Self-Assembly Films on a Screen-Printed Carbon Electrode

2013 ◽  
Vol 341-342 ◽  
pp. 307-310
Author(s):  
Yu Fang Sha ◽  
Hong Jun Lan ◽  
Yan Zhang ◽  
Shou Shuo Liu ◽  
Jun Xie
Keyword(s):  
Photoelectron Spectroscopy ◽  
Self Assembly ◽  
Multiwall Carbon Nanotubes ◽  
Multilayer Films ◽  
Carbon Electrode ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Screen Printed Carbon Electrode ◽  
Multiwall Carbon ◽  
Screen Printed

Using layer-by-layer (LBL) assembled method, multilayer films containing multiwall carbon nanotubes (MWNTs) and redox polymer were successfully fabricated on a screen-printed carbon electrode. X-ray photoelectron spectroscopy (XPS) and field-emission scanning electron microscopy (FE-SEM) were used to characterize the assembled multilayer films.

Biological Multilayer Films Assembled by Redox Polymer and HRP on Screen-Printed Carbon Electrode

2012 ◽  
Vol 571 ◽  
pp. 56-59
Author(s):  
Yu Fang Sha ◽  
Mei Zhao ◽  
Ming Quan Yang ◽  
Hai Xin Bai ◽  
Man Zhao
Keyword(s):  
Horseradish Peroxidase ◽  
Electrostatic Interaction ◽  
Electrode Surface ◽  
Multilayer Films ◽  
Carbon Electrode ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Screen Printed Carbon Electrode ◽  
Positively Charged ◽  
Screen Printed

Biological multilayer films of redox polymer and horseradish peroxidase (HRP) were successfully assembled on a screen-printed carbon electrode using layer-by-layer (LBL) assembled method based on the electrostatic interaction. The screen-printed carbon electrode surface was modified by the positively charged redox polymer, and the negatively charged HRP by LBL method.

Electrochemical Activity of Multilayer Films of Carbon Nanotubes and Redox Polymer

2013 ◽  
Vol 341-342 ◽  
pp. 221-224
Author(s):  
Yu Fang Sha ◽  
Yan Chun Hu ◽  
De Xiang Sun ◽  
Yong Sheng Guo ◽  
Bing Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Method ◽  
Multilayer Films ◽  
Electrochemical Activity ◽  
Carbon Electrode ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Screen Printed Carbon Electrode ◽  
Vis Spectroscopy ◽  
Screen Printed

Multilayer films containing carbon nanotubes and redox polymer were successfully fabricated on a screen-printed carbon electrode using layer-by-layer (LBL) assembled method. UV-vis spectroscopy and electrochemical method were used to characterize the assembled multilayer films.

A Simple and Rapid Electrochemical Method for Determination of Ascorbic Acid

2013 ◽  
Vol 341-342 ◽  
pp. 866-869 ◽  
Author(s):  
Yu Fang Sha ◽  
Mei Zhao ◽  
Fei Guo ◽  
Man Zhao ◽  
Ming Quan Yang
Keyword(s):  
Ascorbic Acid ◽  
Electrochemical Method ◽  
Multiwall Carbon Nanotubes ◽  
Carbon Electrode ◽  
Redox Polymer ◽  
Real Samples ◽  
Screen Printed Carbon Electrode ◽  
Response Current ◽  
Multiwall Carbon

This paper introduced a simple and rapid electrochemical method for determination of ascorbic acid (AA). A screen-printed carbon electrode modified by multilayer films containing multiwall carbon nanotubes (MWNTs) and redox polymer. The modified electrode exhibited good stability and high electrocatalytic activity towards AA in the presence of uric acid and dopamine even in the real samples. The response current revealed a good linear relationship with the concentration of AA in the range of 5×10-7M~7×10-5M and the detection limit was 3×10-7M.

