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

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 OBrien

doi:10.1021/acsami.5b06055

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

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 OBrien

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Pages (from-to)	20829-20834
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	37
DOIs	https://doi.org/10.1021/acsami.5b06055
State	Published - Sep 23 2015

Keywords

antiwear films
in situ electron microscopy
transition metal dichalcogenides
tribology

ASJC Scopus subject areas

General Materials Science

Online availability

10.1021/acsami.5b06055

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title = "Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: An in Situ TEM Study",

abstract = "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.",

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T2 - An in Situ TEM Study

AU - Tedstone, Aleksander A.

AU - Lewis, David J.

AU - Hao, Rui

AU - Mao, Shi Min

AU - Bellon, Pascal

AU - Averback, Robert S.

AU - Warrens, Christopher P.

AU - West, Kevin R.

AU - Howard, Philip

AU - Gaemers, Sander

AU - Dillon, Shen J.

AU - OBrien, Paul

PY - 2015/9/23

Y1 - 2015/9/23

N2 - 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.

AB - 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.

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KW - in situ electron microscopy

KW - transition metal dichalcogenides

KW - tribology

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

Abstract

Keywords

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