Photoelectrochemical CdSe/TiO2 nanotube array microsensor for high-resolution in-situ detection of dopamine

被引：0
|
作者：
Caidie Qin
Xue Bai
Yue Zhang
Kai Gao
机构：
[1] Hohai University,Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment
[2] University of North Carolina,Department of Environmental Science and Engineering, Gillings School of Global Public Health
[3] Aerodyne Research Inc.,undefined
来源：
Microchimica Acta | 2018年 / 185卷
关键词：
Photocalysis; Dopamine; TiO; nanotube array; Electron-hole pairs seperation;
D O I：
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中图分类号：
学科分类号：
摘要：
A photoelectrochemical wire microelectrode was constructed based on the use of a TiO2 nanotube array with electrochemically deposited CdSe semiconductor. A strongly amplified photocurrent is generated on the sensor surface. The microsensor has a response in the 0.05–20 μM dopamine (DA) concentration range and a 16.7 μM detection limit at a signal-to-noise ratio of 3. Sensitivity, recovery and reproducibility of the sensor were validated by detecting DA in spiked human urine, and satisfactory results were obtained.
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