Hello, 

Nanotech has huge scope. A major portion of it lies towards research. Currently with the advancement of NEMS and thin film electronics the applications of nano have increased even more. There is research being done on nanoparticles for treatment of cancer and there are studies on programmable nano devices.

The study cost for btech in nanotechnology in india costs around 10lakh to 15lakh.

To get more information regarding the course as well as colleges, please go through the following link 

https://www.shiksha.com/b-tech/colleges/b-tech-in-nanotechnology-colleges-india

Hope this helps.....