I am saiarun doing my M.Sc(physics)specialization in Electronics in India. I wish to pursue M.S. or Ph.D in Nanotechnology in U.S. . I wish to get into any of the top ranking universities in U.S. like stanford,caltech ,harvard etc. I will be working as project assisstant for next one year in IISc, bangalore,India to gain research experience. My question is should I write a)physics subject G.R.E for getting into M.S./Ph.D along with b)General G.R.E and c)TOEFL. With my academic background of M.Sc and one year of research experience should I go directly for Ph.D. or should i go through M.S.course. What is the average score required in the above mentioned three exams, for getting into those prestigious university. Do any of the members in the group have contact with professors in those universities. Thanking you in advance.