The early researches of Chattopadhyay during his doctoral studies with Ramachandra Rao were on rapid solidification of aluminum alloys and it was during this time he is reported to have discovered aluminum-based binary glass and nanodispersed composites [REF].
Chattopadhyay is the co-director of Solar Energy Research Institute for India and United States (SERIIUS),[REF] an Indo-US joint venture for the development of low cost solar electric technologies,[REF] and has conducted a number of seminars and symposia on behalf of the consortium [REF].