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Saqib M, Tufan Y, Orsel ZC, Ercan B, Erdem EY. Biocompatible Janus microparticle synthesis in a microfluidic device. Biomed Microdevices 2024; 26:31. [PMID: 38951313 DOI: 10.1007/s10544-024-00711-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2024] [Indexed: 07/03/2024]
Abstract
Janus particles are popular in recent years due to their anisotropic physical and chemical properties. Even though there are several established synthesis methods for Janus particles, microfluidics-based methods are convenient and reliable due to low reagent consumption, monodispersity of the resultant particles and efficient control over reaction conditions. In this work a simple droplet-based microfluidic technique is utilized to synthesize magnetically anisotropic TiO2-Fe2O3 Janus microparticles. Two droplets containing reagents for Janus particle were merged by using an asymmetric device such that the resulting droplet contained the constituents within its two hemispheres distinct from each other. The synthesized Janus particles were observed under the optical microscope and the scanning electron microscope. Moreover, a detailed in vitro characterization of these particles was completed, and it was shown that these particles have a potential use for biomedical applications.
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Affiliation(s)
- Muhammad Saqib
- Mechanical Engineering Department, Bilkent University, Ankara, Türkiye
| | - Yiğithan Tufan
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Türkiye
| | - Z Cemre Orsel
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Türkiye
| | - Batur Ercan
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Türkiye
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Türkiye
- Biomedical Engineering Program, Middle East Technical University, Ankara, Türkiye
| | - E Yegan Erdem
- Mechanical Engineering Department, Bilkent University, Ankara, Türkiye.
- UNAM, National Nanotechnology Research Center, Ankara, Türkiye.
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2
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Ferreira M, Carvalho V, Ribeiro J, Lima RA, Teixeira S, Pinho D. Advances in Microfluidic Systems and Numerical Modeling in Biomedical Applications: A Review. MICROMACHINES 2024; 15:873. [PMID: 39064385 PMCID: PMC11279158 DOI: 10.3390/mi15070873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/29/2024] [Accepted: 06/29/2024] [Indexed: 07/28/2024]
Abstract
The evolution in the biomedical engineering field boosts innovative technologies, with microfluidic systems standing out as transformative tools in disease diagnosis, treatment, and monitoring. Numerical simulation has emerged as a tool of increasing importance for better understanding and predicting fluid-flow behavior in microscale devices. This review explores fabrication techniques and common materials of microfluidic devices, focusing on soft lithography and additive manufacturing. Microfluidic systems applications, including nucleic acid amplification and protein synthesis, as well as point-of-care diagnostics, DNA analysis, cell cultures, and organ-on-a-chip models (e.g., lung-, brain-, liver-, and tumor-on-a-chip), are discussed. Recent studies have applied computational tools such as ANSYS Fluent 2024 software to numerically simulate the flow behavior. Outside of the study cases, this work reports fundamental aspects of microfluidic simulations, including fluid flow, mass transport, mixing, and diffusion, and highlights the emergent field of organ-on-a-chip simulations. Additionally, it takes into account the application of geometries to improve the mixing of samples, as well as surface wettability modification. In conclusion, the present review summarizes the most relevant contributions of microfluidic systems and their numerical modeling to biomedical engineering.
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Affiliation(s)
- Mariana Ferreira
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal; (M.F.); (D.P.)
| | - Violeta Carvalho
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal; (M.F.); (D.P.)
- LABBELS—Associate Laboratory, 4800-058 Guimaraes, Portugal;
- MEtRICs, Mechanical Engineering Department, University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal;
- ALGORITMI Center/LASI, University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal
| | - João Ribeiro
- Instituto Politécnico de Bragança, 5300-052 Bragança, Portugal;
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Campus Santa Apolónia, 5300-253 Bragança, Portugal
- CIMO—Mountain Research Center, Campus Santa Apolónia, 5300-253 Bragança, Portugal
| | - Rui A. Lima
- MEtRICs, Mechanical Engineering Department, University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal;
- CEFT—Transport Phenomena Research Center, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | | | - Diana Pinho
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimaraes, Portugal; (M.F.); (D.P.)
- LABBELS—Associate Laboratory, 4800-058 Guimaraes, Portugal;
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3
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Reinken H, Menzel AM. Vortex Pattern Stabilization in Thin Films Resulting from Shear Thickening of Active Suspensions. PHYSICAL REVIEW LETTERS 2024; 132:138301. [PMID: 38613265 DOI: 10.1103/physrevlett.132.138301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/17/2024] [Accepted: 02/29/2024] [Indexed: 04/14/2024]
Abstract
The need for structuring on micrometer scales is abundant, for example, in view of phononic applications. We here outline a novel approach based on the phenomenon of active turbulence on the mesoscale. As we demonstrate, a shear-thickening carrier fluid of active microswimmers intrinsically stabilizes regular vortex patterns of otherwise turbulent active suspensions. The fluid self-organizes into a periodically structured nonequilibrium state. Introducing additional passive particles of intermediate size leads to regular spatial organization of these objects. Our approach opens a new path toward functionalization through patterning of thin films and membranes.
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Affiliation(s)
- Henning Reinken
- Institut für Physik, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Andreas M Menzel
- Institut für Physik, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
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Mehraji S, DeVoe DL. Microfluidic synthesis of lipid-based nanoparticles for drug delivery: recent advances and opportunities. LAB ON A CHIP 2024; 24:1154-1174. [PMID: 38165786 DOI: 10.1039/d3lc00821e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Microfluidic technologies are revolutionizing the synthesis of nanoscale lipid particles and enabling new opportunities for the production of lipid-based nanomedicines. By harnessing the benefits of microfluidics for controlling diffusive and advective transport within microfabricated flow cells, microfluidic platforms enable unique capabilities for lipid nanoparticle synthesis with precise and tunable control over nanoparticle properties. Here we present an assessment of the current state of microfluidic technologies for lipid-based nanoparticle and nanomedicine production. Microfluidic techniques are discussed in the context of conventional production methods, with an emphasis on the capabilities of microfluidic systems for controlling nanoparticle size and size distribution. Challenges and opportunities associated with the scaling of manufacturing throughput are discussed, together with an overview of emerging microfluidic methods for lipid nanomedicine post-processing. The impact of additive manufacturing on current and future microfluidic platforms is also considered.
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Affiliation(s)
- Sima Mehraji
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD 20742, USA
| | - Don L DeVoe
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA.
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD 20742, USA
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5
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Imran JH, Shourav MK, Kim JK. Integrated Point-of-Care Immune Cell Analyzer with Rapid Blood Sample Reaction and Wide Field-of-View Detection. Anal Chem 2024; 96:1640-1650. [PMID: 38247122 DOI: 10.1021/acs.analchem.3c04503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
The development of affordable, reliable, and rapid diagnostic devices is crucial for monitoring immunological responses using a drop of blood. However, conventional automated diagnostic devices typically involve expensive and impractical robotic fluid-handling approaches. Herein, we developed an integrated cell analyzer comprising a cylindrical sample cartridge connected to a direct current motor and a compact fluorescence imaging module. Sample mixing and loading are performed automatically by a programmable sequence of single motor rotation controlled by an Android application. Two distinct stained immune cell samples can be identified by using two types of fluorescence imaging modes. The effectiveness of mixing performance in antigen-antibody (Ag-Ab) reactions was assessed through a compound objective lens that collects weak fluorescence emitted by the cell membrane. Active mixing with bidirectional rotation of the cartridge in a confined space shortened the Ag-Ab reaction time by a factor of 3.3 and achieved cell counting with higher accuracy while reducing reagent consumption by 4 times compared to the conventional incubation method. High-intensity fluorescence images of cells labeled with a nucleic acid stain were acquired through a single-lens-based fluorescence imaging module with a large field of view (FOV) in an unconventional detection chamber with a curved substrate. Compared with a flat chamber, the curved detection chamber reduces the effects of field curvature and provides aberration-free wide-FOV images, even with a simple lens. Our integrated cell analyzer thus offers a practical and cost-effective solution for monitoring patient immune responses in point-of-care settings.
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Affiliation(s)
- Jakir Hossain Imran
- Department of Mechanical Engineering, Graduate School, Kookmin University, Seoul 02707, Republic of Korea
| | - Mohiuddin Khan Shourav
- Wilmer Eye Institute, Department of Ophthalmology, Johns Hopkins University, Baltimore, Maryland 21231, United States
| | - Jung Kyung Kim
- School of Mechanical Engineering, Kookmin University, Seoul 02707, Republic of Korea
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Sharma MK, Leong XN, Koh CA, Hartman RL. The crystal orientation of THF clathrates in nano-confinement by in situ polarized Raman spectroscopy. LAB ON A CHIP 2024. [PMID: 38214152 DOI: 10.1039/d3lc00884c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Gas hydrates form at high pressure and low temperatures in marine sediments and permafrost regions of the earth. Despite forming in nanoporous structures, gas hydrates have been extensively studied only in bulk. Understanding nucleation and growth of gas hydrates in nonporous confinement can help create ways for storage and utilization as a future energy source. Herein, we introduce a new method for studying crystal orientation/tilt during tetrahydrofuran (THF) hydrate crystallization under the influence of nano-confinement using polarized Raman spectroscopy. Uniform cylindrical nanometer size pores of anodic aluminum oxide (AAO) are used as a model nano-confinement, and hydrate experiments are performed in a glass microsystem for control of the flash hydrate nucleation kinetics and analysis via in situ polarized Raman spectroscopy. The average THF hydrate crystal tilt of 56 ± 1° and 30.5 ± 0.5° were observed for the 20 nm and 40 nm diameter pores, respectively. Crystal tilt observed in 20 and 40-nanometer-size pores was proportional to the pore diameter, resulting in lower tilt relative to the axis of the confinement at larger diameter pores. The results indicate that the hydrates nucleation and growth mechanism can depend on the nanoconfinement size. A 1.6 ± 0.01 °C to 1.8 ± 0.01 °C depression in melting point compared to the bulk is predicted using the Gibbs-Thomson equation as a direct effect of nucleation in confinement on the hydrate properties.
