Optical properties and coherent vibrational oscillations of gold nanostars

Damon A. Wheeler, Thomas D. Green, Haining Wang, Cristina Fernández-López, Luis Liz-Marzán, Shengli Zou, Kenneth Knappenberger, Jin Z. Zhang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Hot electron relaxation and coherent vibrational oscillations of gold nanostars (AuNS) were studied using femtosecond laser spectroscopy. Transient profiles feature a fast decay attributed to electron-phonon interaction and a slower decay due to phonon relaxation. Superimposed on the slow decay are oscillations attributed to coherent vibrations of the AuNS with a period dependent on probe wavelength, due to size variation of the AuNS. In addition, persistent spectral hole-burning studies indicate depletion of AuNS at the excitation wavelength and formation of redder-absorbing AuNS aggregates. In conjunction with experiments, theoretical calculations were carried out to gain insight into the coherent vibrational oscillations.

Original languageEnglish (US)
Pages (from-to)127-132
Number of pages6
JournalChemical Physics Letters
Volume543
DOIs
StatePublished - Aug 10 2012

Fingerprint

Gold
Optical properties
gold
optical properties
Wavelength
Electron-phonon interactions
oscillations
Laser spectroscopy
Hot electrons
decay
Ultrashort pulses
hole burning
electron phonon interactions
laser spectroscopy
hot electrons
wavelengths
depletion
vibration
probes
Experiments

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Wheeler, D. A., Green, T. D., Wang, H., Fernández-López, C., Liz-Marzán, L., Zou, S., ... Zhang, J. Z. (2012). Optical properties and coherent vibrational oscillations of gold nanostars. Chemical Physics Letters, 543, 127-132. https://doi.org/10.1016/j.cplett.2012.06.058
Wheeler, Damon A. ; Green, Thomas D. ; Wang, Haining ; Fernández-López, Cristina ; Liz-Marzán, Luis ; Zou, Shengli ; Knappenberger, Kenneth ; Zhang, Jin Z. / Optical properties and coherent vibrational oscillations of gold nanostars. In: Chemical Physics Letters. 2012 ; Vol. 543. pp. 127-132.
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Wheeler, DA, Green, TD, Wang, H, Fernández-López, C, Liz-Marzán, L, Zou, S, Knappenberger, K & Zhang, JZ 2012, 'Optical properties and coherent vibrational oscillations of gold nanostars', Chemical Physics Letters, vol. 543, pp. 127-132. https://doi.org/10.1016/j.cplett.2012.06.058

Optical properties and coherent vibrational oscillations of gold nanostars. / Wheeler, Damon A.; Green, Thomas D.; Wang, Haining; Fernández-López, Cristina; Liz-Marzán, Luis; Zou, Shengli; Knappenberger, Kenneth; Zhang, Jin Z.

In: Chemical Physics Letters, Vol. 543, 10.08.2012, p. 127-132.

Research output: Contribution to journalArticle

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Wheeler DA, Green TD, Wang H, Fernández-López C, Liz-Marzán L, Zou S et al. Optical properties and coherent vibrational oscillations of gold nanostars. Chemical Physics Letters. 2012 Aug 10;543:127-132. https://doi.org/10.1016/j.cplett.2012.06.058