1. Department of Chemistry, National Institute of Technology Hamirpur, Hamirpur-177005, Himachal Pradesh, India
2. Department of Physics, University of the Free State (UFS), Bloemfontein, ZA 9300, South Africa
3. Laboratory of Sensors, Nanomedicine and Nanostructured Materials, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil
4. Chemistry Department, Moscow State University, Moscow, 119991, Russian Federation
5. Optical-Bio Microsystems Laboratory, Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, QC H3G1M8, Canada
6. School of Microelectronics, Faculty of Electronic Information and Electrical Engineering, Key Lab. of Liaoning for Integrated Circuits Technology, Dalian University of Technology, Dalian, China