[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.daedo.cz\/grafen-material-budoucnosti\/#Article","mainEntityOfPage":"https:\/\/www.daedo.cz\/grafen-material-budoucnosti\/","headline":"Grafen: materi\u00e1l budoucnosti","name":"Grafen: materi\u00e1l budoucnosti","description":"Tenk\u00e1, prakticky pr\u016fhledn\u00e1 a extr\u00e9mn\u011b odoln\u00e1 forma uhl\u00edku. P\u0159esn\u011b takov\u00fd je grafen . Z uhl\u00edku m\u016f\u017eete samoz\u0159ejm\u011b z\u00edskat tak\u00e9 grafit nebo diamant, ale ka\u017ed\u00fd z t\u011bchto materi\u00e1l\u016f m\u00e1 r\u016fzn\u00e9 technologick\u00e9 postupy na jejich z\u00edsk\u00e1n\u00ed. Grafen je ov\u0161em formou budoucnosti, kter\u00fd bude vhodn\u00fd pro mnoho nov\u00fdch i st\u00e1vaj\u00edc\u00edch technologi\u00ed. Mo\u017enosti vyu\u017eit\u00ed T\u00fdm v\u011bdc\u016f z Ameriky v […]","datePublished":"2019-04-21","dateModified":"2019-04-21","author":{"@type":"Person","@id":"https:\/\/www.daedo.cz\/author\/#Person","name":"","url":"https:\/\/www.daedo.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/4faace62981be50719be6a25151192978e6d585737a520836dcb98934de3bb45?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4faace62981be50719be6a25151192978e6d585737a520836dcb98934de3bb45?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"daedo.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.daedo.cz\/wp-content\/uploads\/img_a343161_w2102_t1556360058.jpg","url":"https:\/\/www.daedo.cz\/wp-content\/uploads\/img_a343161_w2102_t1556360058.jpg","height":0,"width":0},"url":"https:\/\/www.daedo.cz\/grafen-material-budoucnosti\/","wordCount":421,"articleBody":" Tenk\u00e1, prakticky pr\u016fhledn\u00e1 a extr\u00e9mn\u011b odoln\u00e1 forma uhl\u00edku. P\u0159esn\u011b takov\u00fd je grafen . Z uhl\u00edku m\u016f\u017eete samoz\u0159ejm\u011b z\u00edskat tak\u00e9 grafit nebo diamant, ale ka\u017ed\u00fd z t\u011bchto materi\u00e1l\u016f m\u00e1 r\u016fzn\u00e9 technologick\u00e9 postupy na jejich z\u00edsk\u00e1n\u00ed. Grafen je ov\u0161em formou budoucnosti, kter\u00fd bude vhodn\u00fd pro mnoho nov\u00fdch i st\u00e1vaj\u00edc\u00edch technologi\u00ed.  Mo\u017enosti vyu\u017eit\u00ed T\u00fdm v\u011bdc\u016f z Ameriky v \u010dele s Mohamadem Kabbanim zjistil, jak ho vytvo\u0159it nov\u00fdm zp\u016fsobem a jak\u00e9 vyu\u017eit\u00ed pro n\u011bj bude nejlep\u0161\u00ed. L\u00e1tka je podobn\u00fd grafitu, ale na rozd\u00edl od n\u011bj m\u00e1 pouze jednu vrstvu atom\u016f. Ty jsou v\u00e1z\u00e1ny do \u0161esti\u00faheln\u00edk\u016f, co\u017e jim p\u0159in\u00e1\u0161\u00ed velmi unik\u00e1tn\u00ed strukturu. D\u00edky n\u00ed m\u00e1 nenahraditeln\u00e9 vlastnosti jako: velmi dobrou vodivost elekt\u0159iny a tepla, extr\u00e9mn\u00ed pevnost, pr\u016fhlednost. T\u00fdm v\u011bdc\u016f z americk\u00e9ho Texasu, p\u0159esn\u011bji z Univerzity Rice p\u0159i\u0161li s novou metodou, jak z \u010dern\u00e9ho pr\u00e1\u0161ku vytvo\u0159it pelety. Revolu\u010dn\u00ed nen\u00ed tato schopnost, ale mo\u017enost toto prov\u00e9st prost\u0159ednictv\u00edm lisov\u00e1n\u00ed p\u0159i n\u00edzk\u00fdch teplot\u00e1ch a n\u00edzk\u00e9m tlaku. To se zat\u00edm nikomu jin\u00e9mu nepoda\u0159ilo. Z t\u00e9to jedine\u010dn\u00e9 struktury lze vyrobit peletky, kter\u00e9 m\u016f\u017eeme vyu\u017e\u00edt jako elektrody pro baterie, ale tak\u00e9 jako materi\u00e1l u\u017e\u00edvan\u00fd p\u0159i v\u00fdrob\u011b elektrick\u00fdch kabel\u016f. D\u00edky tomu, \u017ee pat\u0159\u00ed mezi nejpevn\u011bj\u0161\u00ed materi\u00e1ly na sv\u011bt\u011b, je k t\u00e9to instalaci ide\u00e1ln\u00ed, proto\u017ee vydr\u017e\u00ed prakticky v\u0161echno.  Jak prob\u00edh\u00e1 v\u00fdroba? V roce 2010 z\u00edskali v\u011bdci Nobelovu cenu za izolov\u00e1n\u00ed grafenu z b\u011b\u017en\u00e9ho grafitu jen pomoc\u00ed oby\u010dejn\u00e9 lep\u00edc\u00ed p\u00e1sky. Tohle ale nen\u00ed ten p\u0159\u00edpad. Zde jde o profesion\u00e1ln\u011bj\u0161\u00ed produkci. Kabbani a jeho kolegov\u00e9 pou\u017e\u00edvaj\u00ed dva druhy uhl\u00edkov\u00fdch nanotrubic. Jedna z nich se v\u00e1\u017ee se karboxylovou skupinu (-COOH) a druh\u00e1 na hydroxylovou skupinu (-OH). Tyto trubice vznikl\u00fd pr\u00e1\u0161ek rozdrt\u00ed, sm\u00edchaj\u00ed a slisuj\u00ed do pelet prost\u0159ednictv\u00edm ru\u010dn\u00edho lisu. Po dokon\u010den\u00ed produkce t\u00edmto zp\u016fsobem p\u0159i\u0161lo na \u0159adu testov\u00e1n\u00ed. To prob\u00edhalo po dobu p\u011bti hodin v hork\u00e9 vod\u011b. A uk\u00e1zalo se, \u017ee je l\u00e1tka dokonale stabiln\u00ed. Nyn\u00ed u\u017e se m\u016f\u017eeme jen t\u011b\u0161it, na co dal\u0161\u00edho ho vyu\u017eij\u00ed p\u0159\u00ed\u0161t\u011b.                                                                                                                                                                                                                                                                                                                                                                                        4.3\/5 - (6 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Grafen: materi\u00e1l budoucnosti","item":"https:\/\/www.daedo.cz\/grafen-material-budoucnosti\/#breadcrumbitem"}]}]