1
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Chavez‐Pineda OG, Rodriguez‐Moncayo R, Cedillo‐Alcantar DF, Guevara‐Pantoja PE, Amador‐Hernandez JU, Garcia‐Cordero JL. Microfluidic systems for the analysis of blood‐derived molecular biomarkers. Electrophoresis 2022; 43:1667-1700. [DOI: 10.1002/elps.202200067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 06/18/2022] [Accepted: 06/22/2022] [Indexed: 12/19/2022]
Affiliation(s)
- Oriana G. Chavez‐Pineda
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
| | - Roberto Rodriguez‐Moncayo
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
| | - Diana F. Cedillo‐Alcantar
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
| | - Pablo E. Guevara‐Pantoja
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
| | - Josue U. Amador‐Hernandez
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
| | - Jose L. Garcia‐Cordero
- Laboratory of Microtechnologies Applied to Biomedicine (LMAB) Centro de Investigación y de Estudios Avanzados (Cinvestav) Monterrey Nuevo León Mexico
- Roche Institute for Translational Bioengineering (ITB) Roche Pharma Research and Early Development, Roche Innovation Center Basel Basel Switzerland
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2
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Yin M, Alexander Kim Z, Xu B. Micro/Nanofluidic‐Enabled Biomedical Devices: Integration of Structural Design and Manufacturing. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202100117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Mengtian Yin
- Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904 USA
| | - Zachary Alexander Kim
- Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904 USA
| | - Baoxing Xu
- Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904 USA
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3
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Sathish S, Shen AQ. Toward the Development of Rapid, Specific, and Sensitive Microfluidic Sensors: A Comprehensive Device Blueprint. JACS AU 2021; 1:1815-1833. [PMID: 34841402 PMCID: PMC8611667 DOI: 10.1021/jacsau.1c00318] [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: 07/20/2021] [Indexed: 05/04/2023]
Abstract
Recent advances in nano/microfluidics have led to the miniaturization of surface-based chemical and biochemical sensors, with applications ranging from environmental monitoring to disease diagnostics. These systems rely on the detection of analytes flowing in a liquid sample, by exploiting their innate nature to react with specific receptors immobilized on the microchannel walls. The efficiency of these systems is defined by the cumulative effect of analyte detection speed, sensitivity, and specificity. In this perspective, we provide a fresh outlook on the use of important parameters obtained from well-characterized analytical models, by connecting the mass transport and reaction limits with the experimentally attainable limits of analyte detection efficiency. Specifically, we breakdown when and how the operational (e.g., flow rates, channel geometries, mode of detection, etc.) and molecular (e.g., receptor affinity and functionality) variables can be tailored to enhance the analyte detection time, analytical specificity, and sensitivity of the system (i.e., limit of detection). Finally, we present a simple yet cohesive blueprint for the development of high-efficiency surface-based microfluidic sensors for rapid, sensitive, and specific detection of chemical and biochemical analytes, pertinent to a variety of applications.
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Affiliation(s)
- Shivani Sathish
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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4
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Pomili T, Donati P, Pompa PP. Paper-Based Multiplexed Colorimetric Device for the Simultaneous Detection of Salivary Biomarkers. BIOSENSORS 2021; 11:bios11110443. [PMID: 34821659 PMCID: PMC8615519 DOI: 10.3390/bios11110443] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 10/28/2021] [Accepted: 11/05/2021] [Indexed: 05/08/2023]
Abstract
In this study, we describe a monolithic and fully integrated paper-based device for the simultaneous detection of three prognostic biomarkers in saliva. The pattern of the proposed multiplexed device is designed with a central sample deposition zone and three identical arms, each containing a pre-treatment and test zone. Its one-step fabrication is realized by CO2 laser cutting, providing remarkable parallelization and rapidity (ca. 5 s/device). The colorimetric detection is based on the sensitive and selective target-induced reshaping of plasmonic multibranched gold nanoparticles, which exhibit a clear spectral shift (and blue-to-pink color change) in case of non-physiological concentrations of the three salivary biomarkers. A rapid and multiplexed naked-eye or smartphone-based readout of the colorimetric response is achieved within 10 min. A prototype kit for POCT testing is also reported, providing robustness and easy handling of the device.
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Affiliation(s)
- Tania Pomili
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy; (T.P.); (P.D.)
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Paolo Donati
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy; (T.P.); (P.D.)
| | - Pier Paolo Pompa
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy; (T.P.); (P.D.)
