In the article \u201cComparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures<\/em>\u201d \u00a0Lina Zhang, Xinfeng Tan, Jianguo Jiao, Dan Guo and Jianbin Luo report that they found that the friction force and friction coefficient (COF) of 2H-MoTe2<\/sub> were an order of magnitude smaller than those of 1T\u2019-MoTe2<\/sub> by the atomic force microscope (AFM) experiments. *<\/p>\n The friction difference between 1T\u2019-MoTe2<\/sub> and 2H-MoTe2<\/sub> was further verified in molecular dynamics (MD) simulations. The density functional theory (DFT) calculations suggest that the friction contrast is related to the difference in sliding energy barrier of the potential energy surface (PES) for a tip sliding across the surface. The PES obtained from the DFT calculation indicates that the maximum energy barrier and the minimum energy path (MEP) energy barrier of 2H-MoTe2<\/sub> are both smaller than those of 1T\u2019-MoTe2<\/sub>, which means that less energy needs to be dissipated during the sliding process. The difference in energy barrier of the PES could be ascribed to its larger interlayer spacing and weaker Mo\u2013Te interatomic interactions within the layers of 2H-MoTe2<\/sub> than those of 1T\u2019-MoTe2<\/sub>.<\/p>\n The obvious friction difference between 1T\u2019-MoTe2<\/sub> and 2H-MoTe2<\/sub> not only provides a new non-destructive means to detect the phase transition by the AFM, but also provides a possibility to tune friction by controlling the phase transition, which has the potential to be applied in extreme environments such as space lubrication. *<\/p>\n Friction measurements were carried out using atomic force microscopy (AFM) under ambient conditions. *<\/p>\n NANOSENSORS\u2122 PointProbe\u00ae Plus<\/a> PPP-LFMR<\/a> Silicon AFM probes which are especially designed for lateral or friction force microscopy and are optimized for a high sensitivity to lateral or friction forces with their very soft and thin AFM cantilevers, were used.<\/p>\n The normal and lateral force constants of the NANOSENSORS PPP-LFMR<\/a> AFM probes were calibrated using the thermal noise method and improved wedge calibration method, respectively. *<\/p>\n In the lateral force mode, friction maps were measured with gradient loading applied to a square region of 200 nm \u00d7 200 nm with a scanning frequency of 2 Hz. *<\/p>\n By further reducing the scan range to 20 nm \u00d7 20 nm and increasing the scanning frequency to 20 Hz, the friction maps including atomic-scale stick\u2013slip motion information were obtained, as shown in Figs. 3(a) and 3(f). *<\/p>\n Figure 3 from \u201cComparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures\u201d by Lina Zhang et al.: Atomic-scale friction maps of MoTe 2. (a) Mapping of friction signal of 1T\u2032-MoTe 2. (b) Reciprocal lattice obtained by 2D FFT on (a). (c) Atomic-level stick\u2013slip map obtained by FFT filtering of (a). (d) Unit cell structure of 1T\u2032-MoTe 2. (e) Friction profile extracted along the blue dashed line in (c). (f) Mapping of friction signal of 2H-MoTe 2 . (g) Reciprocal lattice obtained by 2D FFT on (f). (h) Atomic-level stick\u2013slip map obtained by FFT filtering of (f). (i) Unit cell structure of 2H-MoTe2. (j) Friction profile extracted along the blue dashed line in (h).<\/p><\/div>\n *Lina Zhang, Xinfeng Tan, Jianguo Jiao, Dan Guo and Jianbin Luo Please follow this external link to read the full article: https:\/\/link.springer.com\/content\/pdf\/10.1007\/s40544-023-0738-6.pdf<\/a><\/p>\n Open Access: The article \u201cComparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures\u201d<\/em> by Lina Zhang, Xinfeng Tan, Jianguo Jiao, Dan Guo and Jianbin Luo is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article\u2019s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article\u2019s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit https:\/\/creativecommons.org\/licenses\/by\/4.0\/.<\/p>\n","protected":false},"excerpt":{"rendered":" Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have layered structures with excellent tribological properties. * Since the energy difference between hexagonal-molybdenum ditelluride (2H-MoTe2) and distorted octahedral-molybdenum ditelluride (1T\u2019-MoTe2) is very small among the transition metal dichalcogenides (TMDCs), MoTe2 becomes one of the most promising candidates for phase engineering. * In the article \u201cComparative analysis of frictional… Read More »Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":4799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[16],"tags":[851,75,17,18,448,339,398,19,847,508,850,512,848,854,849,468,14,37,27,614,846,241,853,442,616,852],"class_list":{"0":"post-4796","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-science-technology","8":"tag-2d-materials","9":"tag-afm","10":"tag-afm-probes","11":"tag-afm-tips","15":"tag-atomic-force-microscopy","16":"tag-distorted-octahedral-molybdenum-ditelluride-1t-mote2","17":"tag-friction","18":"tag-friction-force-measurements","19":"tag-friction-force-microscopy","20":"tag-hexagonal-molybdenum-ditelluride-2h-mote2","21":"tag-lateral-force-mode","22":"tag-phase-transition","23":"tag-phase-transitions","24":"tag-pointprobeplus","25":"tag-pointprobe-plus","26":"tag-pointprobe-plus-ppp","27":"tag-ppp-lfmr","28":"tag-two-dimensional-2d-materials","29":"tag-two-dimensional-materials","30":"tag-853","31":"tag-442","32":"tag-616","33":"tag-852"},"_links":{"self":[{"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/posts\/4796","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/comments?post=4796"}],"version-history":[{"count":5,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/posts\/4796\/revisions"}],"predecessor-version":[{"id":4803,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/posts\/4796\/revisions\/4803"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/media\/4799"}],"wp:attachment":[{"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/media?parent=4796"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/categories?post=4796"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nanosensors.com\/blog\/wp-json\/wp\/v2\/tags?post=4796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"Figure](\"https:\/\/d218f3btfcac6d.cloudfront.net\/wp-content\/uploads\/2023\/09\/11135812\/figure-3-from-Lina-Zhang-et-al-2023-Comparative-analysis-of-frictional-behavior-and-mechanism-of-molybdenum-ditelluride-with-different-structures-NANOSENSORS-PPP-LFMR-AFM-probe-max.jpg\")
<\/a>
\nComparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures<\/strong>
\nFriction (2023)
\nDOI:\u00a0 https:\/\/doi.org\/10.1007\/s40544-023-0738-6<\/a><\/p>\n