Critical size for the observation of quantum confinement in optically excited gold clusters

Oleg Varnavski, Guda Ramakrishna, Junhyung Kim, Dongil Lee, Theodore Goodson

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

(Figure Presented) We present a systematic study of optical properties of a series of hexanethiolate-capped Au clusters of varying sizes using femtosecond transient absorption, time-resolved fluorescence, and two-photon absorption cross-sectional measurements. An abrupt change in optical properties and their trends has been found at the 2.2 nm size. Displacively excited vibrations with a period of 450 fs have been detected in the transient absorption signal for smaller clusters ≤2.2 nm. These results strongly suggest an emerging optical gap between the highest occupied and lowest unoccupied orbitals in the narrow size range at 2.2 nm.

Original languageEnglish
Pages (from-to)16-17
Number of pages2
JournalJournal of the American Chemical Society
Volume132
Issue number1
DOIs
Publication statusPublished - 2010 Jan 13

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Quantum confinement
Gold
Optical properties
Observation
Photons
Fluorescence
Vibration

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Varnavski, Oleg ; Ramakrishna, Guda ; Kim, Junhyung ; Lee, Dongil ; Goodson, Theodore. / Critical size for the observation of quantum confinement in optically excited gold clusters. In: Journal of the American Chemical Society. 2010 ; Vol. 132, No. 1. pp. 16-17.
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Critical size for the observation of quantum confinement in optically excited gold clusters. / Varnavski, Oleg; Ramakrishna, Guda; Kim, Junhyung; Lee, Dongil; Goodson, Theodore.

In: Journal of the American Chemical Society, Vol. 132, No. 1, 13.01.2010, p. 16-17.

Research output: Contribution to journalArticle

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AU - Goodson, Theodore

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