Gas-induced selective re-orientation of Au-Cu nanoparticles on TiO 2 (110)
Axel Wilson (INSP), Aude Bailly (SIN), Romain Bernard (INSP-E6), Yves, Borensztein (INSP-E6), Alessandro Coati (SSOLEIL), Bernard Croset (INSP-E6),, Herv\'e Cruguel (INSP-E6), Ahmed Naitabdi (LCPMR), Mathieu Silly (SSOLEIL),, Marie-Claire Saint-Lager (SIN ), Alina Vlad (SSOLEIL)
TL;DR
This study investigates how gas exposure influences the re-orientation of Au-Cu nanoparticles on TiO2 (110) surfaces, revealing gas-induced structural changes through in-situ X-ray techniques.
Contribution
It demonstrates gas-induced re-orientation of Au-Cu nanoparticles on TiO2 (110), providing insights into their structural dynamics under reactive gas conditions.
Findings
Gas exposure causes re-orientation of Au-Cu NPs.
In-situ X-ray techniques reveal structural changes.
Re-orientation depends on temperature and gas environment.
Abstract
Au-Cu bimetallic nanoparticles (NPs) grown on TiO 2 (110) have been followed in-situ using grazing incidence x-ray diffraction and x-ray photoemission spectroscopy from their synthesis to their exposure to a CO/O 2 mixture at low pressure (P < 10-5 mbar) and at different temperatures (300 K-470 K). As-prepared samples are composed of two types of alloyed NPs: randomly oriented and
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