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Affiliation(s)
- Mrityunjay K Sharma
- Department of Chemical & Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY, 11201, USA.
| | - Xin Ning Leong
- Department of Chemical & Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY, 11201, USA.
| | - Carolyn A Koh
- Center for Hydrate Research, Department of Chemical & Biological Engineering, Colorado School of Mines, Golden, CO, 80401, USA
| | - Ryan L Hartman
- Department of Chemical & Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY, 11201, USA.
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Saffar Y, Kashanj S, Nobes DS, Sabbagh R. The Physics and Manipulation of Dean Vortices in Single- and Two-Phase Flow in Curved Microchannels: A Review. MICROMACHINES 2023; 14:2202. [PMID: 38138371 PMCID: PMC10745399 DOI: 10.3390/mi14122202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023]
Abstract
Microchannels with curved geometries have been employed for many applications in microfluidic devices in the past decades. The Dean vortices generated in such geometries have been manipulated using different methods to enhance the performance of devices in applications such as mixing, droplet sorting, and particle/cell separation. Understanding the effect of the manipulation method on the Dean vortices in different geometries can provide crucial information to be employed in designing high-efficiency microfluidic devices. In this review, the physics of Dean vortices and the affecting parameters are summarized. Various Dean number calculation methods are collected and represented to minimize the misinterpretation of published information due to the lack of a unified defining formula for the Dean dimensionless number. Consequently, all Dean number values reported in the references are recalculated to the most common method to facilitate comprehension of the phenomena. Based on the converted information gathered from previous numerical and experimental studies, it is concluded that the length of the channel and the channel pathline, e.g., spiral, serpentine, or helix, also affect the flow state. This review also provides a detailed summery on the effect of other geometric parameters, such as cross-section shape, aspect ratio, and radius of curvature, on the Dean vortices' number and arrangement. Finally, considering the importance of droplet microfluidics, the effect of curved geometry on the shape, trajectory, and internal flow organization of the droplets passing through a curved channel has been reviewed.
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Affiliation(s)
| | | | | | - Reza Sabbagh
- Mechanical Engineering Department, University of Alberta, Edmonton, AB T6G 2R3, Canada; (Y.S.); (S.K.); (D.S.N.)
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Honda K, Fujiwara K, Hasegawa K, Kaneko A, Abe Y. Coalescence and mixing dynamics of droplets in acoustic levitation by selective colour imaging and measurement. Sci Rep 2023; 13:19590. [PMID: 37949912 PMCID: PMC10638323 DOI: 10.1038/s41598-023-46008-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023] Open
Abstract
Acoustic levitation is well-suited to 'lab-on-a-drop' contactless chemical analysis of droplets. Rapid mixing is of fundamental importance in lab-on-a-drop platforms and many other applications involving droplet manipulation. Small droplets, however, have low Reynolds numbers; thus, mixing via turbulence is not possible. Inducing surface oscillation is effective in this regard, however, the relationship between internal flow and mixing dynamics of droplets remains unclear. In this study, we conducted a set of simultaneous optical measurements to assess both the flow field and the distribution of fluid components within acoustically levitated droplets. To achieve this, we developed a technique to selectively separate fluorescent particles within each fluid, permitting the measurement of the concentration field based on the data from the discrete particle distribution. This approach revealed a relationship between the mixing process and the internal flow caused by surface oscillation. Thus, the internal flow induced by surface oscillation could enhance droplet mixing. Our findings will be conducive to the application and further development of lab-on-a-drop devices.
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Affiliation(s)
- Kota Honda
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, 305-8573, Japan
| | - Kota Fujiwara
- Graduate School of Science and Technology, University of Tsukuba, Tsukuba, 305-8573, Japan
| | - Koji Hasegawa
- Department of Mechanical Engineering, Kogakuin University, Tokyo, 163-8677, Japan
| | - Akiko Kaneko
- Institute of Systems and Information Engineering, University of Tsukuba, Tsukuba, 305-8573, Japan.
| | - Yutaka Abe
- Professor Emeritus, University of Tsukuba, Tsukuba, 305-8573, Japan
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Cha B, Lee SH, Iqrar SA, Yi HG, Kim J, Park J. Rapid acoustofluidic mixing by ultrasonic surface acoustic wave-induced acoustic streaming flow. ULTRASONICS SONOCHEMISTRY 2023; 99:106575. [PMID: 37683414 PMCID: PMC10495656 DOI: 10.1016/j.ultsonch.2023.106575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/18/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023]
Abstract
Ultrasonic surface acoustic wave (SAW)-induced acoustic streaming flow (ASF) has been utilized for microfluidic flow control, patterning, and mixing. Most previous research employed cross-type SAW acousto-microfluidic mixers, in which the SAWs propagated perpendicular to the flow direction. In this configuration, the flow mixing was induced predominantly by the horizontal component of the acoustic force, which was usually much smaller than the vertical component, leading to energy inefficiency and limited controllability. Here, we propose a vertical-type ultrasonic SAW acousto-microfluidic mixer to achieve rapid flow mixing with improved efficiency and controllability. We conducted in-depth numerical and experimental investigations of the vertical-type SAW-induced ASF to elucidate the acousto-hydrodynamic phenomenon under varying conditions of total flow rate, acoustic wave amplitude, and fluid viscosity conditions. We conducted computational fluid dynamics simulations for numerical flow visualization and utilized micro-prism-embedded microchannels for experimental flow visualization for the vertical SAW-induced ASF. We found that the SAW-induced vortices served as a hydrodynamic barrier for the co-flow streams for controlled flow mixing in the proposed device. For proof-of-concept application, we performed chemical additive-free rapid red blood cell lysis and achieved rapid cell lysis with high lysis efficiency based on the physical interactions of the suspended cells with the SAW-induced acoustic vortical flows. We believe that the proposed vertical-type ultrasonic SAW-based mixer can be broadly utilized for various microfluidic applications that require rapid, controlled flow mixing.
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Affiliation(s)
- Beomseok Cha
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Song Ha Lee
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Syed Atif Iqrar
- College of Engineering and Physical Sciences, Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom
| | - Hee-Gyeong Yi
- Department of Convergence Biosystems Engineering, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jangho Kim
- Department of Convergence Biosystems Engineering, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jinsoo Park
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea.
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Saravanakumar SM, Cicek PV. Microfluidic Mixing: A Physics-Oriented Review. MICROMACHINES 2023; 14:1827. [PMID: 37893264 PMCID: PMC10609072 DOI: 10.3390/mi14101827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/22/2023] [Accepted: 09/24/2023] [Indexed: 10/29/2023]
Abstract
This comprehensive review paper focuses on the intricate physics of microfluidics and their application in micromixing techniques. Various methods for enhancing mixing in microchannels are explored, with a keen emphasis on the underlying fluid dynamics principles. Geometrical micromixers employ complex channel designs to induce fluid-fluid interface distortions, yielding efficient mixing while retaining manufacturing simplicity. These methods synergize effectively with external techniques, showcasing promising potential. Electrohydrodynamics harnesses electrokinetic phenomena like electroosmosis, electrophoresis, and electrothermal effects. These methods offer dynamic control over mixing parameters via applied voltage, frequency, and electrode positioning, although power consumption and heating can be drawbacks. Acoustofluidics leverages acoustic waves to drive microstreaming, offering localized yet far-reaching effects. Magnetohydrodynamics, though limited in applicability to certain fluids, showcases potential by utilizing magnetic fields to propel mixing. Selecting an approach hinges on trade-offs among complexity, efficiency, and compatibility with fluid properties. Understanding the physics of fluid behavior and rationalizing these techniques aids in tailoring the most suitable micromixing solution. In a rapidly advancing field, this paper provides a consolidated understanding of these techniques, facilitating the informed choice of approach for specific microfluidic mixing needs.
