Not really, I just like nice clothes. And I like to wear nice clothes. And I feel silly wearing nice clothes when surrounded by others who aren't wearing nice clothes.

One could, however, think of it as a discipline thing. If you wear a perfectly pressed suit you're less likely to slouch. And if you're less likely to slouch, maybe you're less likely to be sloppy in your thoughts, so your research might be better.

Then again, maybe your research would wind up being worse because a suit feels so conformist. Who knows? But it would be a worthwhile experiment.