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Bezinge L, Shih CJ, Richards DA, deMello AJ. Electrochemical Paper-Based Microfluidics: Harnessing Capillary Flow for Advanced Diagnostics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401148. [PMID: 38801400 DOI: 10.1002/smll.202401148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 04/29/2024] [Indexed: 05/29/2024]
Abstract
Electrochemical paper-based microfluidics has attracted much attention due to the promise of transforming point-of-care diagnostics by facilitating quantitative analysis with low-cost and portable analyzers. Such devices harness capillary flow to transport samples and reagents, enabling bioassays to be executed passively. Despite exciting demonstrations of capillary-driven electrochemical tests, conventional methods for fabricating electrodes on paper impede capillary flow, limit fluidic pathways, and constrain accessible device architectures. This account reviews recent developments in paper-based electroanalytical devices and offers perspective by revisiting key milestones in lateral flow tests and paper-based microfluidics engineering. The study highlights the benefits associated with electrochemical sensing and discusses how the detection modality can be leveraged to unlock novel functionalities. Particular focus is given to electrofluidic platforms that embed electrodes into paper for enhanced biosensing applications. Together, these innovations pave the way for diagnostic technologies that offer portability, quantitative analysis, and seamless integration with digital healthcare, all without compromising the simplicity of commercially available rapid diagnostic tests.
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Affiliation(s)
- Léonard Bezinge
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich, 8093, Switzerland
| | - Chih-Jen Shih
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich, 8093, Switzerland
| | - Daniel A Richards
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich, 8093, Switzerland
| | - Andrew J deMello
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich, 8093, Switzerland
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2
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Ruengpirasiri P, Charoensin P, Aniwattapong A, Natekuekool P, Srisomwat C, Pinyorospathum C, Chaiyo S, Yakoh A. Graphene Pseudoreference Electrode for the Development of a Practical Paper-Based Electrochemical Heavy Metal Sensor. ACS OMEGA 2024; 9:1634-1642. [PMID: 38222522 PMCID: PMC10785785 DOI: 10.1021/acsomega.3c08249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/23/2023] [Accepted: 11/29/2023] [Indexed: 01/16/2024]
Abstract
Paper-based electrochemical devices (PEDs) have emerged as versatile platforms that bridge analytical chemistry and materials science, demonstrating advantages of portability, cost-effectiveness, and environmental sustainability. This study investigates the integration of a graphene pseudoreference electrode (GPRE) into a PED, and it exhibits potential advantages over the traditional Ag/AgCl pseudoreference electrode (PRE). In addition, the electrochemical properties and stability of GPRE are compared with those of the traditional Ag/AgCl PRE. The results demonstrate that GPRE exhibits a stable and reproducible potential during electrochemical measurement throughout 180 days, demonstrating its suitability as an alternative to an expensive metal PRE. Furthermore, a GPRE-incorporated paper-based device is designed and evaluated for use in the electrochemical detection of cadmium (Cd) and lead (Pb) using an in situ bismuth-modified electrode. The GPRE-incorporated PED exhibited good analytical performance, with a low limit of detection of 0.69 and 5.77 ng mL-1 and electrochemical sensitivities of 70.16 and 38.34 μA·mL·μg-1·cm-2 for Cd(II) and Pb(II), respectively. More than 99.9% accuracy of the sensor was obtained for both ions with respect to conventional inductively coupled plasma-mass spectrometry. The results highlight the effectiveness and suitability of the GPRE-incorporated PED as a sensor for various applications, such as environmental monitoring, food quality control, and medical diagnostics.
