Students often ask me, "I want to study nanotechnology. What should I study? And where?"
Eric Drexler has written an excellent answer to this question. A partial summary of his several pages of good advice:
Start with the fundamentals.
Remember that science and engineering are different. Focus on problem-solving at the interface between them.
Expect nanotech to continue moving toward more precise and useful nanostructures, in more materials.
Decide where to study after you decide what to study.