Details

Autor(en) / Beteiligte

• Lin, Zhong
• Thee, Michael T.
• Elías, Ana Laura
• Feng, Simin
• Zhou, Chanjing
• Fujisawa, Kazunori
• Perea-López, Néstor
• Carozo, Victor
• Terrones, Humberto
• Terrones, Mauricio

Titel

Facile synthesis of MoS2 and MoxW1-xS2 triangular monolayers

Ist Teil von

• APL materials, 2014-09, Vol.2 (9), p.092514-092514-8

Ort / Verlag

AIP Publishing LLC

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• 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.