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Extreme Bendability of Atomically Thin MoS 2 Grown by Chemical Vapor Deposition Assisted by Perylene-Based Promoter.

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Title: Extreme Bendability of Atomically Thin MoS 2 Grown by Chemical Vapor Deposition Assisted by Perylene-Based Promoter.
Authors: Martella, Christian1 (AUTHOR) christian.martella@mdm.imm.cnr.it, Campi, Davide2 (AUTHOR) christian.martella@mdm.imm.cnr.it, Tummala, Pinaka Pani1,3,4 (AUTHOR), Kozma, Erika5 (AUTHOR), Targa, Paolo6 (AUTHOR), Codegoni, Davide6 (AUTHOR), Bernasconi, Marco2 (AUTHOR), Lamperti, Alessio1 (AUTHOR) christian.martella@mdm.imm.cnr.it, Molle, Alessandro1 (AUTHOR) christian.martella@mdm.imm.cnr.it
Source: Nanomaterials (2079-4991). Nov2022, Vol. 12 Issue 22, p4050. 10p.
Subjects: Chemical vapor deposition, Transmission electron microscopes, Molybdenum disulfide, Spatial arrangement, Density functional theory
Abstract: Shaping two-dimensional (2D) materials in arbitrarily complex geometries is a key to designing their unique physical properties in a controlled fashion. This is an elegant solution, taking benefit from the extreme flexibility of the 2D layers but requiring the ability to force their spatial arrangement from flat to curved geometries in a delicate balance among free-energy contributions from strain, slip-and-shear mechanisms, and adhesion to the substrate. Here, we report on a chemical vapor deposition approach, which takes advantage of the surfactant effects of organic molecules, namely the tetrapotassium salt of perylene-3,4,9,10-tetracarboxylic acid (PTAS), to conformally grow atomically thin layers of molybdenum disulphide (MoS2) on arbitrarily nanopatterned substrates. Using atomically resolved transmission electron microscope images and density functional theory calculations, we show that the most energetically favorable condition for the MoS2 layers consists of its adaptation to the local curvature of the patterned substrate through a shear-and-slip mechanism rather than strain accumulation. This conclusion also reveals that the perylene-based molecules have a role in promoting the adhesion of the layers onto the substrate, no matter the local-scale geometry. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Extreme Bendability of Atomically Thin MoS 2 Grown by Chemical Vapor Deposition Assisted by Perylene-Based Promoter.
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  Data: <searchLink fieldCode="AR" term="%22Martella%2C+Christian%22">Martella, Christian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> christian.martella@mdm.imm.cnr.it</i><br /><searchLink fieldCode="AR" term="%22Campi%2C+Davide%22">Campi, Davide</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> christian.martella@mdm.imm.cnr.it</i><br /><searchLink fieldCode="AR" term="%22Tummala%2C+Pinaka+Pani%22">Tummala, Pinaka Pani</searchLink><relatesTo>1,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kozma%2C+Erika%22">Kozma, Erika</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Targa%2C+Paolo%22">Targa, Paolo</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Codegoni%2C+Davide%22">Codegoni, Davide</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bernasconi%2C+Marco%22">Bernasconi, Marco</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lamperti%2C+Alessio%22">Lamperti, Alessio</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> christian.martella@mdm.imm.cnr.it</i><br /><searchLink fieldCode="AR" term="%22Molle%2C+Alessandro%22">Molle, Alessandro</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> christian.martella@mdm.imm.cnr.it</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Nov2022, Vol. 12 Issue 22, p4050. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Chemical+vapor+deposition%22">Chemical vapor deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopes%22">Transmission electron microscopes</searchLink><br /><searchLink fieldCode="DE" term="%22Molybdenum+disulfide%22">Molybdenum disulfide</searchLink><br /><searchLink fieldCode="DE" term="%22Spatial+arrangement%22">Spatial arrangement</searchLink><br /><searchLink fieldCode="DE" term="%22Density+functional+theory%22">Density functional theory</searchLink>
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  Data: Shaping two-dimensional (2D) materials in arbitrarily complex geometries is a key to designing their unique physical properties in a controlled fashion. This is an elegant solution, taking benefit from the extreme flexibility of the 2D layers but requiring the ability to force their spatial arrangement from flat to curved geometries in a delicate balance among free-energy contributions from strain, slip-and-shear mechanisms, and adhesion to the substrate. Here, we report on a chemical vapor deposition approach, which takes advantage of the surfactant effects of organic molecules, namely the tetrapotassium salt of perylene-3,4,9,10-tetracarboxylic acid (PTAS), to conformally grow atomically thin layers of molybdenum disulphide (MoS2) on arbitrarily nanopatterned substrates. Using atomically resolved transmission electron microscope images and density functional theory calculations, we show that the most energetically favorable condition for the MoS2 layers consists of its adaptation to the local curvature of the patterned substrate through a shear-and-slip mechanism rather than strain accumulation. This conclusion also reveals that the perylene-based molecules have a role in promoting the adhesion of the layers onto the substrate, no matter the local-scale geometry. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Molybdenum disulfide
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      – SubjectFull: Spatial arrangement
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      – SubjectFull: Density functional theory
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              Text: Nov2022
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