Strain tolerance of two-dimensional crystal growth on curved surfaces

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dc.citation.articleNumbereaav4028
dc.citation.issueNumber5
dc.citation.journalTitleScience Advances
dc.citation.volumeNumber5
dc.contributor.authorWang, Kai
dc.contributor.authorPuretzky, Alexander A.
dc.contributor.authorHu, Zhili
dc.contributor.authorSrijanto, Bernadeta R.
dc.contributor.authorLi, Xufan
dc.contributor.authorGupta, Nitant
dc.contributor.authorYu, Henry
dc.contributor.authorTian, Mengkun
dc.contributor.authorMahjouri-Samani, Masoud
dc.contributor.authorGao, Xiang
dc.contributor.authorOyedele, Akinola
dc.contributor.authorRouleau, Christopher M.
dc.contributor.authorEres, Gyula
dc.contributor.authorYakobson, Boris I.
dc.contributor.authorYoon, Mina
dc.contributor.authorXiao, Kai
dc.contributor.authorGeohegan, David B.
dc.date.accessioned2019-11-22T16:19:54Z
dc.date.available2019-11-22T16:19:54Z
dc.date.issued2019
dc.description.abstractTwo-dimensional (2D) crystal growth over substrate features is fundamentally guided by the Gauss-Bonnet theorem, which mandates that rigid, planar crystals cannot conform to surfaces with nonzero Gaussian curvature. Here, we reveal how topographic curvature of lithographically designed substrate features govern the strain and growth dynamics of triangular WS2 monolayer single crystals. Single crystals grow conformally without strain over deep trenches and other features with zero Gaussian curvature; however, features with nonzero Gaussian curvature can easily impart sufficient strain to initiate grain boundaries and fractured growth in different directions. Within a strain-tolerant regime, however, triangular single crystals can accommodate considerable (<1.1%) localized strain exerted by surface features that shift the bandgap up to 150 meV. Within this regime, the crystal growth accelerates in specific directions, which we describe using a growth model. These results present a previously unexplored strategy to strain-engineer the growth directions and optoelectronic properties of 2D crystals.
dc.identifier.citationWang, Kai, Puretzky, Alexander A., Hu, Zhili, et al.. "Strain tolerance of two-dimensional crystal growth on curved surfaces." <i>Science Advances,</i> 5, no. 5 (2019) AAAS: https://doi.org/10.1126/sciadv.aav4028.
dc.identifier.digitaleaav4028.full
dc.identifier.doihttps://doi.org/10.1126/sciadv.aav4028
dc.identifier.urihttps://hdl.handle.net/1911/107712
dc.language.isoeng
dc.publisherAAAS
dc.rightsDistributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.titleStrain tolerance of two-dimensional crystal growth on curved surfaces
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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