Effects of precursor pre-treatment on the vapor deposition of WS2 monolayers Pam, Mei Er ; Shi, Yumeng ; Hu, Junping ; Zhao, Xiaoxu ; Dan, Jiadong ; Gong, Xue ; Huang, Shaozhuan ; Geng, Dechao ; Pennycook, Stephen ; Ang, Lay Kee ; Yang, Hui Ying Abstract Publication: Nanoscale Advances Pub Date: March 2019 DOI: 10.1039/C8NA00212F Bibcode: 2019NanoA...1..953P