Directional surface plasmon-coupled emission of CdTe quantum dots and its application in Hg(II) sensing

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	Directional surface plasmon-coupled emission of CdTe quantum dots and its application in Hg(II) sensing
	Liu, Xiao-Qing ; Liu, Qian ; Cao, Shuo-Hui ; Cai, Wei-Peng ; Weng, Yu-Hua ; Xie, Kai-Xin ; Li, Yao-Qun ; Li YQ(李耀群)
刊名	http://dx.doi.org/10.1039/c2ay25541c
	2012
关键词	MEMBRANE-PROTEIN SYSTEMS WHOLE-BLOOD RESONANCE SPECTROSCOPY BIOPHYSICAL PROPERTIES AQUEOUS SYNTHESIS NANOCRYSTALS LUMINESCENCE SENSITIVITY PROBES FILMS
英文摘要	National Natural Science Foundation of China [21127005, 20975084]; Ph.D. Programs Foundation of the Ministry of Education of China [20110121110011]; We investigated the surface plasmon-coupled emission (SPCE) of CdTe quantum dots (QDs) and developed an SPCE-based quenchometric sensor for Hg(II) ion sensing. CdTe QDs directly synthesized in aqueous solution were attached to a 50 nm-thick Au film through layer-by-layer assembly. The directional emission of the CdTe QDs on the prism side from the surface plasmon coupling was completely p-polarized and observed at a fixed angle of 48.5 degrees, which was consistent with theoretical calculations. An SPCE-based quenchometric sensor for Hg(II) ion sensing was established based on the quenching effect of Hg(II) ions on the fluorescence emission of CdTe QDs. As expected, the SPCE-based sensor enlarged the response range and was more sensitive than that based on free-space detection as a result of the high light-collection efficiency of SPCE. QDs with excellent properties combined with SPCE technology have great potential in detecting analytes at low concentration levels.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/62229]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Liu, Xiao-Qing,Liu, Qian,Cao, Shuo-Hui,et al. Directional surface plasmon-coupled emission of CdTe quantum dots and its application in Hg(II) sensing[J]. http://dx.doi.org/10.1039/c2ay25541c,2012.
APA	Liu, Xiao-Qing.,Liu, Qian.,Cao, Shuo-Hui.,Cai, Wei-Peng.,Weng, Yu-Hua.,...&李耀群.(2012).Directional surface plasmon-coupled emission of CdTe quantum dots and its application in Hg(II) sensing.http://dx.doi.org/10.1039/c2ay25541c.
MLA	Liu, Xiao-Qing,et al."Directional surface plasmon-coupled emission of CdTe quantum dots and its application in Hg(II) sensing".http://dx.doi.org/10.1039/c2ay25541c (2012).