1. Division of Inorganic and Physical Chemistry,
Faculty of Mathematics and Natural Sciences, and ‡Research Center for Nanosciences
and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 40132, Indonesia
2. Department of Chemistry, Faculty of
Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia