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Title: Detecting hydrogen sulfide by using transparent polymer with embedded CdSe/CdS quantum dots
Authors: Xu, H. 
Wu, J.
Chen, C.-H. 
Zhang, L.
Yang, K.-L. 
Keywords: CdSe/CdS quantum dots
Fluorescent sensor
Hydrogen sulfide
Issue Date: 7-Jan-2010
Citation: Xu, H., Wu, J., Chen, C.-H., Zhang, L., Yang, K.-L. (2010-01-07). Detecting hydrogen sulfide by using transparent polymer with embedded CdSe/CdS quantum dots. Sensors and Actuators, B: Chemical 143 (2) : 535-538. ScholarBank@NUS Repository.
Abstract: 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. © 2009 Elsevier B.V. All rights reserved.
Source Title: Sensors and Actuators, B: Chemical
ISSN: 09254005
DOI: 10.1016/j.snb.2009.09.049
Appears in Collections:Staff Publications

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