{"id":21960,"date":"2011-10-27T15:15:59","date_gmt":"2011-10-27T12:15:59","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=21960"},"modified":"2011-10-27T15:15:59","modified_gmt":"2011-10-27T12:15:59","slug":"molekulid-kaituvad-nanoskaalas-teisiti","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=21960","title":{"rendered":"Molekulid k\u00e4ituvad nanoskaalas teisiti"},"content":{"rendered":"<p><strong>Vedelike voolamist l\u00e4bi nanoskaalas kanalite uurivad teadlased avastasid enda \u00fcllatuseks, et vedelikud ei voola igas suunas v\u00f5rdselt h\u00e4sti. Vastupidiselt makroskaalas n\u00e4htavale voolamisele avastasid teadlased, et met\u00fc\u00fclalkohol, mis asetati tseoliidist valmistatud nanoskaalas kanalite v\u00f5rgustikku, levis \u00fches suunas 1000 korda paremini kui teises. Need tulemused on esimesed, mis viitavad molekulide eba\u00fchtlasele levikule nanopoorsetes materjalides. See erakordselt ebav\u00f5rdne voolamine toimus vaatamata sellele, et antud kanalite diameetrid olid v\u00f5rdlemisi sarnased. Mineraalis oli kahte sorti kanaleid: 8-ring ja 10-ring. Need numbrid viitavad pooride suhtelistele suurustele materjalis vaatamata sellele, et need on suuruselt \u00e4\u00e4rmiselt sarnased, erinevused esinevad vaid nende geomeetrias. Met\u00fc\u00fclalkoholi molekule s\u00e4ilitati optilise raku sisemuses.<\/strong><\/p>\n<div id=\"attachment_21961\" style=\"width: 280px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/10\/540px-Zeolite-ZSM-5-3D-vdW.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-21961\" class=\"size-medium wp-image-21961\" title=\"540px-Zeolite-ZSM-5-3D-vdW\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/10\/540px-Zeolite-ZSM-5-3D-vdW-270x300.png\" alt=\"\" width=\"270\" height=\"300\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/540px-Zeolite-ZSM-5-3D-vdW-270x300.png 270w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/540px-Zeolite-ZSM-5-3D-vdW-250x277.png 250w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/10\/540px-Zeolite-ZSM-5-3D-vdW.png 540w\" sizes=\"auto, (max-width: 270px) 100vw, 270px\" \/><\/a><p id=\"caption-attachment-21961\" class=\"wp-caption-text\">Tseoliidi mikropoorne struktuur. Allikas: Wikipedia<\/p><\/div>\n<p>Eksperimendi alguses suurendati hetkeliselt \u00fcmbritseva atmosf\u00e4\u00e4ri r\u00f5hku ning see hoiti kogu katse v\u00e4ltel konstantsena. Metanooli molekulid sisenevad tseoliiti ise, sest nad eelistavad olla pigem tseoliidis kui gaasikeskkonnas. Teadlased m\u00f5\u00f5tsid osakeste kontsentratsiooni pooride erinevates punktides ning arvutasid sellest v\u00e4lja osakeste voo, kirjutab<a href=\"http:\/\/www.physorg.com\/news\/2011-10-nanoscale-particles-unexpected-ways.html\"> Physorg.com<\/a>.<\/p>\n<p>Varasemates uurimust\u00f6\u00f6des on kirjeldatud, et poorv\u00f5rgustikus oleva k\u00fclalismolekuli liikumine s\u00f5ltub suuresti poori avause ning molekuli diameetri vahelisest suhtest ning seda eriti siis, kui need suurused on sarnased &#8211; antud juhul tseoliidi kanalite ning met\u00fc\u00fclalkoholi aatomitega just nii oligi. Uurimuses osalenud teadlased spekuleerivad, et kuna 8-ringi avaus on veidi v\u00e4iksem kui 10-ringi aken, siis v\u00f5is oodata ka v\u00e4iksemat voolavust (ning seega ka voogu). Teiseks p\u00f5hjuseks v\u00f5ib olla ka erinev pooride geomeetria.<\/p>\n<p>Sellel m\u00f5istusele vastur\u00e4\u00e4kival avastusel on kaugeleulatuvad rakendused uute mikroskoopiliste materjalide, seehulgas nanotorude ja ravimitranspordiks m\u00f5eldud ,,tarkade&#8221; rakumembraanide m\u00f5istmisel, arendamisel ning kasutamisel.<\/p>\n<p><a href=\"http:\/\/www.physorg.com\/news\/2011-10-nanoscale-particles-unexpected-ways.html\">Allikas<\/a><\/p>\n<p>Teadusartikkel<strong> <\/strong> &#8220;Micro-imaging of transient guest profiles in nano-channels&#8221; ilmub varsti teadusajakirjas <em>Journal of Chemical Physics<\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vedelike voolamist l\u00e4bi nanoskaalas kanalite uurivad teadlased avastasid enda \u00fcllatuseks, et vedelikud ei voola igas suunas v\u00f5rdselt h\u00e4sti. Vastupidiselt makroskaalas n\u00e4htavale voolamisele avastasid teadlased, et met\u00fc\u00fclalkohol, mis asetati tseoliidist valmistatud nanoskaalas kanalite v\u00f5rgustikku, levis \u00fches suunas 1000 korda paremini kui teises. Need tulemused on esimesed, mis viitavad molekulide eba\u00fchtlasele levikule nanopoorsetes materjalides. See erakordselt ebav\u00f5rdne [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":21961,"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":[110],"class_list":{"0":"post-21960","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-rakenduslik-teadus","8":"category-teadusuudis","9":"tag-materjal","10":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/21960","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=21960"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/21960\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/21961"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21960"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21960"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21960"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}