Mechanical properties of freely suspended semiconducting graphene-like layers based on MoS2 |
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| Authors: | Andres Castellanos-Gomez Menno Poot Gary A Steele Herre SJ van der Zant Nicolás Agra?t Gabino Rubio-Bollinger |
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| Affiliation: | 1.Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, Delft 2628, CJ, The Netherlands;2.Departamento de Física de la Materia Condensada (C-III), Universidad Autónoma de Madrid, Campus de Cantoblanco, Madrid E-28049, Spain;3.Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Madrid E-28049, Spain;4.Department of Engineering Science, Yale University, Becton 215, 15 Prospect St., New Haven, CT 06520, USA |
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| Abstract: | We fabricate freely suspended nanosheets of molybdenum disulphide (MoS2) which are characterized by quantitative optical microscopy and high-resolution friction force microscopy. We study the elastic deformation of freely suspended nanosheets of MoS2 using an atomic force microscope. The Young''s modulus and the initial pre-tension of the nanosheets are determined by performing a nanoscopic version of a bending test experiment. MoS2 sheets show high elasticity and an extremely high Young''s modulus (0.30 TPa, 50% larger than steel). These results make them a potential alternative to graphene in applications requiring flexible semiconductor materials.PACS, 73.61.Le, other inorganic semiconductors, 68.65.Ac, multilayers, 62.20.de, elastic moduli, 81.40.Jj, elasticity and anelasticity, stress-strain relations. |
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| Keywords: | Molybdenum disulfide nanosheets Freely suspended Mechanical properties Atomically thin crystal Mechanical exfoliation |
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