1. Microelectronics, School of Advanced Technologies, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani, 12120, Thailand
2. National Metal and Materials Technology Center, 114 Thailand Science Park, Phaholyothin Road, Klong 1, Klong Luang, Pathumthani, 12120, Thailand
3. Polymer Chemistry, Materials Chemistry, Uppsala University, P.O. Box 538, SE-751 21,Uppsala, Sweden