From Twitter https://twitter.com/drsekula: RT @usnistgov: Hooked on Phonons: Measuring Vibrations in #Graphene http://www.nist.gov/cnst/201506_graphene_phonons.cfm #physics https://twitter.com/usnistgov/status/611531926055354369/photo/1 https://chirp.cooleysekula.net/attachment/2406