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A visual bio-barcode immunoassay for sensitive detection of triazophos based on biochip silver staining signal amplification. Food Chem 2021; 347:129024. [PMID: 33461115 DOI: 10.1016/j.foodchem.2021.129024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 01/01/2021] [Accepted: 01/02/2021] [Indexed: 12/25/2022]
Abstract
Herein, a novel visual method for detecting triazophos based on competitive bio-barcode immunoassay was described. The competitive immunoassay was established by gold nanoparticles (AuNPs), magnetic microparticle (MMPs) and triazophos, combined with biochip hybridization system to detect the residual of triazophos in water and apple. Because AuNPs carried many bio-barcodes, which hybridized with labeled DNA on the biochip, catalyzed signal amplification using silver staining was detected by grayscale values as well as the naked eye. Notably, the grayscale values decreases with increasing the concentrations of triazophos, and the color change weakened gradually. The detection range was in between 0.05 and 10 ng/mL and the minimum detection limit was set at 0.04 ng/mL. Percent recovery calculated from spiked water and apple samples ranged between 55.4 and 107.8% with relative standard deviations (RSDs) of 12.4-24.9%. It has therefore been shown that this protocol provides a new insight for rapid detection of small molecule pesticides in various matrices.
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2
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Kwak J, Lee SS. Highly sensitive piezoelectric immunosensors employing signal amplification with gold nanoparticles. NANOTECHNOLOGY 2019; 30:445502. [PMID: 31362281 DOI: 10.1088/1361-6528/ab36c9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present a quartz crystal microbalance (QCM) immunosensor for highly sensitive detection of prostate-specific antigen (PSA) in a human serum immunoassay. In particular, in this study, we employed signal amplification using and enlarging gold nanoparticles. Because QCM measures the change of resonance frequency according to the mass change occurring on the sensor surface, we could quantitatively analyze PSA based on a tremendous increase in mass by sandwich immunoassay using AuNP-conjugated anti-PSA-detecting antibody enhanced with subsequent gold staining. The limit of detection of the PSA immunoassay in human serum without gold staining enhancement was 687 pg ml-1 but was 48 pg ml-1 with the gold staining-mediated signal amplification. That is, amplifying the signal resulted in increased sensitivity and reproducibility of immunoassay in a human serum.
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Affiliation(s)
- Jiwon Kwak
- Department of Pharmaceutical Engineering, Soonchunhyang University, Asan, Republic of Korea
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3
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Impedimetric detection of bacteria by using a microfluidic chip and silver nanoparticle based signal enhancement. Mikrochim Acta 2018; 185:184. [PMID: 29594583 DOI: 10.1007/s00604-017-2645-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 12/28/2017] [Indexed: 01/16/2023]
Abstract
The authors describe a method that can significantly improve the performance of impedimetric detection of bacteria. A multifunctional microfluidic chip was designed consisting of interdigitated microelectrodes and a micro-mixing zone with a Tesla structure. This maximizes the coating of bacterial surfaces with nanoparticles and results in improved impedimetric detection. The method was applied to the detection of Escherichia coli O157:H7 (E. coli). Silver enhancement was accomplished by coating E.coli with the cationic polymer diallyldimethylammonium chloride (PDDA) to form positively charged E. coli/PDDA complexes. Then, gold nanoparticles (AuNPs) were added, and the resulting E. coli/PDDA/AuNPs complexes were collected at interdigitated electrodes via positive dielectrophoresis (pDEP). A silver adduct was then formed on the E. coli/PDDA/AuNP complexes by using silver enhancement solutions and by using the AuNPs as catalysts. The combination of pDEP based capture and of using silver adducts reduces impedance by increasing the conductivity of the solution and the double layer capacitance around the microelectrodes. Impedance decreases linearly in the 2 × 103-2 × 105 cfu·mL-1 E. coli concentration range, with a 500 cfu·mL-1 detection limit. Egg shell wash samples and tap water spiked with E. coli were successfully used for validation, and this demonstrates the practical application of this method. Graphical abstract Schematic representation of the AuNP@Ag enhancement method integrated with multifunctional microfluidic chip platform for impedimetric quantitation of bacteria. The method significantly improves the performance of impedimetric detection of bacteria.
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Wiederoder MS, Kendall E, Han JH, Ulrich R, DeVoe DL. Flow-through microfluidic immunosensors with refractive index-matched silica monoliths as volumetric optical detection elements. SENSORS AND ACTUATORS. B, CHEMICAL 2018; 254:878-886. [PMID: 29225421 PMCID: PMC5716804 DOI: 10.1016/j.snb.2017.07.137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A sensitive and rapid absorbance based immunosensor that utilizes ex situ functionalized porous silica monoliths as volumetric optical detection elements is demonstrated in this study. The porous monolith structure facilitates high capture probe density and short diffusion length scales, enabling sensitive and rapid assays. Silica monoliths, synthesized and functionalized with immunocapture probes off-chip before integration into a sealed thermoplastic microfluidic device, serve to capture target antigens during perfusion through the porous structure. Gold nanoparticle immunoconjugates are combined with silver enhancement to create microscale silver clusters, followed by perfusion of an aqueous sucrose solution to limit light scattering and enhance optical signal. Using this approach, detection limits as low as 1 ng/mL are achieved for a sandwich assay, with a dynamic range of at least 4 logs. The results confirm that the combination of on-chip index matching with functionalized porous silica monoliths can enables simple and practical flow-through immunoassays for the sensitive and rapid detection of target antigens.
