Detecting hydrogen sulfide by using transparent polymer with embedded CdSe/CdS quantum dots

被引：26

作者：

Xu, Huan ^{[1
]}

Wu, Ji'en ^{[2
]}

Chen, Chih-Hsin ^{[1
]}

Zhang, Lianhui ^{[2
]}

Yang, Kun-Lin ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

[2] Inst Mol & Cell Biol, Singapore 138673, Singapore

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 143卷 / 02期

关键词：

Fluorescent sensor; CdSe/CdS quantum dots; Polymer; Hydrogen sulfide; Poly(dimethylsiloxane); CORE/SHELL NANOCRYSTALS; SEMICONDUCTOR NANOCRYSTALS; HIGHLY LUMINESCENT; PHOTOLUMINESCENCE; GROWTH; GASES; PROBE;

D O I：

10.1016/j.snb.2009.09.049

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hydrogen sulfide (H2S) is a hazardous vapor commonly found in oil fields and industrial processes. In this paper, we first reported the fluorescence quenching of CdSe/CdS quantum dots (QDs) by hydrogen sulfide in dichloromethane. This response is highly specific because no response to other volatile organic vapors can be observed. Second, we embedded QDs in films of poly(dimethylsiloxane) (PDMS). a transparent and gas-permeable polymer, for detecting low level of hydrogen Sulfide. After exposing the film to 10 ppm of hydrogen sulfide, the film loses its fluorescence within 1 min. However, the fluorescence recovers completely after the film is left in the open air for 2 h. Compared with other types of hydrogen sulfide sensors, the film sensor with embedded QDs is more portable, easy-to-operate and has low-cost. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：535 / 538

页数：4

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