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Titania surface structures for directed growth of metal nanoparticles via metal vapour deposition and metal organic chemical vapour deposition

Titania surface structures for directed growth of metal nanoparticles via metal vapour deposition and metal organic chemical vapour deposition
Titania surface structures for directed growth of metal nanoparticles via metal vapour deposition and metal organic chemical vapour deposition
In this paper metal vapour deposition and metal organic chemical vapour deposition have been used to produce nanoscale metal particles on various TiO2(110) surfaces. The nanoparticles (Pd and Rh) are imaged directly by scanning tunnelling microscopy at ambient and elevated temperature in ultra high vacuum. The surface reconstruction of the TiO2 to a cross-linked (1 x 2) is used to form highly corrugated rectangular arrays that direct the growth of the Pd clusters. Thermal annealing at first induces a flattening and then a sintering of the nanoparticles. Ultimately the particles form a wide distribution of shapes and sizes. A crystal displaying crystallographic shear planes, composed of a self assembled array of alternating up-down step edges on the terrace, is used to direct the growth of Rh nanoparticles from [Rh(CO)(2)Cl](2). The particles are shown to grow mainly at the top edge of each step that runs at an angle to the principal directions of the surface.
scanning-tunneling-microscopy, tio2(110) surface, tio2 surfaces, stm, rhodium, pd, spectroscopy, nucleation, (2), visualization
0267-0836
710-716
Bennett, R.A.
a8308439-3db6-4f3d-821d-866fbe333a2d
Newton, M.A.
cf7f71a3-7c53-46f4-bf2d-9c02e0f2eda0
Smith, R.D.
513e9ddc-d10d-4a54-ad55-4cb7e439620d
Evans, J.
05890433-0155-49fe-a65d-38c90ea25c69
Bowker, M.
8e99ffe0-6f5e-442e-a30a-158afaa3f85c
Bennett, R.A.
a8308439-3db6-4f3d-821d-866fbe333a2d
Newton, M.A.
cf7f71a3-7c53-46f4-bf2d-9c02e0f2eda0
Smith, R.D.
513e9ddc-d10d-4a54-ad55-4cb7e439620d
Evans, J.
05890433-0155-49fe-a65d-38c90ea25c69
Bowker, M.
8e99ffe0-6f5e-442e-a30a-158afaa3f85c

Bennett, R.A., Newton, M.A., Smith, R.D., Evans, J. and Bowker, M. (2002) Titania surface structures for directed growth of metal nanoparticles via metal vapour deposition and metal organic chemical vapour deposition. Materials Science and Technology, 18 (7), 710-716. (doi:10.1179/026708302225003802).

Record type: Article

Abstract

In this paper metal vapour deposition and metal organic chemical vapour deposition have been used to produce nanoscale metal particles on various TiO2(110) surfaces. The nanoparticles (Pd and Rh) are imaged directly by scanning tunnelling microscopy at ambient and elevated temperature in ultra high vacuum. The surface reconstruction of the TiO2 to a cross-linked (1 x 2) is used to form highly corrugated rectangular arrays that direct the growth of the Pd clusters. Thermal annealing at first induces a flattening and then a sintering of the nanoparticles. Ultimately the particles form a wide distribution of shapes and sizes. A crystal displaying crystallographic shear planes, composed of a self assembled array of alternating up-down step edges on the terrace, is used to direct the growth of Rh nanoparticles from [Rh(CO)(2)Cl](2). The particles are shown to grow mainly at the top edge of each step that runs at an angle to the principal directions of the surface.

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More information

Published date: 2002
Keywords: scanning-tunneling-microscopy, tio2(110) surface, tio2 surfaces, stm, rhodium, pd, spectroscopy, nucleation, (2), visualization

Identifiers

Local EPrints ID: 19673
URI: http://eprints.soton.ac.uk/id/eprint/19673
ISSN: 0267-0836
PURE UUID: 8b2d7116-f5f1-4aa7-b411-db4ebfed8ecf

Catalogue record

Date deposited: 16 Feb 2006
Last modified: 15 Jul 2019 19:26

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