{"id":8649,"date":"2018-07-25T01:15:37","date_gmt":"2018-07-25T00:15:37","guid":{"rendered":"https:\/\/engineernewsnetwork.com\/blog\/?p=8649"},"modified":"2018-07-25T13:56:22","modified_gmt":"2018-07-25T12:56:22","slug":"8649-2","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/8649-2\/","title":{"rendered":"Scientists unlock the properties of new 2D material"},"content":{"rendered":"<p>A new two-dimensional material has become a reality, thanks to a team of Danish and Italian scientists.<\/p>\n<p>The research, led by physicists at Aarhus University, succeeded in the first experimental realisation and structural investigation of single-layer vanadium disulphide (VS2).<\/p>\n<p>It is published in the journal <em>2D Materials<\/em>.<br \/>\n<script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block; text-align: center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-7565662001938327\" data-ad-slot=\"7585079586\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><br \/>\nVS2 is one of a diverse group of compounds known as transition metal dichalcogenides (TMDs).<\/p>\n<p>Many of these can assume a layered crystal structure from which atomically thin crystalline sheets can be isolated.<\/p>\n<p>The electronic properties of the single-atomic-layer crystals can differ in important ways from those of the layered bulk crystals.<\/p>\n<p>Lead author Dr Charlotte Sanders, of Aarhus University, explained the importance of the new findings: \u201cTheoretical studies suggest that single-layer VS2 might exhibit very interesting physics, including magnetism and strong correlations.\u00a0It might also host charge density wave states, as does bulk VS2. However, making VS2 is difficult and the single layer has not been successfully made before now.<\/p>\n<p>\u201cIn fact, magnetism in single-layer materials has only recently been observed, and is still quite rare. So, the possibility that this material might be magnetic is exciting.\u201d<\/p>\n<p>To make the single layer of VS2, the researchers evaporated vanadium onto a clean gold surface at room temperature.<\/p>\n<p>They then heated the sample in the presence of sulphur-containing molecules that react with the vanadium to produce the VS2.<\/p>\n<p>The team measured the properties of the samples using low-energy electron diffraction, scanning tunnelling microscopy, and X-ray photoelectron spectroscopy.<\/p>\n<p>Significantly, the team also discovered a new and unpredicted vanadium sulphide compound.<\/p>\n<p>Most 2D materials can, in theory (although not necessarily in practice), be derived from bulk layered crystals.<\/p>\n<p>However, there is no 3D material that has similar stoichiometry and crystal structure to those of the new compound, which is formed when single-layer VS2 is depleted of sulphur by heating.<\/p>\n<p>In consideration of the likely magnetic properties of related vanadium compounds, the new material might be another candidate for two-dimensional magnetism.<\/p>\n<p>\u201cThe new material&#8217;s electronic structure, along with possible charge density wave phases and magnetic ordering, remain to be explored, and an interesting open question is how its properties differ from those of stoichiometric single-layer VS2,\u201d said Dr Sanders.<\/p>\n<p>The published version of <em>Novel single-layer vanadium sulphide phases<\/em> (Arnold et al 2018 2D Mater. 8 045009) is available now.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new two-dimensional material has become a reality, thanks to a team of Danish and Italian scientists. The research, led by physicists at Aarhus University, succeeded in the first experimental realisation and structural investigation of single-layer vanadium disulphide (VS2). It is published in the journal 2D Materials. VS2 is one of a diverse group of &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105,199],"tags":[3417,2280,4827,4826],"class_list":["post-8649","post","type-post","status-publish","format-standard","","category-design","category-news-views-and-opinion","tag-institute-of-physics","tag-materials","tag-tmds","tag-transition-metal-dichalcogenides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Scientists unlock the properties of new 2D material - Engineer News Network<\/title>\n<meta name=\"description\" content=\"A new two-dimensional material has become a reality, thanks to a team of Danish and Italian scientists.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engineernewsnetwork.com\/blog\/8649-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Scientists unlock the properties of new 2D material - 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