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Submitted on: 04 April 2004.
Revised on: 03 May 2004.
Accepted on: 26 May 2004.
___________________Beilstein Journal of Nanotechnology
Submitted on: 26 August 2015.
Revised on: 19 November 2015.
Accepted on: 15 December 2015.
___________________Beilstein Journal of Nanotechnology
Submitted on: 11 January 2008.
Revised on: 18 March 2008.
Accepted on: 29 March 2008.
___________________Beilstein Journal of Nanotechnology
Submitted on: 06 September 2005.
Revised on: 29 December 2005.
Accepted on: 11 February 2006.
___________________Beilstein Journal of Nanotechnology
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