- Correspondence:
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5
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Jang I, Kang H, Song S, Dandy DS, Geiss BJ, Henry CS. Flow control in a laminate capillary-driven microfluidic device. Analyst 2021; 146:1932-1939. [PMID: 33492316 PMCID: PMC7990706 DOI: 10.1039/d0an02279a] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Capillary-driven microfluidic devices are of significant interest for on-site analysis because they do not require external pumps and can be made from inexpensive materials. Among capillary-driven devices, those made from paper and polyester film are among the most common and have been used in a wide array of applications. However, since capillary forces are the only driving force, flow is difficult to control, and passive flow control methods such as changing the geometry must be used to accomplish various analytical applications. This study presents several new flow control methods that can be utilized in a laminate capillary-driven microfluidic device to increase available functionality. First, we introduce push and burst valve systems that can stop and start flow. These valves can stop flow for >30 min and be opened by either pressing the channel or inflowing other fluids to the valve region. Next, we propose flow control methods for Y-shaped channels that enable more functions. In one example, we demonstrate the ability to accurately control concentration to create laminar, gradient, and fully mixed flows. In a second example, flow velocity in the main channel is controlled by adjusting the length of the inlet channel. In addition, the flow velocity is constant as the inlet length increases. Finally, the flow velocity in the Y-shaped device as a function of channel height and fluid properties such as viscosity and surface tension was examined. As in previous studies on capillary-driven channels, the flow rate was affected by each parameter. The fluidic control tools presented here will enable new designs and functions for low cost point of need assays across a variety of fields.
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Affiliation(s)
- Ilhoon Jang
- Institute of Nano Science and Technology, Hanyang University, Seoul, Korea, 04763
- Department of Chemistry, Colorado State University, CO, USA, 80523
| | - Hyunwoong Kang
- Department of Mechanical Engineering, Hanyang University, Seoul, Korea, 04763
| | - Simon Song
- Institute of Nano Science and Technology, Hanyang University, Seoul, Korea, 04763
- Department of Mechanical Engineering, Hanyang University, Seoul, Korea, 04763
| | - David S. Dandy
- Department of Chemical and Biological Engineering, Colorado State University, CO, USA, 80523
| | - Brian J. Geiss
- Department of Microbiology, Immunology and Pathology, Colorado State University, CO, USA, 80523
| | - Charles S. Henry
- Department of Chemistry, Colorado State University, CO, USA, 80523
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6
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Chen X, Chen S, Zhang Y, Yang H. Study on Functionality and Surface Modification of a Stair-Step Liquid-Triggered Valve for On-Chip Flow Control. MICROMACHINES 2020; 11:mi11070690. [PMID: 32708757 PMCID: PMC7407824 DOI: 10.3390/mi11070690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/31/2022]
Abstract
Distinctive from other forms of microfluidic system, capillary microfluidics is of great interest in autonomous micro-systems due to its well-engineered fluidic control based on capillary force. As an essential component of fluidic control in capillaric circuits, micro-valves enable sequential fluidic operations by performing actions such as stopping and triggering. In this paper, we present a stair-step liquid-triggered valve; the functionality of the valve and its dependencies on geometry and surface modification are studied. The surface contact angle of the microfabricated valves that are coated by polyethylene glycol (PEG) or (3-Aminopropyl) triethoxysilane (APTES) is evaluated experimentally, and the corresponding reliability of the valve structure is discussed. Moreover, the variation in the surface contact angle over time is investigated, indicating the shelf time of the device. We further discuss the overall fluidic behavior in such capillary valves, which benefits the capillaric circuit designs at the initial stage.
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Affiliation(s)
- Xi Chen
- Laboratory of Biomedical Microsystems and Nano Devices, Bionic Sensing and Intelligence Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518055, China; (X.C.); (S.C.)
| | - Sihui Chen
- Laboratory of Biomedical Microsystems and Nano Devices, Bionic Sensing and Intelligence Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518055, China; (X.C.); (S.C.)
| | - Yi Zhang
- Center for Medical AI, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- CAS Key Laboratory of Health Informatics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Correspondence: (H.Y.); (Y.Z.); Tel.: +86-755-8639-2675 (H.Y.)
| | - Hui Yang
- Laboratory of Biomedical Microsystems and Nano Devices, Bionic Sensing and Intelligence Center, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen 518055, China; (X.C.); (S.C.)
- CAS Key Laboratory of Health Informatics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Correspondence: (H.Y.); (Y.Z.); Tel.: +86-755-8639-2675 (H.Y.)
