Slow relaxation of surface plasmon excitations in Au55: the key to efficient plasmonic heating in Au/TiO2

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00471539" target="_blank" >RIV/68378271:_____/16:00471539 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/16:00369803
Result on the web
<a href="http://dx.doi.org/10.1021/acs.jpclett.6b00283" target="_blank" >http://dx.doi.org/10.1021/acs.jpclett.6b00283</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpclett.6b00283" target="_blank" >10.1021/acs.jpclett.6b00283</a>

Result language
angličtina
Original language name
Slow relaxation of surface plasmon excitations in Au55: the key to efficient plasmonic heating in Au/TiO2
Original language description
Gold nanoparticles distinguish themselves from other nanoparticles due to their unique surface plasmon resonance properties that can be exploited for a multiplicity of applications. The promise of plasmonic heating in systems of Au nanoparticles on transition metal oxide supports, for example, Au/TO2, rests with the ability of the surface plasmon in Au nanoparticles to effectively transfer energy into the transition metal oxide. Here, we report a critical observation regarding Au nanoparticle (Au-55) surface plasmon excitations, that is, the relaxation of the surface plasmon excitation is very slow, on the order of several picoseconds. Starting from five plasmon states in Au-55 nanoparticles using nonadiabatic molecular dynamics simulations, we find that the relaxation time constant resulting from these simulations is similar to 6.8 ps, mainly resulting from a long-lived intermediate state found at around0.8 eV. This long-lived intermediate state aligns with the conduction band edge of TiO2, thereby facilitating energy transfer injection from the Au-55 nanoparticle into the TiO2. The current results rule out the previously reported molecular-like relaxation dynamics for Au-55.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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