Submitted on: 08 July 2011.
Revised on: 01 November 2011.
Accepted on: 17 November 2011.
___________________International Journal of Nano Dimension
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Submitted on: 28 August 1999.
Revised on: 06 October 1999.
Accepted on: 13 November 1999.
___________________International Journal of Nano Dimension
Submitted on: 17 January 2010.
Revised on: 07 February 2010.
Accepted on: 19 March 2010.
___________________International Journal of Nano Dimension
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Submitted on: 23 March 2007.
Revised on: 26 April 2007.
Accepted on: 07 May 2007.
___________________International Journal of Nano Dimension