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7
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Narayanamurthy V, Jeroish ZE, Bhuvaneshwari KS, Bayat P, Premkumar R, Samsuri F, Yusoff MM. Advances in passively driven microfluidics and lab-on-chip devices: a comprehensive literature review and patent analysis. RSC Adv 2020; 10:11652-11680. [PMID: 35496619 PMCID: PMC9050787 DOI: 10.1039/d0ra00263a] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 02/20/2020] [Indexed: 12/15/2022] Open
Abstract
The development of passively driven microfluidic labs on chips has been increasing over the years. In the passive approach, the microfluids are usually driven and operated without any external actuators, fields, or power sources. Passive microfluidic techniques adopt osmosis, capillary action, surface tension, pressure, gravity-driven flow, hydrostatic flow, and vacuums to achieve fluid flow. There is a great need to explore labs on chips that are rapid, compact, portable, and easy to use. The evolution of these techniques is essential to meet current needs. Researchers have highlighted the vast potential in the field that needs to be explored to develop rapid passive labs on chips to suit market/researcher demands. A comprehensive review, along with patent analysis, is presented here, listing the latest advances in passive microfluidic techniques, along with the related mechanisms and applications. Different approaches employed in the passively driven microfluidics and LOC devices.![]()
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Affiliation(s)
- Vigneswaran Narayanamurthy
- Department of Electronics and Computer Engineering Technology
- Faculty of Electrical and Electronic Engineering Technology
- Universiti Teknikal Malaysia Melaka
- 76100 Durian Tunggal
- Malaysia
| | - Z. E. Jeroish
- Department of Biomedical Engineering
- Rajalakshmi Engineering College
- Chennai 602105
- India
- Faculty of Electrical and Electronics Engineering
| | - K. S. Bhuvaneshwari
- Department of Biomedical Engineering
- Rajalakshmi Engineering College
- Chennai 602105
- India
- Faculty of Electronics and Computer Engineering
| | - Pouriya Bayat
- Department of Bioengineering
- McGill University
- Montreal
- Canada H3A 0E9
| | - R. Premkumar
- Department of Biomedical Engineering
- Rajalakshmi Engineering College
- Chennai 602105
- India
| | - Fahmi Samsuri
- Faculty of Electrical and Electronics Engineering
- University Malaysia Pahang
- Pekan 26600
- Malaysia
| | - Mashitah M. Yusoff
- Faculty of Industrial Sciences and Technology
- University Malaysia Pahang
- Kuantan 26300
- Malaysia
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8
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Meyer S, Clarke C, dos Santos RO, Bishop D, Krieger MA, Blanes L. Developing self-generated calibration curves using a capillary-driven wax-polyester lab on a chip device and thermal gates. Microchem J 2019. [DOI: 10.1016/j.microc.2019.01.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Tang H, Cai D, Ren T, Xiong P, Liu Y, Gu H, Shi G. Fabrication of a low background signal glucose biosensor with 3D network materials as the electrocatalyst. Anal Biochem 2019; 567:63-71. [DOI: 10.1016/j.ab.2018.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 12/10/2018] [Accepted: 12/13/2018] [Indexed: 10/27/2022]
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10
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Zong L, Han Y, Gao L, Du C, Zhang X, Li L, Huang X, Liu J, Yu HD, Huang W. A transparent paper-based platform for multiplexed bioassays by wavelength-dependent absorbance/transmittance. Analyst 2019; 144:7157-7161. [DOI: 10.1039/c9an01647c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work describes the rational design of a paper-based biosensing platform for multi-target detection with low cost and high sensitivity by wavelength-dependent absorbance/transmittance.
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11
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Fujisaki S, Shibata H, Yamada K, Suzuki K, Citterio D. Printed low-cost microfluidic analytical devices based on a transparent substrate. Analyst 2019; 144:2746-2754. [PMID: 30869086 DOI: 10.1039/c8an02304b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This work describes the development of a microfluidic analytical device prepared on a transparent OHP film substrate, named the microfluidic transparent film-based analytical device (μTFAD). Printing technologies including wax printing for microchannel patterning and inkjet printing for chemical assay component deposition have been employed for the μTFAD fabrication. The fully printed μTFAD allowed gravity-assisted pump-free transportation of the sample liquid (50 μL) and an absorbance measurement-based iron ion (Fe2+) assay using nitroso-PSAP as the colorimetric reagent within a wax-patterned microfluidic structure. By measuring absorbance values at the Fe2+-nitroso-PSAP complex-specific wavelength (756 nm), a response curve with a linear range of 0-200 μM was obtained. The limit of detection (1.18 μM) obtained with the proposed μTFADs was comparable to the results achieved with a conventional 96-well microplate assay (0.92 μM) and lower than that in the case of digital colour analysis-assisted filter paper spot tests (7.71 μM) or the absorbance analysis of refractive index-matched translucent filter paper spots (37.2 μM). In addition, highly selective Fe2+ detection has been achieved in the presence of potentially interfering metal ions (Cu2+, Co2+, Ni2+) without the use of any masking reagents, owing to the selection of the target complex-specific wavelength in the absorbance measurement on μTFADs.
