Hi Nidhi

The top Colleges for Nanotechnology in Maharashtra are 

• Indian Institute of Technology Bombay. ...
• Visvesvaraya National Institute of Technology Nagpur. ...
• Institute of Chemical Technology, Mumbai. ...
• Bharati Vidyapeeth Deemed University College ofEngineering, Pune. ...
• University of Mumbai, Mumbai. ...
• Dr Babasaheb Ambedkar Marathwada University, Aurangabad. ...
• North Maharashtra University, Jalgaon.

The Top College in Karnataka are

• Manipal Academy of Higher Education : Department of Atomic and Molecular Physics (DAMP), Manipal

• Manipal University : The Department of Atomic and Molecular Physics (DAMP), Manipal

• Indian Institute of Science : Centre for Nano Science and Engineering (CeNSE) , Bangalore

• SRM Research Institute, Bangalore

• Mount Carmel College, Bangalore

• JSS University : Faculty of Life Sciences, Mysore

The above mentioned colleges are Best for Nanotechnology Engineering across the India

Hope you got your Answer...Feel free to ask questions