Au nanospheres modified boron-doped diamond microelectrode grown via hydrogen plasma etching solid doping source for dopamine detection

• 作者: Kaili Yao Xiaojun Tan Bing Dai Jie Bai Qiaoyang Sun Wenxin Cao Jiwen Zhao Lei Yang Jiecai Han Jiaqi Zhu
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（14）
• 页码范围: 42-46
• 页数: 5页
• 语种: 英文

摘要

Boron doped diamond (BDD) electrode is a promising electrochemical material for detecting dopamine level in the human's body.In this work,we developed a new doping source-graphite and solid boron oxide powders to synthesize BDD film with microwave plasma chemical vapor deposition,so as to avoid using toxic or corrosive dopants,such as boroethane and trimethylborate.The synthesized BDD film is pinhole free and with high doping density of 8.44 × 1020 cm-3 calculated from the Raman spectroscopy.Subsequently,Au nanospheres were decorated on the surface of BDD film to improve electrochemical performance of the BDD film.The Au nanoparticles modified BDD electrode demonstrates an excellent electrochemical response,a high sensitivity (in the range of 5 μM-1 mM),and a low detection limit (～0.8 μM) for detecting dopamine.