Temperature dependent Raman spectroscopy of chemically derived few layer MoS2 and WS2 nanosheets

被引：204
|
作者：
Thripuranthaka, M. [1 ]
Kashid, Ranjit V. [1 ]
Rout, Chandra Sekhar [2 ]
Late, Dattatray J. [1 ]
机构：
[1] Natl Chem Lab, CSIR, Phys & Mat Chem Div, Pune 411008, Maharashtra, India
[2] Indian Inst Technol, Sch Basic Sci, Bhubaneswar 751013, Orissa, India
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 08期
关键词：
THERMAL-CONDUCTIVITY; GRAPHENE; BEHAVIOR; GAS;
D O I：
10.1063/1.4866782
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have systematically investigated the temperature dependent Raman spectroscopy behavior of a few layered MoS2 and WS2 nanosheets synthesized using simple hydrothermal method. Our result reveals A(1g) and E-2g(1) modes soften as temperature increases from 77 K to 623 K. This behavior can be explained in terms of a double resonance process which is active in single-and few layer thick nanosheets. The frequency shifts and peak broadening can provide unambiguous, nondestructive, and accurate information of a few layered MoS2 and WS2. This mechanism can also be applicable in characterizing the structural, optical, electronic, and vibrational properties of other emerging layered materials. (c) 2014 AIP Publishing LLC.
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页数：5
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