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Affiliation(s)
| | - Pimchanok Charoensin
- Kamnoetvidya
Science Academy, 999 Moo. 1, Payupnai, Wangchan, Rayong 21210, Thailand
| | - Akkrawat Aniwattapong
- Kamnoetvidya
Science Academy, 999 Moo. 1, Payupnai, Wangchan, Rayong 21210, Thailand
| | - Pemika Natekuekool
- Kamnoetvidya
Science Academy, 999 Moo. 1, Payupnai, Wangchan, Rayong 21210, Thailand
| | - Chawin Srisomwat
- Department
of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand
| | - Chanika Pinyorospathum
- National
Laboratory Animal Center, Mahidol University, Nakhon Pathom 73170, Thailand
- Analytical
Sciences and National Doping Test Institute, Mahidol University, Bangkok 10400, Thailand
| | - Sudkate Chaiyo
- The
Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
- Center
of Excellence for Food and Water Risk Analysis (FAWRA), Department
of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Abdulhadee Yakoh
- The
Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
- Center
of Excellence for Food and Water Risk Analysis (FAWRA), Department
of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
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3
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Walgama C, Raj N. Silver nanoparticles in electrochemical immunosensing and the emergence of silver-gold galvanic exchange detection. Chem Commun (Camb) 2023; 59:11161-11173. [PMID: 37603415 DOI: 10.1039/d3cc02561f] [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: 08/23/2023]
Abstract
Nanoparticle-based electrochemical immunosensors demonstrate high sensitivity toward biomarker detection due to the large surface area of the nanoparticles and their ability to amplify the signal of the target molecule. Additionally, they have a fast response time, relatively lower cost, and can be easily miniaturized for point-of-care applications. Among noble metals, silver nanoparticles (AgNPs) have been extensively used in electrochemical sensors due to their unique properties, such as catalytic activity and excellent electrical conductivity. This Feature Article describes six approaches for incorporating AgNPs in electrochemical platforms, featuring the most recent developments in the silver-gold galvanic exchange-based detection strategy. With a few exceptions, many of these detection methods use AgNP oxidation into Ag+ ions, followed by electrodeposition of Ag+ ions onto the working electrode as zero-valent Ag metal and a final stripping step using a voltammetric technique. Combining these steps provides desirable low detection limits and good sensitivity for various biomarkers. A few other methods involved the reduction of Ag+ ions and depositing them as Ag metal onto the electrode using a reagent mixture so that the striping analysis could be performed. Typically, this reagent mixture includes Ag+ ions, a reducing agent, or an enzyme substrate. Besides, AgNPs have also been directly used to modify the surface of electrodes to facilitate kinetically favored redox-mediated electrochemical reactions. In addition to Ag detection methods, this report will also provide recent examples to illustrate how the size and shape of AgNPs impact the detection limits and sensitivity of an electrochemical assay. Finally, we discuss recent developments in lab-on-a-chip type immunosensors designed explicitly for Ag-based metalloimmunoassay detection, and we envision that this article will provide a comprehensive summary of the operational principles and new insights into such immunoassay systems.
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Affiliation(s)
- Charuksha Walgama
- Department of Physical & Applied Sciences, University of Houston-Clear Lake, 2700 Bay Area Boulevard, Houston, TX 77058, USA.
| | - Nikhil Raj
- Amgen Inc, 1 Amgen Center Dr, Thousand Oaks, CA 91320, USA
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Sandoval Bojórquez D, Janićijević Ž, Palestina Romero B, Oliveros Mata ES, Laube M, Feldmann A, Kegler A, Drewitz L, Fowley C, Pietzsch J, Fassbender J, Tonn T, Bachmann M, Baraban L. Impedimetric Nanobiosensor for the Detection of SARS-CoV-2 Antigens and Antibodies. ACS Sens 2023; 8:576-586. [PMID: 36763494 PMCID: PMC9940615 DOI: 10.1021/acssensors.2c01686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Abstract
Detection of antigens and antibodies (Abs) is of great importance in determining the infection and immunity status of the population, as they are key parameters guiding the handling of pandemics. Current point-of-care (POC) devices are a convenient option for rapid screening; however, their sensitivity requires further improvement. We present an interdigitated gold nanowire-based impedance nanobiosensor to detect COVID-19-associated antigens (receptor-binding domain of S1 protein of the SARS-CoV-2 virus) and respective Abs appearing during and after infection. The electrochemical impedance spectroscopy technique was used to assess the changes in measured impedance resulting from the binding of respective analytes to the surface of the chip. After 20 min of incubation, the sensor devices demonstrate a high sensitivity of about 57 pS·sn per concentration decade and a limit of detection (LOD) of 0.99 pg/mL for anti-SARS-CoV-2 Abs and a sensitivity of around 21 pS·sn per concentration decade and an LOD of 0.14 pg/mL for the virus antigen detection. Finally, the analysis of clinical plasma samples demonstrates the applicability of the developed platform to assist clinicians and authorities in determining the infection or immunity status of the patients.
