van der Waals Force: A Dominant Factor for Reactivity of Graphene Lee, Jong Hak ; Avsar, Ahmet ; Jung, Jeil ; Tan, Jun You ; Watanabe, K. ; Taniguchi, T. ; Natarajan, Srinivasan ; Eda, Goki ; Adam, Shaffique ; Castro Neto, Antonio H. ; Özyilmaz, Barbaros Abstract Publication: Nano Letters Pub Date: January 2015 DOI: 10.1021/nl5036012 Bibcode: 2015NanoL..15..319L