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http://reply.papertrans.cn/3/226/22585/22585-32.png
Submitted on: 23 September 2005.
Revised on: 29 October 2005.
Accepted on: 06 November 2005.
Nanoscale Advances---ROYAL SOC CHEMISTRY
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Submitted on: 27 April 2006.
Revised on: 17 May 2006.
Accepted on: 07 June 2006.
Nanoscale Advances