Study of fluorescence enhancement of colloidal CdSe/ZnS quantum dots bound to hexadecylamine by single-molecule measurements

Chi Tsu Yuan; Wu Ching Chou; Yueh Nan Chen; Jui Wen Chou; Der San Chuu; Cheng An J. Lin; Jimmy K. Li; Walter H. Chang; Ji Lin Shen

doi:10.1021/jp074561p

Study of fluorescence enhancement of colloidal CdSe/ZnS quantum dots bound to hexadecylamine by single-molecule measurements

Chi Tsu Yuan, Wu Ching Chou, Yueh Nan Chen, Jui Wen Chou, Der San Chuu, Cheng An J. Lin, Jimmy K. Li, Walter H. Chang, Ji Lin Shen

物理學系

研究成果: Article › 同行評審

24 引文斯高帕斯（Scopus）

摘要

Fluorescence enhancement of colloidal CdSe/ZnS quantum dots (QDs) by the binding of hexadecylamine (HDA) ligands was investigated at the single-QD level. The blinking behavior of individual CdSe/ZnS QDs can be dramatically modified by additional HDA ligands. Both the ratio of the mean on/off time lengths and the total number of emitted photons within the on-time duration can be enhanced, by factors of up to 2.8 and 13, respectively. Consequently, the blinking rate can be suppressed down to 18%. The fluorescence decay curve is closer to a single-exponential decay profile and has a longer measured lifetime. These results suggest that HDA ligands can further improve surface passivation.

原文	English
頁（從 - 到）	15166-15172
頁數	7
期刊	Journal of Physical Chemistry C
卷	111
發行號	42
DOIs	https://doi.org/10.1021/jp074561p
出版狀態	Published - 2007 10月 25

All Science Journal Classification (ASJC) codes

電子、光磁材料
能源(全部)
物理與理論化學
表面、塗料和薄膜

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10.1021/jp074561p

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title = "Study of fluorescence enhancement of colloidal CdSe/ZnS quantum dots bound to hexadecylamine by single-molecule measurements",

abstract = "Fluorescence enhancement of colloidal CdSe/ZnS quantum dots (QDs) by the binding of hexadecylamine (HDA) ligands was investigated at the single-QD level. The blinking behavior of individual CdSe/ZnS QDs can be dramatically modified by additional HDA ligands. Both the ratio of the mean on/off time lengths and the total number of emitted photons within the on-time duration can be enhanced, by factors of up to 2.8 and 13, respectively. Consequently, the blinking rate can be suppressed down to 18%. The fluorescence decay curve is closer to a single-exponential decay profile and has a longer measured lifetime. These results suggest that HDA ligands can further improve surface passivation.",

author = "Yuan, {Chi Tsu} and Chou, {Wu Ching} and Chen, {Yueh Nan} and Chou, {Jui Wen} and Chuu, {Der San} and Lin, {Cheng An J.} and Li, {Jimmy K.} and Chang, {Walter H.} and Shen, {Ji Lin}",

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doi = "10.1021/jp074561p",

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T1 - Study of fluorescence enhancement of colloidal CdSe/ZnS quantum dots bound to hexadecylamine by single-molecule measurements

AU - Yuan, Chi Tsu

AU - Chou, Wu Ching

AU - Chen, Yueh Nan

AU - Chou, Jui Wen

AU - Chuu, Der San

AU - Lin, Cheng An J.

AU - Li, Jimmy K.

AU - Chang, Walter H.

AU - Shen, Ji Lin

PY - 2007/10/25

Y1 - 2007/10/25

N2 - Fluorescence enhancement of colloidal CdSe/ZnS quantum dots (QDs) by the binding of hexadecylamine (HDA) ligands was investigated at the single-QD level. The blinking behavior of individual CdSe/ZnS QDs can be dramatically modified by additional HDA ligands. Both the ratio of the mean on/off time lengths and the total number of emitted photons within the on-time duration can be enhanced, by factors of up to 2.8 and 13, respectively. Consequently, the blinking rate can be suppressed down to 18%. The fluorescence decay curve is closer to a single-exponential decay profile and has a longer measured lifetime. These results suggest that HDA ligands can further improve surface passivation.

AB - Fluorescence enhancement of colloidal CdSe/ZnS quantum dots (QDs) by the binding of hexadecylamine (HDA) ligands was investigated at the single-QD level. The blinking behavior of individual CdSe/ZnS QDs can be dramatically modified by additional HDA ligands. Both the ratio of the mean on/off time lengths and the total number of emitted photons within the on-time duration can be enhanced, by factors of up to 2.8 and 13, respectively. Consequently, the blinking rate can be suppressed down to 18%. The fluorescence decay curve is closer to a single-exponential decay profile and has a longer measured lifetime. These results suggest that HDA ligands can further improve surface passivation.

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 42

ER -

Study of fluorescence enhancement of colloidal CdSe/ZnS quantum dots bound to hexadecylamine by single-molecule measurements

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