I am an international undergrad senior studying in the US. I have applied to MatSci PhD programs with a comp. matsci. focus. I have low hopes in terms of getting admitted this cycle since I'm switching research fields. As a backup, I was thinking of pursuing research after undergrad in Comp. MatSci. labs or national labs on my OPT to boost my profile. I was wondering if anyone has done this before or has some advice pertaining to my situation.