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通过微观纳米机械测量方法对金纳米接触器的扬模量局部变化的估计

Jiaming Liu¹, Jiaqi Zhang^2,3, Kohei Aso¹

¹School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Nomi, Japan.

|October 7, 2024

概括

研究人员开发了一种新的方法来测量纳米级材料的局部模量,使用微观纳米机械测量 (MNMM) 和传输电子显微镜 (TEM). 该技术揭示了尺寸依赖的机械性能,适用于各种纳米材料和异质合金.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
机械工程机械工程

背景情况:

纳米级材料由于其单晶领域而表现出尺寸和取决于方向的机械性能.
测量纳米机械性能的现有方法在一般适用性方面存在局限性.
微观纳米机械测量 (MNMM) 与传输电子显微镜 (TEM) 结合以前用于研究纳米接触物 (NCs).

研究的目的:

开发一种新的分析方法,用于直接检索纳米材料的局部模量.
克服以前模型的局限性,这些模型并不适用于所有纳米材料.
在纳米接触器内的各种位置研究局部模量的大小依赖性.

主要方法:

使用微观纳米机械测量 (MNMM) 来拉伸纳米接触器 (NC).
使用传输电子显微镜 (TEM) 来观察原子结构并测量格子间距.
开发了一种新的分析方法,用于从初始格子间距和拉伸过程中的位移计算局部模量.

主要成果:

这种新方法成功地检索了当地的黄金[111]纳米接触的模量.
观察到Young的模块的大小依赖,与以前的发现一致.
证明了该方法在多个位置同时揭示机械性能的能力.

结论:

拟议的分析方法提供了一种直接的方式来确定纳米材料的局部模量.
这种技术更为通用,适用于更广泛的材料,包括结构异质的材料,如高合金.
这些发现促进了对纳米级机械行为和材料特征的理解.

关键词:

扬格的模块是这样的:频率调制方法频率调制方法黄金纳米接触器的使用方法在现场的TEM.

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