Chemically Synthesised Atomically Precise Gold Clusters Deposited and Activated on Titania. Part II
Loading...
Date
2013-07-24
Authors
Anderson, David P
Adnan, Rohul H
Alvino, Jason F
Shipper, Oliver
Donoeva, Baira
Ruzicka, Jan-Yves
Al Qahtani, Hassan
Cowie, Bruce
Aitken, Jade B
Golovko, Vladimir B
Journal Title
Journal ISSN
Volume Title
Publisher
Royal Society of Chemistry
Rights
This journal is © the Owner Societies 2013
Rights Holder
the Owner Societies
Abstract
Synchrotron XPS was used to investigate a series of chemically synthesised, atomically precise gold clusters Aun(PPh3)y (n = 8, 9 and 101, y depending on the cluster size) immobilized on anatase (titania) nanoparticles. Effects of post-deposition treatments were investigated by comparison of untreated samples with analogues that have been heat treated at 200 °C in O2, or in O2 followed by H2 atmosphere. XPS data shows that the phosphine ligands are oxidised upon heat treatment in O2. From the position of the Au 4f7/2 peak it can be concluded that the clusters partially agglomerate immediately upon deposition. Heating in oxygen, and subsequently in hydrogen, leads to further agglomeration of the gold clusters. It is found that the pre-treatment plays a crucial role in the removal of ligands and agglomeration of the clusters.
Description
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)
Keywords
Citation
Anderson, D., Adnan, R., Alvino, J., Shipper, O., Donoeva, B., Ruzicka, J., et al. (2013). Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II. Physical Chemistry Chemical Physics, 15(35) pp. 14806-14813.