S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
Award Criteria
Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Electrochemical Sensor Based on Electroactive Polymer and Sulfo-group-functionalized Graphene Oxide Composite for Detection of Dopamine [PDF]

Ning Li, Hiroaki Sakamoto, Eiichiro Takamura, Haitao Zheng, and Shin-ichiro Suye

(Received May 20, 2021; Accepted July 19, 2021)

Keywords: electroactive polymerized mediator, functionalized graphene oxide, self-assembly, dopamine

A novel dopamine (DA) sensor based on a polymerized mediator (PEI-Fc) and sulfo-group-functionalized graphene oxide (PEI-Fc/SFGO) composite modified electrode was developed. The PEI-Fc/SFGO composite was formed by electrostatic interaction, in which ferrocene (Fc) groups served as an electron transfer mediator to improve the sensitivity. Scanning electron microscopy (SEM) was employed to characterize the surface morphology of the PEI-Fc/SFGO composite. Ultraviolet visible spectroscopy (UV–vis) and Fourier transform infrared (FTIR) spectroscopy were performed to characterize the PEI-Fc and SFGO, respectively. Cyclic voltammetry (CV) was employed to investigate the electrochemical behavior of the PEI-Fc/SFGO composite modified electrode. Linear sweep voltammetry (LSV) was employed for the quantitative detection of DA. The as-prepared sensor realized a wide linear range of 0.5–100 μM with a low limit of detection (LOD) of 0.1 μM for the determination of DA. This work provides a simple surface modification technique and a potential electrode material for the detection of DA.

Corresponding author: Hiroaki Sakamoto

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