Atomic-scale Observation of Grains and Grain Boundaries in Monolayers of WS2 Azizi, Amin ; Zou, Xiaolong ; Ercuis, Peter ; Zhang, Zhuhua ; Laura Elias, Ana ; Perea-López, Néstor ; Terrones, Mauricio ; Yakobson, Boris I. ; Alem, Nasim Abstract Publication: Microscopy and Microanalysis Pub Date: August 2014 DOI: 10.1017/S1431927614007144 Bibcode: 2014MiMic..20S1084A