Amperometric acetylcholine biosensor based on graphene-PEDOT:PSS modified electrode

2014 ◽  
Author(s):  
Piyawat Pitikultham ◽  
Chakrit Sriprachuabwong ◽  
Pornpimol Sritongkham
Keyword(s):  
Modified Electrode

Highly sensitive NADH detection by utilising an aluminium hydroxide/iron hydroxide/MWCNTs nanocomposite film-modified electrode

2020 ◽  
Vol 15 (14) ◽  
pp. 997-1002
Author(s):  
Yu Wang ◽  
Lingling Yin ◽  
Xia Li ◽  
Ran Shang ◽  
Xiangli Yang ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Aluminium Hydroxide ◽  
Nanocomposite Film ◽  
Iron Hydroxide ◽  
Highly Sensitive

Application of Alizarin/Graphene-Chitosan Modified Electrode on Detection of Human Telomere DNA

2013 ◽  
Vol 41 (4) ◽  
pp. 481
Author(s):  
Yuan-Yuan JIANG ◽  
Kun WANG ◽  
Chong-Zheng XU ◽  
Xiao-Di YANG ◽  
Hui-Hui LI
Keyword(s):  
Modified Electrode ◽  
Human Telomere

Differential Pulse Voltammetric Determination of Piroxicam on Lanthanide Ferric Oxide Nanoparticles-Carbon Paste Modified Electrode

2018 ◽  
Vol 14 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Isaac Yves Lopes de Macedo ◽  
Morgana Fernandes Alecrim ◽  
Luane Ferreira Garcia ◽  
Aparecido Ribeiro de Souza ◽  
Wallans Torres Pio dos Santos ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Ferric Oxide ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Oxide Nanoparticles ◽  
Carbon Paste ◽  
Carbon Paste Modified Electrode

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.

scholarly journals Nanostructured TiO2 and PEDOT Electrodes with Photovoltaic Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 107
Author(s):  
Andrés Mauricio Ramírez ◽  
Linda Cattin ◽  
Jean-Christian Bernède ◽  
Fernando Raúl Díaz ◽  
Manuel Alejandro Gacitúa ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Photovoltaic Cells ◽  
Morphological Characterization ◽  
Transparent Electrodes ◽  
Nanostructured Tio2 ◽  
Photovoltaic Application

In this work, nanostructured TiO2 and poly-3,4-ethylenedioxythiophene (PEDOT) layers were electrochemically prepared over transparent electrodes. Morphological characterization evidenced the presence of nanostructures as planed with 50-nm-wide TiO2 rod formations followed by 30-nm-wide PEDOT wires. Different characterizations were made to the deposits, establishing their composition and optic properties of the deposits. Finally, photovoltaic cells were prepared using this modified electrode, proving that the presence of PEDOT nanowires in the cell achieves almost double the efficiency of its bulk analogue.

Nanostructured Au-graphene modified electrode for electrosensing of chlorzoxazone and its biomedical applications

2021 ◽  
Vol 266 ◽  
pp. 124538
Author(s):  
Manjunath D. Meti ◽  
Jyothi C. Abbar ◽  
Jialiang Lin ◽  
Qingguo Han ◽  
Yuan Zheng ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Biomedical Applications

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

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