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Synthesis and structural determination of twisted MoS |
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| Authors: | P.?Santiago author-information" > author-information__contact u-icon-before" > mailto:paty@fisica.unam.mx" title=" paty@fisica.unam.mx" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,J.A.?Ascencio,D.?Mendoza,M.?Pérez-Alvarez,A.?Espinosa,C.?Reza-SanGermán,P.?Schabes-Retchkiman,G.A.?Camacho-Bragado,M.?José-Yacamán |
| Affiliation: | (1) Instituto de Física, Universidad Nacional Autónoma de Mexico, Apartado Postal 20-364, 01000 Mexico, D.F., Mexico;(2) Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, C.P. 07730 Mexico, D.F., Col. San Bartolo Atepehuacan, Mexico;(3) Facultad de Química, Universidad Autónoma del Estado de Mexico, Paseo Colon esq. Paseo Tollocan, Apartado Postal A-20, C.P. 50120 Toluca, Mexico;(4) Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de Mexico, Apartado Postal 70-360, 04510 Mexico, D.F., Mexico;(5) Instituto Nacional de Investigaciones Nucleares, Km. 36.5 Carr, Mexico-Toluca Ocoyoacac, Mexico;(6) Department of Chemical Engineering, CNM and TMI, University of Texas at Austin, 78712 Austin, TX, USA;(7) Facultad de Cien!["cacute"]("/content/cpc6ch85wjvw6a1r/xlarge263.gif") ias VAEMEX, 50000 Toloca, Edo Mex., Mexico |
| Abstract: | In the present work we report the synthesis of MoS2 nanotubes with diameters greater than 10 nm using a template method. The length and properties of these nanotubes are a direct result of the preparation method. High-resolution transmission electron microscopy is used to study the structure of these highly curved entities. Molecular dynamics simulations of MoS2 nanotubes reveal that one of the stable forms of the nanotubes is a twisted one. The twisting of the nanotubes produces a characteristic contrast in the images, which is also studied using simulation methods. The analysis of the local contrast close to the perpendicular orientation shows geometrical arrays of dots in domain-like structures, which are demonstrated to be a product of the atomic overlapping of irregular curvatures in the nanotubes. The configuration of some of the experimentally obtained nanotubes is demonstrated to be twisted with a behavior suggesting partial plasticity. PACS 61.16.Bg; 79.60.Jv; 61.46.+w; 61.50.Ah |
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