1. Department of PhysicsIndian Institute of Technology Patna Bihta Patna Bihar 801103 India
2. Department of PhysicsUAE University Al‐Ain Abu Dhabi 15551 United Arab Emirates
3. Global Innovative Centre for Advanced NanomaterialsSchool of EngineeringFaculty of Engineering and Built EnvironmentThe University of Newcastle Callaghan NSW 2308 Australia
4. Birck Nanotechnology CentrePurdue University West Lafayette IN 47907 USA