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Affiliation(s)
| | - Željko Janićijević
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Brenda Palestina Romero
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Eduardo Sergio Oliveros Mata
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Markus Laube
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Anja Feldmann
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Alexandra Kegler
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Laura Drewitz
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Ciarán Fowley
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Jens Pietzsch
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
- School
of Sciences, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01307 Dresden, Germany
| | - Juergen Fassbender
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
| | - Torsten Tonn
- Transfusion
Medicine, Med. Faculty Carl-Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
- Institute
for Transfusion Medicine Dresden, German
Red Cross Blood Donation Service North-East, 01307 Dresden, Germany
| | - Michael Bachmann
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
- Tumor
Immunology, University Cancer Center (UCC), University Hospital Carl
Gustav Carus Dresden, Technische Universität
Dresden, 01307 Dresden, Germany
- National
Center for Tumor Diseases (NCT), Dresden, Germany. Faculty of Medicine
and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
- German Cancer
Research Center (DKFZ), 69120 Heidelberg, Germany
- German
Cancer Consortium (DKTK), 01309 Dresden, Germany
| | - Larysa Baraban
- Institute
of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf
e.V. (HZDR), 01328 Dresden, Germany
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Peng Y, Raj N, Strasser JW, Crooks RM. Paper Biosensor for the Detection of NT-proBNP Using Silver Nanodisks as Electrochemical Labels. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2254. [PMID: 35808093 PMCID: PMC9268099 DOI: 10.3390/nano12132254] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/17/2022] [Accepted: 06/24/2022] [Indexed: 02/04/2023]
Abstract
We report on the use of silver nanodisks (AgNDs), having a diameter of 50 ± 8 nm and a thickness of 8 ± 2 nm, as electrochemical labels for the detection of a model metalloimmunoassay for the heart failure biomarker NT-proBNP. The detection method is based on an electrochemically activated galvanic exchange (GE) followed by the detection of Ag using anodic stripping voltammetry (ASV). The AgNDs labels are superior to Ag nanocubes and Ag nanospheres in terms of the dynamic range for both the model and NT-proBNP metalloimmunoassays. The linear dynamic range for the model composite is 1.5 to 30.0 pM AgNDs. When AgND labels are used for the NT-proBNP assay, the dynamic range is 0.03-4.0 nM NT-proBNP. The latter range fully overlaps the risk stratification range for heart failure from 53 pM to 590 pM. The performance improvement of the AgNDs is a result of the specific GE mechanism for nanodisks. Specifically, GE is complete across the face of the AgNDs, leaving behind an incompletely exchanged ring structure composed of both Ag and Au.
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Affiliation(s)
| | | | | | - Richard M. Crooks
- Department of Chemistry, The University of Texas at Austin, 100 E. 24th St., Stop A1590, Austin, TX 78712-1224, USA; (Y.P.); (N.R.); (J.W.S.)
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Raj N, Crooks RM. Plastic-based lateral flow immunoassay device for electrochemical detection of NT-proBNP. Analyst 2022; 147:2460-2469. [PMID: 35531909 PMCID: PMC9178520 DOI: 10.1039/d2an00685e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Here we report an easily fabricated, plastic-based lateral flow device for carrying out metalloimmunoassays. The device is called ocFlow to emphasize the open-channel design. We have shown that the ocFlow is capable of magnetic microbead (MμB)-based metalloimmunoassays for the detection of two types of immunoconjugates: a model composite (MC) and a sandwich immunoassay for the heart failure marker NT-proBNP. In both assays, Ag nanoparticles (AgNPs) were used as electrochemically detectable labels. NT-proBNP and MC concentrations as low as 750.0 pM and 10.0 pM, respectively, could be detected using the ocFlow device. Four key conclusions can be drawn from the results presented herein. First, immunoconjugates attached to the MμBs can be transported in the flow channel using combined hydrodynamic and capillary pressure passive pumping. Second, the ocFlow device is capable of on-chip storage, resolvation, and conjugate formation of both the MC and NT-proBNP composites. Third, electrochemical detection can be conducted on analytes suspended in serum by rinsing the electrodes with a wash buffer. Finally, and perhaps most significantly, the assay is quantitative and has a detection limit for NT-proBNP in the high picomolar range when the necessary reagents are stored on the device in a dry form.
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Affiliation(s)
- Nikhil Raj
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street, Stop A5300, Austin, Texas 78712-1224, USA.
| | - Richard M Crooks
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street, Stop A5300, Austin, Texas 78712-1224, USA.
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7
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Weiß LJK, Lubins G, Music E, Rinklin P, Banzet M, Peng H, Terkan K, Mayer D, Wolfrum B. Single-Impact Electrochemistry in Paper-Based Microfluidics. ACS Sens 2022; 7:884-892. [PMID: 35235291 DOI: 10.1021/acssensors.1c02703] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Microfluidic paper-based analytical devices (μPADs) have experienced an unprecedented story of success. In particular, as of today, most people have likely come into contact with one of their two most famous examples─the pregnancy or the SARS-CoV-2 antigen test. However, their sensing performance is constrained by the optical readout of nanoparticle agglomeration, which typically allows only qualitative measurements. In contrast, single-impact electrochemistry offers the possibility to quantify species concentrations beyond the pM range by resolving collisions of individual species on a microelectrode. Within this work, we investigate the integration of stochastic sensing into a μPAD design by combining a wax-patterned microchannel with a microelectrode array to detect silver nanoparticles (AgNPs) by their oxidative dissolution. In doing so, we demonstrate the possibility to resolve individual nanoparticle collisions in a reference-on-chip configuration. To simulate a lateral flow architecture, we flush previously dried AgNPs along a microchannel toward the electrode array, where we are able to record nanoparticle impacts. Consequently, single-impact electrochemistry poses a promising candidate to extend the limits of lateral flow-based sensors beyond current applications toward a fast and reliable detection of very dilute species on site.
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Affiliation(s)
- Lennart J. K. Weiß
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Georg Lubins
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Emir Music
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Philipp Rinklin
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Marko Banzet
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Hu Peng
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Korkut Terkan
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Bernhard Wolfrum
- Neuroelectronics─Munich Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
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