1. Department of Chemistry, Presidency University, Kolkata 700073, India
2. Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China
3. Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy
4. Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA