High elasticity and strength of ultra-thin metallic transition metal dichalcogenides

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buir.contributor.authorSheraz, Ali
buir.contributor.authorMehmood, Naveed
buir.contributor.authorDurgun, Engin
buir.contributor.authorKasırga, Talip Serkan
buir.contributor.orcidSheraz, Ali|0000-0001-6772-9048
buir.contributor.orcidMehmood, Naveed|0000-0002-1278-5875
buir.contributor.orcidDurgun, Engin|0000-0002-0639-5862
buir.contributor.orcidKasırga, Talip Serkan|0000-0003-3510-5059
dc.citation.epage3899en_US
dc.citation.issueNumber13en_US
dc.citation.spage3894en_US
dc.citation.volumeNumber3en_US
dc.contributor.authorSheraz, Ali
dc.contributor.authorMehmood, Naveed
dc.contributor.authorÇiçek, M. M.
dc.contributor.authorErgün, İ.
dc.contributor.authorRasouli, H. R.
dc.contributor.authorDurgun, Engin
dc.contributor.authorKasırga, Talip Serkan
dc.date.accessioned2022-02-10T11:51:53Z
dc.date.available2022-02-10T11:51:53Z
dc.date.issued2021-05-24
dc.departmentDepartment of Physicsen_US
dc.description.abstractMechanical properties of transition metal dichalcogenides (TMDCs) are relevant to their prospective applications in flexible electronics. So far, the focus has been on the semiconducting TMDCs, mostly MoX2 and WX2 (X = S, Se) due to their potential in optoelectronics. A comprehensive understanding of the elastic properties of metallic TMDCs is needed to complement the semiconducting TMDCs in flexible optoelectronics. Thus, mechanical testing of metallic TMDCs is pertinent to the realization of the applications. Here, we report on the atomic force microscopy-based nano-indentation measurements on ultra-thin 2H-TaS2 crystals to elucidate the stretching and breaking of the metallic TMDCs. We explored the elastic properties of 2H-TaS2 at different thicknesses ranging from 3.5 nm to 12.6 nm and find that the Young's modulus is independent of the thickness at a value of 85.9 ± 10.6 GPa, which is lower than the semiconducting TMDCs reported so far. We determined the breaking strength as 5.07 ± 0.10 GPa which is 6% of the Young's modulus. This value is comparable to that of other TMDCs. We used ab initio calculations to provide an insight into the high elasticity measured in 2H-TaS2. We also performed measurements on a small number of 1T-TaTe2, 3R-NbS2 and 1T-NbTe2 samples and extended our ab initio calculations to these materials to gain a deeper understanding on the elastic and breaking properties of metallic TMDCs. This work illustrates that the studied metallic TMDCs are suitable candidates to be used as additives in composites as functional and structural elements and for flexible conductive electronic devices.en_US
dc.identifier.doi10.1039/d1na00225ben_US
dc.identifier.eissn2516-0230
dc.identifier.urihttp://hdl.handle.net/11693/77230
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttps://doi.org/10.1039/d1na00225ben_US
dc.source.titleNanoscale Advancesen_US
dc.titleHigh elasticity and strength of ultra-thin metallic transition metal dichalcogenidesen_US
dc.typeArticleen_US

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Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)