Covalent functionalization of monolayered transition metal dichalcogenides by phase engineering

2014 ◽  
Vol 7 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Damien Voiry ◽  
Anandarup Goswami ◽  
Rajesh Kappera ◽  
Cecilia de Carvalho Castro e Silva ◽  
Daniel Kaplan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Covalent Functionalization ◽  
Metal Dichalcogenides ◽  
Phase Engineering

ChemInform Abstract: Phase Engineering of Transition Metal Dichalcogenides

ChemInform ◽  
2015 ◽  
Vol 46 (27) ◽  
pp. no-no
Author(s):  
Damien Voiry ◽  
Aditya Mohite ◽  
Manish Chhowalla
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides ◽  
Phase Engineering

scholarly journals Strain Induced Phase Transition of WS2 by Local Dewetting of Au/Mica Film upon Annealing

Surfaces ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 1-8
Author(s):  
Tomasz Kosmala ◽  
Pawel Palczynski ◽  
Matteo Amati ◽  
Luca Gregoratti ◽  
Hikmet Sezen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Metal ◽  
Thermal Annealing ◽  
Tensile Strain ◽  
Structural Phase ◽  
Transition Metal Dichalcogenides ◽  
Proof Of Concept ◽  
Threshold Strain ◽  
Metal Dichalcogenides ◽  
Phase Engineering

Here, we present a proof-of-concept experiment where phase engineering at the nanoscale of 2D transition metal dichalcogenides (TMDC) flakes (from semiconducting 2H phase to metallic 1T phase) can be achieved by thermal annealing of a TMDC/Au/mica system. The local dewetting of Au particles and resulting tensile strain produced on the TMDC flakes, strongly bound to the Au surface through effective S-Au bonds, can induce a local structural phase transition. An important role is also played by the defects induced by the thermal annealing: when vacancies are present, the threshold strain needed to trigger the phase transition is significantly reduced. Scanning photoelectron microscopy (SPEM) was revealed to be the perfect tool to monitor the described phenomena.

Phase engineering of transition metal dichalcogenides

2015 ◽  
Vol 44 (9) ◽  
pp. 2702-2712 ◽  
Author(s):  
Damien Voiry ◽  
Aditya Mohite ◽  
Manish Chhowalla
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides ◽  
Phase Engineering

The co-existence of 2H, 1T and 1T′ phases in monolayered TMDs.

scholarly journals Mild Covalent Functionalization of Transition Metal Dichalcogenides with Maleimides: A “Click” Reaction for TMDCs

2018 ◽  
Author(s):  
Mariano Vera-Hidalgo ◽  
Emerson Giovanelli ◽  
Cristina Navío ◽  
Emilio Pérez
Keyword(s):  
Transition Metal ◽  
Chemical Modification ◽  
Biomedical Applications ◽  
Click Reaction ◽  
Transition Metal Dichalcogenides ◽  
Polymer Chemistry ◽  
Covalent Functionalization ◽  
Click Reactions ◽  
Mild Conditions ◽  
Metal Dichalcogenides

The physical properties of ultrathin transition metal dichalcogenides (2D-TMDCs) make them promising candidates as active nanomaterials for catalysis, optoelectronics, and biomedical applications. Chemical modification of TMDCs is expected to be key in modifying/adding new functions that will help make such promise a reality. We present a mild method for the modification of the basal planes of 2H-MoS<sub>2</sub> and WS<sub>2</sub>. We exploit the soft nucleophilicity of sulfur to react it with maleimide derivatives, achieving covalent functionalization of 2H-TMDCs under very mild conditions. Extensive characterization proves that the reaction occurs through Michael addition. Our results adapt one of the most popular “click” reactions in polymer chemistry and biochemistry to obtain a powerful tool for the chemical manipulation of TMDCs.

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