1. Medical Physics Research Group, Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan;
2. Nanobiotechnology Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan;
3. Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, Zhejiang, P.R. China;
4. Nanobiomaterials Group, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ninbgo City, Zhejiang, China