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Affiliation(s)
- M. S. Wiederoder
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| | - E.L. Kendall
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USA
| | - J.-H. Han
- Molecular and Translational Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Frederick, Maryland, USA
| | - R.G. Ulrich
- Molecular and Translational Sciences, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), Frederick, Maryland, USA
| | - D. L. DeVoe
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USA
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5
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Electrochemical biosensor for silver ions based on amplification of DNA–Au bio–bar codes and silver enhancement. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2016.12.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Wiederoder MS, Misri I, DeVoe DL. Impedimetric Immunosensing in a Porous Volumetric Microfluidic Detector. SENSORS AND ACTUATORS. B, CHEMICAL 2016; 234:493-497. [PMID: 27721569 PMCID: PMC5053616 DOI: 10.1016/j.snb.2016.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A sensitive and rapid impedemetric immunosensor is demonstrated utilizing porous volumetric microfluidic detection elements and silver enhanced gold nanoparticle probes. The porous detection elements significantly increase capture probe density and decrease diffusion length scales compared to conventional planar sensors to improve target capture efficiency and enhance impedance signal. In this work, a packed bed of silica beads functionalized with antibody probes serves as a porous sensor element within a thermoplastic microchannel, with an interdigitated gold electrode microarray used to measure impedance changes caused by the concentration dependent formation of silver aggregates. The measured impedance change is independent of electrode spacing, enabling a device with low resolution electrodes to achieve a sandwich immunoassay detection limit between 1-10 ng/mL with a 4-log dynamic range, with a total assay time of 75 min.
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Affiliation(s)
- Michael S Wiederoder
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| | - Isaac Misri
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USA
| | - Don L DeVoe
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA; Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USA
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Ko W, Yim C, Jung N, Joo J, Jeon S, Seo H, Lee SS, Park JC. A visible light-induced photocatalytic silver enhancement reaction for gravimetric biosensors. NANOTECHNOLOGY 2011; 22:405502. [PMID: 21911922 DOI: 10.1088/0957-4484/22/40/405502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have developed a novel microgravimetric immunosensor using a WO(3) nanoparticle-modified immunoassay and a silver enhancement reaction. When the nanoparticles in silver ion solution (i.e. AgNO(3)) are exposed to visible light, the silver ions are photocatalytically reduced and form a metallic silver coating on the nanoparticles. This silver coating consequently induces changes in the mass and light absorption spectrum. Although photocatalytic reduction reactions can be achieved using ultraviolet (UV) light and TiO(2) nanoparticles as described in our previous publication (Seo et al 2010 Nanotechnology 21 505502), the use of UV light in biosensing applications has drawbacks in that UV light can damage proteins. In addition, conventional quartz crystal substrates must be passivated to prevent undesirable silver ion reduction on their gold-coated sensing surfaces. We addressed these problems by adopting a visible light-induced photocatalytic silver enhancement method using WO(3) nanoparticles and lateral field excited (LFE) quartz crystals. As a proof-of-concept demonstration of the technique, streptavidin was adsorbed onto an LFE quartz crystal, and its mass was enhanced with biotinylated WO(3) nanoparticles, this being followed by a photocatalytic silver enhancement reaction. The mass change due to the enhancement was found to be > 30 times greater than the mass change obtained with the streptavidin alone.
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Affiliation(s)
- Wooree Ko
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
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8
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Cao X, Ye Y, Liu S. Gold nanoparticle-based signal amplification for biosensing. Anal Biochem 2011; 417:1-16. [DOI: 10.1016/j.ab.2011.05.027] [Citation(s) in RCA: 301] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 05/09/2011] [Accepted: 05/17/2011] [Indexed: 12/11/2022]
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Hao N, Li H, long Y, Zhang L, Zhao X, Xu D, Chen HY. An electrochemical immunosensing method based on silver nanoparticles. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.01.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Nanoparticle-based electrochemical detection in conventional and miniaturized systems and their bioanalytical applications: A review. Anal Chim Acta 2011; 690:10-25. [DOI: 10.1016/j.aca.2011.01.054] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 01/26/2011] [Accepted: 01/27/2011] [Indexed: 01/04/2023]
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Liu R, Liu X, Tang Y, Wu L, Hou X, Lv Y. Highly Sensitive Immunoassay Based on Immunogold−Silver Amplification and Inductively Coupled Plasma Mass Spectrometric Detection. Anal Chem 2011; 83:2330-6. [DOI: 10.1021/ac103265z] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Liu
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xing Liu
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Tang
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Li Wu
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiandeng Hou
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yi Lv
- College of Chemistry and ‡Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
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Seo H, Joo J, Ko W, Jung N, Jeon S. Photocatalytic silver enhancement reaction for gravimetric immunosensors. NANOTECHNOLOGY 2010; 21:505502. [PMID: 21098950 DOI: 10.1088/0957-4484/21/50/505502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A novel microgravimetric immunosensor has been developed using TiO(2) nanoparticle-modified immunoassay and silver enhancement reaction. An antibody-conjugated TiO(2) nanoparticle is bound to the AFP antigen immobilized on a quartz resonator. When the nanoparticles are exposed to UV light in a silver nitrate solution, the photocatalytic reduction of silver ions results in the formation of metallic silver onto the nanoparticles and induces a decrease in the resonance frequency. The frequency change by this photocatalytic reduction reaction is three orders of magnitude larger than the change by antigen binding alone. The efficiency of the photocatalytic reaction has been found to increase with the fraction of anatase crystallites in the nanoparticles and the concentration of the AgNO(3) solution. The results highlight the potential of the photocatalytic nanoparticles for the detection of low concentrations of target molecules using gravimetric sensors.
