Open AccessHighly crystalline ReSe 2 atomic layers synthesized by chemical vapor transport
Author(s) -
Xing Lei,
Yan Xingxu,
Zheng Jingying,
Xu Guanchen,
Lu Zhixing,
Liu Lina,
Wang Jinghui,
Wang Peng,
Pan Xiaoqing,
Jiao Liying
Publication year - 2019
Publication title -
infomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3165
DOI - 10.1002/inf2.12041
Subject(s) - monolayer , materials science , raman spectroscopy , anisotropy , diselenide , tungsten diselenide , nanotechnology , transmission electron microscopy , chemical engineering , chemistry , optics , transition metal , catalysis , metallurgy , organic chemistry , physics , selenium , engineering
Two‐dimensional (2D) anisotropic rhenium diselenide (ReSe 2 ) has attracted lots of attention due to its promising applications in electronics and optoelectronics. However, controlled synthesis of high quality ultrathin ReSe 2 remains as a challenge. Here we developed an approach for synthesizing high quality 2D ReSe 2 flakes with a thickness down to monolayer by chemical vapor transport (CVT) through carefully tuning the growth kinetics. The atomic structures and anisotropy of the obtained ReSe 2 flakes were intensively characterized with scanning transmission electron microscope and angle‐resolved polarized Raman spectroscopy. Field‐effect transistors fabricated on the CVT‐grown ReSe 2 flakes showed n‐type semiconducting behavior with an on/off current ratio of 10 5 and a mobility up to ∼5 cm 2 V −1 s −1 , which is comparable to mechanically exfoliated flakes and is obvious higher than the samples synthesized with other approaches. This study not only make high quality 2D ReSe 2 easily accessible for both fundamental and application explorations but also sheds new lights on the chemical synthesis of other anisotropic 2D materials.