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Affiliation(s)
| | - Paul-Vahe Cicek
- Microtechnologies Integration & Convergence Research Group, Université du Québec à Montréal (UQAM), Montreal, QC H2X 3Y7, Canada
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11
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Mathews HF, Pieper MI, Jung SH, Pich A. Compartmentalized Polyampholyte Microgels by Depletion Flocculation and Coacervation of Nanogels in Emulsion Droplets. Angew Chem Int Ed Engl 2023; 62:e202304908. [PMID: 37387670 DOI: 10.1002/anie.202304908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 07/01/2023]
Abstract
In pH-responsive drug carriers, the distribution of charges has been proven to affect delivery efficiency but is difficult to control and verify. Herein, we fabricate polyampholyte nanogel-in-microgel colloids (NiM-C) and show that the arrangement of the nanogels (NG) can easily be manipulated by adapting synthesis conditions. Positively and negatively charged pH-responsive NG are synthesized by precipitation polymerization and labelled with different fluorescent dyes. The obtained NG are integrated into microgel (MG) networks by subsequent inverse emulsion polymerization in droplet-based microfluidics. By confocal laser scanning microscopy (CLSM), we verify that depending on NG concentration, pH value and ionic strength, NiM-C with different NG arrangements are obtained, including Janus-like phase-separation of NG, statistical distribution of NG, and core-shell arrangements. Our approach is a major step towards uptake and release of oppositely charged (drug) molecules.
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Affiliation(s)
- Hannah F Mathews
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstr. 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Maria I Pieper
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstr. 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Se-Hyeong Jung
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstr. 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
- Laboratory for Soft Materials and Interfaces, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
| | - Andrij Pich
- DWI-Leibniz Institute for Interactive Materials, RWTH Aachen University, Forckenbeckstr. 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
- Aachen Maastricht Institute for Biobased Materials (AMIBM), Brightlands Chemelot Campus, Maastricht University, 6167 RD, Geleen, The Netherlands
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12
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Yuan W, Yuan H, Jiao K, Zhu J, Lim EG, Mitrovic I, Duan S, Wang Y, Cong S, Zhao C, Sun J, Liu X, Song P. Facile Microembossing Process for Microchannel Fabrication for Nanocellulose-Paper-Based Microfluidics. ACS APPLIED MATERIALS & INTERFACES 2023; 15:6420-6430. [PMID: 36693010 DOI: 10.1021/acsami.2c19354] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nanofibrillated cellulose paper (nanopaper) has gained growing interest as one promising substrate material for paper-based microfluidics, thanks to its ultrasmooth surface, high optical transparency, uniform nanofiber matrix with nanoscale porosity, and tunable chemical properties. Recently, research on nanopaper-based microfluidics has quickly advanced; however, the current technique of patterning microchannels on nanopaper (i.e., 3D printing, spray coating, or manual cutting and sticking), that is fundamental for application development, still has some limitations, such as ease-of-contamination, and more importantly, only enabling millimeter-scale channels. This paper reports a facile process that leverages the simple operations of microembossing with the convenient plastic micro-molds, for the first time, patterning nanopaper microchannels downing to 200 μm, which is 4 times better than the existing methods and is time-saving (<45 mins). We also optimized the patterning parameters and provided one quick look-up table as the guideline for application developments. As proof-of-concept, we first demonstrated two fundamental microfluidic devices on nanopaper, the laminar-mixer and droplet generator, and two functional nanopaper-based analytical devices (NanoPADs) for glucose and Rhodamine B (RhB) sensing based on optical colorimetry and surface-enhanced Raman spectroscopy, respectively. The two NanoPADs showed outstanding performance with low limits of detection (2 mM for glucose and 19fM for RhB), which are 1.25× and 500× fold improvement compared to the previously reported values. This can be attributed to our newly developed highly accurate microchannel patterning process that enables high integration and fine-tunability of the NanoPADs along with the superior optical properties of nanopaper.
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Affiliation(s)
- Wenwen Yuan
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Hang Yuan
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
| | - Keran Jiao
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
| | - Jia Zhu
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- School of Intelligent Manufacturing and Transportation, Suzhou City University, Suzhou215000, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Eng Gee Lim
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Ivona Mitrovic
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Sixuan Duan
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Yongjie Wang
- School of Science, Harbin Institute of Technology - Shenzhen, Shenzhen518055, China
| | - Shan Cong
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei230026, China
| | - Chun Zhao
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Jie Sun
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
| | - Xinyu Liu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, OntarioM5S 2E8, Canada
| | - Pengfei Song
- School of Advanced Technology, Xi'an Jiaotong - Liverpool University, Suzhou215123, China
- Department of Electrical Engineering and Electronics, University of Liverpool, LiverpoolL69 7ZX, U.K
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Zhang W, Yao F, Li WF, Liu HF, Wang FC. Effect of Chamber Depth Modifications on Flow Regimes and Mixing Performance in Cross-Shaped Mixers. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Wei Zhang
- Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai200237, China
| | - Feng Yao
- Shanghai Engineering Research Center of Space Engine, Shanghai Institute of Space Propulsion, Shanghai201112, China
| | - Wei-feng Li
- Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai200237, China
| | - Hai-feng Liu
- Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai200237, China
| | - Fu-chen Wang
- Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai200237, China
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14
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Zhang X, Qian Z, Jiang M, Li W, Huang Y, Men Y. Design and High-Resolution Analysis of an Efficient Periodic Split-and-Recombination Microfluidic Mixer. MICROMACHINES 2022; 13:1720. [PMID: 36296073 PMCID: PMC9607611 DOI: 10.3390/mi13101720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/06/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
We developed a highly efficient passive mixing device based on a split-and-recombine (SAR) configuration. This micromixer was constructed by simply bonding two identical microfluidic periodical open-trench patterns face to face. The structure parameters of periodical units were optimized through numerical simulation to facilitate the mixing efficiency. Despite the simplicity in design and fabrication, it provided rapid mixing performance in both experiment and simulation conditions. To better illustrate the mixing mechanism, we developed a novel scheme to achieve high-resolution confocal imaging of serial channel cross-sections to accurately characterize the mixing details and performance after each SAR cycle. Using fluorescent IgG as an indicator, nearly complete mixing was achieved using only four SAR cycles in an aqueous solution within a device's length of less than 10 mm for fluids with a Péclet number up to 8.7 × 104. Trajectory analysis revealed that each SAR cycle transforms the input fluids using three synergetic effects: rotation, combination, and stretching to increase the interfaces exponentially. Furthermore, we identified that the pressure gradients in the parallel plane of the curved channel induced vertical convection, which is believed to be the driving force underlying these effects to accelerate the mixing process.
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Affiliation(s)
- Xiannian Zhang
- School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China
| | - Zhenwei Qian
- School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China
| | - Mengcheng Jiang
- Biomedical Pioneering Innovation Center (BIOPIC), Peking-Tsinghua Center for Life Sciences, Beijing Advanced Innovation Center for Genomics (ICG), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Wentao Li
- Biomedical Pioneering Innovation Center (BIOPIC), Peking-Tsinghua Center for Life Sciences, Beijing Advanced Innovation Center for Genomics (ICG), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yanyi Huang
- Biomedical Pioneering Innovation Center (BIOPIC), Peking-Tsinghua Center for Life Sciences, Beijing Advanced Innovation Center for Genomics (ICG), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yongfan Men
- Research Center for Biomedical Optics and Molecular Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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15
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Ding L, Razavi Bazaz S, Shrestha J, A. Amiri H, Mas-hafi S, Banerjee B, Vesey G, Miansari M, Ebrahimi Warkiani M. Rapid and Continuous Cryopreservation of Stem Cells with a 3D Micromixer. MICROMACHINES 2022; 13:1516. [PMID: 36144139 PMCID: PMC9500807 DOI: 10.3390/mi13091516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/04/2022] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Cryopreservation is the final step of stem cell production before the cryostorage of the product. Conventional methods of adding cryoprotecting agents (CPA) into the cells can be manual or automated with robotic arms. However, challenging issues with these methods at industrial-scale production are the insufficient mixing of cells and CPA, leading to damage of cells, discontinuous feeding, the batch-to-batch difference in products, and, occasionally, cross-contamination. Therefore, the current study proposes an alternative way to overcome the abovementioned challenges; a highly efficient micromixer for low-cost, continuous, labour-free, and automated mixing of stem cells with CPA solutions. Our results show that our micromixer provides a more homogenous mixing of cells and CPA compared to the manual mixing method, while the cell properties, including surface markers, differentiation potential, proliferation, morphology, and therapeutic potential, are well preserved.
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Affiliation(s)
- Lin Ding
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Sajad Razavi Bazaz
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Jesus Shrestha
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Hoseyn A. Amiri
- Micro+Nanosystems & Applied Biophysics Laboratory, Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol 47148-71167, Iran
- Cell Science Research Center, Department of Cancer Medicine, Royan Institute for Stem Cell Biology and Technology, Isar 11, Babol 47138-18983, Iran
| | - Sima Mas-hafi
- Micro+Nanosystems & Applied Biophysics Laboratory, Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol 47148-71167, Iran
- Cell Science Research Center, Department of Cancer Medicine, Royan Institute for Stem Cell Biology and Technology, Isar 11, Babol 47138-18983, Iran
| | | | - Graham Vesey
- Regeneus Ltd., Paddington, Sydney, NSW 2021, Australia
| | - Morteza Miansari
- Micro+Nanosystems & Applied Biophysics Laboratory, Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol 47148-71167, Iran
- Cell Science Research Center, Department of Cancer Medicine, Royan Institute for Stem Cell Biology and Technology, Isar 11, Babol 47138-18983, Iran
| | - Majid Ebrahimi Warkiani
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
- Institute of Molecular Medicine, Sechenov University, 119991 Moscow, Russia
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16
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Pryazhnikov MI, Yakimov AS, Denisov IA, Pryazhnikov AI, Minakov AV, Belobrov PI. Fluid Viscosity Measurement by Means of Secondary Flow in a Curved Channel. MICROMACHINES 2022; 13:1452. [PMID: 36144075 PMCID: PMC9502554 DOI: 10.3390/mi13091452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/25/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
This article presents a new approach to determining the viscosity of Newtonian fluid. The approach is based on the analysis of the secondary Dean flow in a curved channel. The study of the flow patterns of water and aqueous solutions of glycerin in a microfluidic chip with a U-microchannel was carried out. The advantages of a microfluidic viscometer based on a secondary Dean flow are its simplicity, quickness, and high accuracy in determining the viscosity coefficient of a liquid. A viscosity image in a short movie represents fluid properties. It is revealed that the viscosity coefficient can be determined by the dependence of the recirculation angle of the secondary Dean flow. The article provides a correlation between the Dean number and the flow recirculation angle. The results of the field experiment, presented in the article, correlate with the data obtained using computational fluid dynamics and allow for selecting parameters to create microfluidic viscometers with a U-shaped microchannel.
