1. Department of Physics, Faculty of Science and Technology, UIN Sunan Kalijaga, Yogyakarta, Indonesia;
2. Department of Physics, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, Indonesia;
3. Researcher of Surfactant and Bioenergy Research Center (SBRC) of the Institute for Research and Community Service (LPPM IPB), IPB University, Bogor, Indonesia;
4. Advanced Functional Materials Laboratory, Department of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, Indonesia;
5. Department of Chemistry, Airlangga University, Surabaya, Indonesia;
6. Department of Nuclear and Technical Physics, Faculty of Engineering, Gadjah Mada University, Yogyakarta, Indonesia