[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.rasheeba.cz\/grafen-neuveritelna-latka-kterou-mozna-ani-neznate\/#Article","mainEntityOfPage":"https:\/\/www.rasheeba.cz\/grafen-neuveritelna-latka-kterou-mozna-ani-neznate\/","headline":"Grafen \u2013 neuv\u011b\u0159iteln\u00e1 l\u00e1tka, kterou mo\u017en\u00e1 ani nezn\u00e1te","name":"Grafen \u2013 neuv\u011b\u0159iteln\u00e1 l\u00e1tka, kterou mo\u017en\u00e1 ani nezn\u00e1te","description":"Skoro v\u0161ichni v\u00edme, \u017ee uhl\u00edk se m\u016f\u017ee v p\u0159\u00edrod\u011b vyskytovat v r\u016fzn\u00fdch form\u00e1ch, barv\u00e1ch a tvarech, a ka\u017ed\u00e1 z nich m\u00e1 n\u011bjak\u00e9 sv\u00e9 vlastnosti, kter\u00e9 jsou pro n\u011b charakteristick\u00e9. Mezi&hellip;<a href=\"https:\/\/www.rasheeba.cz\/grafen-neuveritelna-latka-kterou-mozna-ani-neznate\/\" class=\"more-link\"><span class=\"more-button\">P\u0159e\u010d\u00edst<span class=\"screen-reader-text\">Grafen \u2013 neuv\u011b\u0159iteln\u00e1 l\u00e1tka, kterou mo\u017en\u00e1 ani nezn\u00e1te<\/span><\/span><\/a>","datePublished":"2020-03-27","dateModified":"2023-05-01","author":{"@type":"Person","@id":"https:\/\/www.rasheeba.cz\/author\/#Person","name":"","url":"https:\/\/www.rasheeba.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c065076eb86551fdb70725c8063acf1b60a8edaed14ed654228c4cba13121c83?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c065076eb86551fdb70725c8063acf1b60a8edaed14ed654228c4cba13121c83?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"rasheeba.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.rasheeba.cz\/wp-content\/uploads\/img_a373476_w4209_t1585031356.jpg","url":"https:\/\/www.rasheeba.cz\/wp-content\/uploads\/img_a373476_w4209_t1585031356.jpg","height":0,"width":0},"url":"https:\/\/www.rasheeba.cz\/grafen-neuveritelna-latka-kterou-mozna-ani-neznate\/","about":["Technika"],"wordCount":453,"articleBody":"Skoro v\u0161ichni v\u00edme, \u017ee uhl\u00edk se m\u016f\u017ee v p\u0159\u00edrod\u011b vyskytovat v r\u016fzn\u00fdch form\u00e1ch, barv\u00e1ch a tvarech, a ka\u017ed\u00e1 z nich m\u00e1 n\u011bjak\u00e9 sv\u00e9 vlastnosti, kter\u00e9 jsou pro n\u011b charakteristick\u00e9. Mezi n\u011b t\u0159eba pat\u0159\u00ed velice kr\u00e1sn\u00fd a drah\u00fd diamant nebo b\u011b\u017en\u00fd a pom\u011brn\u011b netrval\u00fd grafit. Jen\u017ee existuje je\u0161t\u011b grafen, kter\u00fd je m\u00e9n\u011b zn\u00e1my a zdaleka nem\u00e1 takov\u00e9 schopnosti jako d\u0159\u00edve zm\u00edn\u011bn\u00ed. Za objevitel\u00e9 t\u00e9to \u00fa\u017easn\u00e9 substance jsou pova\u017eov\u00e1ni dva ru\u0161t\u00ed v\u011bdci, Andre Geim a Konstantin Novoselov, kter\u00fdm se v roce 2004 poda\u0159ilo tuto l\u00e1tku objevit, a to velmi zvl\u00e1\u0161tn\u00edm zp\u016fsobem \u2013 za pomoc\u00ed lep\u00edc\u00ed p\u00e1sky. Ve stejn\u00e9m roce za to dokonce byli i odm\u011bn\u011bni Nobelovou cenou. Jen\u017ee pravda je, \u017ee ji\u017e v 19. stolet\u00ed spousta chytr\u00fdch hlav se pokou\u0161ela z\u00edskat grafen z grafitu, ale bohu\u017eel nikdy se jim to nepoda\u0159ilo.  