{"id":18547,"date":"2015-02-17T12:00:00","date_gmt":"2015-02-17T12:00:00","guid":{"rendered":"https:\/\/dev.inrs.ca\/a-novel-approach-for-high-performance-field-emission-electron-sources\/"},"modified":"2020-11-26T14:51:55","modified_gmt":"2020-11-26T19:51:55","slug":"a-novel-approach-for-high-performance-field-emission-electron-sources","status":"publish","type":"post","link":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/","title":{"rendered":"A novel  approach for high performance field emission electron sources"},"content":{"rendered":"\n<p><strong>Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution electron microscopes to portable X-ray imaging systems. In a paperrecently published in&nbsp;<a href=\"http:\/\/iopscience.iop.org\/0957-4484\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Nanotechnology<\/em><\/a><em>,&nbsp;<\/em>a team led by Professor&nbsp;<a href=\"https:\/\/dev.inrs.ca\/en\/research\/professors\/my-ali-el-khakani\/\">My Ali El Khakani<\/a>, from the&nbsp;<a href=\"https:\/\/dev.inrs.ca\/en\/inrs\/research-centres\/energie-materiaux-telecommunications-research-centre\/\">Energie Mat\u00e9riaux T\u00e9l\u00e9communications Research Centre<\/a>&nbsp;of INRS (INRS-EMT), has reported an original approach for the development of novel graphenated-MWCNTs with enhanced field electron emission (FEE) properties.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/2020\/11\/NEWS_A-novel-approach-for-high-performance-field-emission-electron-sources_01.jpg\" alt=\"\" width=\"686\" height=\"413\"\/><\/figure><\/div>\n\n\n\n<p>The tips of these MWCNTs are made of deployed graphene sheets. By appropriately decorating those graphene sheets with gold nanoparticles, the INRS-EMT team was able to increase significantly the density of electron-emitting sites, and thereby improve their FEE performance. A transmission electron microscopy (TEM) image of these impressive nanohybrid FEE structures was chosen by the journal editor to be featured on the cover page of the&nbsp;<em>Nanotechnolgy journal&nbsp;<\/em>(Vol. 26, No. 4).<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/2020\/11\/NEWS_A-novel-approach-for-high-performance-field-emission-electron-sources_02.jpg\" alt=\"\" width=\"373\" height=\"440\"\/><\/figure><\/div>\n\n\n\n<p>The MWCNTs are excellent field electron emitters due to their stability and electronic conduction at room temperature, but there is still challenges to maximize their emission current at the lowest applied electric field possible. In this context, the two-step growth process developed by INRS researchers was demonstrated to enhance effectively the FEE performance of these new cold electron emitting cathodes.<\/p>\n\n\n\n<p>The team used a plasma-enhanced chemical vapour deposition (PECVD) process to grow the carbon nanotubes, while optimizing the plasma growth conditions to produce MWCNTs with tips made of deployed graphene sheets. In a second step, by capitalizing on their expertise in the field of laser ablation, they decorated these graphenated-MWCNT (g-MWCNT) structures with 2-3 nm-diameter gold nanoparticles (Au-NP).<\/p>\n\n\n\n<p>The new nanohybrid structures (g-MWCNT\/Au-NP) have a significantly higher density of electron-emitting sites, which greatly enhances the field electron emission. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u201cThe unique electronic structure of graphene along with its particular surface topography make it an ideal substrate for decoration with gold nanoparticles. Those Au-NP contribute positively to the FEE process through &nbsp;the enhancement of the local electron field, which in turn maximizes the electron emission from these g-MWCNT\/Au-NP&nbsp;nanohybrid.\u201d <\/p><cite>Professor El Khakani<\/cite><\/blockquote>\n\n\n\n<p>The development of these new nanohybrid emitters opens new prospects for their application as cold cathodes in portable, low voltage, highly brilliant electron sources.<\/p>\n\n\n\n<p>The highlights of this research have been posted on the blog&nbsp;<a href=\"http:\/\/iopscience.iop.org\/0957-4484\/labtalk-article\/59798\" target=\"_blank\" rel=\"noreferrer noopener\">Lab Talk<\/a>. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>About this paper<\/strong><\/h2>\n\n\n\n<p><em>The results of this research, which was carried out as part of the doctoral thesis of Loick-Alexandre Gauthier under the supervision of Prof. El Khakani of the \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications Research Centre at INRS, were published in&nbsp;<\/em>Nanotechnology (Vol. 26, No. 4)<em>. The article is entitled \u201c<\/em><a href=\"http:\/\/iopscience.iop.org\/0957-4484\/26\/4\/045706\/article\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Field electron emission enhancement of graphenated MWCNTs emitters following their decoration with Au nanoparticles by a pulsed laser ablation process<\/em><\/a><em>,&#8221;&nbsp;and the authors are L. A. Gautier, V. Le Borgne, N. Delegan, R. Pandiyan, and M. A. El Khakani. The research team received funding from the Natural Sciences and Engineering Research Council of Canada (NSERC), Plasma-Qu\u00e9bec, a centre of excellence of Fonds de recherche du Qu\u00e9bec \u2013 Nature et technologies (FRQNT), and Nano-Qu\u00e9bec.&nbsp;<\/em><a href=\"http:\/\/iopscience.iop.org\/0957-4484\/26\/4\/045706\/article\" target=\"_blank\" rel=\"noreferrer noopener\">DOI:10.1088\/0957-4484\/26\/4\/045706<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution electron microscopes to portable X-ray imaging systems. In a paperrecently published in&nbsp;Nanotechnology,&nbsp;a team led by Professor&nbsp;My Ali El Khakani, from the&nbsp;Energie Mat\u00e9riaux T\u00e9l\u00e9communications Research Centre&nbsp;of INRS (INRS-EMT), has reported an original approach for the development [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18548,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[688],"tags":[],"sectors":[735,731],"class_list":["post-18547","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innover-a-linrs-en","sectors-energie-en","sectors-materiaux-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A novel approach for high performance field emission electron sources | INRS<\/title>\n<meta name=\"description\" content=\"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A novel approach for high performance field emission electron sources | INRS\" \/>\n<meta property=\"og:description\" content=\"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/\" \/>\n<meta property=\"og:site_name\" content=\"INRS\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/inrsciences\/\" \/>\n<meta property=\"article:published_time\" content=\"2015-02-17T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-11-26T19:51:55+00:00\" \/>\n<meta name=\"author\" content=\"inrsadmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@inrsciences\" \/>\n<meta name=\"twitter:site\" content=\"@inrsciences\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"inrsadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/\",\"url\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/\",\"name\":\"A novel approach for high performance field emission electron sources | INRS\",\"isPartOf\":{\"@id\":\"https:\/\/dev.inrs.ca\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg\",\"datePublished\":\"2015-02-17T12:00:00+00:00\",\"dateModified\":\"2020-11-26T19:51:55+00:00\",\"author\":{\"@id\":\"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/3ca476fa13dfaddd95ebd8f26337ed0f\"},\"description\":\"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec\",\"breadcrumb\":{\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#breadcrumb\"},\"inLanguage\":\"en-CA\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-CA\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage\",\"url\":\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg\",\"contentUrl\":\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg\",\"width\":250,\"height\":295},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"INRS\",\"item\":\"https:\/\/dev.inrs.ca\/linrs\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Newsroom\",\"item\":\"https:\/\/dev.inrs.ca\/linrs\/salle-de-nouvelles\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"News\",\"item\":\"https:\/\/dev.inrs.ca\/linrs\/salle-de-nouvelles\/actualites\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"A novel approach for high performance field emission electron sources\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/#website\",\"url\":\"https:\/\/dev.inrs.ca\/en\/\",\"name\":\"INRS\",\"description\":\"Institut national de la recherche scientifique\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/dev.inrs.ca\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-CA\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/3ca476fa13dfaddd95ebd8f26337ed0f\",\"name\":\"inrsadmin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-CA\",\"@id\":\"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/40b736160f83ebb228ddc350b78913ad?