If you are seeking b.tech according to future scope than go for Nanotechnology field
because as there are more graduates from CSE branch and a lot more competition where as on other hand Nanotechnology branch has low no. of graduates

Nanotechnology is a highly interdisciplinary field and and is considered to be a confluence of engineering, technology and pure sciences such as physics, chemistry, biology and material sciences. Students who are interested in pursuing a career in Nanotechnology must be willing to learn from different fields.

• It is one of the top ranked subject related to academic and research. Nanotechnology is the branch of Technology. It deals with the study of extremely small things and can be used across all the other science fields, such as chemistry, biology, physics, materials science, and engineering. It is rapidly expanding area of research with huge potential to revolutionize our lives and to provide technological solutions to our problems in agriculture, energy, the environment and medicine.

It has a huge scope in the upcoming generations. It is the third highest booming field when compared with IT and Internet. In India, Bangalore and Chennai are the manufacturing hub for IT and Medicine. The Indian government has already started Nano science and Nanotechnology initiatives and various funding agencies like the Department of Science and Technology.

One can find job as nano-technologists specialists or scientists. The areas where a nano-technologist can seek employment include biotechnology, agriculture, food, genetics, space research, medicine and so on. Job opportunities are also available in National Physical Laboratory, Indian Institute of Astrophysics etc. Candidates with Ph. D can also join as faculty members in Universities and colleges or research fields.

>Industries / Companies / who hire these professionals:

• Electronics / Semiconductor Industry
• Manufacturing Industries
• Biotechnology Medical Fields
• Pharmaceuticals Environmental Universities
• Product based companies (food)
• Research Laboratory

>Around Rs 20,000/- to Rs 30,000 per month for fresher and Rs 1 lakh per month for experienced candidates.

Computer Science Engineers are paid good but they had to work a lot hard to get there were you can easily reach by Nano-Technology

Thank you :)