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Affiliation(s)
- Shogo Fujisaki
- Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
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12
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Xie Y, You H, Gao Z, Huang Z, Yang M. An Effective Capillary Valve Based on Micro-hole Array for Microfluidic Systems. ANAL SCI 2018; 34:1323-1327. [PMID: 30101831 DOI: 10.2116/analsci.18p257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
With the development of microfluidic systems for portable devices where the capillary force as the driving force drove the liquid in a microchannel. An effective capillary microvalve based on a micro-hole array is proposed in this paper for the purpose of good performance, and programmable control, and easy-to-fabricate. The Wenzel model was used to slow down the velocity of fluid flow. The microvalve was made by a hot-embossing and hot-bonding process. The valve function was assessed by liquid flowing experiments. The results showed that the valve employs an abruptly changing contact angle to slow down the fluid flow. The controlling time is approximately 177 - 213 s. The best control effect was obtained when the contact angle equaled to 90°. The effect of the roughness of the microvalve was also evaluated. Therefore, this work has a great potential and broad prospect for both research and applications in microfluidic systems, such as the portable devices in the medical testing field.
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Affiliation(s)
- Yang Xie
- Institute of Intelligent Machines, Chinese Academy of Sciences.,Department of Precision Machinery and Precision Instrument, University of Science and Technology of China
| | - Hui You
- Institute of Intelligent Machines, Chinese Academy of Sciences.,Department of Precision Machinery and Precision Instrument, University of Science and Technology of China
| | | | - Zhe Huang
- Institute of Intelligent Machines, Chinese Academy of Sciences.,Department of Precision Machinery and Precision Instrument, University of Science and Technology of China
| | - Mingpeng Yang
- Institute of Intelligent Machines, Chinese Academy of Sciences.,Department of Precision Machinery and Precision Instrument, University of Science and Technology of China
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13
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Seder I, Kim DM, Hwang SH, Sung H, Kim DE, Kim SJ. Microfluidic chip with movable layers for the manipulation of biochemicals. LAB ON A CHIP 2018; 18:1867-1874. [PMID: 29877550 DOI: 10.1039/c8lc00382c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A simple and effective platform that can conglomerate various microfluidic functions in a single chip is essential for many bioassays, especially for point-of-care testing applications. Here, a chip that exploits surface tension in solutions with movable top and bottom layers is presented, for use in fluid transport, mixing, maintaining metered volumes, and biomolecule capture and release. The chip has open chambers in vertically mobile top layers and rotationally mobile bottom layers to exploit surface tension in biochemical solutions, and implements control over fluid motion. To manipulate biomolecules, a vertically mobile tip with a permanent magnet at the top layer performs collection, transport, release, and dispersion of magnetic beads. Thus, the chip orchestrates various fluidic control functions without using on-chip valves and pumps that increase operational and structural complexity. To demonstrate its utility, the chip performs automated DNA extraction by obtaining genomic DNA from a sample containing cells. Our approach provides a useful and effective alternative to numerous platforms that use active and passive on-chip components for bioassays.
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Affiliation(s)
- Islam Seder
- Department of Mechanical Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
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14
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Wu W. A pressure-driven gas-diffusion/permeation micropump for self-activated sample transport in an extreme micro-environment. Analyst 2018; 143:4819-4835. [DOI: 10.1039/c8an01120f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The pressure-driven gas-diffusion/permeation micropump is highlighted for stable microdroplet/liquid delivery under extreme conditions,e.g.high temperature, and a three-dimensional, long-distance and complex-topology microchannel.
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Affiliation(s)
- Wenming Wu
- State Key Laboratory of Applied Optics
- Changchun Institute of Optics
- Fine Mechanics and Physics
- Chinese Academy of Sciences
- Changchun
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15
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Karnik S, Lee C, Cancino A, Bhushan A. Real-time measurement of cholesterol secreted by human hepatocytes using a novel microfluidic assay. TECHNOLOGY 2018; 6:135-141. [PMID: 31548979 PMCID: PMC6756770 DOI: 10.1142/s2339547818500097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The use of microfluidics has become widespread in recent years because of the use of lesser resources such as small size, low volume of reagents, and physiological representation of mammalian cells. One of the advantages of microfluidic-based cell culture is the ability to perfuse culture media which tends to improve cellular health and function. Although measurement of cellular function conventionally is carried out using well-plates and plate readers, these approaches are insufficient to carry out in-line analysis of perfused cell cultures because of mismatch between volumes and sensitivity. We report the development of a novel microfluidic device and assay that is carried out under perfusion, in-line to measure the cholesterol secreted from a human hepatocyte tissue-chip. The heart of the assay is the unique implementation of enzymatic chemistry that is carried out on a polystyrene bead. Using this approach, we successfully measured cholesterol secreted by the perfused human hepatocytes.
