Black Phosphorus Flexible Thin Film Transistors at Gighertz Frequencies Zhu, Weinan ; Park, Saungeun ; Yogeesh, Maruthi N. ; McNicholas, Kyle M. ; Bank, Seth R. ; Akinwande, Deji Abstract Publication: Nano Letters Pub Date: April 2016 DOI: 10.1021/acs.nanolett.5b04768 Bibcode: 2016NanoL..16.2301Z