skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In situ edge engineering in two-dimensional transition metal dichalcogenides

Journal Article · · Nature Communications

Exerting synthetic control over the edge structure and chemistry of two-dimensional (2D) materials is of critical importance to direct the magnetic, optical, electrical, and catalytic properties for specific applications. Here in this study, we directly image the edge evolution of pores in Mo1-xW xSe2 monolayers via atomic-resolution in situ scanning transmission electron microscopy (STEM) and demonstrate that these edges can be structurally transformed to theoretically predicted metastable atomic configurations by thermal and chemical driving forces. Density functional theory calculations and ab initio molecular dynamics simulations explain the observed thermally induced structural evolution and exceptional stability of the four most commonly observed edges based on changing chemical potential during thermal annealing. Finally, the coupling of modeling and in situ STEM imaging in changing chemical environments demonstrated here provides a pathway for the predictive and controlled atomic scale manipulation of matter for the directed synthesis of edge configurations in Mo1-x W x Se2 to achieve desired functionality.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1474652
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 88 works
Citation information provided by
Web of Science

References (54)

Extraordinary Room-Temperature Photoluminescence in Triangular WS 2 Monolayers journal December 2012
Atom-by-atom structural and chemical analysis by annular dark-field electron microscopy journal March 2010
Electrical Breakdown of Suspended Mono- and Few-Layer Tungsten Disulfide via Sulfur Depletion Identified by in Situ Atomic Imaging journal August 2017
Generalized Gradient Approximation Made Simple journal October 1996
Vapour phase growth and grain boundary structure of molybdenum disulphide atomic layers journal June 2013
Edge Nonlinear Optics on a MoS2 Atomic Monolayer journal May 2014
Projector augmented-wave method journal December 1994
Large Area Synthesis of 1D-MoSe 2 Using Molecular Beam Epitaxy journal January 2017
Mo-Terminated Edge Reconstructions in Nanoporous Molybdenum Disulfide Film journal December 2017
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
One-Dimensional Metallic Edge States in MoS 2 journal October 2001
Controlled Growth of 1D MoSe 2 Nanoribbons with Spatially Modulated Edge States journal January 2017
Anomalous Strength Characteristics of Tilt Grain Boundaries in Graphene journal November 2010
Edge Structural Stability and Kinetics of Graphene Chemical Vapor Deposition Growth journal March 2012
Charge density wave order in 1D mirror twin boundaries of single-layer MoSe2 journal April 2016
Tuning the Magnetic Properties of MoS 2 Single Nanolayers by 3d Metals Edge Doping journal May 2016
Temperature Dependence of the Reconstruction of Zigzag Edges in Graphene journal April 2015
In Situ Detection of Active Edge Sites in Single-Layer MoS 2 Catalysts journal July 2015
Flexible metallic nanowires with self-adaptive contacts to semiconducting transition-metal dichalcogenide monolayers journal April 2014
Isoelectronic Tungsten Doping in Monolayer MoSe 2 for Carrier Type Modulation journal July 2016
The influence of edge structure on the electronic properties of graphene quantum dots and nanoribbons journal February 2009
In situ observation of graphene sublimation and multi-layer edge reconstructions journal June 2009
Room-temperature magnetic order on zigzag edges of narrow graphene nanoribbons journal October 2014
Advanced Computing in Electron Microscopy book January 1998
MoS 2 Nanoribbons: High Stability and Unusual Electronic and Magnetic Properties journal December 2008
Equilibrium at the edge and atomistic mechanisms of graphene growth journal September 2012
Suppression of Defects and Deep Levels Using Isoelectronic Tungsten Substitution in Monolayer MoSe 2 journal October 2016
Atomically perfect torn graphene edges and their reversible reconstruction journal November 2013
Edge-Controlled Growth and Etching of Two-Dimensional GaSe Monolayers journal December 2016
The valley Hall effect in MoS2 transistors journal June 2014
Edge-controlled growth and kinetics of single-crystal graphene domains by chemical vapor deposition journal December 2013
Identification of Active Edge Sites for Electrochemical H2 Evolution from MoS2 Nanocatalysts journal July 2007
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Electromagnetic interference shielding with 2D transition metal carbides (MXenes) journal September 2016
Single-layer MoS2 transistors journal January 2011
Size-dependent structure of MoS2 nanocrystals journal January 2007
The nature of strength enhancement and weakening by pentagon–heptagon defects in graphene journal July 2012
Two-dimensional gas of massless Dirac fermions in graphene journal November 2005
Graphene Edge from Armchair to Zigzag: The Origins of Nanotube Chirality? journal December 2010
Oscillating edge states in one-dimensional MoS2 nanowires journal October 2016
Angle resolved photoemission spectroscopy reveals spin charge separation in metallic MoSe2 grain boundary journal February 2017
In situ observation of step-edge in-plane growth of graphene in a STEM journal June 2014
Amorphization-induced surface electronic states modulation of cobaltous oxide nanosheets for lithium-sulfur batteries journal May 2021
High-resolution X-ray luminescence extension imaging journal February 2021
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect journal February 2020
Advanced Computing in Electron Microscopy book January 2020
Flexible Metallic Nanowires with Self-Adaptive Contacts to Semiconducting Transition-Metal Dichalcogenide Monolayers journal August 2014
One-Dimensional Metallic Edge States in MoS2 text January 2001
Vapor Phase Growth and Grain Boundary Structure of Molybdenum Disulfide Atomic Layers text January 2013
Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons text January 2014
In Situ Detection of Active Edge Sites in Single-Layer MoS$_2$ Catalysts text January 2015
Few-layer bismuth selenide cathode for low-temperature quasi-solid-state aqueous zinc metal batteries journal February 2022
Observation of charge density wave order in 1D mirror twin boundaries of single-layer MoSe2 text January 2016
Two-Dimensional Gas of Massless Dirac Fermions in Graphene text January 2005

Cited By (8)

Atomic Insight into Thermolysis‐Driven Growth of 2D MoS 2 journal May 2019
Atomic‐Scale Fabrication of In‐Plane Heterojunctions of Few‐Layer MoS 2 via In Situ Scanning Transmission Electron Microscopy journal December 2019
In Situ N‐Doped Graphene and Mo Nanoribbon Formation from Mo 2 Ti 2 C 3 MXene Monolayers journal January 2020
A roadmap for electronic grade 2D materials journal January 2019
Experimental progress on layered topological semimetals journal April 2019
Applications of Nanosheets in Frontier Cellular Research journal July 2018
Experimental Progress on Layered Topological Semimetals text January 2019
Atomic structure and defect dynamics of monolayer lead iodide nanodisks with epitaxial alignment on graphene journal February 2020