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Affiliation(s)
- Sonali Karnik
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago
| | - Chaeeun Lee
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago
| | - Andrea Cancino
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago
| | - Abhinav Bhushan
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago
- Corresponding Author: Abhinav Bhushan, Assistant Professor, Department of Biomedical Engineering, Illinois Institute of Technology, Chicago,
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16
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Urbaczek AC, Leão PAGC, Souza FZRD, Afonso A, Vieira Alberice J, Cappelini LTD, Carlos IZ, Carrilho E. Endothelial Cell Culture Under Perfusion On A Polyester-Toner Microfluidic Device. Sci Rep 2017; 7:10466. [PMID: 28874818 PMCID: PMC5585355 DOI: 10.1038/s41598-017-11043-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 08/18/2017] [Indexed: 01/09/2023] Open
Abstract
This study presents an inexpensive and easy way to produce a microfluidic device that mimics a blood vessel, serving as a start point for cell culture under perfusion, cardiovascular research, and toxicological studies. Endpoint assays (i.e., MTT reduction and NO assays) were used and revealed that the components making up the microchip, which is made of polyester and toner (PT), did not induce cell death or nitric oxide (NO) production. Applying oxygen plasma and fibronectin improved the adhesion and proliferation endothelial cell along the microchannel. As expected, these treatments showed an increase in vascular endothelial growth factor (VEGF-A) concentration profiles, which is correlated with adherence and cell proliferation, thus promoting endothelialization of the device for neovascularization. Regardless the simplicity of the device, our “vein-on-a-chip” mimetic has a potential to serve as a powerful tool for those that demand a rapid microfabrication method in cell biology or organ-on-a-chip research.
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Affiliation(s)
- Ana Carolina Urbaczek
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,Instituto Nacional de Ciência e Tecnologia de Bioanalítica, INCTBio, Campinas, SP, Brazil
| | - Paulo Augusto Gomes Carneiro Leão
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,Instituto Nacional de Ciência e Tecnologia de Bioanalítica, INCTBio, Campinas, SP, Brazil
| | - Fayene Zeferino Ribeiro de Souza
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,Instituto Nacional de Ciência e Tecnologia de Bioanalítica, INCTBio, Campinas, SP, Brazil
| | - Ana Afonso
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,GHTM - Global Health and Tropical Medicine, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL, Lisboa, Portugal.,Laboratório de Parasitologia, Departamento de Morfologia e Patologia, Universidade Federal de São Carlos, UFSCar, São Carlos, SP, Brazil
| | - Juliana Vieira Alberice
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,Instituto Nacional de Ciência e Tecnologia de Bioanalítica, INCTBio, Campinas, SP, Brazil
| | - Luciana Teresa Dias Cappelini
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil.,Escola Paulista de Medicina, Universidade Federal de São Paulo, Unifesp, São Paulo, SP, Brazil
| | - Iracilda Zeppone Carlos
- Faculdade de Ciências Farmacêuticas, FCFar, Universidade Estadual Paulista, UNESP, Araraquara, SP, Brazil
| | - Emanuel Carrilho
- Instituto de Química de São Carlos, IQSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil. .,Instituto Nacional de Ciência e Tecnologia de Bioanalítica, INCTBio, Campinas, SP, Brazil.
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17
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Liu S, Su W, Ding X. A Review on Microfluidic Paper-Based Analytical Devices for Glucose Detection. SENSORS 2016; 16:s16122086. [PMID: 27941634 PMCID: PMC5191067 DOI: 10.3390/s16122086] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/31/2016] [Accepted: 11/02/2016] [Indexed: 12/26/2022]
Abstract
Glucose, as an essential substance directly involved in metabolic processes, is closely related to the occurrence of various diseases such as glucose metabolism disorders and islet cell carcinoma. Therefore, it is crucial to develop sensitive, accurate, rapid, and cost effective methods for frequent and convenient detections of glucose. Microfluidic Paper-based Analytical Devices (μPADs) not only satisfying the above requirements but also occupying the advantages of portability and minimal sample consumption, have exhibited great potential in the field of glucose detection. This article reviews and summarizes the most recent improvements in glucose detection in two aspects of colorimetric and electrochemical μPADs. The progressive techniques for fabricating channels on μPADs are also emphasized in this article. With the growth of diabetes and other glucose indication diseases in the underdeveloped and developing countries, low-cost and reliably commercial μPADs for glucose detection will be in unprecedentedly demand.
