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Submitted on: 14 January 2018.
Revised on: 14 April 2018.
Accepted on: 13 May 2018.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
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Submitted on: 15 July 2004.
Revised on: 05 November 2004.
Accepted on: 10 December 2004.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
Submitted on: 12 August 2020.
Revised on: 09 November 2020.
Accepted on: 10 December 2020.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology
Submitted on: 04 July 2016.
Revised on: 17 September 2016.
Accepted on: 13 October 2016.
___________________Advances in Natural Sciences-Nanoscience and Nanotechnology