Jeho nejv\u00edce p\u0159ekvapivou vlastnost\u00ed je pru\u017enost a pevnost, kter\u00e1 p\u0159evy\u0161uje ocel dv\u011bst\u011bkr\u00e1t. P\u0159esn\u011b d\u00edky tomuto jsme schopni v dne\u0161n\u00ed dob\u011b vytv\u00e1\u0159et displeje chytr\u00fdch telefon\u016f, oble\u010den\u00ed nebo dokonce i letadla. Ke v\u0161emu je tato modifikace uhl\u00edku skv\u011bl\u00fdm vodi\u010dem elektrick\u00e9ho proudu a odpor je opravdu minim\u00e1ln\u00ed, d\u00edky \u010demu m\u016f\u017eeme m\u00edt po ruce velice praktick\u00e9 powerbanky, kter\u00e9 v\u011bt\u0161in\u011b z n\u00e1s ji\u017e mnohokr\u00e1t zachr\u00e1nily mnoho pracovn\u00edch setk\u00e1n\u00ed nebo \u0161koln\u00edch p\u0159edn\u00e1\u0161ek. Dal\u0161\u00ed jeho zaj\u00edmavou schopnost\u00ed je, m\u016f\u017eeme \u0159\u00edct, p\u0159\u00edrodn\u00ed anom\u00e1lie, jeliko\u017e za p\u016fsoben\u00ed chladu se roztahuje a za tepla se smr\u0161\u0165uje, co n\u00e1m dovoluje vytv\u00e1\u0159et dotykov\u00e9 displeje. Jedinou substanc\u00ed, kterou tato l\u00e1tka propou\u0161t\u00ed, je voda, d\u00edky \u010demu by \u0161lo bez probl\u00e9mu nap\u0159. desalinizovat tedy odsolovat mo\u0159skou vodu a prom\u011bnit ji na pitnou, co ur\u010dit\u011b bude se v budoucnosti hodit. Velmi zaj\u00edmav\u00fdm aspektem je to, jak tento mal\u00fd chemicko-technick\u00fd z\u00e1zrak pojmenovali lid\u00e9 na internetu, kte\u0159\u00ed \u010dirou n\u00e1hodou ho znaj\u00ed. Za\u010dali mu \u0159\u00edkat Venom \u2013 podle velmi charakteristick\u00e9 \u010dern\u00e9 barvy jednoho antihrdiny z marvelovsk\u00fdch komix\u016f. Pro\u010d grafen nen\u00ed tak popul\u00e1rn\u00ed a pro\u010d se tolik nepou\u017e\u00edv\u00e1? Je toti\u017e velice slo\u017eit\u00e9 ho dostat z grafitu v takov\u00e9m mno\u017estv\u00ed, aby ho \u0161lo pou\u017e\u00edvat masov\u011b. Prozat\u00edm mus\u00ed v\u011bdci p\u0159ij\u00edt s jednodu\u0161\u0161\u00ed, m\u00e9n\u011b komplikovanou, a hlavn\u011b rychlej\u0161\u00ed metodou jeho z\u00edsk\u00e1v\u00e1n\u00ed. A\u017e pot\u00e9 budeme moci mluvit o n\u011bjak\u00fdch z\u00e1zra\u010dn\u00fdch vyn\u00e1lezech.                                                                                                                                                                                                                                                                                                                                                                                         4.7\/5 - (9 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Grafen \u2013 neuv\u011b\u0159iteln\u00e1 l\u00e1tka, kterou mo\u017en\u00e1 ani nezn\u00e1te","item":"https:\/\/www.rasheeba.cz\/grafen-neuveritelna-latka-kterou-mozna-ani-neznate\/#breadcrumbitem"}]}]