Hi aspirant

You can pursue masters in nano technology .These courses are present in various colleges.

M.sc in Nanotechnology

M.sc in Nanoscience and technology

M.tech in Nanotechnology

M.tech in material science and Nanotechnology

You can appear in GATE(for M.tech) to take admission in these stream or either in entrance organised by different universities.

You can visit these link given below :

https://www.careers360.com/nano-technology-engineering-course

https://www.careers360.com/nano-technology-and-robotics-course

Hope this helps.