scholarly journals Label-free Electrochemical Sensor for MicroRNA Detection based on a Gold Nanoparticles@Poly(methylene blue)-Modified Electrode and a Target Cyclic Amplification Strategy

2020 ◽  
pp. 4631-4639
Author(s):  
Weiwei Wang ◽  
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Modified Electrode ◽  
Label Free ◽  
Microrna Detection ◽  
Amplification Strategy

Fabrication of a quinone containing layer on gold nanoparticles directed to a label-free and reagentless electrochemical miRNA sensor

2017 ◽  
Vol 9 (18) ◽  
pp. 2696-2702 ◽  
Author(s):  
Hoang Vinh Tran ◽  
Nghia Duc Nguyen ◽  
Benoit Piro ◽  
Luyen Thi Tran
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Glassy Carbon ◽  
Self Assembly ◽  
Electrochemical Method ◽  
Carbon Electrodes ◽  
Label Free ◽  
Glassy Carbon Electrodes ◽  
Microrna Detection

In this work, we report a simple electrochemical method to fabricate a label-free and reagentless electrochemical sensor for microRNA detection based on self-assembly of a multifunctional layer on gold nanoparticles-modified glassy carbon electrodes (AuNPs/GCEs).

A highly sensitive electrochemical microRNA-21 biosensor based on intercalating methylene blue signal amplification and a highly dispersed gold nanoparticles/graphene/polypyrrole composite

The Analyst ◽  
2021 ◽  
Vol 146 (8) ◽  
pp. 2679-2688
Author(s):  
Chammari Pothipor ◽  
Noppadol Aroonyadet ◽  
Suwussa Bamrungsap ◽  
Jaroon Jakmunee ◽  
Kontad Ounnunkad
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Signal Amplification ◽  
Electrochemical Biosensor ◽  
Highly Sensitive ◽  
Highly Dispersed ◽  
Polypyrrole Composite ◽  
Amplification Strategy ◽  
Dispersed Gold ◽  
Potential Tool

An ultrasensitive electrochemical biosensor based on a gold nanoparticles/graphene/polypyrrole composite modified electrode and a signal amplification strategy employing methylene blue is developed as a potential tool for the detection of miRNA-21.

Enhanced electrochemical sensing of dopamine in the presence of AA and UA using a curcumin functionalized gold nanoparticle modified electrode

2019 ◽  
Vol 43 (48) ◽  
pp. 19003-19013 ◽  
Author(s):  
K. Krishna Kumar ◽  
M. Devendiran ◽  
R. A. Kalaivani ◽  
S. Sriman Narayanan
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Electrochemical Sensing

In the present study, a electrochemical sensor for the determination of dopamine was developed with green synthesised gold nanoparticles using curcumin as a reducing and, functionalizing agent.

scholarly journals Sensor Based on a Poly[2-(Dimethylamino)ethyl Methacrylate-Co-Styrene], Gold Nanoparticles, and Methylene Blue-Modified Glassy Carbon Electrode for Melamine Detection

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2850
Author(s):  
Fairouz Aberkane ◽  
Imene Abdou ◽  
Nadia Zine ◽  
Nicole Jaffrezic-Renault ◽  
Abdelhamid Elaissari ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Impedance Spectroscopy ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Electrochemical Impedance ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Detection Range

Melamine has been used as a non-protein nitrogenous additive in food products to artificially increase the apparent “false” protein content. Melamine is known as a dangerous and poisonous substance for human health and it causes diverse diseases. An electrochemical sensor for melamine detection has been developed by modification of a glassy carbon electrode using copolymer poly[DMAEMA-co-styrene], gold nanoparticles, and methylene blue. The characterization of the modified electrode was conducted using several analysis techniques including cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The electrochemical detection of melamine was performed by impedance spectroscopy. Obtained results revealed that the developed sensor has a large detection range from 5.0 × 10−13 to 3.8 × 10−8 M with a low detection limit of 1.8 × 10−12 M (at S/N = 3). Various interfering species such as phenol, hydroquinone, and bisphenol A have been used and their behavior on modified electrode has been studied.

scholarly journals Reagentless and sensitive determination of carcinoembryonic antigen based on a stable Prussian blue modified electrode

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38316-38322
Author(s):  
Jing Lin ◽  
Kunyin Li ◽  
Meifang Wang ◽  
Xiaohong Chen ◽  
Jiyang Liu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Carcinoembryonic Antigen ◽  
Prussian Blue ◽  
Modified Electrode ◽  
Sensitive Detection ◽  
Label Free ◽  
Sensitive Determination

A label-free electrochemical sensor is easily fabricated based on stable and surface-confined Prussian blue for reagentless and sensitive detection of carcinoembryonic antigen.

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