MoS2 Nanosheet Phototransistors with Thickness-Modulated Optical Energy Gap Lee, Hee Sung ; Min, Sung-Wook ; Chang, Youn-Gyung ; Park, Min Kyu ; Nam, Taewook ; Kim, Hyungjun ; Kim, Jae Hoon ; Ryu, Sunmin ; Im, Seongil Abstract Publication: Nano Letters Pub Date: July 2012 DOI: 10.1021/nl301485q Bibcode: 2012NanoL..12.3695L