Facile synthesis of a nanorod-like MoS2 nanostructure for sensitive electrochemical biosensing application

The Analyst ◽  
2020 ◽  
Vol 145 (24) ◽  
pp. 7864-7869
Author(s):  
Zhongfang Hu ◽  
Rong Xu ◽  
Suhua Yu ◽  
Juan Li ◽  
Zhanjun Yang
Keyword(s):  
Glucose Oxidase ◽  
Electrode Material ◽  
Electrochemical Sensing ◽  
Facile Synthesis ◽  
Step Method ◽  
Semiconductor Nanostructure ◽  
Electrochemical Biosensing ◽  
Sensing Application

A novel nanorod-like MoS2 semiconductor nanostructure was synthesized through a simple two-step method, and was then exploited as an electrode material to immobilize glucose oxidase (GOx) and for use in electrochemical sensing application.

Biocompatible peptide hydrogels with excellent antibacterial and catalytic properties for electrochemical sensing application

2021 ◽  
Vol 1154 ◽  
pp. 338295
Author(s):  
Wenqi Wang ◽  
Rui Han ◽  
Kai Tang ◽  
Shuju Zhao ◽  
Caifeng Ding ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Electrochemical Sensing ◽  
Sensing Application ◽  
Peptide Hydrogels

scholarly journals Paper-Based Competitive Immunochromatography Coupled with an Enzyme-Modified Electrode to Enable the Wireless Monitoring and Electrochemical Sensing of Cotinine in Urine

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1659
Author(s):  
Nutcha Larpant ◽  
Pramod K. Kalambate ◽  
Tautgirdas Ruzgas ◽  
Wanida Laiwattanapaisal
Keyword(s):  
Glucose Oxidase ◽  
Modified Electrode ◽  
Near Field ◽  
Electrochemical Measurement ◽  
Electrochemical Sensing ◽  
Urine Samples ◽  
Lateral Flow Strip ◽  
Wireless Monitoring ◽  
Sensing Platform ◽  
Combined Strategy

This paper proposes a combined strategy of using paper-based competitive immunochromatography and a near field communication (NFC) tag for wireless cotinine determination. The glucose oxidase labeled cotinine antibody specifically binds free cotinine in a sample, whereas the unoccupied antibody attached to BSA-cotinine at the test line on a lateral flow strip. The glucose oxidase on the strip and an assistant pad in the presence of glucose generated H2O2 and imposed the Ag oxidation on the modified electrode. This enabled monitoring of immunoreaction by either electrochemical measurement or wireless detection. Wireless sensing was realized for cotinine in the range of 100–1000 ng/mL (R2 = 0.96) in PBS medium. Undiluted urine samples from non-smokers exhibited an Ag-oxidation rate three times higher than the smoker’s urine samples. For 1:8 diluted urine samples (smokers), the proposed paper-based competitive immunochromatography coupled with an enzyme-modified electrode differentiated positive and negative samples and exhibited cotinine discrimination at levels higher than 12 ng/mL. This novel sensing platform can potentially be combined with a smartphone as a reader unit.

Facile synthesis, characterize, mechanism and enhanced visible-light photocatalytic of SiW12/α-Fe2O3 nanocomposite

2021 ◽  
Author(s):  
Haihui Yu ◽  
Bing Wei ◽  
Junping Wang ◽  
Sai Zeng ◽  
Haiqi Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Facile Synthesis ◽  
Step Method ◽  
Visible Light Photocatalytic

A novel type of photocatalyst SiW12/α-Fe2O3 created by combining SiW12 NPs and α-Fe2O3 nanorings was synthesized through “step to step” method. The structure, composition, morphology and the interaction between SiW12...

scholarly journals Utilising Commercially Fabricated Printed Circuit Boards as an Electrochemical Biosensing Platform

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 793
Author(s):  
Uroš Zupančič ◽  
Joshua Rainbow ◽  
Pedro Estrela ◽  
Despina Moschou
Keyword(s):  
Printed Circuit Boards ◽  
Electrochemical Sensors ◽  
Cost Effective ◽  
Electrochemical Sensing ◽  
Label Free ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Sensing Applications ◽  
Electrochemical Biosensing ◽  
Pre Treatment

Printed circuit boards (PCBs) offer a promising platform for the development of electronics-assisted biomedical diagnostic sensors and microsystems. The long-standing industrial basis offers distinctive advantages for cost-effective, reproducible, and easily integrated sample-in-answer-out diagnostic microsystems. Nonetheless, the commercial techniques used in the fabrication of PCBs produce various contaminants potentially degrading severely their stability and repeatability in electrochemical sensing applications. Herein, we analyse for the first time such critical technological considerations, allowing the exploitation of commercial PCB platforms as reliable electrochemical sensing platforms. The presented electrochemical and physical characterisation data reveal clear evidence of both organic and inorganic sensing electrode surface contaminants, which can be removed using various pre-cleaning techniques. We demonstrate that, following such pre-treatment rules, PCB-based electrodes can be reliably fabricated for sensitive electrochemical biosensors. Herein, we demonstrate the applicability of the methodology both for labelled protein (procalcitonin) and label-free nucleic acid (E. coli-specific DNA) biomarker quantification, with observed limits of detection (LoD) of 2 pM and 110 pM, respectively. The proposed optimisation of surface pre-treatment is critical in the development of robust and sensitive PCB-based electrochemical sensors for both clinical and environmental diagnostics and monitoring applications.

Heterogemini surfactant assisted synthesis of monodisperse icosahedral gold nanocrystals and their applications in electrochemical biosensing

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31301-31307 ◽  
Author(s):  
Liming Chen ◽  
Anirban Dandapat ◽  
Youju Huang ◽  
Liping Song ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Performance ◽  
Electrochemical Sensing ◽  
Gold Nanocrystals ◽  
Plasmonic Property ◽  
Electrochemical Biosensing ◽  
Surfactant Assisted

Monodisperse icosahedral gold nanoparticles with tunable plasmonic property and high performance electrochemical sensing was synthesized by a heterogemini surfactant.

Ternary Hybrid γ-Fe2O3/CrVI/Amine Oxidase Nanostructure for Electrochemical Sensing: Application for Polyamine Detection in Tumor Tissue

2016 ◽  
Vol 22 (20) ◽  
pp. 6846-6852 ◽  
Author(s):  
Emanuela Bonaiuto ◽  
Massimiliano Magro ◽  
Davide Baratella ◽  
Petr Jakubec ◽  
Elisabetta Sconcerle ◽  
...  
Keyword(s):  
Tumor Tissue ◽  
Amine Oxidase ◽  
Electrochemical Sensing ◽  
Sensing Application

A facile synthesis of novel polyaniline/graphene nanocomposite thin films for enzyme-free electrochemical sensing of hydrogen peroxide

2021 ◽  
Author(s):  
Swati Verma ◽  
Dipendra Singh Mal ◽  
Paulo R. Oliveira ◽  
Bruno Campos Janegitz ◽  
Jai Prakash ◽  
...  
Keyword(s):  
Thin Films ◽  
Hydrogen Peroxide ◽  
Small Molecules ◽  
Present Article ◽  
Electrochemical Method ◽  
Electrochemical Sensing ◽  
Facile Synthesis ◽  
Nanocomposite Thin Films ◽  
Graphene Nanocomposite

Electrochemical method is the most effective, facile, and economical approach for the detection of small molecules. The present article deals with design and engineering of polymer-graphene based thin films through...

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