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Sacrificial template synthesis of ultrathin polyaniline nanosheets and their application in highly sensitive electrochemical dopamine detection

Authors :
Ce Wang
Ming Mu
Sihui Chen
Xiaofeng Lu
Na Song
Source :
Materials Today Chemistry. 20:100479
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

Unique functional nanomaterials as electroactive media for efficiently electrochemical biosensing have always been an ever-increasing topic in biotechnology and environmental fields. In this study, we report a simple sacrificial template-guided polymerization strategy to fabricate ultrathin two-dimensional (2D) polyaniline (PANI) nanosheets for electrochemical detection of dopamine (DA). By using vanadium pentoxide nanosheets as both sacrificial templates and oxidants, the resulting PANI nanosheets show an ultrathin thickness of ca. 4 nm with a favorable electrical conductivity of ca. 10 S cm−1. Furthermore, PANI nanosheets have been modified on a glass carbon electrode for highly sensitive DA detection. The proposed DA sensor delivers a linear range of 0.5–300 μM with a low detection limit of 0.118 μM (S/N = 3). In addition, the as-fabricated electrochemical sensor exhibits an outstanding selectivity, stability, reproducibility, and repeatability, enabling its feasible application for DA detection in real samples. Therefore, the ultrathin PANI nanosheets reported here are good candidates as electrodes for the sensitive and selective DA detection.

Details

ISSN :
24685194
Volume :
20
Database :
OpenAIRE
Journal :
Materials Today Chemistry
Accession number :
edsair.doi...........b5dd7b4090fb6fb6754ff2cf97bca39f
Full Text :
https://doi.org/10.1016/j.mtchem.2021.100479