title: Profound Effect of Substrate Hydroxylation and Hydration on Electronic and Optical Properties of Monolayer MoS2.
abstract: Atomic force microscopy, Kelvin probe force microscopy, and scanning photoluminescence spectroscopy image the progressive postgrowth hydroxylation and hydration of atomically flat Al2O3(0001) under monolayer MoS2, manifested in large work function shifts (100 mV) due to charge transfer (>10(13) cm(-2)) from the substrate and changes in PL intensity, energy, and peak width. In contrast, trapped water between exfoliated graphene and Al2O3(0001) causes surface potential and doping changes one and two orders of magnitude smaller, respectively, and MoS2 grown on hydrophobic hexagonal boron nitride is unaffected by water exposure.
authors.forename: Changxi
authors.initials: C
authors.lastname: Zheng
authors.forename: Zai-Quan
authors.initials: ZQ
authors.lastname: Xu
authors.forename: Qianhui
authors.initials: Q
authors.lastname: Zhang
authors.forename: Mark T
authors.initials: MT
authors.lastname: Edmonds
authors.affiliation: ∥National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: ∥National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Taniguchi
authors.affiliation: ⊥Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People's Republic of China.
authors.forename: Qiaoliang
authors.initials: Q
authors.lastname: Bao
authors.forename: Michael S
authors.initials: MS
authors.lastname: Fuhrer
keywords: Molybdenum disulfide; boron nitride; doping; photoluminescence; substrate; transition metal dichalcogenides