http://reply.papertrans.cn/1/1/2/2-11.png
http://reply.papertrans.cn/1/1/2/2-12.png
Submitted on: 15 November 2005.
Revised on: 23 December 2005.
Accepted on: 05 January 2006.
___________________2D Materials---IOP PUBLISHING LTD
http://reply.papertrans.cn/1/1/2/2-14.png
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Submitted on: 26 July 2002.
Revised on: 21 August 2002.
Accepted on: 03 October 2002.
___________________2D Materials---IOP PUBLISHING LTD
http://reply.papertrans.cn/1/1/2/2-17.png
Submitted on: 23 October 2003.
Revised on: 04 December 2003.
Accepted on: 04 January 2004.
___________________2D Materials---IOP PUBLISHING LTD
Submitted on: 19 December 2016.
Revised on: 21 March 2017.
Accepted on: 06 May 2017.
___________________2D Materials---IOP PUBLISHING LTD
Submitted on: 16 September 2017.
Revised on: 20 November 2017.
Accepted on: 29 December 2017.
___________________2D Materials---IOP PUBLISHING LTD