Size dependence of ultrafast charge dynamics in monodisperse Au nanoparticles supported on TiO2 colloidal spheres

Al-Otaify, A, Leontiadou, M ORCID: https://orcid.org/0000-0003-2616-1841, dos Reis, FVE, Damato, TC, Camargo, PHC and Binks, DJ 2014, 'Size dependence of ultrafast charge dynamics in monodisperse Au nanoparticles supported on TiO2 colloidal spheres' , Physical Chemistry Chemical Physics, 16 , pp. 14189-14194.

Full text not available from this repository. (Request a copy)

Abstract

Sub-nanosecond charge dynamics in monodisperse Au nanoparticles (NPs) supported on TiO2 colloidal spheres are studied as a function of NP diameter using ultrafast transient absorption spectroscopy. The decay of the transmittance changes observed in the region of the plasmon resonance of the Au NPs following photoexcitation of the TiO2 spheres are well-described by a bi-exponential function consisting of a fast component of 2 ps duration associated with electron–phonon scattering, followed by a slow and relatively weak component associated with phonon–phonon scattering. The decay constant characterising the latter component was found to be dependent on the size of the Au NPs, rising from 49 ± 3 to 128 ± 6 ps as the diameter of the Au NPs increased from 12.2 ± 2.2 nm to 24.5 ± 2.8 nm, respectively.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
ISSN: 1463-9076
Related URLs:
Funders: Engineering and Physical Sciences Research Council (EPSRC)
Depositing User: Dr MARINA LEONTIADOU
Date Deposited: 02 Apr 2019 08:27
Last Modified: 02 Apr 2019 08:27
URI: http://usir.salford.ac.uk/id/eprint/50855

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)