http://reply.papertrans.cn/3/219/21878/21878-31.png
Submitted on: 13 March 2012.
Revised on: 20 April 2012.
Accepted on: 12 May 2012.
Micro and Nano Engineering---ELSEVIER
http://reply.papertrans.cn/3/219/21878/21878-33.png
http://reply.papertrans.cn/3/219/21878/21878-34.png
Submitted on: 25 June 2013.
Revised on: 06 July 2013.
Accepted on: 20 July 2013.
Micro and Nano Engineering---ELSEVIER
http://reply.papertrans.cn/3/219/21878/21878-36.png