1. Department of Materials Engineering, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung 35365, Lampung, Indonesia
2. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, Yogyakarta 55281, Indonesia
3. Department of Physics, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung 35365, Lampung, Indonesia
4. PT Nanosense Instrument Indonesia, Umbulharjo, Yogyakarta 55167, Indonesia
5. Research and Innovation Center for Advanced Materials, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung 35365, Lampung, Indonesia