Dr. Shikha Gulati (M.Sc., PhD.) is working as an Assistant Professor of Chemistry at Sri Venkateswara College, University of Delhi. She has expertise in Inorganic Chemistry, Nano-materials, Green Chemistry, Medicinal Chemistry, Catalysis, Wastewater treatment, Organometallics, Bio-inorganic Chemistry, and Analytical Chemistry. Dr.Shikha has authored several research papers in International Journals of repute and written numerous books as well as chapters in diverse books which attest to her research aptitude, and good writing skills. Her books are referred to in diverse Universities across India for different undergraduate courses. Dr. Gulati has also been awarded the Young Researcher Award 2020 for her work in the field of Nanotechnology. Her knowledge in the aforementioned fields is paid off immeasurably in this book.