Ultrafast Dynamics of Photoexcited Gold Nanostructures on Mica Substrates Probed by Transient Absorption Spectroscopy and Time-resolved X-ray Diffraction

被引：0

作者：

Sotome, Hikaru ^{[1
]}

Azuma, Yosuke ^{[1
]}

Asami, Sho ^{[1
]}

Matsushima, Shin-ichi ^{[1
]}

Kajimoto, Shinji ^{[1
]}

Fukumura, Hiroshi ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Aoba Ku, Sendai, Miyagi 9808578, Japan

来源：

CHEMISTRY LETTERS | 2015年 / 44卷 / 07期

关键词：

OPTICAL-PROPERTIES; ELECTRON DYNAMICS; SIZE DEPENDENCE; NANOPARTICLES; NANOCRYSTALS; RELAXATION; SHAPE;

D O I：

10.1246/cl.150232

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Gold nanostructures deposited on mica were excited with 400-nm sub-ps light pulses. Sub-ps transient absorption spectroscopy showed that excited hot electrons in the gold nanostructures decayed with a time constant of 13 ps through electron-phonon coupling in the nanostructures. Sub-ps time-resolved X-ray diffraction revealed that the (0010) mica lattice constant in a 1.7 mu m thick surface layer expanded with a time constant of 6 ps.

引用

页码：961 / 963

页数：3