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Affiliation(s)
- Shuopeng Liu
- Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Wenqiong Su
- Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Xianting Ding
- Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
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Resolving Anomalies in Predicting Electrokinetic Energy Conversion Efficiencies of Nanofluidic Devices. Sci Rep 2015; 5:14725. [PMID: 26437925 PMCID: PMC4593964 DOI: 10.1038/srep14725] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 09/04/2015] [Indexed: 12/04/2022] Open
Abstract
We devise a new approach for capturing complex interfacial interactions over reduced length scales, towards predicting electrokinetic energy conversion efficiencies of nanofluidic devices. By embedding several aspects of intermolecular interactions in continuum based formalism, we show that our simple theory becomes capable of representing complex interconnections between electro-mechanics and hydrodynamics over reduced length scales. The predictions from our model are supported by reported experimental data, and are in excellent quantitative agreement with molecular dynamics simulations. The present model, thus, may be employed to rationalize the discrepancies between low energy conversion efficiencies of nanofluidic channels that have been realized from experiments, and the impractically high energy conversion efficiencies that have been routinely predicted by the existing theories.
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Microfluidic toner-based analytical devices: disposable, lightweight, and portable platforms for point-of-care diagnostics with colorimetric detection. Methods Mol Biol 2015; 1256:85-98. [PMID: 25626533 DOI: 10.1007/978-1-4939-2172-0_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
This chapter describes the development of microfluidic toner-based analytical devices (μTADs) to perform clinical diagnostics using a scanner or cell-phone camera. μTADs have been produced in a platform composed of polyester and toner by the direct-printing technology (DPT) in a matter of minutes. This technology offers simplicity and versatility, and it does not require any sophisticated instrumentation. Toner-based devices integrate the current generation of disposable analytical devices along paper-based chips. The cost of one μTAD has been estimated to be lower than $0.10. In addition, these platforms are lightweight and portable thus enabling their use for point-of-care applications. In the last 5 years, great efforts have been dedicated to spread out the use of μTADs in bioassays. The current chapter reports the fabrication of printed microplates and integrated microfluidic toner-based devices for dengue diagnostics and rapid colorimetric assays with clinically relevant analytes including cholesterol, triglycerides, total proteins, and glucose. The use of μTADs associated with cell-phone camera may contribute to the health care, in special, to people housed in developing regions or with limited access to clinics and hospitals.
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Mross S, Pierrat S, Zimmermann T, Kraft M. Microfluidic enzymatic biosensing systems: A review. Biosens Bioelectron 2015; 70:376-91. [DOI: 10.1016/j.bios.2015.03.049] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/19/2015] [Accepted: 03/21/2015] [Indexed: 12/17/2022]
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21
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Wu Y, Boonloed A, Sleszynski N, Koesdjojo M, Armstrong C, Bracha S, Remcho VT. Clinical chemistry measurements with commercially available test slides on a smartphone platform: Colorimetric determination of glucose and urea. Clin Chim Acta 2015; 448:133-8. [PMID: 26102280 DOI: 10.1016/j.cca.2015.05.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 05/07/2015] [Accepted: 05/12/2015] [Indexed: 01/29/2023]
Abstract
BACKGKROUND Rapidly increasing healthcare costs in economically advantaged countries are currently unsustainable, while in many developing nations, even 50-year-old technologies are too expensive to implement. New and unconventional technologies are being explored as solutions to this problem. In this study, we examined the use of a smartphone as the detection platform for 2 well-developed, relatively inexpensive, commercially available clinical chemistry assays as a model for rapid and inexpensive clinical diagnostic testing. METHODS An Apple iPhone 4 camera phone equipped with a color analysis application (ColorAssist) was combined with Vitros® glucose and urea colorimetric assays. Color images of assay slides at various concentrations of glucose or urea were collected with the iPhone 4 and quantitated in three different spectral ranges (red/green/blue or RGB) using the ColorAssist app. When the diffuse reflectance data was converted into absorbance, it was possible to quantitate glucose or blood urea nitrogen (BUN) over their clinically important concentration ranges (30-515mg/dl for glucose or 2-190mg/dl for BUN), with good linearity (R(2)=0.9994 or 0.9996, respectively [n=5]). RESULTS Data collected using the iPhone 4 and canine serum samples were in agreement with results from the instrumental "gold standard" (Beckman Coulter AU480 Chemistry System) (R(2)=0.9966 and slope=1.0001 for glucose; R(2)=0.9958 and slope=0.9454 for BUN). Glucose determinations of serum samples made using this smartphone method were as accurate as or more accurate than a commercial colorimetric dry slide analyzer (Heska® Element DC Chemistry Analyzer, Loveland, CO) and 2 glucometers: ReliOn® Ultima (Abbott Diabetes Care Inc) and Presto® (AgaMatrix Inc.H). BUN determinations made using the smartphone approach were comparable in accuracy to the Heska instrument. CONCLUSION This demonstration shows that smartphones have the potential to be used as simple, effective colorimetric detectors for quantitative diagnostic tests, and may be applicable for both point-of-care applications in the developed world and field deployment in developing nations.
