Comparative investigation of energy relaxation dynamics of gold nanoparticles and gold-polypyrrole encapsulated nanoparticles

被引：55
|
作者：
Shin, HJ
Hwang, IW
Hwang, YN
Kim, D [1 ]
Han, SH
Lee, JS
Cho, GJ
机构：
[1] Yonsei Univ, Natl Creat Res Initiat Ctr Ultrafast Opt Characte, Seoul 120749, South Korea
[2] Yonsei Univ, Dept Chem, Seoul 120749, South Korea
[3] Kwangju Inst Sci & Technol, Dept Mat & Engn, Kwangju 500712, South Korea
[4] Sunchon Natl Univ, Dept Chem Engn, Sunchon 540742, Chonnam, South Korea
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 20期
关键词：
D O I：
10.1021/jp022055o
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report the femtosecond transient absorption dynamics of the gold and gold-polypyrrole nanoparticles by photoexcitation at various wavelengths. The bleach recovery dynamics of the surface plasmon band for the gold and gold-polypyrrole nanoparticles exhibit different responses to the pump beam energy and intensity in thermal energy transfer from the gold nanoparticles to the surrounding medium or embedding material. This indicates that directly attached polypyrroles provide fast thermal energy transfer pathways for the core gold nanoparticles.
引用
收藏
页码：4699 / 4704
页数：6
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