Metal enhanced photoluminescence of near-infrared CdTe_xSe_{1鈭?span style='font-style: italic'>x} quantum dots

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• 作者：Ling Liu ; Xiaoliang Xu ; ^{xlxu@ustc.edu.cn} ; Tian Luo ; Yansong Liu ; Zhou Yang ; Jiemei Lei
• 关键词：A. Near-infrared quantum dots ; A. Au nanoparticles ; D. Photoluminescence enhancement
• 刊名：Solid State Communications
• 出版年：2012
• 期刊代码：101_00381098
• 类别：ms
• 出版时间：July, 2012
• 卷：152
• 期：13
• 页码：1103-1107
• 文件大小：843 K

摘要

High-quality alloyed near-infrared CdTe_xSe_1鈭?em>x quantum dots were synthesized by a modified organometallic method. The emission wavelength of the alloyed quantum dots were turned from visible to near-infrared range by changing the composition of the precursor. The photoluminescence intensity of the alloyed quantum dots was further enhanced by coupling through localized surface plasmons from Au nanoparticles. The alloyed CdTeSe quantum dots coupled with Au nanoparticles exhibited a 4 times photoluminescence enhancement than that of bare CdTeSe quantum dots by turning the localized surface plasmons resonant absorption of Au nanoparticles consistent to the excitation wavelength. This method will be beneficial for the potential applications in the biological imaging and detection.