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Affiliation(s)
- Maxim I. Pryazhnikov
- Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia
- Laboratory of Heat Exchange Control in Phase and Chemical Transformations, Kutateladze Institute of Thermophysics, 630090 Novosibirsk, Russia
| | - Anton S. Yakimov
- Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia
| | - Ivan A. Denisov
- Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia
| | - Andrey I. Pryazhnikov
- Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia
| | - Andrey V. Minakov
- Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia
- Laboratory of Heat Exchange Control in Phase and Chemical Transformations, Kutateladze Institute of Thermophysics, 630090 Novosibirsk, Russia
| | - Peter I. Belobrov
- Department of Biophysics, Siberian Federal University, 660041 Krasnoyarsk, Russia
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17
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Nguyen NK, Singha P, Dai Y, Rajan Sreejith K, Tran DT, Phan HP, Nguyen NT, Ooi CH. Controllable high-performance liquid marble micromixer. LAB ON A CHIP 2022; 22:1508-1518. [PMID: 35344578 DOI: 10.1039/d2lc00017b] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A liquid marble is a liquid droplet coated with a shell of microparticles. Liquid marbles have served as a unique microreactor for chemical reactions and cell culture. Mixing is an essential task for liquid marbles as a microreactor. However, the potential of liquid marble-based microreactors is significantly limited due to the lack of effective mixing strategies. Most mixing strategies used manual and contact-based actuation schemes. This paper reports the development of a manipulation scheme that induces fluid motion into a liquid marble, leading to enhanced mixing. By inducing rotation on a horizontal axis, we significantly increased the mixing rate by 27.6 times compared to a non-actuated liquid marble and reduced the reaction time by more than 10 times. The proposed method provides a simple, continuous, precise, and controllable high-performance mixing strategy on a liquid marble platform.
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Affiliation(s)
- Nhat-Khuong Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Pradip Singha
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Yuchen Dai
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Kamalalayam Rajan Sreejith
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Du Tuan Tran
- R&D Department, Bestmix Corporation, Binh Duong 820000, Vietnam
| | - Hoang-Phuong Phan
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
| | - Chin Hong Ooi
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan 4111, Queensland, Australia
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18
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Gkogkos G, Besenhard MO, Storozhuk L, Thi Kim Thanh N, Gavriilidis A. Fouling-proof triple stream 3D flow focusing based reactor: Design and demonstration for iron oxide nanoparticle co-precipitation synthesis. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117481] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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19
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Bonament A, Prel A, Sallese JM, Lallement C, Madec M. Analytic modelling of passive microfluidic mixers. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2022; 19:3892-3908. [PMID: 35341279 DOI: 10.3934/mbe.2022179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This paper deals with a new analytical model for microfluidic passive mixers. Two common approaches already exist for such a purpose. On the one hand, the resolution of the advection-diffusion-reaction equation (ADRE) is the first one and the closest to physics. However, ADRE is a partial differential equation that requires finite element simulations. On the other hand, analytical models based on the analogy between microfluidics and electronics have already been established. However, they rely on the assumption of homogeneous fluids, which means that the mixer is supposed to be long enough to obtain a perfect mixture at the output. In this paper, we derive an analytical model from the ADRE under several assumptions. Then we integrate these equations within the electronic-equivalent models. The resulting models computed the relationship between pressure and flow rate in the microfluidic circuit but also takes the concentration gradients that can appear in the direction perpendicular to the channel into account. The model is compared with the finite element simulation performed with COMSOL Multiphysics in several study cases. We estimate that the global error introduced by our model compared to the finite element simulation is less than 5% in every use case. In counterparts, the cost in terms of computational resources is drastically reduced. The analytical model can be implemented in a large range of modelling and simulation languages, including SPICE and hardware description language such as Verilog-AMS. This feature is very interesting in the context of the in silico prototyping of large-scale microfluidic devices or multi-physics devices involving microfluidic circuits, e.g. lab-on-chips.
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Affiliation(s)
- Alexi Bonament
- Laboratory of Engineer Sciences, Computer Science and Imagine (ICube), UMR 7357 (UniversitȦ de Strasbourg/Centre National de Recherche Scientifique), Strasbourg, France
| | - Alexis Prel
- Laboratory of Engineer Sciences, Computer Science and Imagine (ICube), UMR 7357 (UniversitȦ de Strasbourg/Centre National de Recherche Scientifique), Strasbourg, France
| | - Jean-Michel Sallese
- STI-IEL-Electronics Laboratory, Ecole Polytechnique FȦdȦrale de Lausanne (EPFL), Lausanne, Switzerland
| | - Christophe Lallement
- Laboratory of Engineer Sciences, Computer Science and Imagine (ICube), UMR 7357 (UniversitȦ de Strasbourg/Centre National de Recherche Scientifique), Strasbourg, France
| | - Morgan Madec
- Laboratory of Engineer Sciences, Computer Science and Imagine (ICube), UMR 7357 (UniversitȦ de Strasbourg/Centre National de Recherche Scientifique), Strasbourg, France
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20
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Yan L, Wang S, Cheng Y. Numerical Simulation of Mixing Process in a Splitting-and-Recombination Microreactor. FRONTIERS IN CHEMICAL ENGINEERING 2022. [DOI: 10.3389/fceng.2021.803861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The mixing process between miscible fluids in a splitting-and-recombination microreactor is analyzed numerically by solving the Navier–Stokes equation and species transfer equation. The commercial microreactor combines rectangular channels with comb-shaped inserts to achieve the splitting-and-recombination effect. The results show that the microreactor with three-layer standard inserts have the highest mixing rate as well as good mixing efficiency within a wide range of Reynolds numbers from 0.1 to 160. The size parameters of the inserts, both the ratio of the width of comb tooth (marked as l) and the spacing distance (marked as s) between two comb teeth, and the ratio of the vertical distance (marked as V) of comb teeth and the horizontal distance (marked as H) are essential for influencing the liquid–liquid mixing process at low Reynolds numbers (e.g., Re ≤ 2). With the increase of s/l from 1 to 4, the mixing efficiency drops from 0.99 to 0.45 at Re = 0.2. Similarly, the increase in V/H is not beneficial to promote the mixing between fluids. When the ratio of V/H changes from 10:10 to 10:4, the splitting and recombination cycles reduce so that the uniform mixing between different fluids can be hardly achieved. The width of comb tooth (marked as l) is 1 mm and the spacing distance (marked as s) between two comb teeth is 2 mm. The vertical distance (marked as V) of comb teeth and the horizontal distance (marked as H) are both 10 mm.
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21
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Catini A, Capuano R, Tancredi G, Dionisi G, Di Giuseppe D, Filippi J, Martinelli E, Di Natale C. A Lab-on-a-Chip Based Automatic Platform for Continuous Nitrites Sensing in Aquaculture. SENSORS 2022; 22:s22020444. [PMID: 35062404 PMCID: PMC8778806 DOI: 10.3390/s22020444] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/31/2021] [Accepted: 01/02/2022] [Indexed: 02/01/2023]
Abstract
In aquaculture, the density of fish stock, use of feeding, and surrounding environmental conditions can easily result in an excessive concentration of harmful compounds that require continuous monitoring. Chemical sensors are available for most of these compounds, however, operative conditions and continuous monitoring in water make the development of sensors suitable for long and unattended deployments difficult. A possible solution is the development of engineered automatic labs where the uptake of sample and the contact with water is reduced and the use of a minimal quantity of reagents enables the implementation of reliable chemical assays. In this paper, a platform for automatic chemical assays is presented. The concept is demonstrated with the detection of nitrites based on the well-known colorimetric Griess reaction. The platform is centered around a lab-on-a-chip where reagents and water samples are mixed. The color of the reaction product is measured with low-cost optoelectronic components. Results show the feasibility of the approach with a minimum detectable concentration of about 0.1 mg/L which is below the tolerance level for aquaculture farms.
