1. Graduate Program of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, West Java 40132, Indonesia
2. Advanced Functional Materials Research Group, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, West Java 40132, Indonesia
3. Research Centre for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung, West Java 40132, Indonesia
4. Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia