{"id":55403,"date":"2022-11-30T11:02:02","date_gmt":"2022-11-30T09:02:02","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=55403"},"modified":"2023-02-03T16:57:40","modified_gmt":"2023-02-03T14:57:40","slug":"these-j-hadid-croissance-de-bn-hexagonal-par-epitaxie-par-jets-moleculaires-sur-nickel","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/these\/these-2021\/these-j-hadid-croissance-de-bn-hexagonal-par-epitaxie-par-jets-moleculaires-sur-nickel.html","title":{"rendered":"THESE : J. HADID  \u2013 Croissance de BN hexagonal par \u00e9pitaxie par jets mol\u00e9culaires sur nickel"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_am9p6uwtx6yn\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-55403'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-681130af58534f2bbc6dc712fa3832bd\">\n#top .av-special-heading.av-av_heading-681130af58534f2bbc6dc712fa3832bd{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-av_heading-681130af58534f2bbc6dc712fa3832bd .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-681130af58534f2bbc6dc712fa3832bd .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-681130af58534f2bbc6dc712fa3832bd av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : J. HADID &#8211; Croissance de BN hexagonal par \u00e9pitaxie par jets mol\u00e9culaires sur nickel<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p><strong>J. HADID<br \/>\n<\/strong><\/p>\n<p>Soutenance : <strong>7 Avril 2021<br \/>\n<\/strong>T<span class=\"titre\">h\u00e8se de doctorat en Electronique, micro\u00e9lectronique, nano\u00e9lectronique et micro-ondes, Universit\u00e9 de Lille<\/span><br \/>\n<span class=\"projets\">Associated project: RENATECH<\/span><br \/>\n<span class=\"idhal\"><br \/>\n<\/span><\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5>Summary:<\/h5>\n<p>L\u2019exploitation des propri\u00e9t\u00e9s \u00e9lectriques du graph\u00e8ne dans des dispositifs reste un d\u00e9fi. Du fait de sa nature bidimensionnelle, ses propri\u00e9t\u00e9s sont fortement influenc\u00e9es par l\u2019environnement (substrat\u2026). R\u00e9cemment, de nombreuses \u00e9tudes ont montr\u00e9 que le nitrure de bore hexagonal (h-BN) est un substrat appropri\u00e9 pour pr\u00e9server les propri\u00e9t\u00e9s \u00e9lectriques du graph\u00e8ne. Malgr\u00e9 les progr\u00e8s dans les techniques de synth\u00e8se, les recherches actuelles sont toujours confront\u00e9es \u00e0 un d\u00e9fi majeur: la croissance de BN \u00e0 grande \u00e9chelle avec un contr\u00f4le de l\u2019\u00e9paisseur. Nous explorons dans ce manuscrit la croissance de h-BN par \u00e9pitaxie par jets mol\u00e9culaires, technique devant permettre un bon contr\u00f4le d\u2019\u00e9paisseur des couches dans des conditions d\u2019ultravide. En raison de sa faible diff\u00e9rence de param\u00e8tre de maille avec le h-BN, du nickel poly- et monocristallin ont \u00e9t\u00e9 utilis\u00e9s comme substrats. Utilisant diff\u00e9rentes combinaisons de pr\u00e9curseurs, borazine et borazine associ\u00e9e \u00e0 un plasma azote, nous avons optimis\u00e9 les conditions de croissances. Nous confirmons gr\u00e2ce \u00e0 des mesures de photo\u00e9mission qu\u2019un fort couplage \u00e9lectronique existe \u00e0 l\u2019interface entre h-BN et Ni. Nous mettons en \u00e9vidence l\u2019effet catalytique du Ni permettant une croissance de h-BN d\u2019\u00e9paisseur constante sur de larges dimensions. D\u2019autre part, en associant la borazine \u00e0 l\u2019azote actif, nous montrons qu\u2019un exc\u00e8s d\u2019\u00e9l\u00e9ment V permet de s\u2019affranchir de l\u2019effet catalytique du substrat de Ni et d\u2019obtenir du BN-2D de tr\u00e8s bonne qualit\u00e9 cristalline. De plus, nous soulignons la d\u00e9pendance de la qualit\u00e9 du BN-2D \u00e0 l\u2019orientation cristalline du substrat.<\/p>\n<h5>Abstract:<\/h5>\n<p>The exploitation of the electrical properties of graphene in devices remains a challenge. Due to its two-dimensional nature, its properties are strongly influenced by the environment (substrate\u2026). Recently, many studies have shown that hexagonal boron nitride (h-BN) is a suitable substrate to preserve the electrical properties of graphene. Despite advances in synthesis techniques, current research still faces a major challenge: large-scale BN growth with thickness control. In this manuscript, we explore the growth of h-BN by molecular beam epitaxy, a technique that should allow a good control of the thickness of the layers under ultra-high vacuum conditions. Due to its small difference in lattice parameter with h-BN, poly- and single crystal nickel were used as substrates. Using different combinations of precursors, borazine and borazine associated with a nitrogen plasma, we have optimized the growth conditions. We confirm through photoemission measurements that a strong electronic coupling exists at the interface between h-BN and Ni. We highlight the catalytic effect of Ni allowing a growth of h-BN of constant thickness over large dimensions. On the other hand, by associating borazine with active nitrogen, we show that an excess of V element allows to get rid of the catalytic effect of the Ni substrate and to obtain BN-2D of very good crystal quality. Moreover, we highlight the dependence of the BN-2D quality on the crystalline orientation of the substrate.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[317],"tags":[],"class_list":["post-55403","post","type-post","status-publish","format-standard","hentry","category-these-2021"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=55403"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55403\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=55403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=55403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=55403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}