Submitted on: 06 October 2008.
Revised on: 17 October 2008.
Accepted on: 07 November 2008.
Materials Today Physics
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Submitted on: 28 February 2023.
Revised on: 09 March 2023.
Accepted on: 22 March 2023.
Materials Today Physics
Submitted on: 27 July 2016.
Revised on: 23 August 2016.
Accepted on: 31 August 2016.
Materials Today Physics
http://reply.papertrans.cn/3/215/21406/21406-35.png
Submitted on: 14 October 2011.
Revised on: 24 October 2011.
Accepted on: 01 November 2011.
Materials Today Physics