Hi Punith

Bachelor of Technology with specialization in Electronics and Nanotechnology is an undergraduate degree program which is of four years . This course can be done after 10 + 2 or equivalent exam from a recognized board. Admission to this course is done through any entrance exam conducted at national and state level. Some are :

• JEE Mains
• BITSAT
• MHCET
• UPSEE

Some of the colleges are :

IIMT Institute of Engineering and Technology

Institute of Engineering and Communication

SRM university

Amity

and many more...

You can refer to the link below : https://engineering.careers360.com/colleges/list-of-be-btech-in-nano-technology-engineering-colleges-in-india

Hope it helps :)