Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: An in Situ TEM Study

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• 作者：Aleksander A. Tedstone ; David J. Lewis ; Rui Hao ; Shi-Min Mao ; Pascal Bellon ; Robert S. Averback ; Christopher P. Warrens ; Kevin R. West ; Philip Howard ; Sander Gaemers ; Shen J. Dillon ; Paul O鈥橞rien
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 23, 2015
• 年：2015
• 卷：7
• 期：37
• 页码：20829-20834
• 全文大小：326K
• ISSN：1944-8252

文摘

Direct observations on nanopillars composed of molybdenum disulfide (MoS₂) and chromium-doped MoS₂ and their response to compressive stress have been made. Time-resolved transmission electron microscopy (TEM) during compression of the submicrometer diameter pillars of MoS₂- and Cr-doped MoS₂ (Cr: 0, 10, and 50 at %) allow the deformation process of the material to be observed and can be directly correlated with mechanical response to applied load. The addition of chromium to the MoS₂ changed the failure mode from plastic deformation to catastrophic brittle fracture, an effect that was more pronounced as chromium content increased.