期刊
ADVANCED MATERIALS
卷 31, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201807764
关键词
anisotropy; distorted octahedrals; electrochemical microcells; metastable phases; transition metal dichalcogenides
类别
资金
- MOE under AcRF Tier 2 in Singapore [MOE2015-T2-2-057, MOE2016-T2-2-103, MOE2017-T2-1-162]
- MOE under AcRF Tier 1 in Singapore [2017-T1-001-150, 2017-T1-002-119]
- NTU under Start-Up Grant in Singapore [M4081296.070.500000]
- ITC via Hong Kong Branch of National Precious Metals Material Engineering Research Center
- City University of Hong Kong
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.
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