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Affiliation(s)
- Hyejung Seo
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Korea
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Yeh CH, Chen WT, Lin HP, Chang TC, Lin YC. A newly developed immunoassay method based on optical measurement for Protein A detection. Talanta 2010; 83:55-60. [DOI: 10.1016/j.talanta.2010.08.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 08/20/2010] [Accepted: 08/24/2010] [Indexed: 11/30/2022]
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Wang W, Wu WY, Zhong X, Wang W, Miao Q, Zhu JJ. Aptamer-based PDMS-gold nanoparticle composite as a platform for visual detection of biomolecules with silver enhancement. Biosens Bioelectron 2010; 26:3110-4. [PMID: 21227677 DOI: 10.1016/j.bios.2010.10.034] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 10/12/2010] [Accepted: 10/21/2010] [Indexed: 11/28/2022]
Abstract
A sensitive colorimetric detection for biomolecules based on aptamer was described. Poly(dimethylsiloxane) (PDMS)-gold nanoparticles (AuNPs) composite film was used as a platform for immobilizing anti-target aptamer. PDMS-AuNPs composite film only covered with aptamer showed high inhibiting ability towards silver reduction, after target molecules were conjugated on the modified surface, the catalytic efficiency of AuNPs for silver reduction was increased. In this system, the darkness density of silver enhancement was applied for target quantitative measurement. Lysozyme and adenosine 5'-triphosphate (ATP) were tested as the models, quantitative measurements with imaging software or semiquantitative measurements with naked eyes were carried out in the range of 1×10(-2)-1 μg/mL and 1×10(-4)-1×10(3) μg/mL, the volume of reagent using in each assay is 15 μL or less. We speculated that aptamer-target conjugates' inhibition ability for AuNPs' catalytic efficiency toward silver reduction might come from charge and spatial effects. This study can offer a completely novel and relatively general approach for colorimetrical aptamer sensors with good analytical properties and potential applications. The sensor could be coupled with digital transmission of images for remote monitoring system in diagnosis, food control, and environmental analysis.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Analytical Chemistry for Life Science (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, PR China
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15
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Liu Y, Zhang D, Alocilja EC, Chakrabartty S. Biomolecules Detection Using a Silver-Enhanced Gold Nanoparticle-Based Biochip. NANOSCALE RESEARCH LETTERS 2010; 5:533-538. [PMID: 20672093 PMCID: PMC2894031 DOI: 10.1007/s11671-010-9542-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Accepted: 01/16/2010] [Indexed: 05/29/2023]
Abstract
Silver-enhanced labeling method has been employed in immunochromatographic assays for improving the sensitivity of detecting pathogens. In this paper, we apply the silver enhancement technique for biomolecular signal amplification in a gold nanoparticle-based conductimetric biochip. We show that the response of the silver-enhanced biochip comprises two distinct regions namely: (a) a sub-threshold region where conduction occurs due to electron hopping between silver islands and the electrolyte and (b) an above-threshold region where the conduction is due to a direct flow of electrons. These two regions are characterized by different conduction slopes, and we show that combining the information from both these regions can improve the sensitivity of the biochip. Results from fabricated prototypes show a dynamic range of more than 40 dB and with a detection limit less than 240 pg/mL. The fabrication of the biochip is compatible with standard complementary metal-oxide-semiconductor (CMOS) processes making it ideal for integration in next-generation CMOS biosensors.
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Affiliation(s)
- Yang Liu
- Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Deng Zhang
- Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Evangelyn C Alocilja
- Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Shantanu Chakrabartty
- Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA
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Tran NT, Ayed I, Pallandre A, Taverna M. Recent innovations in protein separation on microchips by electrophoretic methods: An update. Electrophoresis 2010; 31:147-73. [DOI: 10.1002/elps.200900465] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Yeh CH, Chang YH, Chang TC, Lin HP, Lin YC. Electro-microchip DNA-biosensor for bacteria detection. Analyst 2010; 135:2717-22. [DOI: 10.1039/c0an00186d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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