In addition, he is a distinguished visiting professor at the Indian Institute of Technology Bombay, adjunct professor at the Jawaharlal Nehru University (New Delhi), Tata Institute of Fundamental Research, Indian Institute of Science Education and Research (Kolkata), Swinburne University of Technology (Australia), and honorary professor at the Jawaharlal Nehru Centre for Advanced Scientific Research (Bangalore).

[3] In 2016, Chattopadhyay won The World Academy of Sciences in Biology for his seminal contribution in understanding the role of membrane cholesterol in the organization and function in healthy and diseased conditions.

Chattopadhyay's work is focused on monitoring organization, dynamics and function of biological membranes in healthy and diseased conditions.

His group has developed and applied novel, innovative and sensitive techniques based on fluorescence spectroscopy for monitoring solvent relaxation in membranes, membrane-mimetic media, and proteins.

In addition, his work has provided novel insight in the role of membrane cholesterol in the entry of pathogens into host cells.