TY - JOUR
T1 - Electronic Changes in Molybdenum Dichalcogenides on Gold Surfaces
AU - Jernigan, Glenn G.
AU - Fonseca, Jose J.
AU - Cress, Cory D.
AU - Chubarov, Mikhail
AU - Choudhury, Tanushree H.
AU - Robinson, Jeremy T.
N1 - Funding Information:
This work is sponsored through the Office of Naval Research. MOCVD materials used in this study were provided by The Pennsylvania State University 2D Crystal Consortium—Materials Innovation Platform (2DCC-MIP) under NSF cooperative agreement DMR-1539916. This research was performed while J.J.F. held an NRC Research Associateship award at NRL.
Publisher Copyright:
© 2020 American Chemical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/19
Y1 - 2020/11/19
N2 - X-ray and ultraviolet photoelectron spectroscopy are performed on transition metal dichalcogenides (TMDs) MoS2, MoSe2, and MoTe2 monolayers on Au surfaces, to identify charge transfer processes and changes in structural phase upon annealing up to 500 °C. Although charge transfer does appear to occur as the spacing between the TMD monolayer and the Au surface decreases, we do not find spectroscopic evidence for the 2H to 1T phase change in exfoliated TMDs. However, we find the defect density of the TMDs influences the evolution of the X-ray photoelectron spectra during thermal treatment on Au. Both metal-organic chemical vapor deposition grown and helium-ion irradiated exfoliated-TMDs annealed on Au surfaces show shifts in their spectra that could be interpreted as a phase change, but are the result of TMD/Au hybridization, grain boundaries and defects interacting with the Au surface.
AB - X-ray and ultraviolet photoelectron spectroscopy are performed on transition metal dichalcogenides (TMDs) MoS2, MoSe2, and MoTe2 monolayers on Au surfaces, to identify charge transfer processes and changes in structural phase upon annealing up to 500 °C. Although charge transfer does appear to occur as the spacing between the TMD monolayer and the Au surface decreases, we do not find spectroscopic evidence for the 2H to 1T phase change in exfoliated TMDs. However, we find the defect density of the TMDs influences the evolution of the X-ray photoelectron spectra during thermal treatment on Au. Both metal-organic chemical vapor deposition grown and helium-ion irradiated exfoliated-TMDs annealed on Au surfaces show shifts in their spectra that could be interpreted as a phase change, but are the result of TMD/Au hybridization, grain boundaries and defects interacting with the Au surface.
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U2 - 10.1021/acs.jpcc.0c07813
DO - 10.1021/acs.jpcc.0c07813
M3 - Article
AN - SCOPUS:85096542225
SN - 1932-7447
VL - 124
SP - 25361
EP - 25368
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 46
ER -