1. Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, West Java, Indonesia
2. Department of Physic, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, West Java, Indonesia
3. Functional Nano Powder University Center of Excellence, Universitas Padjadjaran, Sumedang 45363, West Java, Indonesia