{"id":18801,"date":"2011-07-19T17:54:43","date_gmt":"2011-07-19T14:54:43","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=18801"},"modified":"2011-07-19T17:54:43","modified_gmt":"2011-07-19T14:54:43","slug":"korgkvaliteedilise-grafeeni-valmistamise-votmeks-voib-olla-vesinik","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=18801","title":{"rendered":"K\u00f5rgkvaliteedilise grafeeni valmistamise v\u00f5tmeks v\u00f5ib olla vesinik"},"content":{"rendered":"<p><strong>Uus l\u00e4henemine grafeeni kasvatamisele v\u00e4hendab tunduvalt probleeme, mis teadlastele varem muret on p\u00f5hjustanud ning silub teed grafiidi kristallilise vormi kasutamisele keerukates tuleviku elektroonikaseadmetes.<\/strong><\/p>\n<p>Oak Ridge&#8217;i Riikliku Laboratooriumi Energiaosakonna teadlaste uurimus demonstreerib seda, et grafeenterakeste kuju ja suuruse m\u00e4\u00e4rab \u00e4ra pigem vesinik kui s\u00fcsinik, kirjutab <a href=\"http:\/\/www.physorg.com\/news\/2011-07-hydrogen-key-growth-high-quality-graphene.html\">Physorg.com<\/a>.<\/p>\n<div id=\"attachment_18802\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/07\/hydrogenmayb.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18802\" class=\"size-medium wp-image-18802\" title=\"hydrogenmayb\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/07\/hydrogenmayb-300x226.jpg\" alt=\"\" width=\"300\" height=\"226\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/07\/hydrogenmayb-300x226.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/07\/hydrogenmayb-250x188.jpg 250w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/07\/hydrogenmayb.jpg 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-18802\" class=\"wp-caption-text\">Grafeenterakesi on olemas mitmete erinevate kujudega. Vesinikgaas kontrollib terakeste v\u00e4ljan\u00e4gemist. Pilt: ORNL<\/p><\/div>\n<p>,,Vesinik mitte ainult ei algata grafeeni kasvu vaid kontrollib ka grafeeni kuju ja suurust,&#8221; s\u00f5nas teadlaseid juhtinud teadlane Ivan Vlassiouk. ,,Oma artiklis kirjeldame me meetodit, mille abil kasvatasime selgepiirilisi grafeenterakesi, milledel on t\u00e4iuslikud kuusnurksed kujud, viidates veatule \u00fcksikkristallilisele struktuurile.&#8221;<\/p>\n<p>,,Me n\u00e4itasime, et \u00fcllatavalt ei dikteeri kasvukiirust, grafeenterakese kuju ja suurust ainult s\u00fcsiniku allikas ning substraat,&#8221; seletas Vlassiouk. ,,Me leidsime, et vesinik, mille kohta arvati, et see m\u00e4ngib pigem passiivset rolli, omab grafeeni kasvul \u00fcliolulist rolli. See m\u00f5jutab nii adsorbeerunud molekulide (need algatavad grafeeni kasvu) aktiveerumist kui ka terakese servadel olevate n\u00f5rkade sidemete (mis kontrollivad grafeeni kvaliteeti) kaotamist.&#8221;<\/p>\n<p>Oma uue retsepti abil \u00f5nnestus Vlassioukil ja tema kolleegidel luua viis grafeeni suureskaalaliseks usaldusv\u00e4\u00e4rseks s\u00fcnteesimiseks. Fakt, et selle meetodi abil saab terakese suurust ja piire kontrolli all hoida, v\u00f5ib viia transistorite, pooljuhtide ja potentsiaalselt ka sadade elektroonikaseadmete funktsionaalsuse kasvuni.<\/p>\n<p>Selle uurimuse j\u00e4reldused on olulised. ,,Meie leid on t\u00e4htis v\u00e4ga suureskaalalise \u00fcksikdomeen-grafeeni tootmismeetodi v\u00e4ljaarendamisel, andes olulise panuse grafeeni rakendamisele tulevikuseadmetes.&#8221;<\/p>\n<p><a href=\"http:\/\/www.physorg.com\/news\/2011-07-hydrogen-key-growth-high-quality-graphene.html\">Allikas<\/a><\/p>\n<p>Teadusartikkel: &#8220;<a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/nn201978y\">Role of Hydrogen in Chemical Vapor Deposition Growth of Large Single-Crystal Graphene<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uus l\u00e4henemine grafeeni kasvatamisele v\u00e4hendab tunduvalt probleeme, mis teadlastele varem muret on p\u00f5hjustanud ning silub teed grafiidi kristallilise vormi kasutamisele keerukates tuleviku elektroonikaseadmetes. Oak Ridge&#8217;i Riikliku Laboratooriumi Energiaosakonna teadlaste uurimus demonstreerib seda, et grafeenterakeste kuju ja suuruse m\u00e4\u00e4rab \u00e4ra pigem vesinik kui s\u00fcsinik, kirjutab Physorg.com. ,,Vesinik mitte ainult ei algata grafeeni kasvu vaid kontrollib ka [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[31,16],"tags":[],"class_list":{"0":"post-18801","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rakenduslik-teadus","7":"category-teadusuudis","8":"entry","9":"has-post-thumbnail"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/18801","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18801"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/18801\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}