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Submitted on: 17 October 2010.
Revised on: 03 January 2011.
Accepted on: 08 February 2011.
___________________e-Journal of Surface Science and Nanotechnology
Submitted on: 06 May 2001.
Revised on: 23 June 2001.
Accepted on: 05 July 2001.
___________________e-Journal of Surface Science and Nanotechnology
Submitted on: 13 January 2002.
Revised on: 24 April 2002.
Accepted on: 10 May 2002.
___________________e-Journal of Surface Science and Nanotechnology