压阻效应
各向异性
材料科学
拉曼光谱
纳米片
标度系数
拉伤
凝聚态物理
密度泛函理论
复合材料
纳米技术
光学
计算化学
化学
物理
制作
内科学
病理
替代医学
医学
作者
Jing‐Kai Qin,Hai‐Lin Sun,Tong Su,Weiwei Zhao,Liang Zhen,Yang Chai,Cheng‐Yan Xu
摘要
Quasi-one-dimensional layered TiS3 nanosheets possess highly anisotropic physical properties. Herein, we reported the anisotropic strain response of Raman and the piezoresistance effect in layered TiS3 nanosheets. An attractive Grüneisen parameter (γm) of 5.82 was achieved for AgIII mode in the b-axis strained TiS3 nanosheet, while a negligible value of γm was obtained when the strain is applied along the a-axis direction. We also revealed the opposite piezoresistive effect with strains applied along the two principal axes, demonstrating a gauge factor ratio of approximately −1:3.2. The giant anisotropy is attributed to the strain modulated bandgap, which was further confirmed by density functional theory calculations.
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