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

被引：20
作者：
Qin, Caidie [1 ]
Bai, Xue [1 ]
Zhang, Yue [2 ,3 ]
Gao, Kai [1 ]
机构：
[1] Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China
[2] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Environm Sci & Engn, Chapel Hill, NC 27599 USA
[3] Aerodyne Res Inc, Billerica, MA 01821 USA
来源：
MICROCHIMICA ACTA | 2018年 / 185卷 / 05期
关键词：
Photocalysis; Dopamine; TiO2 nanotube array; Electron-hole pairs seperation; REDUCED GRAPHENE OXIDE; EXPOSED; 001; FACETS; QUANTUM DOTS; SENSOR; TIO2; SURFACE; FIBER; SILICA; ACID; WIRE;
D O I：
10.1007/s00604-018-2788-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
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 mu M dopamine (DA) concentration range and a 16.7 mu M 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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页数：8
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