1. Department of Chemical Engineering & Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhong-Xiao E. Road, Da’an District, Taipei City 10608, Taiwan
2. Department of Optoelectronic Engineering, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien 97401, Taiwan