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/40b736160f83ebb228ddc350b78913ad?s=96&d=mm&r=g\",\"caption\":\"inrsadmin\"},\"url\":\"https:\/\/dev.inrs.ca\/en\/author\/inrsadmin\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"A novel approach for high performance field emission electron sources | INRS","description":"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"A novel approach for high performance field emission electron sources | INRS","og_description":"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec","og_url":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/","og_site_name":"INRS","article_publisher":"https:\/\/www.facebook.com\/inrsciences\/","article_published_time":"2015-02-17T12:00:00+00:00","article_modified_time":"2020-11-26T19:51:55+00:00","author":"inrsadmin","twitter_card":"summary_large_image","twitter_creator":"@inrsciences","twitter_site":"@inrsciences","twitter_misc":{"Written by":"inrsadmin","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/","url":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/","name":"A novel approach for high performance field emission electron sources | INRS","isPartOf":{"@id":"https:\/\/dev.inrs.ca\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage"},"image":{"@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage"},"thumbnailUrl":"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg","datePublished":"2015-02-17T12:00:00+00:00","dateModified":"2020-11-26T19:51:55+00:00","author":{"@id":"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/3ca476fa13dfaddd95ebd8f26337ed0f"},"description":"Enhancing the electron emission of multiwall carbon nanotubes (MWCNT) is key for applications ranging from cold cathodes used in high-resolution elec","breadcrumb":{"@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#breadcrumb"},"inLanguage":"en-CA","potentialAction":[{"@type":"ReadAction","target":["https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/"]}]},{"@type":"ImageObject","inLanguage":"en-CA","@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#primaryimage","url":"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg","contentUrl":"https:\/\/dev.inrs.ca\/wp-content\/uploads\/\/2020\/08\/cathode.jpg","width":250,"height":295},{"@type":"BreadcrumbList","@id":"https:\/\/dev.inrs.ca\/en\/news\/a-novel-approach-for-high-performance-field-emission-electron-sources\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"INRS","item":"https:\/\/dev.inrs.ca\/linrs\/"},{"@type":"ListItem","position":2,"name":"Newsroom","item":"https:\/\/dev.inrs.ca\/linrs\/salle-de-nouvelles\/"},{"@type":"ListItem","position":3,"name":"News","item":"https:\/\/dev.inrs.ca\/linrs\/salle-de-nouvelles\/actualites\/"},{"@type":"ListItem","position":4,"name":"A novel approach for high performance field emission electron sources"}]},{"@type":"WebSite","@id":"https:\/\/dev.inrs.ca\/en\/#website","url":"https:\/\/dev.inrs.ca\/en\/","name":"INRS","description":"Institut national de la recherche scientifique","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/dev.inrs.ca\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-CA"},{"@type":"Person","@id":"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/3ca476fa13dfaddd95ebd8f26337ed0f","name":"inrsadmin","image":{"@type":"ImageObject","inLanguage":"en-CA","@id":"https:\/\/dev.inrs.ca\/en\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/40b736160f83ebb228ddc350b78913ad?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/40b736160f83ebb228ddc350b78913ad?s=96&d=mm&r=g","caption":"inrsadmin"},"url":"https:\/\/dev.inrs.ca\/en\/author\/inrsadmin\/"}]}},"_links":{"self":[{"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/posts\/18547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/comments?post=18547"}],"version-history":[{"count":5,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/posts\/18547\/revisions"}],"predecessor-version":[{"id":36094,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/posts\/18547\/revisions\/36094"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/media\/18548"}],"wp:attachment":[{"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/media?parent=18547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/categories?post=18547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/tags?post=18547"},{"taxonomy":"sectors","embeddable":true,"href":"https:\/\/dev.inrs.ca\/en\/wp-json\/wp\/v2\/sectors?post=18547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}