1. Semiconducting Oxide Materials, Nanostructures, and Tailored Heterojunction (SOMNaTH) Lab, Physics Department, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
2. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan, ROC
3. Precision Analysis and Materials Research Centre, National Taipei University of Technology, Taipei 10608, Taiwan, ROC