimensional (2D)-colloidal crystals in an acoustofluidic flow cell. The device is fabricated using off-the-shelf components and does not require a clean-room access. An experimental state diagram shows how the fluid flow rate and voltage applied to the piezoelectric element in our device can tune the crystal microstructure. Highly ordered colloidal crystals are continuously assembled in less than a minute with a throughput yield of several hundred particles per minute using this device. The acoustically assembled ordered 2D crystals are immobilized using a UV-curable resin and extracted as ordered polymer-particle fibers, demonstrating the ability of using acoustic fields to assemble ordered structures embedded in bulk materials. Particle tracking is used to construct the cross-channel particle distribution to understand the effect of acoustic compression on colloidal crystal assembly. Microparticle image velocimetry data is compared to a theoretical transport model to quantify the effect fluid flow and acoustic trapping has on the colloidal crystal ensemble.
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96
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97
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Kundu A, Ausaf T, Rajaraman S. 3D Printing, Ink Casting and Micromachined Lamination (3D PICLμM): A Makerspace Approach to the Fabrication of Biological Microdevices. MICROMACHINES 2018; 9:E85. [PMID: 30393360 PMCID: PMC6187583 DOI: 10.3390/mi9020085] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/07/2018] [Accepted: 02/11/2018] [Indexed: 11/17/2022]
Abstract
We present a novel benchtop-based microfabrication technology: 3D printing, ink casting, micromachined lamination (3D PICLμM) for rapid prototyping of lab-on-a-chip (LOC) and biological devices. The technology uses cost-effective, makerspace-type microfabrication processes, all of which are ideally suited for low resource settings, and utilizing a combination of these processes, we have demonstrated the following devices: (i) 2D microelectrode array (MEA) targeted at in vitro neural and cardiac electrophysiology, (ii) microneedle array targeted at drug delivery through a transdermal route and (iii) multi-layer microfluidic chip targeted at multiplexed assays for in vitro applications. The 3D printing process has been optimized for printing angle, temperature of the curing process and solvent polishing to address various biofunctional considerations of the three demonstrated devices. We have depicted that the 3D PICLμM process has the capability to fabricate 30 μm sized MEAs (average 1 kHz impedance of 140 kΩ with a double layer capacitance of 3 μF), robust and reliable microneedles having 30 μm radius of curvature and ~40 N mechanical fracture strength and microfluidic devices having 150 μm wide channels and 400 μm fluidic vias capable of fluid mixing and transmitted light microparticle visualization. We believe our 3D PICLμM is ideally suited for applications in areas such as electrophysiology, drug delivery, disease in a dish, organ on a chip, environmental monitoring, agricultural therapeutic delivery and genomic testing.
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Affiliation(s)
- Avra Kundu
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32826, USA.
| | - Tariq Ausaf
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32826, USA.
- Department of Electrical & Computer Engineering, University of Central Florida, Orlando, FL 32826, USA.
| | - Swaminathan Rajaraman
- NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32826, USA.
- Department of Electrical & Computer Engineering, University of Central Florida, Orlando, FL 32826, USA.
- Bridging the Innovation Development Gap (BRIDG), Neo City, FL 34744, USA.
- Department of Material Science & Engineering, University of Central Florida, Orlando, FL 32826, USA.
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98
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Zarei M. Infectious pathogens meet point-of-care diagnostics. Biosens Bioelectron 2018; 106:193-203. [PMID: 29428589 DOI: 10.1016/j.bios.2018.02.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 12/12/2022]
Abstract
The field of point-of-care (POC) diagnostics provides the rapid diagnosis of infectious diseases which is essential and critical for improving the general public health in resource-limited settings. POC platforms offer many advantages for detection of various pathogens including portability, automation, speed, cost, and efficiency. In this review, we provide an overview of the recent trends for POC diagnostics of infectious diseases with focus on portable platforms. We review here the present status of POC platforms, emphasizing in period of the past three years, then extrapolate their advance into the future applications for diagnosis of infectious pathogens.
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Affiliation(s)
- Mohammad Zarei
- Department of Chemical and Civil Engineering, University of Kurdistan, Sanandaj, P.O. Box 66177, Kurdistan Province 66618-36336, Iran.
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99
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Walsh DI, Dydek EV, Lock JY, Carlson TL, Carrier RL, Kong DS, Cabrera CR, Thorsen T. Emulation of Colonic Oxygen Gradients in a Microdevice. SLAS Technol 2017; 23:164-171. [PMID: 29186668 DOI: 10.1177/2472630317743425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Gut-on-a-chip in vitro modeling is an emerging field, as the human gut epithelium and gut microbiome have been recently identified as novel drug targets for a wide variety of diseases. Realistic in vitro gut models require a variety of precise environmental cues, such as chemical and gas gradients, in combination with substrates like mucus that support the growth of microbial communities. This technical brief describes a microfluidic architecture capable of developing a physiologically relevant oxygen gradient that emulates the oxygen profile proximal to the epithelial inner lining of the human colon. The device generates stable and repeatable defined oxygen gradients from 0% to 4 % partial pressure O2 over a length scale of hundreds of microns, and was applied to study the effects of oxygenation on the structure of native mucus that lines the colon wall. Using simulation as a design tool for hybrid gas-liquid microfluidic devices enables on-chip creation of defined, physiologically oxygen gradients. These microfluidic architectures have powerful potential applications for gut physiology, including providing optimal oxygenation conditions for the culture of mammalian epithelial cells in the gut lining, as well as creating a realistic mimic of the oxygen gradient found in the intestinal lumen for complex microbiome cultures.
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Affiliation(s)
| | | | - Jaclyn Y Lock
- 2 Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Taylor L Carlson
- 3 Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Rebecca L Carrier
- 2 Department of Bioengineering, Northeastern University, Boston, MA, USA.,3 Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - David S Kong
- 1 MIT-Lincoln Laboratory, Lexington, MA, USA.,4 MIT Media Laboratory, Cambridge, MA, USA
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100
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Aleklett K, Kiers ET, Ohlsson P, Shimizu TS, Caldas VE, Hammer EC. Build your own soil: exploring microfluidics to create microbial habitat structures. ISME JOURNAL 2017; 12:312-319. [PMID: 29135971 PMCID: PMC5776464 DOI: 10.1038/ismej.2017.184] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/25/2017] [Accepted: 09/15/2017] [Indexed: 11/23/2022]
Abstract
Soil is likely the most complex ecosystem on earth. Despite the global importance and extraordinary diversity of soils, they have been notoriously challenging to study. We show how pioneering microfluidic techniques provide new ways of studying soil microbial ecology by allowing simulation and manipulation of chemical conditions and physical structures at the microscale in soil model habitats.
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Affiliation(s)
| | - E Toby Kiers
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Pelle Ohlsson
- Department of Biomedical Engineering, Lund University, Lund, Sweden
| | | | - Victor Ea Caldas
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,AMOLF Institute, Amsterdam, The Netherlands
| | - Edith C Hammer
- Department of Microbial Ecology, Lund University, Lund, Sweden
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