Enhanced selectivity of boron doped diamond electrodes for the detection of dopamine and ascorbic acid by increasing the film thickness
Enhanced selectivity of boron doped diamond electrodes for the detection of dopamine and ascorbic acid by increasing the film thickness
复制标题
通过增加膜厚度增强硼掺杂金刚石电极检测多巴胺和抗坏血酸的选择性
DOI：
10.1016/j.apsusc.2016.08.158
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发表时间：
2016-12-30
影响因子：
6.7
通讯作者：
Meng, Lingcong
中科院分区：
文献类型：
--
作者：
Qi, Yao;Long, Hangyu;Meng, Lingcong
采用热丝化学气相沉积法制备了不同厚度的硼掺杂金刚石（BDD）。研究了BDD电极检测多巴胺（DA）和抗坏血酸（AA）的性能。扫描电镜和拉曼光谱显示，随着膜厚的增加，晶粒尺寸增大，膜质量改善。电化学测试表明，[Fe-3 (CN)(6)]（3-/4-）氧化还原体系的传递系数随膜厚的增加而增大。DA与AA混合检测的选择性和灵敏度结果表明，8h-BDD和12h-BDD电极对DA和AA具有良好的选择性分离氧化峰，并且12h-BDD电极在DA浓度降至1 μ m之前具有最佳的灵敏度。
In this paper, boron doped diamond (BDD) with different thickness were prepared by hot filament chemical vapor deposition. The performance of BDD electrodes for detecting dopamine (DA) and ascorbic acid (AA) were investigated. Scanning electron microscopy and Raman spectra reveal the grain size increases and the film quality improves with the increase of film thickness. Electrochemical test show that the transfer coefficient in [Fe-3 (CN) (6)](3-/4-) redox system increases with the increase of the film thickness. The results of selectivity and sensitivity for DA mixed with AA detection show that 8h-BDD and 12h-BDD electrodes possess well selective separated oxidation peaks of DA and AA, and the 12h-BDD electrode exhibits optimal sensitivity until the DA concentration drops to 1 mu M. (C) 2016 Elsevier B.V. All rights reserved.