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22
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Amiroudine S, Demekhin EA, Shelistov VS, Ganchenko GS. Electric-permittivity-based instability of two dielectric miscible liquids under DC field. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2022; 45:1. [PMID: 34978626 DOI: 10.1140/epje/s10189-021-00157-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
This paper considers the mixing of two dielectric miscible viscous liquids with different electric permittivities bounded by solid walls in an external electric field normal to the interface of the liquids. The mutual diffusion of these two liquids leads to the formation of an unsteady self-similar 1D diffusion layer. This layer is found to be unstable to the perturbations of the interface. A special sophisticated mathematical approach in self-similar variables is developed to estimate its stability. The results of a linear stability theory are verified by direct numerical simulations of the full nonlinear problem. A mixing efficiency based on the separation amplitude and an optimal electric field strength to achieve the fastest mixing are proposed in the present study.
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Affiliation(s)
- S Amiroudine
- Institute of Mechanics and Engineering (I2M) CNRS, University of Bordeaux, 33400, Talence, France.
| | - E A Demekhin
- Department of Mathematics and Computer Science, Financial University, Krasnodar, Russian Federation, 350051
- Laboratory of Micro- and Nanoscale Electro- and Hydrodynamics, Financial University, Krasnodar, Russian Federation, 350051
- Laboratory of General Aeromechanics, Institute of Mechanics, Moscow State University, Moscow, Russian Federation, 119192
| | - V S Shelistov
- Laboratory of Micro- and Nanoscale Electro- and Hydrodynamics, Financial University, Krasnodar, Russian Federation, 350051
| | - G S Ganchenko
- Laboratory of Micro- and Nanoscale Electro- and Hydrodynamics, Financial University, Krasnodar, Russian Federation, 350051
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23
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Micromachines: 5000th Publications Milestone. MICROMACHINES 2021; 12:mi12121573. [PMID: 34945422 PMCID: PMC8705782 DOI: 10.3390/mi12121573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 12/13/2021] [Indexed: 12/03/2022]
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Kheiri S, Kumacheva E, Young EWK. Computational Modelling and Big Data Analysis of Flow and Drug Transport in Microfluidic Systems: A Spheroid-on-a-Chip Study. Front Bioeng Biotechnol 2021; 9:781566. [PMID: 34888303 PMCID: PMC8650096 DOI: 10.3389/fbioe.2021.781566] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/27/2021] [Indexed: 12/17/2022] Open
Abstract
Microfluidic tumour spheroid-on-a-chip platforms enable control of spheroid size and their microenvironment and offer the capability of high-throughput drug screening, but drug supply to spheroids is a complex process that depends on a combination of mechanical, biochemical, and biophysical factors. To account for these coupled effects, many microfluidic device designs and operating conditions must be considered and optimized in a time- and labour-intensive trial-and-error process. Computational modelling facilitates a systematic exploration of a large design parameter space via in silico simulations, but the majority of in silico models apply only a small set of conditions or parametric levels. Novel approaches to computational modelling are needed to explore large parameter spaces and accelerate the optimization of spheroid-on-a-chip and other organ-on-a-chip designs. Here, we report an efficient computational approach for simulating fluid flow and transport of drugs in a high-throughput arrayed cancer spheroid-on-a-chip platform. Our strategy combines four key factors: i) governing physical equations; ii) parametric sweeping; iii) parallel computing; and iv) extensive dataset analysis, thereby enabling a complete “full-factorial” exploration of the design parameter space in combinatorial fashion. The simulations were conducted in a time-efficient manner without requiring massive computational time. As a case study, we simulated >15,000 microfluidic device designs and flow conditions for a representative multicellular spheroids-on-a-chip arrayed device, thus acquiring a single dataset consisting of ∼10 billion datapoints in ∼95 GBs. To validate our computational model, we performed physical experiments in a representative spheroid-on-a-chip device that showed excellent agreement between experimental and simulated data. This study offers a computational strategy to accelerate the optimization of microfluidic device designs and provide insight on the flow and drug transport in spheroid-on-a-chip and other biomicrofluidic platforms.
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Affiliation(s)
- Sina Kheiri
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | - Eugenia Kumacheva
- Department of Chemistry, University of Toronto, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Edmond W K Young
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
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25
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Koryakina IG, Afonicheva PK, Arabuli KV, Evstrapov AA, Timin AS, Zyuzin MV. Microfluidic synthesis of optically responsive materials for nano- and biophotonics. Adv Colloid Interface Sci 2021; 298:102548. [PMID: 34757247 DOI: 10.1016/j.cis.2021.102548] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 02/06/2023]
Abstract
Recently, nanomaterials demonstrating optical response under illumination, the so-called optically responsive nanoparticles (NPs), have found their broad application as optical switchers, gas adsorbents, data storage devices, and optical and biological sensors. Unique optical properties of such nanomaterials are strongly related to their chemical composition, geometrical parameters and morphology. Microfluidic approaches for NPs' synthesis allow overcoming the known critical stages in conventional synthesis of NPs due to a high rate of heat/mass transfer and precise regulation of synthesis conditions, which results in reproducible synthesis outcomes with the desired physico-chemical properties. Here, we review the recent advances in microfluidic approach for synthesis of optically responsive nanomaterials (plasmonic, photoluminescent, shape-changeable NPs), highlighting the general background of microfluidics, common considerations in the design of microfluidic chips (MFCs), and theoretical models of the NPs' formation mechanisms. Comparative analysis of microfluidic synthesis with conventional synthesis methods is provided further, along with the recent applications of optically responsive NPs in nano- and biophotonics.
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26
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A SAR Micromixer for Water-Water Mixing: Design, Optimization, and Analysis. Processes (Basel) 2021. [DOI: 10.3390/pr9111926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A numerical investigation of the mixing performance and fluid flow in a new split and recombine (SAR) Y−Uβ micromixer is presented in this work. A parameter called connecting angle βis varied from 0° to 90° to analyze the effect on the SAR process and mixing performance. Thenumerical data shows that the SAR process strongly depends on the connecting angle (β) and maximum efficiency (93%) can be achieved when the value of β is 45°. The Y−U45° the mixer also offers higher efficiency and lower pressure drop than a known SAR ‘H−C’ mixer irrespective of Reynolds numbers. The split and recombine process, the influence of secondary flow, and pressure drop characteristics at various Reynolds numbers are also studied. In addition, mixing effectiveness is also computed, and among all examined mixers, Y−U45° is by far the best performing one.
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27
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Erfan M, Gnambodoe-Capochichi M, Sabry YM, Khalil D, Leprince-Wang Y, Bourouina T. Spatiotemporal dynamics of nanowire growth in a microfluidic reactor. MICROSYSTEMS & NANOENGINEERING 2021; 7:77. [PMID: 34712489 PMCID: PMC8505653 DOI: 10.1038/s41378-021-00308-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 07/17/2021] [Accepted: 08/04/2021] [Indexed: 05/13/2023]
Abstract
Co-integration of nanomaterials into microdevices poses several technological challenges and presents numerous scientific opportunities that have been addressed in this paper by integrating zinc oxide nanowires (ZnO-NWs) into a microfluidic chamber. In addition to the applications of these combined materials, this work focuses on the study of the growth dynamics and uniformity of nanomaterials in a tiny microfluidic reactor environment. A unique experimental platform was built through the integration of a noninvasive optical characterization technique with the microfluidic reactor. This platform allowed the unprecedented demonstration of time-resolved and spatially resolved monitoring of the in situ growth of NWs, in which the chemicals were continuously fed into the microfluidic reactor. The platform was also used to assess the uniformity of NWs grown quickly in a 10-mm-wide microchamber, which was intentionally chosen to be 20 times wider than those used in previous attempts because it can accommodate applications requiring a large surface of interaction while still taking advantage of submillimeter height. Further observations included the effects of varying the flow rate on the NW diameter and length in addition to a synergetic effect of continuous renewal of the growth solution and the confined environment of the chemical reaction.
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Affiliation(s)
- Mazen Erfan
- ESYCOM, CNRS UMR 9007, Université Gustave Eiffel, ESIEE Paris, Noisy-le-Grand, France
| | | | - Yasser M. Sabry
- Ain Shams University, Faculty of Engineering, ECE Department, Cairo, Egypt
| | - Diaa Khalil
- Ain Shams University, Faculty of Engineering, ECE Department, Cairo, Egypt
| | - Yamin Leprince-Wang
- ESYCOM, CNRS UMR 9007, Université Gustave Eiffel, ESIEE Paris, Noisy-le-Grand, France
| | - Tarik Bourouina
- ESYCOM, CNRS UMR 9007, Université Gustave Eiffel, ESIEE Paris, Noisy-le-Grand, France
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Liao Y, Mechulam Y, Lassalle-Kaiser B. A millisecond passive micromixer with low flow rate, low sample consumption and easy fabrication. Sci Rep 2021; 11:20119. [PMID: 34635693 PMCID: PMC8505571 DOI: 10.1038/s41598-021-99471-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/17/2021] [Indexed: 11/30/2022] Open
Abstract
Fast mixing of small volumes of solutions in microfluidic devices is essential for an accurate control and observation of the dynamics of a reaction in biological or chemical studies. It is often, however, a challenging task, as the Reynolds number (Re) in microscopic devices is typically < 100. In this report, we detail a novel mixer based on the “staggered herring bone” (SHB) pattern and “split-recombination” strategies with an optimized geometry, the periodic rotation of the flow structure can be controlled and recombined in a way that the vortices and phase shifts of the flow induce intertwined lamellar structures, thus increasing the contact surface and enhancing mixing. The optimization improves the mixing while using a low flow rate, hence a small volume for mixing and moderate pressure drops. The performances of the patterns were first simulated using COMSOL Multiphysics under different operating conditions. The simulation indicates that at very low flow rate (1–12 µL·min−1) and Re (3.3–40), as well as a very small working volume (~ 3 nL), a very good mixing (~ 98%) can be achieved in the ms time range (4.5–78 ms). The most promising design was then visualized experimentally, showing results that are consistent with the outcomes of the simulations. Importantly, the devices were fabricated using a classical soft-lithography method, as opposed to additive manufacturing often used to generate complex mixing structures. This new device minimizes the sample consumption and could therefore be applied for studies using precious samples.
