Photoelectrochemical detection of pentachlorophenol with a Multiple Hybrid CdSexTe1-x/TiO2 Nanotube Structure-Based Label-Free Immunosensor

被引：173

作者：

Kang, Qing ^{[1
]}

Yang, Lixia ^{[1
,2
]}

Chen, Yufang ^{[1
]}

Luo, Shenglian ^{[1
,2
]}

Wen, Lingfei ^{[1
]}

Cai, Qingyun ^{[1
]}

Yao, Shouzhuo ^{[1
]}

机构：

[1] Hunan Univ, Dept Chem, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China

[2] Nanchang Hangkong Univ, Sch Environm & Chem Engn, Nanchang 330063, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2010年 / 82卷 / 23期

基金：

美国国家科学基金会;

关键词：

QUANTUM DOTS; ARRAYS; CDSE; ACID; CDTE; DNA;

D O I：

10.1021/ac101798t

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Driven by the urgent demand of detecting trace amounts of pentachlorophenol (PCP) in contaminative water, a label-free immunosensor with ultra sensitivity and high selectivity was constructed based on a hybrid CdSexTe1-x. (0 x 1) nanocrystal (NCs)-modified TiO2 nanotube (NT) arrays for the first time The CdSexTe1-x NCs were photoelectrodeposited on inner and outer space of the TiO2 NTs, leading to high photoelectrical conversion efficiency in the visible region PCP antibodies are covalently conjugated on the TiO2 NTs due to the large surface area and good biocompatibility Since the photocurrent is highly dependent on the TiO2 surface properties, the specific interaction between PCP and the antibodies results in a sensitive change in the photocurrent, with a limit of detection (LOD) of 1 pM High sensor-to-sensor reproducibility is achieved The sensor was applied for the direct analysis of river water samples

引用

页码：9749 / 9754

页数：6

共 40 条

[1] Alloyed semiconductor quantum dots: Tuning the optical properties without changing the particle size [J].