Heterogeneity in the Small-Scale Deformation Behavior of Disordered Nanoparticle Packings
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- 作者：Joel A. Lefever ; Tevis D. B. Jacobs ; Qizhan Tam ; Jyo Lyn Hor ; Yun-Ru Huang ; Daeyeon Lee ; Robert W. Carpick
- 刊名：Nano Letters
- 出版年：2016
- 出版时间：April 13, 2016
- 年：2016
- 卷：16
- 期：4
- 页码：2455-2462
- 全文大小：440K
- 年卷期：0
- ISSN：1530-6992
文摘
Atomic force microscopy-based nanoindentation is used to image and probe the local mechanical properties of thin disordered nanoparticle packings. The probed region is limited to the size of a few particles, and an individual particle can be loaded and displaced to a fraction of a single particle radius. The results demonstrate heterogeneous mechanical response that is location-dependent. The weak locations may be analogous to the “soft spots” previously predicted in glasses and other disordered packings.