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Affiliation(s)
- Yuanyuan Liao
- Synchrotron SOLEIL, l'Orme des Merisiers, 91192, Gif-sur-Yvette, France. .,IamFluidics BV, High Tech Factory, De Veldmaat 17, 7522 NM, Enschede, The Netherlands.
| | - Yves Mechulam
- Laboratoire de Biologie Structurale de la Cellule, BIOC, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau Cedex, France
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Fabrication of Microparticles with Front-Back Asymmetric Shapes Using Anisotropic Gelation. MICROMACHINES 2021; 12:mi12091121. [PMID: 34577764 PMCID: PMC8466830 DOI: 10.3390/mi12091121] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/10/2021] [Accepted: 09/14/2021] [Indexed: 01/13/2023]
Abstract
Droplet-based microfluidics is a powerful tool for producing monodispersed micrometer-sized droplets with controlled sizes and shapes; thus, it has been widely applied in diverse fields from fundamental science to industries. Toward a simpler method for fabricating microparticles with front–back asymmetry in their shapes, we studied anisotropic gelation of alginate droplets, which occurs inside a flow-focusing microfluidic device. In the proposed method, sodium alginate (NaAlg) aqueous phase fused with a calcium chloride (CaCl2) emulsion dispersed in the organic phase just before the aqueous phase breaks up into the droplets. The fused droplet with a front–back asymmetric shape was generated, and the asymmetric shape was kept after geometrical confinement by a narrow microchannel was removed. The shape of the fused droplet depended on the size of prefused NaAlg aqueous phase and a CaCl2 emulsion, and the front–back asymmetry appeared in the case of the smaller emulsion size. The analysis of the velocity field inside and around the droplet revealed that the stagnation point at the tip of the aqueous phase also played an important role. The proposed mechanism will be potentially applicable as a novel fabrication technique of microparticles with asymmetric shapes.
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Sanchez Noriega JL, Chartrand NA, Valdoz JC, Cribbs CG, Jacobs DA, Poulson D, Viglione MS, Woolley AT, Van Ry PM, Christensen KA, Nordin GP. Spatially and optically tailored 3D printing for highly miniaturized and integrated microfluidics. Nat Commun 2021; 12:5509. [PMID: 34535656 PMCID: PMC8448845 DOI: 10.1038/s41467-021-25788-w] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 08/31/2021] [Indexed: 02/07/2023] Open
Abstract
Traditional 3D printing based on Digital Light Processing Stereolithography (DLP-SL) is unnecessarily limiting as applied to microfluidic device fabrication, especially for high-resolution features. This limitation is due primarily to inherent tradeoffs between layer thickness, exposure time, material strength, and optical penetration that can be impossible to satisfy for microfluidic features. We introduce a generalized 3D printing process that significantly expands the accessible spatially distributed optical dose parameter space to enable the fabrication of much higher resolution 3D components without increasing the resolution of the 3D printer. Here we demonstrate component miniaturization in conjunction with a high degree of integration, including 15 μm × 15 μm valves and a 2.2 mm × 1.1 mm 10-stage 2-fold serial diluter. These results illustrate our approach's promise to enable highly functional and compact microfluidic devices for a wide variety of biomolecular applications.
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Affiliation(s)
- Jose L Sanchez Noriega
- Electrical and Computer Engineering Department, Brigham Young University, Provo, UT, 84602, USA
| | - Nicholas A Chartrand
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Jonard Corpuz Valdoz
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Collin G Cribbs
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Dallin A Jacobs
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Daniel Poulson
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Matthew S Viglione
- Electrical and Computer Engineering Department, Brigham Young University, Provo, UT, 84602, USA
| | - Adam T Woolley
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Pam M Van Ry
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Kenneth A Christensen
- Chemistry and Biochemistry Department, Brigham Young University, Provo, UT, 84602, USA
| | - Gregory P Nordin
- Electrical and Computer Engineering Department, Brigham Young University, Provo, UT, 84602, USA.
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31
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Sierra T, Jang I, Noviana E, Crevillen AG, Escarpa A, Henry CS. Pump-Free Microfluidic Device for the Electrochemical Detection of α 1-Acid Glycoprotein. ACS Sens 2021; 6:2998-3005. [PMID: 34350757 DOI: 10.1021/acssensors.1c00864] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
α1-Acid glycoprotein (AGP) is a glycoprotein present in serum, which is associated with the modulation of the immune system in response to stress or injuries, and a biomarker for inflammatory diseases and cancers. Here, we propose a pump-free microfluidic device for the electrochemical determination of AGP. The microfluidic device utilizes capillary-driven flow and a passive mixing system to label the AGP with the Os (VI) complex (an electrochemical tag) inside the main channel, before delivering the products to the electrode surface. Furthermore, thanks to the resulting geometry, all the analytical steps can be carried out inside the device: labeling, washing, and detection by adsorptive transfer stripping square wave voltammetry. The microfluidic device exhibited a linear range from 500 to 2000 mg L-1 (R2 = 0.990) and adequate limit of detection (LOD = 231 mg L-1). Commercial serum samples were analyzed to demonstrate the success of the method, yielding recoveries around 83%. Due to its simplicity, low sample consumption, low cost, short analysis time, disposability, and portability, the proposed method can serve as a point-of-care/need testing device for AGP.
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Affiliation(s)
- Tania Sierra
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80526, United States
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala,
Alcala de Henares, Madrid E-28871, Spain
| | - Ilhoon Jang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80526, United States
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Korea
| | - Eka Noviana
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80526, United States
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Agustín G. Crevillen
- Department of Analytical Sciences, Faculty of Sciences, Universidad Nacional de Educación a Distancia (UNED), Madrid E-28040, Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala,
Alcala de Henares, Madrid E-28871, Spain
- Chemical Research Institute “Andrés M. del Río” (IQAR), University of Alcala, Alcala de Henares, Madrid E-28805, Spain
| | - Charles S. Henry
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80526, United States
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Chung CH, Lau CML, Sin DT, Chung JT, Zhang Y, Chau Y, Yao S. Droplet-Based Microfluidic Synthesis of Hydrogel Microparticles via Click Chemistry-Based Cross-Linking for the Controlled Release of Proteins. ACS APPLIED BIO MATERIALS 2021; 4:6186-6194. [DOI: 10.1021/acsabm.1c00509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Casper H.Y. Chung
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Chi Ming Laurence Lau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Dixon T. Sin
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Jin Teng Chung
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Yuzi Zhang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Ying Chau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Shuhuai Yao
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
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Magdalene DJ, Muthuselvam D, Pravinraj T. Microfluidics-based green synthesis of silver nanoparticle from the aqueous leaf extract of Ipomea quamoclit L. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01899-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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34
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Noviana E, Ozer T, Carrell CS, Link JS, McMahon C, Jang I, Henry CS. Microfluidic Paper-Based Analytical Devices: From Design to Applications. Chem Rev 2021; 121:11835-11885. [DOI: 10.1021/acs.chemrev.0c01335] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Eka Noviana
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, Indonesia 55281
| | - Tugba Ozer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey 34220
| | - Cody S. Carrell
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeremy S. Link
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Catherine McMahon
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ilhoon Jang
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Institute of Nano Science and Technology, Hanyang University, Seoul, South Korea 04763
| | - Charles S. Henry
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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35
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Elvira KS. Microfluidic technologies for drug discovery and development: friend or foe? Trends Pharmacol Sci 2021; 42:518-526. [PMID: 33994176 DOI: 10.1016/j.tips.2021.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 02/07/2023]
Abstract
There is a point in the evolution of every new technology when questions need to be asked regarding its usefulness and impact. Although microfluidic technologies have drastically decreased the scales at which laboratory processes can be performed and have enabled scientific advances that would have otherwise not been possible, it is time to consider whether these technologies are more disruptive than enabling. Here, my aims are to introduce researchers in the broad fields of drug discovery and development to the advantages and disadvantages of microfluidic technologies, to highlight current work showing how microfluidic technologies can be used at different stages in the drug discovery and development process, to discuss how we can transfer academic breakthroughs in the field of microfluidic technologies to industrial environments, and to examine whether microfluidic technologies have the potential to cause a fundamental paradigm shift in the way that drug discovery and development occurs.
