拉曼光谱
材料科学
声子
热导率
非谐性
分析化学(期刊)
热膨胀
各向异性
凝聚态物理
分子振动
化学
光学
复合材料
物理
色谱法
作者
Mengen Zhang,Xinyi Xue,Xueqin Cao,Zhen Lei,Ruowei Wu,Yuanyuan Huang,Xinlong Xu
摘要
We have investigated the thermal conductivity and vibration properties of TiS3 nanoribbon via micro-Raman spectroscopy. Based on the Raman spectra, the calculated temperature coefficients of the four Ag1 modes of the TiS3 nanoribbon sample are −0.0140, −0.0136, −0.0179, and −0.0172 cm−1 K−1, respectively, which are higher than that of traditional nanomaterials graphene and MoS2. The Raman frequency shift of TiS3 provides a powerful non-contact method to determine its local temperature rise, which is caused by the anharmonic coupling of phonons. From temperature coefficient and power coefficient values, the in-plane thermal conductivity of the TiS3 supported by SiO2/Si substrate has been calculated to be 187.2 ± 28.9 W/mK with weak anisotropy due to the substrate and size effects. This work paves a way to understand the heat conduction characteristics of transition metal trisulfide.
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