Grad school for phd in NANOTECH?? I am planning for a Phd in Nanotechnology, particularly related to Molecular robotics/NEMS/MEMS/ and even nano-composites may do..though its not my first choice currently i am pursuing B.Tech in Mech engg...and have Cumulative gpa (till 6th sem) of 8.7/10 which roughly correspond to 4.00/4.00 ( from online gpa converter)..which colleges should i apply ??..the list i prepared is 1)northwestern 2) Ohio state univ. 3)Michigan 4)USC viterbi what are prospects of getting GRA/GTA (for phd) at these colleges for international students??