A few recent items that caught my eye: The ever-creative McEuen and Cohen groups at Cornell worked together to make graphene-based origami widgets .   Access to the paper seems limited right now, but here is a link that has some of the figures. Something else that the Cohen group has worked on in the past are complex fluids, such as colloidal suspensions.  The general statistical physics problem of large ensembles of interacting classical objects (e.g., maybe short-range rigid interactions, as i