Issue 35, 2013
From the journal:

Physical Chemistry Chemical Physics

Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II†

David P. Anderson,a   Rohul H. Adnan,ab   Jason F. Alvino,c   Oliver Shipper,‡c   Baira Donoeva,a   Jan-Yves Ruzicka,a   Hassan Al Qahtani,d   Hugh H. Harris,c   Bruce Cowie,e   Jade B. Aitken,f   Vladimir B. Golovko,*a   Gregory F. Metha*c  and  Gunther G. Andersson*d  

* Corresponding authors

a The MacDiarmid Institute for Advanced Materials and Nanotechnology, and Department of Chemistry, University of Canterbury, Christchurch 8140, New Zealand
E-mail: vladimir.golovko@canterbury.ac.nz

b Chemistry Department, University of Malaya, 50603 Kuala Lumpur, Malaysia

c School of Chemistry and Physics, The University of Adelaide, Adelaide, SA 5005, Australia
E-mail: greg.metha@adelaide.edu.au

d Flinders Centre for NanoScale Science and Technology, Flinders University, Adelaide, SA 5001, Australia
E-mail: gunther.andersson@flinders.edu.au

e Australian Synchrotron, 800 Blackburn Road, Clayton Vic-3168, Australia

f School of Chemistry, The University of Sydney, Sydney 2006, Australia

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.

Graphical abstract: Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II

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Article information

DOI
https://doi.org/10.1039/C3CP52497C
Article type
Paper
Submitted
16 Jun 2013
Accepted
24 Jul 2013
First published
24 Jul 2013
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2013,15, 14806-14813

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Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II

D. P. Anderson, R. H. Adnan, J. F. Alvino, O. Shipper, B. Donoeva, J. Ruzicka, H. Al Qahtani, H. H. Harris, B. Cowie, J. B. Aitken, V. B. Golovko, G. F. Metha and G. G. Andersson, Phys. Chem. Chem. Phys., 2013, 15, 14806 DOI: 10.1039/C3CP52497C

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