Ultrafast dynamics of photoexcited gold nanostructures on mica substrates probed by transient absorption spectroscopy and time-resolved x-ray diffraction

Hikaru Sotome, Yosuke Azuma, Sho Asami, Shin Ichi Matsushima, Shinji Kajimoto, Hiroshi Fukumura

Research output: Contribution to journalArticle

Abstract

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 μm thick surface layer expanded with a time constant of 6 ps.

Original languageEnglish
Pages (from-to)961-963
Number of pages3
JournalChemistry Letters
Volume44
Issue number7
DOIs
Publication statusPublished - 2015 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)

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