A Biosensor for Sandwich Immunoassay by Electrodepositing Redox Polymer on Screen-Printed Carbon Electrode

2012 ◽  
Vol 571 ◽  
pp. 538-541
Author(s):  
Yu Fang Sha ◽  
Mei Zhao ◽  
Fei Guo ◽  
Jun Xie ◽  
Wei Han
Keyword(s):  
Enzyme Immunoassay ◽  
Electrode Surface ◽  
Sandwich Immunoassay ◽  
Carbon Electrode ◽  
Redox Polymer ◽  
Sandwich Complex ◽  
Screen Printed Carbon Electrode ◽  
Sandwich Enzyme Immunoassay ◽  
Screen Printed

Improvement of sensitivity of electrochemical sandwich enzyme immunoassay has been achieved by electrodepositing redox polymer on screen-printed carbon electrode surface, on which sandwich complex were formed.

scholarly journals Synthesis and Introducing Au-Cu Alloy Nanoparticles/Porous Silicon as a Novel Modifier of Screen Printed Carbon Electrode in Simultaneous Electrocatalytic Detection of Codeine and Acetaminophen

2022 ◽  
Author(s):  
Farzad Allahnouri ◽  
Khalil Farhadi ◽  
Hamideh Imanzadeh ◽  
Rahim Molaei ◽  
Habibollah Eskandari
Keyword(s):  
Porous Silicon ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
High Surface Area ◽  
Galvanic Replacement ◽  
Human Blood Plasma ◽  
Carbon Electrode ◽  
X Ray ◽  
Screen Printed Carbon Electrode ◽  
Screen Printed

Abstract In the present study, a bimetallic nanostructure of gold-copper (Au-CuNPs) was decorated on the surface of porous silicon (PSi) using an easy galvanic replacement reaction between metal ions and PSi in the presence of 0.1 M hydrofluoric acid solution. The morphology and structures of the Au-CuNPs@PSi nanocomposite were characterized using X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) energy-dispersive X-ray spectroscopy (EDX) and cyclic voltammetry (CV) techniques. Then, prepared nanocomposite was used as a modifier in screen-printed carbon electrode (SPCE) for the highly sensitive simultaneous determination of codeine (COD) and acetaminophen (ACE). The combination of PSi and metals nanoparticles provide a porous and high surface area with excellent electrical conductivity which leads to reduce the peak potentials and enhance the oxidation peak currents of COD and ACE at the surface of the Au-CuNPs@PSi/SPCE nanosensor. The dynamic linear ranges were obtained from 0.06 to 0.6 µM for both COD and ACE and the detection limits (3.0 S/N) estimated 0.35 µM for COD and 0.30 µM for ACE, respectively. Moreover, recovery tests were carried out in real samples such as urine, human blood plasma, and tablets.

Uric Acid Sensor Based on PEDOT:PSS Modified Screen-Printed Carbon Electrode Fabricated with a Simple Painting Technique

2021 ◽  
Vol 24 (2) ◽  
pp. 43-50
Author(s):  
Wulan Tri Wahyuni ◽  
Rudi Heryanto ◽  
Eti Rohaeti ◽  
Achmad Fauzi ◽  
Budi Riza Putra
Keyword(s):  
Uric Acid ◽  
Electrochemical Sensors ◽  
Limit Of Detection ◽  
Electrochemical Measurement ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Layer By Layer ◽  
Screen Printed Carbon Electrode ◽  
Limit Of Quantitation ◽  
Screen Printed

A screen-printed carbon electrode is a suitable electrode for electrochemical sensors due to its simplicity and portability. This study aimed to fabricate a screen-printed carbon electrode modified with poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (SPCE-PEDOT:PSS) to improve the electrochemical performance for uric acid detection. The SPCE was fabricated using a layer-by-layer painting process of conductive ink consisting of graphite as a conductive material, polystyrene as a polymeric binder, and dichloromethane solvent on a polyvinyl chloride paper substrate. The fabricated SPCE was then modified with PEDOT:PSS by a drop-casting method. The characterization of SPCE-PEDOT:PSS surface morphology was performed using the scanning electron microscopy technique. The SPCE-PEDOT:PSS provided an acceptable linearity (R2 = 0.9985, 0.9993, 0.9985), sensitivity (0.070, 0.015, 0.024 µA/µM), precision (%RSD = 2.70%, 2.89%, 2.40%), limit of detection (1.61 µM, 1.14 µM, 1.62 µM), and limit of quantitation (5.37 µM, 3.81 µM to 5.39 µM) in measurement of uric acid standard solution using cyclic voltammetry, amperometry, and differential pulse voltammetry techniques, respectively. The studies using SPCE-PEDOT:PSS indicated that the electrode could be applied in the electrochemical measurement of uric acid in the human urine sample.

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