1. School of Chemical Engineering and Physical Sciences, Department of Physics, Lovely Professional University, Phagwara, Punjab 144411, India, https://orcid.org/0000-0001-7569-7824 (A.S.)
2. Department of Chemistry, Guru Nanak Dev University, Amritsar, Punjab 143005, India
3. School of Chemical Engineering and Physical Sciences, Department of Physics, Lovely Professional University, Phagwara, Punjab 144411, India (Corresponding author), e-mail: srivastava_phy@yahoo.co.in, https://orcid.org/0000-0001-6342-0764