School of Chemical and Material Engineering;
Jiangnan University;
Wuxi 214122;
China;
School of Chemistry and Chemical Engineering;
Key Laboratory of Mesoscopic Chemistry;
Nanjing University;
Nanjing 210093;
China;
School of Food Science and Technology;
Jiangnan University;
Wuxi 214122;
China Received 28 June 2010;