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Nanopatterning on Reconstructed Ceramic Surfaces

Published online by Cambridge University Press:  15 March 2011

Shwetha Shetty A,
Vijay B Shenoy,
C. Barry Carter and
N. Ravishankar
Shwetha Shetty A
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
Vijay B Shenoy
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
C. Barry Carter
Affiliation:
Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
N. Ravishankar
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
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Abstract

The use of reconstructed ceramic surfaces as templates for nanopatterning has been demonstrated recently. This technique differs from the surface decoration by Au on stepped surfaces of alkali halides which has been a topic of intense research in the past. Some of the intriguing aspects related to the physical origin of the phenomena have been considered here. Based on heterogeneous nucleation of Pt vapor on wedged alumina surfaces, it has been shown that the valley sites are the preferred sites for nucleation. However, the hill sites are decorated by the particles in the present study pointing out to a different physical origin for the formation of the nanoparticles. The role of electrostatic energy reduction on the formation of such nanopatterns is discussed.

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