In-Plane Anisotropic Properties of 1T′-MoS2 Layers

被引：81

作者：

Nam, Gwang-Hyeon ^{[1
]}

He, Qiyuan ^{[1
]}

Wang, Xingzhi ^{[2
]}

Yu, Yifu ^{[3
,4
,5
]}

Chen, Junze ^{[1
]}

Zhang, Kang ^{[6
]}

Yang, Zhenzhong ^{[7
]}

Hu, Dianyi ^{[1
]}

Lai, Zhuangchai ^{[1
]}

Li, Bing ^{[8
]}

Xiong, Qihua ^{[2
]}

Zhang, Qing ^{[6
]}

Gu, Lin ^{[7
]}

Zhang, Hua ^{[1
,9
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Ctr Programmable Mat, 50 Nanyang Ave, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[3] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China

[4] Tianjin Univ, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China

[5] Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China

[6] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[7] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[8] ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore

[9] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong, Peoples R China

来源：

ADVANCED MATERIALS | 2019年 / 31卷 / 21期

关键词：

anisotropy; distorted octahedrals; electrochemical microcells; metastable phases; transition metal dichalcogenides; CATALYTIC-ACTIVITY; PHASE-TRANSITION; MOS2; NANOSHEETS; MONOLAYER MOS2; EVOLUTION; SYMMETRY; SPECTROSCOPY; TRANSPORT; FLAKES; MOTE2;

D O I：

10.1002/adma.201807764

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Crystal phases play a key role in determining the physicochemical properties of a material. To date, many phases of transition metal dichalcogenides have been discovered, such as octahedral (1T), distorted octahedral (1T '), and trigonal prismatic (2H) phases. Among these, the 1T ' phase offers unique properties and advantages in various applications. Moreover, the 1T ' phase consists of unique zigzag chains of the transition metals, giving rise to interesting in-plane anisotropic properties. Herein, the in-plane optical and electrical anisotropies of metastable 1T '-MoS2 layers are investigated by the angle-resolved Raman spectroscopy and electrical measurements, respectively. The deconvolution of J(1) and J(2) peaks in the angle-resolved Raman spectra is a key characteristic of high-quality 1T '-MoS2 crystal. Moreover, it is found that its electrocatalytic performance may be affected by the crystal orientation of anisotropic material due to the anisotropic charge transport.

引用

页数：6

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