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36
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Liu YH, Zhao YY, Jin F, Dong XZ, Zheng ML, Zhao ZS, Duan XM. λ/12 Super Resolution Achieved in Maskless Optical Projection Nanolithography for Efficient Cross-Scale Patterning. NANO LETTERS 2021; 21:3915-3921. [PMID: 33938760 DOI: 10.1021/acs.nanolett.1c00559] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The emerging demand for device miniaturization and integration prompts the patterning technique of micronano-cross-scale structures as an urgent desire. Lithography, as a sufficient patterning technique, has been playing an important role in achieving functional micronanoscale structures for decades. As a promising alternative, we have proposed and demonstrated the maskless optical projection nanolithography (MLOP-NL) technique for efficient cross-scale patterning. A minimum feature size of 32 nm, which is λ/12 super resolution breaking the optical diffraction limit, has been achieved by a single exposure. Furthermore, multiscale two-dimensional micronano-hybrid structures with the size over hundreds of micrometers and the precision at tens of nanometers have been fabricated by simply controlling the exposure conditions. The proposed MLOP-NL technique provides a powerful tool for achieving cross-scale patterning with both large-scale and precise configuration with high efficiency, which can be potentially used in the fabrication of multiscale integrated microsystems.
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Affiliation(s)
- Yu-Huan Liu
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29 Zhongguancun East Road, Beijing, 100190, P. R. China
- Beijing Institute of Remote Sensing Equipment, No.51 Yongding Road, Beijing 100854, P. R. China
| | - Yuan-Yuan Zhao
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, 855 East Xingye Avenue, Panyu District, Guangzhou, 511443, P. R. China
| | - Feng Jin
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29 Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Xian-Zi Dong
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29 Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Mei-Ling Zheng
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29 Zhongguancun East Road, Beijing, 100190, P. R. China
- School of Future Technologies, University of Chinese Academy of Sciences, Yanqihu Campus, Huaibei Town, Huaibei Zhang, Huairou District, Beijing, 101407, P. R. China
| | - Zhen-Sheng Zhao
- Laboratory of Organic NanoPhotonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29 Zhongguancun East Road, Beijing, 100190, P. R. China
| | - Xuan-Ming Duan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, 855 East Xingye Avenue, Panyu District, Guangzhou, 511443, P. R. China
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37
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Hejazian M, Balaur E, Abbey B. Recent Advances and Future Perspectives on Microfluidic Mix-and-Jet Sample Delivery Devices. MICROMACHINES 2021; 12:531. [PMID: 34067131 PMCID: PMC8151207 DOI: 10.3390/mi12050531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/04/2021] [Accepted: 05/04/2021] [Indexed: 11/28/2022]
Abstract
The integration of the Gas Dynamic Virtual Nozzle (GDVN) and microfluidic technologies has proven to be a promising sample delivery solution for biomolecular imaging studies and has the potential to be transformative for a range of applications in physics, biology, and chemistry. Here, we review the recent advances in the emerging field of microfluidic mix-and-jet sample delivery devices for the study of biomolecular reaction dynamics. First, we introduce the key parameters and dimensionless numbers involved in their design and characterisation. Then we critically review the techniques used to fabricate these integrated devices and discuss their advantages and disadvantages. We then summarise the most common experimental methods used for the characterisation of both the mixing and jetting components. Finally, we discuss future perspectives on the emerging field of microfluidic mix-and-jet sample delivery devices. In summary, this review aims to introduce this exciting new topic to the wider microfluidics community and to help guide future research in the field.
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Affiliation(s)
| | | | - Brian Abbey
- ARC Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe Institute for Molecular Sciences, La Trobe University, Melbourne, VIC 3086, Australia; (M.H.); (E.B.)
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38
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Houng P, Murakami Y, Shimoyama Y. Micro-mixing in flow-type process for supercritical CO2 extraction of ferulic acid and gallic acid from aqueous solution. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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An asymmetric flow-focusing droplet generator promotes rapid mixing of reagents. Sci Rep 2021; 11:8797. [PMID: 33888801 PMCID: PMC8062447 DOI: 10.1038/s41598-021-88174-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/22/2021] [Indexed: 12/11/2022] Open
Abstract
Nowadays droplet microfluidics is widely used to perform high throughput assays and for the synthesis of micro- and nanoparticles. These applications usually require packaging several reagents into droplets and their mixing to start a biochemical reaction. For rapid mixing microfluidic devices usually require additional functional elements that make their designs more complex. Here we perform a series of 2D numerical simulations, followed by experimental studies, and introduce a novel asymmetric flow-focusing droplet generator, which enhances mixing during droplet formation due to a 2D or 3D asymmetric vortex, located in the droplet formation area of the microfluidic device. Our results suggest that 2D numerical simulations can be used for qualitative analysis of two-phase flows and droplet generation process in quasi-two-dimensional devices, while the relative simplicity of such simulations allows them to be easily applied to fairly complicated microfluidic geometries. Mixing inside droplets formed in the asymmetric generator occurs up to six times faster than in a conventional symmetric one. The best mixing efficiency is achieved in a specific range of droplet volumes, which can be changed by scaling the geometry of the device. Thus, the droplet generator suggested here can significantly simplify designs of microfluidic devices because it enables both the droplet formation and fast mixing of the reagents within droplets. Moreover, it can be used to precisely estimate reaction kinetics.
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40
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Electroosmotic Mixing of Non-Newtonian Fluid in a Microchannel with Obstacles and Zeta Potential Heterogeneity. MICROMACHINES 2021; 12:mi12040431. [PMID: 33919798 PMCID: PMC8070777 DOI: 10.3390/mi12040431] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/09/2021] [Accepted: 04/13/2021] [Indexed: 12/15/2022]
Abstract
This paper investigates the electroosmotic micromixing of non-Newtonian fluid in a microchannel with wall-mounted obstacles and surface potential heterogeneity on the obstacle surface. In the numerical simulation, the full model consisting of the Navier–Stokes equations and the Poisson–Nernst–Plank equations are solved for the electroosmotic fluid field, ion transport, and electric field, and the power law model is used to characterize the rheological behavior of the aqueous solution. The mixing performance is investigated under different parameters, such as electric double layer thickness, flow behavior index, obstacle surface zeta potential, obstacle dimension. Due to the zeta potential heterogeneity at the obstacle surface, vortical flow is formed near the obstacle surface, which can significantly improve the mixing efficiency. The results show that, the mixing efficiency can be improved by increasing the obstacle surface zeta potential, the flow behavior index, the obstacle height, the EDL thickness.
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41
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Yamasaki K, Yamasaki T, Takahashi M, Suematsu H. A mixing microfluidic chip for real-time NMR monitoring of macromolecular reaction. J Biochem 2021; 170:363-368. [PMID: 33831188 DOI: 10.1093/jb/mvab048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/02/2021] [Indexed: 11/12/2022] Open
Abstract
NMR spectroscopy permits real-time monitoring of reactions that involve changes in the spectra of reactants. MICCS (MIcro Channeled Cell for Synthesis monitoring) is a microfluidic chip for such purposes, which is used to rapidly activate reactions by mixing the reactant solutions in the chip inserted into the typical NMR tube. Although it allows monitoring of chemical reactions of small compounds, its simple mixing system dependent on diffusion in the microchannel was not suitable for macromolecules such as proteins with low diffusion rates. Here we developed a new microfluidic chip based on MICCS by incorporating a mixer of split-and-recombination type within the microchannel. We applied it to monitoring of the protein-folding reaction in a stopped-flow mode. A solution of denaturant-unfolded RNase A was injected from a syringe pump into the microchip set inside the NMR magnet and mixed with a buffer for dilution to reach the folding condition. Immediately after dilution, the reaction was initiated and detected by a series of NMR measurements that were synchronized with activation and inactivation of the pump. The process was repeated for accumulation of the data. By analyzing the change of the spectra by factor analysis, a kinetic constant of 0.57 min-1 was obtained.
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Affiliation(s)
- Kazuhiko Yamasaki
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 3058566, Japan
| | - Tomoko Yamasaki
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 3058566, Japan
| | - Masaharu Takahashi
- Planning Headquarters, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 3058560, Japan
| | - Hiroto Suematsu
- JEOL RESONANCE Inc., 3-1-2 Musashino, Akishima, Tokyo, 1968558, Japan
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42
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Yang M, Gao Y, Liu Y, Yang G, Zhao CX, Wu KJ. Integration of microfluidic systems with external fields for multiphase process intensification. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116450] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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43
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Okuducu MB, Aral MM. Toward the Next Generation of Passive Micromixers: A Novel 3-D Design Approach. MICROMACHINES 2021; 12:mi12040372. [PMID: 33808487 PMCID: PMC8066093 DOI: 10.3390/mi12040372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/19/2021] [Accepted: 03/28/2021] [Indexed: 01/15/2023]
Abstract
Passive micromixers are miniaturized instruments that are used to mix fluids in microfluidic systems. In microchannels, combination of laminar flows and small diffusion constants of mixing liquids produce a difficult mixing environment. In particular, in very low Reynolds number flows, e.g., Re < 10, diffusive mixing cannot be promoted unless a large interfacial area is formed between the fluids to be mixed. Therefore, the mixing distance increases substantially due to a slow diffusion process that governs fluid mixing. In this article, a novel 3-D passive micromixer design is developed to improve fluid mixing over a short distance. Computational Fluid Dynamics (CFD) simulations are used to investigate the performance of the micromixer numerically. The circular-shaped fluid overlapping (CSFO) micromixer design proposed is examined in several fluid flow, diffusivity, and injection conditions. The outcomes show that the CSFO geometry develops a large interfacial area between the fluid bodies. Thus, fluid mixing is accelerated in vertical and/or horizontal directions depending on the injection type applied. For the smallest molecular diffusion constant tested, the CSFO micromixer design provides more than 90% mixing efficiency in a distance between 260 and 470 µm. The maximum pressure drop in the micromixer is found to be less than 1.4 kPa in the highest flow conditioned examined.
