title: Properties of individual dopant atoms in single-layer MoS2: atomic structure, migration, and enhanced reactivity.
abstract: Single-layered MoS2 doped with Re (n-type) and Au (p-type) are investigated by in situ scanning transmission electron microscopy. Re atoms substituting Mo sites enhance the local chemical affinity, evidenced by agglomeration of other dopant/impurity atoms. Au atoms exist as adatoms and show larger mobility under the electron beam. These behaviors are consistent with density functional theory calculations.
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8565, Japan.
authors.forename: Yung-Chang
authors.initials: YC
authors.lastname: Lin
authors.forename: Dumitru O
authors.initials: DO
authors.lastname: Dumcenco
authors.forename: Hannu-Pekka
authors.initials: HP
authors.lastname: Komsa
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Niimi
authors.forename: Arkady V
authors.initials: AV
authors.lastname: Krasheninnikov
authors.forename: Ying-Sheng
authors.initials: YS
authors.lastname: Huang
authors.forename: Kazu
authors.initials: K
authors.lastname: Suenaga
keywords: MoS2; STEM; adatoms; dopants; two-dimensional materials