Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers

Single- and few-layered transition metal dichalcogenides, such as MoS2 and WS2, are emerging two-dimensional materials exhibiting numerous and unusual physico-chemical properties that could be advantageous in the fabrication of unprecedented optoelectronic devices. Here we report a novel and alterna...

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Main Authors:	Zhong Lin, Michael T. Thee, Ana Laura Elías, Simin Feng, Chanjing Zhou, Kazunori Fujisawa, Néstor Perea-López, Victor Carozo, Humberto Terrones, Mauricio Terrones
Format:	Article
Language:	English
Published:	AIP Publishing LLC 2014-09-01
Series:	APL Materials
Online Access:	http://dx.doi.org/10.1063/1.4895469

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spelling	doaj-39d4caa5f02b4b99ba37935801a06c2a2020-11-24T21:29:47ZengAIP Publishing LLCAPL Materials2166-532X2014-09-0129092514092514-810.1063/1.4895469018492APMFacile synthesis of MoS2 and MoxW1-xS2 triangular monolayersZhong Lin0Michael T. Thee1Ana Laura Elías2Simin Feng3Chanjing Zhou4Kazunori Fujisawa5Néstor Perea-López6Victor Carozo7Humberto Terrones8Mauricio Terrones9Department of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USADepartment of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 122180, USADepartment of Physics and Center for 2Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, USASingle- and few-layered transition metal dichalcogenides, such as MoS2 and WS2, are emerging two-dimensional materials exhibiting numerous and unusual physico-chemical properties that could be advantageous in the fabrication of unprecedented optoelectronic devices. Here we report a novel and alternative route to synthesize triangular monocrystals of MoS2 and MoxW1-xS2 by annealing MoS2 and MoS2/WO3 precursors, respectively, in the presence of sulfur vapor. In particular, the MoxW1-xS2 triangular monolayers show gradual concentration profiles of W and Mo whereby Mo concentrates in the islands’ center and W is more abundant on the outskirts of the triangular monocrystals. These observations were confirmed by atomic force microscopy, and high-resolution transmission electron microscopy, as well as Raman and photoluminescence spectroscopy. The presence of tunable PL signals depending on the MoxW1-xS2 stoichiometries in 2D monocrystals opens up a wide range of applications in electronics and optoelectronics.http://dx.doi.org/10.1063/1.4895469
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zhong Lin Michael T. Thee Ana Laura Elías Simin Feng Chanjing Zhou Kazunori Fujisawa Néstor Perea-López Victor Carozo Humberto Terrones Mauricio Terrones
spellingShingle	Zhong Lin Michael T. Thee Ana Laura Elías Simin Feng Chanjing Zhou Kazunori Fujisawa Néstor Perea-López Victor Carozo Humberto Terrones Mauricio Terrones Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers APL Materials
author_facet	Zhong Lin Michael T. Thee Ana Laura Elías Simin Feng Chanjing Zhou Kazunori Fujisawa Néstor Perea-López Victor Carozo Humberto Terrones Mauricio Terrones
author_sort	Zhong Lin
title	Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers
title_short	Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers
title_full	Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers
title_fullStr	Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers
title_full_unstemmed	Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers
title_sort	facile synthesis of mos2 and moxw1-xs2 triangular monolayers
publisher	AIP Publishing LLC
series	APL Materials
issn	2166-532X
publishDate	2014-09-01
description	Single- and few-layered transition metal dichalcogenides, such as MoS2 and WS2, are emerging two-dimensional materials exhibiting numerous and unusual physico-chemical properties that could be advantageous in the fabrication of unprecedented optoelectronic devices. Here we report a novel and alternative route to synthesize triangular monocrystals of MoS2 and MoxW1-xS2 by annealing MoS2 and MoS2/WO3 precursors, respectively, in the presence of sulfur vapor. In particular, the MoxW1-xS2 triangular monolayers show gradual concentration profiles of W and Mo whereby Mo concentrates in the islands’ center and W is more abundant on the outskirts of the triangular monocrystals. These observations were confirmed by atomic force microscopy, and high-resolution transmission electron microscopy, as well as Raman and photoluminescence spectroscopy. The presence of tunable PL signals depending on the MoxW1-xS2 stoichiometries in 2D monocrystals opens up a wide range of applications in electronics and optoelectronics.
url	http://dx.doi.org/10.1063/1.4895469
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Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers

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