1. Department of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
2. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
3. Food Industry Research and Development Institute, Hsinchu 300, Taiwan
4. Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan