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Atomic Defects Influenced Mechanics of II-VI Nanocrystals

Ghosh, Moumita and Ghosh, Siddharth and Attariani, Hamed and Momeni, Kasra and Seibt, Michael and Rao, Gowravaram Mohan (2016) Atomic Defects Influenced Mechanics of II-VI Nanocrystals. In: NANO LETTERS, 16 (10). pp. 5969-5974.

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Official URL: http://dx.doi.org/10.1021/acs.nanolett.6b00571


Mechanical properties of nano crystals are influenced by atomic defects. Here, we demonstrate the effect.of planar defects on the mechanics of ZnO nanorods using atomic force microscopy, high-resolution transmission electron microscopy, and large-scale atomistic simulation. We study two different conditionally grown single nanorods. One contains extended Irtype stacking fault (SF) and another is defect free. The SF containing nanorods show buckling behaviors with reduced critical loading, whereas the other kinds show linear elastic behavior. We also studied the size dependence of elastic modulus and yield strength. The elastic modulus in both nanorods is inversely proportional to their size. Similar trend is observed for yield strength in the SF containing nanorods; however, the opposite is observed in the SF-free nanorods. This first experimental and theoretical study will guide toward the developinent of reliable electromechanical devices.

Item Type: Journal Article
Publication: NANO LETTERS
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 03 Dec 2016 06:52
Last Modified: 03 Dec 2016 06:52
URI: http://eprints.iisc.ac.in/id/eprint/55341

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