نتایج جستجو برای: electrochemical immunosensor

تعداد نتایج: 52102  

Journal: :Analytical and bioanalytical chemistry 2010
Ke-Jing Huang De-Jun Niu Jun-Yong Sun Xiao-Li Zhu Jun-Jie Zhu

A novel experimental methodology based on a Prussian blue (PB) and gold nanoparticles (AuNPs) modified carbon ionic liquid electrode (CILE) was developed for use in a label-free amperometric immunosensor for the sensitive detection of human immunoglobulin G (HIgG) as a model protein. The CILE was fabricated by using the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate as binder. Con...

2016
Zhongxue Tang Zhanfang Ma

In this work, we presented a ratiometric electrochemical immunosensor based on redox substrate and immunoprobe. Carboxymethyl cellulose-Au-Pb2+ (CMC-Au-Pb2+) and carbon-Au-Cu2+ (C-Au-Cu2+) nanocomposites were firstly synthesized and implemented as redox substrate and immunoprobe with strong current signals at -0.45 V and 0.15 V, respectively. Human immunoglobulin G (IgG) was used as a model ana...

2010
Mohamad Kamal Abdul Kadir Ibtisam E. Tothill

An electrochemical affinity sensor for the determination of fumonisins mycotoxins (Fms) using monoclonal antibody modified screen-printed gold electrode with carbon counter and silver-silver chloride pseudo-reference electrode is reported in this work. A direct competitive enzyme-linked immunosorbent assay (ELISA) was initially developed, exhibiting a detection limit of 100 µg·L(-1 )for fumonis...

2010
Chang-Soo Lee Dohyoung Kwon Jeng Eun Yoo Byung Gun Lee Jinsub Choi Bong Hyun Chung

We report on the development of an enzyme-amplified sandwich-type immunosensor based on a thin gold film sputtered on an anodic nanoporous niobium oxide (Au@Nb(2)O(5)) electrode. The electrocatalytic activity of enzymatically amplified electroactive species and a stable electrode consisting of Au@Nb(2)O(5) were used to obtain a powerful signal amplification of the electrochemical immunobiosenso...

Journal: :Applied Surface Science 2022

Acute kidney injury is among the most severe health problems today, with greatest fatality ratios. The molecule-1 (KIM-1) considered to be a potential biomarker for diagnosis of acute injury. Herein, sensitive, selective, and swift sandwich-type electrochemical KIM-1 immunosensor was fabricated based on porous NiCo2S4@CeO2 microspheres as signal amplifier covalent organic frameworks-gold nanopa...

2013
Yemin Guo Zhili Gong Yaoyao Cao Xiangyou Wang Xia Sun

Electrochemical immunosensors have emerged as a highly sensitive and rapid technique for chemical contaminants detection in environmental monitoring, food safety and quality control. This review concentrates on recent advances made in detection and quantification of chemical contaminants such as pesticides and antibiotics residues with electrochemical immunosensors. In this paper, the preparati...

2014
Young-Bong Choi Namhyuk Kim Seung-Hoi Kim Gun-Sik Tae Hyug-Han Kim

By directly coordinating hippuric acid (HA) to the ferrate (Fe) as an electron transfer mediator, we synthesized a Fe-HA complex, which shows a good electrochemical signal and thus enables the electrochemical immunoanalysis for HA. We electrodeposited organic films containing imidazole groups on the electrode surface and then bonded Ni ion (positive charge) to induce immobilization of Fe-HA (ne...

Journal: :The Analyst 2009
Georgios Pampalakis Shana O Kelley

Gold nanowires functionalized for electrochemical immunosensing were prepared and demonstrated to detect prostate specific antigen (PSA) with the sensitivity required in molecular and clinical diagnostics.

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