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Affiliation(s)
- Yuanyuan Wu
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA
| | - Anukul Boonloed
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA
| | - Neal Sleszynski
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA
| | - Myra Koesdjojo
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA
| | - Chadd Armstrong
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA
| | - Shay Bracha
- Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, USA
| | - Vincent T Remcho
- Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA.
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Online electrochemical method for continuous and simultaneous monitoring of glucose and l-lactate in vivo with graphene hybrids as the electrocatalyst. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Ferrer IM, Valadez H, Estala L, Gomez FA. Paper microfluidic-based enzyme catalyzed double microreactor. Electrophoresis 2014; 35:2417-9. [PMID: 24913741 DOI: 10.1002/elps.201400091] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/20/2014] [Accepted: 05/20/2014] [Indexed: 11/06/2022]
Abstract
We describe a paper microfluidic-based enzyme catalyzed double microreactor assay using fluorescent detection. Here, solutions of lactate dehydrogenase (LDH) and diaphorase (DI) were directly spotted onto the microfluidic paper-based analytical device (μPAD). Samples containing lactic acid, resazurin, and nicotinamide adenine dinucleotide oxidized form (NAD(+) ), potassium chloride (KCl), and BSA, in MES buffer were separately spotted onto the μPAD and MES buffer flowed through the device. A cascade reaction occurs upon the sample spot overlapping with LDH to form pyruvate and nicotinamide adenine dinucleotide reduced form (NADH). Subsequently, NADH is used in the conversion of resazurin to fluorescent resorufin by DI. The μPAD avoids the need of surface functionalization or enzyme immobilization steps. These microreactor devices are low cost and easy to fabricate and effect reaction based solely on buffer capillary action.
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Affiliation(s)
- Ivonne M Ferrer
- Department of Chemistry and Biochemistry, California State University, Los Angeles, CA, USA
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Tomazelli Coltro WK, Cheng CM, Carrilho E, de Jesus DP. Recent advances in low-cost microfluidic platforms for diagnostic applications. Electrophoresis 2014; 35:2309-24. [DOI: 10.1002/elps.201400006] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/14/2014] [Accepted: 03/15/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Wendell Karlos Tomazelli Coltro
- Instituto de Química; Universidade Federal de Goiás; Goiânia-GO Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica; Campinas-SP Brazil
| | - Chao-Min Cheng
- Institute of Nanoengineering and Microsystems; National Tsing Hua University; Hsinchu Taiwan
| | - Emanuel Carrilho
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica; Campinas-SP Brazil
- Instituto de Química de São Carlos; Universidade de São Paulo; São Carlos-SP Brazil
| | - Dosil Pereira de Jesus
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica; Campinas-SP Brazil
- Institute of Chemistry; University of Campinas; UNICAMP; Campinas-SP Brazil
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25
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Salieb-Beugelaar GB, Hunziker PR. Towards nano-diagnostics for rapid diagnosis of infectious diseases – current technological state. EUROPEAN JOURNAL OF NANOMEDICINE 2014. [DOI: 10.1515/ejnm-2014-0004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Wang Q, Wang H, Yang X, Wang K, Liu F, Zhao Q, Liu P, Liu R. Multiplex detection of nucleic acids using a low cost microfluidic chip and a personal glucose meter at the point-of-care. Chem Commun (Camb) 2014; 50:3824-6. [DOI: 10.1039/c4cc00133h] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple assay for multiplex DNA detection has been developed using a low cost microfluidic chip and a personal glucose meter.
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Affiliation(s)
- Qing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Hui Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Fang Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Qing Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Pei Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
| | - Rongjuan Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082, China
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Yang CY, Kuan CM, Yeh JA, Cheng CM. Fabricating millimeter-scale polymeric structures for biomedical applications via a combination of UV-activated materials and daily-use tools. RSC Adv 2014. [DOI: 10.1039/c4ra00631c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three-dimensional millimeter-scale polymeric structures can be fabricated by using UV-activated materials and daily-use tools for making PDMS-basedin vitrodiagnostic devices.
