1. Department of Physics Institut Teknologi Sumatera Terusan Ryacudu, Way Hui, Jati Agung Lampung 35365 Indonesia
2. Research and Innovation Center for Advanced Materials Institut Teknologi Sumatera Terusan Ryacudu, Way Hui, Jati Agung Lampung 35365 Indonesia
3. Department of Materials Engineering Institut Teknologi Sumatera Terusan Ryacudu, Way Hui, Jati Agung Lampung 35365 Indonesia
4. Division of Inorganic and Physical Chemistry, Research Center for Nanoscience and Nanotechnology Center for Catalysis Reaction and Engineering Institut Teknologi Bandung Bandung 40132 Indonesia