Dear Aspirant,

Yes you can become a nanotechnologist without taking CS as your branch in engineering. After completion of your 12th in science stream with mathematics, you could apply for exam like JEE mains and advanced. After securing a good rank you can apply directly for B Tech in Nanotechnology.

Moreover, you can also look for Bsc programme in Nanotechnology from various institutes. Then after BSc you could go for Msc in Nanotech to increase your job opportunities.

Hope this helps. Thank you.