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Affiliation(s)
- Chung-Yao Yang
- Institute of Nanoengineering and Microsystems
- National Tsing Hua University
- Hsinchu 30013, Taiwan
| | - Chen-Meng Kuan
- Institute of Nanoengineering and Microsystems
- National Tsing Hua University
- Hsinchu 30013, Taiwan
| | - J. Andrew Yeh
- Institute of Nanoengineering and Microsystems
- National Tsing Hua University
- Hsinchu 30013, Taiwan
| | - Chao-Min Cheng
- Institute of Nanoengineering and Microsystems
- National Tsing Hua University
- Hsinchu 30013, Taiwan
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Thom NK, Lewis GG, Yeung K, Phillips ST. Quantitative Fluorescence Assays Using a Self-Powered Paper-Based Microfluidic Device and a Camera-Equipped Cellular Phone. RSC Adv 2014; 4:1334-1340. [PMID: 24490035 PMCID: PMC3904390 DOI: 10.1039/c3ra44717k] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Fluorescence assays often require specialized equipment and, therefore, are not easily implemented in resource-limited environments. Herein we describe a point-of-care assay strategy in which fluorescence in the visible region is used as a readout, while a camera-equipped cellular phone is used to capture the fluorescent response and quantify the assay. The fluorescence assay is made possible using a paper-based microfluidic device that contains an internal fluidic battery, a surface-mount LED, a 2-mm section of a clear straw as a cuvette, and an appropriately-designed small molecule reagent that transforms from weakly fluorescent to highly fluorescent when exposed to a specific enzyme biomarker. The resulting visible fluorescence is digitized by photographing the assay region using a camera-equipped cellular phone. The digital images are then quantified using image processing software to provide sensitive as well as quantitative results. In a model 30 min assay, the enzyme β-D-galactosidase was measured quantitatively down to 700 pM levels. This Communication describes the design of these types of assays in paper-based microfluidic devices and characterizes the key parameters that affect the sensitivity and reproducibility of the technique.
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Affiliation(s)
- Nicole K. Thom
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Gregory G. Lewis
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Kimy Yeung
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Scott T. Phillips
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
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Bandopadhyay A, Dhar J, Chakraborty S. Effects of solvent-mediated nonelectrostatic ion-ion interactions on a streaming potential in microchannels and nanochannels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:033014. [PMID: 24125351 DOI: 10.1103/physreve.88.033014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 06/02/2023]
Abstract
Here, we capture the consequences of solvent-mediated nonelectrostatic ion-ion interactions, coupled with the considerations of finite-sized effects of the ionic species, on electrokinetic transport in narrow fluidic confinements. We consider pressure-driven flow in microchannels and nanochannels in the presence of electrical double layer effects and analyze the establishment of a streaming potential as mediated by a Yukawa-like pair potential that integrates the ion specificity with the governing nonelectrostatic interactions. We bring out the influences of these interactions on electroviscous effects manifested due to the establishment of the streaming potential. Our considerations provide a plausible explanation for the gross overestimation of electrokinetic energy conversion efficiencies as predicted by classical electrical double layer theories that ignore nonelectrostatic interactions between the ionic species.
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Affiliation(s)
- Aditya Bandopadhyay
- Advanced Technology Development Center, Indian Institute of Technology Kharagpur, Kharagpur, India 721302
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Gabriel EFM, do Lago CL, Gobbi ÂL, Carrilho E, Coltro WKT. Characterization of microchip electrophoresis devices fabricated by direct-printing process with colored toner. Electrophoresis 2013; 34:2169-76. [DOI: 10.1002/elps.201300024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 03/04/2013] [Accepted: 04/02/2013] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Ângelo L. Gobbi
- Laboratório de Microfabricação; Laboratório Nacional de Nanotecnologia; Campinas, SP; Brazil
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On-chip immunoassay of a cardiac biomarker in serum using a polyester-toner microchip. Talanta 2013; 109:20-5. [DOI: 10.1016/j.talanta.2013.03.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 03/09/2013] [Accepted: 03/12/2013] [Indexed: 11/21/2022]
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32
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Oliveira KA, Rodrigues de Oliveira C, Antonelli da Silveira L, Tomazelli Coltro WK. Laser-printing of toner-based 96-microzone plates for immunoassays. Analyst 2013; 138:1114-21. [DOI: 10.1039/c2an36532d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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