1. Thin Film Laboratory, Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Haryana, India
2. Central Instrumentation Laboratory, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Haryana, India
3. Department of Chemistry, Maulana Azad National Institute of Technology Bhopal, Bhopal, Madhya Pradesh, India
4. Fullbright Climate Fellow, National Renewable Energy Laboratory, Golden, CO, USA