1. College of Material Engineering Fujian Agriculture and Forestry University Fujian Fuzhou 350108 P. R. China
2. Fujian Key Laboratory of Agricultural Information Sensoring Technology College of Mechanical and Electrical Engineering Fujian Agriculture and Forestry University Fuzhou Fujian 350108 P. R. China
3. Department of Material Chemistry Nanchang Hangkong University Nanchang Jiangxi Province 330063 P. R. China