A team of LASSP researches, led by Prof Paul McEuen in the Kavli Institute at Cornell for Nanoscale Science,  have been using graphene to understand how electrons cool. Using novel methods they observed for the first time how electrons slowly cool in single-atom thick sheets of graphene.

Find out more at the Chronicle: http://www.news.cornell.edu/stories/Dec12/grapheneCool.html

And the full Nature Physics article is available at http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys2493.html