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Temperature and laser-power dependent Raman spectra of MoS2/RGO hybrid and few-layered MoS2
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-11-19 , DOI: 10.1016/j.physb.2020.412693
Pengfei Shen , Xigui Yang , Mingrun Du , Huafang Zhang

Atomic thickness two-dimensional (2D) transition metal dichalcogenides (TMDs) have attracted intensive attention due to the potential application for next generation nano-electronic devices. The thermal properties of materials play a vital role in performance of nano-electronic devices. Here, few-layered MoS2/reduced graphene oxide (RGO) heterostructure with intimate two-dimensional heterointerfaces was successfully synthesized via hydrothermal method. We report for the first time the temperature-dependence Raman vibration of few-layered MoS2/RGO hybrid. The temperature coefficient of A1g modes in few-layered MoS2 solely and MoS2/RGO hybrid are −0.0141 and −0.0154 cm−1/K, respectively. The Raman vibration of E12g and A1g modes with laser powder increasing in the two samples were also measured. The qualitative analysis and comparison of the two samples suggested that the few-layer MoS2 in MoS2/RGO hybrid possesses higher thermal conductivity than few-layer MoS2 solely.



中文翻译:

MoS 2 / RGO杂化和多层MoS 2的温度和激光功率相关拉曼光谱

由于下一代纳米电子器件的潜在应用,原子厚度二维(2D)过渡金属二硫化二氢(TMD)引起了广泛的关注。材料的热性能在纳米电子器件的性能中起着至关重要的作用。在此,通过水热法成功地合成了具有紧密二维异质界面的少层MoS 2 /还原氧化石墨烯(RGO)异质结构。我们首次报道了几层MoS 2 / RGO杂化体的温度依赖性拉曼振动。单层MoS 2和MoS 2 / RGO杂化层中A 1g模式的温度系数分别为-0.0141和-0.0154 cm -1/ K。还测量了两个样品中E 1 2gA 1g模式随激光粉末增加的拉曼振动。两个样品的定性分析和比较建议少层的MoS 2中的MoS 2 / RGO混合比具有少层的MoS更高的导热率2只。

更新日期:2021-01-18
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