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Sun X, Zhang B, Chen W. Electrochemical Chip Combined with Immunomagnetic Beads Enrichment for the Detection of Peach Gum Binding Medium in Ancient Wall Paintings. ANAL LETT 2023. [DOI: 10.1080/00032719.2023.2187412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Affiliation(s)
- Xiaolu Sun
- Department of Chemistry, Zhejiang University, Hangzhou, China
| | - Bingjian Zhang
- Department of Cultural Heritage and Museology, Zhejiang University, Hangzhou, China
| | - Weixiang Chen
- Department of Chemistry, Zhejiang University, Hangzhou, China
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Khoris IM, Nasrin F, Chowdhury AD, Park EY. Advancement of dengue virus NS1 protein detection by 3D-nanoassembly complex gold nanoparticles utilizing competitive sandwich aptamer on disposable electrode. Anal Chim Acta 2022; 1207:339817. [DOI: 10.1016/j.aca.2022.339817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/18/2022] [Accepted: 04/06/2022] [Indexed: 12/25/2022]
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Lorenzen AL, dos Santos AM, dos Santos LP, da Silva Pinto L, Conceição FR, Wolfart F. PEDOT-AuNPs-based impedimetric immunosensor for the detection of SARS-CoV-2 antibodies. Electrochim Acta 2022; 404:139757. [PMID: 34955549 PMCID: PMC8684030 DOI: 10.1016/j.electacta.2021.139757] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/11/2021] [Accepted: 12/16/2021] [Indexed: 12/16/2022]
Abstract
Electrochemical sensors and biosensors are useful techniques for fast, inexpensive, sensitive, and easy detection of innumerous specimen. In face of COVID-19 pandemic, it became evident the necessity of a rapid and accurate diagnostic test, so the impedimetric immunosensor approach can be a good alternative to replace the conventional tests due to the specific antibody-antigen binding interaction and the fast response in comparison to traditional methods. In this work, a modified electrode with electrosynthesized PEDOT and gold nanoparticles followed by the immobilization of truncated nucleoprotein (N aa160-406aa) was used for a fast and reliable detection of antibodies against COVID-19 in human serum sample. The method consists in analyzing the charge-transfer resistance (RCT) variation before and after the modified electrode comes into contact with the positive and negative serum sample for COVID-19, using [Fe(CN)6]3-/4- as a probe. The results show a linear and selective response for serum samples diluted in a range of 2.5 × 103 to 20 × 103. Also, the electrode material was fully characterized by Raman spectroscopy, transmission electron microscopy and scanning electron microscopy coupled with EDS, indicating that the gold nanoparticles were well distributed around the polymer matrix and the presence of the biological sample was confirmed by EDS analysis. EIS measurements allowed to differentiate the negative and positive samples by the difference in the RCT magnitude, proving that the material developed here has potential properties to be applied in impedimetric immunosensors for the detection of SARS-CoV-2 antibodies in about 30 min.
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Affiliation(s)
- Ana Luiza Lorenzen
- Instituto Federal de Educação, Ciência e Tecnologia Farroupilha – Campus São Borja, Rua Otaviano Castilho Mendes, 355, Betim, São Borja, RS CEP 97670-000, Brazil
| | - Ariane Moraes dos Santos
- Instituto Federal de Educação, Ciência e Tecnologia Farroupilha – Campus São Borja, Rua Otaviano Castilho Mendes, 355, Betim, São Borja, RS CEP 97670-000, Brazil
| | - Luâni Poll dos Santos
- Instituto Federal de Educação, Ciência e Tecnologia Farroupilha – Campus São Borja, Rua Otaviano Castilho Mendes, 355, Betim, São Borja, RS CEP 97670-000, Brazil
| | - Luciano da Silva Pinto
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia – Campus Capão do Leão, S/N, Capão do Leão, RS CEP 96160-000, Brazil
| | - Fabricio Rochedo Conceição
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia – Campus Capão do Leão, S/N, Capão do Leão, RS CEP 96160-000, Brazil
| | - Franciele Wolfart
- Instituto Federal de Educação, Ciência e Tecnologia Farroupilha – Campus São Borja, Rua Otaviano Castilho Mendes, 355, Betim, São Borja, RS CEP 97670-000, Brazil,Corresponding author
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Mirzajani H, Cheng C, Vafaie RH, Wu J, Chen J, Eda S, Aghdam EN, Ghavifekr HB. Optimization of ACEK-enhanced, PCB-based biosensor for highly sensitive and rapid detection of bisphenol a in low resource settings. Biosens Bioelectron 2021; 196:113745. [PMID: 34753078 DOI: 10.1016/j.bios.2021.113745] [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] [Received: 08/15/2021] [Revised: 10/18/2021] [Accepted: 10/28/2021] [Indexed: 11/02/2022]
Abstract
In this study, we developed a low-cost and easy-to-use capacitive biosensor employing printed-circuit-board (PCB)-based technique for electrode fabrication and a specific alternative current (AC) signal for AC Electrokinetics (ACEK) effect excitation. Fast, accurate, and highly sensitive detection and quantification of bisphenol A (BPA) was achieved. An easy characterization of the biofunctionalization process is introduced by measuring interfacial capacitance which is simple and superior to most of methods currently in use. The frequency and amplitude of the AC signal used for capacitive interrogation were optimized to achieve maximum interfacial capacitance and maximum sensitivity. To evaluate the performance of the developed biosensor, its operation was compared with in-house microfabricated and commercially available electrodes. The limit-of-detection (LOD) obtained using the PCB-based electrodes was found to be at least one order of magnitude lower than that obtained with the commercial and in-house microfabricated electrodes. The linear range for BPA detection was wide from 1 fM to 10 pM with an LOD of 109.5 aM and sample to result in 20s. The biosensor operation was validated by spike-and-recovery tests of BPA using commercial food samples. Thus, the platform has a potential as an on-site detection of bisphenol A in low-resource settings.
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Affiliation(s)
- Hadi Mirzajani
- The University of Tennessee, Knoxville, Department of Electrical Engineering and Computer Science, 1520 Middle Drive, Knoxville, TN, 37966, USA; Department of Mechanical Engineering, Koç University, Rumelifeneri Yolu, Sarıyer, 34450 Istanbul, Turkey; Sahand University of Technology, Department of Electrical Engineering, Microelectronics Research Lab., Tabriz, Iran
| | - Cheng Cheng
- The University of Tennessee, Knoxville, Department of Electrical Engineering and Computer Science, 1520 Middle Drive, Knoxville, TN, 37966, USA; School of Engineering and Computer Science, Morehead State University, 150 University Blvd., Morehead, KY, 40351, USA
| | | | - Jayne Wu
- The University of Tennessee, Knoxville, Department of Electrical Engineering and Computer Science, 1520 Middle Drive, Knoxville, TN, 37966, USA.
| | - Jiangang Chen
- The University of Tennessee, Department of Public Health, 1914 Andy Holt Avenue, Knoxville, TN, 37996, USA
| | - Shigotoshi Eda
- University of Tennessee Institute of Agriculture, Department of Forestry, Wildlife and Fisheries, 2505 E. J. Chapman Drive, Knoxville, TN, 37996, USA
| | - Esmaeil Najafi Aghdam
- Sahand University of Technology, Department of Electrical Engineering, Microelectronics Research Lab., Tabriz, Iran
| | - Habib Badri Ghavifekr
- Sahand University of Technology, Department of Electrical Engineering, Microelectronics Research Lab., Tabriz, Iran
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