Long-term stability of Au nanoparticle-anchored porous boron-doped diamond hybrid electrode for enhanced dopamine detection

Mei, Xueru, Wei, Qiuping, Long, Hangyu , Yu, Zhiming, Deng, Zejun, Meng, Lingcong, Wang, Jian, Luo, Jingting, Lin, Cheng-Te, Ma, Li, Zheng, Kuangzhi and Hu, Naixiu (2018) Long-term stability of Au nanoparticle-anchored porous boron-doped diamond hybrid electrode for enhanced dopamine detection. Electrochimica Acta, 271 . pp. 84-91. ISSN 0013-4686

Full content URL: https://doi.org/10.1016/j.electacta.2018.03.133

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Item Type:Article
Item Status:Live Archive

Abstract

A porous boron-doped diamond (pBDD) was made for immobilizing gold nanoparticles on BDD facets by a special process, wherein methods of magnetron sputtering and thermal catalytic treatment were utilized. Au nanoparticles are seated in the pores of pBDD facets and could be more stable during electrochemical tests. This hybrid structure significantly improved the electrochemical properties due to the introduction of Au nanoparticles and pores, which could increase the specific surface area. The cyclic voltammetry oxidation peak current of the Au/pBDD electrode decreased with an average daily loss of 0.02 μA and maintained approximately 90.1% of its initial value after detecting dopamine once per two days for 30 days, showing an excellent long-term electrochemical stability. In addition, the Au/pBDD electrode exhibited excellent sensitivity for the detection of DA, and the limit of detection was 0.06 μM in a linear concentration range of 0.1 μM–1 mM. This work indicates that the Au/pBDD is an appropriate material for detecting DA in a long-term tests.

Keywords:Porous boron-doped diamond, Au nanoparticles, Long-term stability, Dopamine, Electrochemistry
Divisions:College of Science > School of Chemistry
ID Code:47285
Deposited On:12 Nov 2021 17:01

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