Fluorescence Concentric Triangles: A Case of Chemical Heterogeneity in WS2 Atomic Monolayer Liu, Hongwei ; Lu, Junpeng ; Ho, Kenneth ; Hu, Zhenliang ; Dang, Zhiya ; Carvalho, Alexandra ; Tan, Hui Ru ; Tok, Eng Soon ; Sow, Chorng Haur Abstract Publication: Nano Letters Pub Date: September 2016 DOI: 10.1021/acs.nanolett.6b02111 Bibcode: 2016NanoL..16.5559L