Dr. Brajesh Kumar is currently working as an Assistant Professor and Head in the Post Graduate Department of Chemistry, TATA College, Chaibasa, India. He received a Ph.D. in Chemistry from the University of Delhi, India. His research interests include the development of sustainable and eco-friendly techniques for nanoparticle synthesis and their applications for environmental remediation, active films of organic solar cells, nanomedicine, sensors, natural product extraction, purification and analysis, natural polymers, peptide chemistry, microwave and ultrasound assisted organic synthesis, and organic synthesis. Dr. Brajesh Kumar has held different national and international fellowships and worked as a faculty member in various universities throughout India, Ecuador, and South Korea. He has also published numerous SCI/SCIE/Scopus research articles (h index = 20, Citations 1,156) and is also an active reviewer of more than 50 journals.