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Millisecond Conversion of Metastable 2D Materials by Flash Joule Heating

Journal Article · · ACS Nano

Controllable phase engineering is vital for precisely tailoring material properties since different phase structures have various electronic states and atomic arrangements. Rapid synthesis of thermodynamically metastable materials, especially two-dimensional metastable materials, with high efficiency and low cost remains a large challenge. Here we report flash Joule heating (FJH) as an electrothermal method to achieve the bulk conversion of transition metal dichalcogenides, MoS2 and WS2, from 2H phases to 1T phases in milliseconds. The conversions can reach up to 76% of flash MoS2 using tungsten powder as conductive additive. Different degrees of phase conversion can be realized by controlling the FJH conditions, such as reaction duration and additives, which allows the study of ratio-dependent properties. First-principles calculations confirm that structural processes associated with the FJH, such as vacancy formation and charge accumulation, result in stabilization of the 1T phases. Furthermore, FJH offers rapid access to bulk quantities of the hitherto hard-to-access 1T phases, a promising method for further fundamental research and diverse applications of metastable phases.

Research Organization:
Rice Univ., Houston, TX (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012547; FE0031794
OSTI ID:
1798512
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 1 Vol. 15; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (44)

Rational Design of MXene/1T-2H MoS 2 -C Nanohybrids for High-Performance Lithium-Sulfur Batteries journal March 2018
Stable Metallic 1T-WS 2 Nanoribbons Intercalated with Ammonia Ions: The Correlation between Structure and Electrical/Optical Properties journal July 2015
Targeted Synthesis of 2H- and 1T-Phase MoS 2 Monolayers for Catalytic Hydrogen Evolution journal September 2016
High Phase Purity of Large‐Sized 1T′‐MoS 2 Monolayers with 2D Superconductivity journal March 2019
Laser‐Induced Silicon Oxide for Anode‐Free Lithium Metal Batteries journal July 2020
Ultrastable In-Plane 1T-2H MoS 2 Heterostructures for Enhanced Hydrogen Evolution Reaction journal July 2018
Crystal‐Field Tuning of Photoluminescence in Two‐Dimensional Materials with Embedded Lanthanide Ions journal January 2018
Electron Diffraction Study of Intercalation Compounds Derived from 1T-MoS2 journal May 1999
Phase engineering of two-dimensional transition metal dichalcogenides journal February 2019
Colloidal synthesis of 1T' phase dominated WS2 towards endurable electrocatalysis journal August 2018
Electron-Doped 1T-MoS 2 via Interface Engineering for Enhanced Electrocatalytic Hydrogen Evolution journal May 2017
Charge Mediated Semiconducting-to-Metallic Phase Transition in Molybdenum Disulfide Monolayer and Hydrogen Evolution Reaction in New 1T′ Phase journal June 2015
Mechanisms of Semiconducting 2H to Metallic 1T Phase Transition in Two-dimensional MoS 2 Nanosheets journal November 2018
Probing the Dynamics of the Metallic-to-Semiconducting Structural Phase Transformation in MoS 2 Crystals journal July 2015
Fast and Efficient Preparation of Exfoliated 2H MoS 2 Nanosheets by Sonication-Assisted Lithium Intercalation and Infrared Laser-Induced 1T to 2H Phase Reversion journal August 2015
Observation of Gap Opening in 1T′ Phase MoS 2 Nanocrystals journal July 2018
Flash Graphene Morphologies journal September 2020
Flash Graphene from Plastic Waste journal October 2020
Temperature- and Phase-Dependent Phonon Renormalization in 1T′-MoS 2 journal April 2018
Highly Ambient-Stable 1T-MoS 2 and 1T-WS 2 by Hydrothermal Synthesis under High Magnetic Fields journal January 2019
Exfoliated MoS 2 Nanocomposite as an Anode Material for Lithium Ion Batteries journal August 2010
Enhanced Hydrogen Evolution Catalysis from Chemically Exfoliated Metallic MoS 2 Nanosheets journal May 2013
Atomic Mechanism of Dynamic Electrochemical Lithiation Processes of MoS 2 Nanosheets journal April 2014
Argon Plasma Induced Phase Transition in Monolayer MoS 2 journal July 2017
Coherent Atomic and Electronic Heterostructures of Single-Layer MoS2 journal July 2012
Atomic-Scale Clarification of Structural Transition of MoS 2 upon Sodium Intercalation journal November 2014
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets journal April 2013
Twinned growth behaviour of two-dimensional materials journal December 2016
Structural phase transitions in two-dimensional Mo- and W-dichalcogenide monolayers journal July 2014
Exploring atomic defects in molybdenum disulphide monolayers journal February 2015
Atomic mechanism of the semiconducting-to-metallic phase transition in single-layered MoS2 journal April 2014
Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials journal March 2015
High phase-purity 1T′-MoS2- and 1T′-MoSe2-layered crystals journal April 2018
High temperature shockwave stabilized single atoms journal August 2019
Gram-scale bottom-up flash graphene synthesis journal January 2020
Stable and scalable 1T MoS2 with low temperature-coefficient of resistance journal August 2018
Enhanced hydrogen evolution catalysis from osmotically swollen ammoniated MoS 2 journal January 2015
Enhanced hydrogen evolution catalysis in MoS 2 nanosheets by incorporation of a metal phase journal January 2015
Phase engineering of a multiphasic 1T/2H MoS 2 catalyst for highly efficient hydrogen evolution journal January 2017
Observation of superconductivity in 1T′-MoS 2 nanosheets journal January 2017
Electron-injection driven phase transition in two-dimensional transition metal dichalcogenides journal January 2020
Phase patterning for ohmic homojunction contact in MoTe2 journal August 2015
Carbothermal shock synthesis of high-entropy-alloy nanoparticles journal March 2018
A general method to synthesize and sinter bulk ceramics in seconds journal April 2020