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Affiliation(s)
- Mahmut Burak Okuducu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Correspondence:
| | - Mustafa M. Aral
- Design and Simulation Technologies Inc., Istanbul 34860, Turkey;
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44
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Development of Rapid and High-Precision Colorimetric Device for Organophosphorus Pesticide Detection Based on Microfluidic Mixer Chip. MICROMACHINES 2021; 12:mi12030290. [PMID: 33803445 PMCID: PMC8000396 DOI: 10.3390/mi12030290] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/03/2021] [Accepted: 03/08/2021] [Indexed: 11/17/2022]
Abstract
The excessive pesticide residues in cereals, fruit and vegetables is a big threat to human health, and it is necessary to develop a portable, low-cost and high-precision pesticide residue detection scheme to replace the large-scale laboratory testing equipment for rapid detection of pesticide residues. In this study, a colorimetric device for rapid detection of organophosphorus pesticide residues with high precision based on a microfluidic mixer chip was proposed. The microchannel structure with high mixing efficiency was determined by fluid dynamics simulation, while the corresponding microfluidic mixer chip was designed. The microfluidic mixer chip was prepared by a self-developed liquid crystal display (LCD) mask photo-curing machine. The influence of printing parameters on the accuracy of the prepared chip was investigated. The light source with the optimal wavelength of the device was determined by absorption spectrum measurement, and the relationship between the liquid reservoir depth and detection limit was studied by experiments. The correspondence between pesticide concentration and induced voltage was derived. The minimum detection concentration of the device could reach 0.045 mg·L-1 and the average detection time was reduced to 60 s. The results provide a theoretical and experimental basis for portable and high-precision detection of pesticide residues.
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45
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Design and evaluation of a 3D multi-manifold micromixer realized by a double-Archimedes-screw for rapid mixing within a short distance. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Kawai T, Mihara Y, Morita M, Ohkubo M, Asami T, Watanabe TM. Quantitation of Cell Membrane Permeability of Cyclic Peptides by Single-Cell Cytoplasm Mass Spectrometry. Anal Chem 2021; 93:3370-3377. [PMID: 33550808 DOI: 10.1021/acs.analchem.0c03901] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cyclic peptides (CPs) have attracted attention as next-generation drugs because they possess both cell-permeable potential as small molecules and specific affinity similar to antibodies. As intracellular molecules are important targets of CPs, quantitation of the intracellular retention and transmembrane permeability of CPs is necessary for drug development. However, permeated CPs within cells cannot be directly assessed by conventional permeability assays using methods such as artificial membranes and cell monolayers. Here, we propose a new approach using single-cell cytoplasm mass spectrometry (SCC-MS). After cells were incubated with CPs, the cytoplasm was directly collected from a single cell using a microneedle followed by nanoelectrospray ionization mass spectrometry detection of the CPs. The height of the CP peak was plotted against time and fitted with a simple function, y = a(1 - e-bx), to calculate the apparent permeability coefficient (Papp) for both the influx and efflux directions. MCF-7 cells were selected as model cancer cells and cultured with cyclosporin A (CsA) and its demethylated analogs (dmCsA-1, -2, and -3) as model CPs. Papp values (10-6 cm/s) obtained from cells incubated with 50 μM CPs ranged from 0.017 to 0.121 for influx and 0.20 to 1.48 for efflux. The higher efflux ratio was possibly caused by efflux transporters such as P-glycoprotein, a well-known receptor of CsA. The equilibrated intracellular concentration of CPs was estimated to be as low as 4.1-6.8 μM, which showed good consistency with the high efflux ratio. SCC-MS is promising as a reliable permeability assay for next-generation CP-based pharmaceuticals.
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Affiliation(s)
- Takayuki Kawai
- RIKEN Center for Biosystems Dynamics Research, Suita, Osaka 565-0874, Japan.,Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasuhiro Mihara
- Research Headquarters, Taisho Pharmaceutical Co., LTD., Saitama-shi, Saitama 331-9530, Japan
| | - Makiko Morita
- RIKEN Center for Biosystems Dynamics Research, Suita, Osaka 565-0874, Japan
| | - Masahiko Ohkubo
- Research Headquarters, Taisho Pharmaceutical Co., LTD., Saitama-shi, Saitama 331-9530, Japan
| | - Taiji Asami
- Research Headquarters, Taisho Pharmaceutical Co., LTD., Saitama-shi, Saitama 331-9530, Japan
| | - Tomonobu M Watanabe
- RIKEN Center for Biosystems Dynamics Research, Suita, Osaka 565-0874, Japan.,Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima City, Hiroshima 734-8553, Japan
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Zhang H, Bai Y, Zhu N, Xu J. Microfluidic reactor with immobilized enzyme-from construction to applications: A review. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Boutiette AL, Toothaker C, Corless B, Boukaftane C, Howell C. 3D printing direct to industrial roll-to-roll casting for fast prototyping of scalable microfluidic systems. PLoS One 2020; 15:e0244324. [PMID: 33370381 PMCID: PMC7769481 DOI: 10.1371/journal.pone.0244324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 12/07/2020] [Indexed: 11/19/2022] Open
Abstract
Microfluidic technologies have enormous potential to offer breakthrough solutions across a wide range of applications. However, the rate of scale-up and commercialization of these technologies has lagged significantly behind promising breakthrough developments in the lab, due at least in part to the problems presented by transitioning from benchtop fabrication methods to mass-manufacturing. In this work, we develop and validate a method to create functional microfluidic prototype devices using 3D printed masters in an industrial-scale roll-to-roll continuous casting process. There were no significant difference in mixing performance between the roll-to-roll cast devices and the PDMS controls in fluidic mixing tests. Furthermore, the casting process provided information on the suitability of the prototype microfluidic patterns for scale-up. This work represents an important step in the realization of high-volume prototyping and manufacturing of microfluidic patterns for use across a broad range of applications.
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Affiliation(s)
- Amber L. Boutiette
- Department of Chemical and Biomedical Engineering, University of Maine, Orono, Maine, United States of America
| | - Cristoffer Toothaker
- Department of Chemical and Biomedical Engineering, University of Maine, Orono, Maine, United States of America
| | - Bailey Corless
- Department of Chemical and Biomedical Engineering, University of Maine, Orono, Maine, United States of America
| | | | - Caitlin Howell
- Department of Chemical and Biomedical Engineering, University of Maine, Orono, Maine, United States of America
- Graduate School of Biomedical Science and Engineering, University of Maine, Orono, Maine, United States of America
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Strassburg S, Mayer K, Scheibel T. Functionalization of biopolymer fibers with magnetic nanoparticles. PHYSICAL SCIENCES REVIEWS 2020. [DOI: 10.1515/psr-2019-0118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
Hybrid fibers consisting of biopolymers and inorganic nanoparticles are receiving increasing attention due to their unique properties. Commonly, the nanoparticles are chosen for their intrinsic properties such as magnetic, thermal, or electrical conductivity. The biopolymer component of the hybrid fiber is chosen for its mechanical properties and ability to act as a scaffold or matrix for the nanoparticles. While there are many fiber-forming synthetic polymers, there has been a recent interest in replacing these systems with biopolymers due to their sustainability, biocompatibility, nontoxicity, and biodegradability. Fibers made from biopolymers have one additional benefit over synthetic polymers as they make good scaffolds for embedding nanoparticles without the need of any additional bonding agents. In particular, naturally occurring biopolymers such as proteins exhibit a myriad of interactions with nanoparticles, including ionic, H-bonding, covalent, Van der Waals, and electrostatic interactions. The diverse range of interactions between magnetic nanoparticles and biopolymers makes resulting hybrid fibers of particular interest as magnetic-responsive materials. Magnetically responsive hybrid biopolymer fibers have many features, including enhanced thermal stabilities, strong mechanical toughness, and perhaps most interestingly multifunctionality, allowing for a wide range of applications. These applications range from biosensing, filtration, UV shielding, antimicrobial, and medical applications, to name a few. Here, we review established hybrid fibers consisting of biopolymers and nanoparticles with a primary focus on biopolymers doped with magnetic nanoparticles and their various putative applications.
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Affiliation(s)
- Stephen Strassburg
- Department of Biomaterials , Universität Bayreuth , Prof.–Rüdiger-Bormann-Straße 1 , 95447 Bayreuth , Germany
| | - Kai Mayer
- Department of Biomaterials , Universität Bayreuth , Prof.–Rüdiger-Bormann-Straße 1 , 95447 Bayreuth , Germany
| | - Thomas Scheibel
- Department of Biomaterials , Universität Bayreuth , Prof.–Rüdiger-Bormann-Straße 1 , 95447 Bayreuth , Germany
- Bayreuth Center for Colloids and Interfaces (BZKG) , Universität Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
- Bayreuth Center for Molecular Biosciences (BZMB) , Universität Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
- Bayreuth Center for Material Science (BayMAT) , Universität Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
- Bavarian Polymer Institute (BPI) , Universität Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
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