Submitted on: 08 September 2013.
Revised on: 11 November 2013.
Accepted on: 02 December 2013.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
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Submitted on: 30 August 1998.
Revised on: 21 December 1998.
Accepted on: 14 February 1999.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
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Submitted on: 04 October 2013.
Revised on: 28 January 2014.
Accepted on: 14 February 2014.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
Submitted on: 27 September 2017.
Revised on: 31 December 2017.
Accepted on: 17 February 2018.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
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