Comparison of Au and TiO2 based catalysts for the synthesis of chalcogenide nanowires

Schoenherr, P., Prabhakaran, D., Jones, W., Dimitratos, Nikolaos ORCID: https://orcid.org/0000-0002-6620-4335, Bowker, Michael ORCID: https://orcid.org/0000-0001-5075-1089 and Hesjedal, T. 2014. Comparison of Au and TiO2 based catalysts for the synthesis of chalcogenide nanowires. Applied Physics Letters 104 (25) , p. 253103. 10.1063/1.4885217

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Abstract

We present a comparative study of TiO2-based and Au catalysts for the physical vapor deposition of (Bi1−xSbx)2Se3 topological insulator nanowires. The standard Au nanoparticle catalyst was compared to five TiO2 nanoparticle based catalysts (anatase, rutile, P-25, high surface area anatase, and TiO2 supported Au particles). The use of Au nanoparticles seriously harms the properties of nanowires, thereby limiting their application. In contrast, TiO2 based catalysts lead to the residue-free growth of nanowires with a higher degree of crystallinity. Homogeneous nanowire ensembles are achieved with the mixed phase P-25 catalyst, and a possible growth mechanism is proposed.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Chemistry
Subjects:	Q Science > QC Physics
Additional Information:	PDF uploaded in accordance with publisher's policies at http://www.sherpa.ac.uk/romeo/issn/0003-6951/ (accessed 2.6.16).
Publisher:	American Institute of Physics
ISSN:	0003-6951
Date of First Compliant Deposit:	2 June 2016
Last Modified:	23 May 2023 16:12
URI:	https://orca.cardiff.ac.uk/id/eprint/65718

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