Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Slow Charge Carrier Relaxation in Gold Nanoparticles
 
research article

Slow Charge Carrier Relaxation in Gold Nanoparticles

Wang, Lijie  
•
Rossi, Thomas  
•
Oppermann, Malte  
Show more
November 5, 2020
Journal Of Physical Chemistry C

We report on ultrafast transient absorption (TA) studies of surface plasmon-excited similar to 25 nm-diameter Au nanoparticles in solution, monitoring the response of the surface plasmon resonance in the visible region (1.7-3.0 eV) and that of the inter- and intraband transitions in the deep UV region (3.4-4.5 eV). The former reflects lattice heating by electron-phonon energy transfer, while the latter monitors charge carriers, that is, excess holes and electrons, respectively, below and above the Fermi level. Although the steady-state UV absorption spectrum of Au is featureless, the TA spectra reveal three bands that appear promptly upon plasmon excitation and decay over hundreds of picoseconds (ps). Based on the band structure diagram of bulk Au, we attribute symmetry points. The decay of the hot electrons monitored via the probing the intraband transitions at the L symmetry points below the latter requiring tens of ps. These results show that after the initial processes, hot charge carriers above and below the Fermi level remain of ps.

  • Details
  • Metrics
Type
research article
DOI
10.1021/acs.jpcc.0c07755
Web of Science ID

WOS:000589917300033

Author(s)
Wang, Lijie  
Rossi, Thomas  
Oppermann, Malte  
Bauer, Benjamin  
Mewes, Lars  
Zare, Davood  
Chow, Tsz Him
Wang, Jianfang
Chergui, Majed  
Date Issued

2020-11-05

Publisher

AMER CHEMICAL SOC

Published in
Journal Of Physical Chemistry C
Volume

124

Issue

44

Start page

24322

End page

24330

Subjects

Chemistry, Physical

•

Nanoscience & Nanotechnology

•

Materials Science, Multidisciplinary

•

Chemistry

•

Science & Technology - Other Topics

•

Materials Science

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSU  
Available on Infoscience
December 23, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/174261
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés