{"id":4779,"date":"2021-07-08T16:42:12","date_gmt":"2021-07-08T19:42:12","guid":{"rendered":"https:\/\/sbfisica.org.br\/v1\/sbf\/2021\/07\/08\/estudo-determina-propriedades-termodinamicas-de-nanofios-de-carbono\/"},"modified":"2022-08-16T01:21:19","modified_gmt":"2022-08-16T04:21:19","slug":"estudo-determina-propriedades-termodinamicas-de-nanofios-de-carbono","status":"publish","type":"post","link":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/estudo-determina-propriedades-termodinamicas-de-nanofios-de-carbono\/","title":{"rendered":"Estudo determina propriedades termodin\u00e2micas de nanofios de carbono"},"content":{"rendered":"<p><img decoding=\"async\" data-src=\"images\/destaque-em-fisica\/2021\/destaque-2021-07-08.jpg\" alt=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" \/>Um nanomaterial capaz de suportar temperaturas e outras condi\u00e7\u00f5es extremas, como as de um foguete termonuclear, as cadeias lineares de carbono s\u00e3o mol\u00e9culas compostas de \u00e1tomos de carbono distribu\u00eddos ao longo de uma linha. Em artigo publicado na Physical Review Letters, a f\u00edsica Nathalia Leal Costa, da Universidade Federal do Cear\u00e1 (UFC), e uma equipe internacional de pesquisadores, determinaram as propriedades termodin\u00e2micas universais de cadeias lineares de carbono formadas no interior de nanotubos de carbono.<\/p>\n<p><!--more--><\/p>\n<p><span style=\"background-color: inherit; color: inherit; font-family: inherit; font-size: 1rem;\">O estudo foi coordenado pelos f\u00edsicos Paulo Ara\u00fajo, da Universidade do Alabama, Estados Unidos, Alexandre Pascoal, da UFC, e Newton Martins, da Universidade Federal do Par\u00e1 (UFPA), al\u00e9m de contar com a participa\u00e7\u00e3o de colaboradores da Coreia do Sul e do Jap\u00e3o.\u00a0<\/span><\/p>\n<p>&#8220;Essas cadeias s\u00e3o est\u00e1veis quando sintetizadas em nanotubos de carbono&#8221;, Nathalia explica no v\u00eddeo. &#8220;Nosso estudo foi realizado em dois sistemas diferentes, dentro de nanotubos de paredes m\u00faltiplas e de paredes duplas.&#8221;<\/p>\n<p><iframe style=\"display: block; margin-left: auto; margin-right: auto;\" title=\"YouTube video player\" data-src=\"https:\/\/www.youtube.com\/embed\/5Cx6ocdHJhg\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe><\/p>\n<p>Observadas por meio da espectroscopia Raman, essas cadeias lineares de carbono apresentam a chamada banda C, em torno de 1850 cm-1. Nathalia e seus colegas analisaram te\u00f3rica e experimentalmente varia\u00e7\u00f5es da banda C com a temperatura, mostrando ser poss\u00edvel descrever suas propriedades termodin\u00e2micas usando o chamado formalismo de Debye, para temperaturas de at\u00e9 700 Kelvin. &#8220;As grandezas termodin\u00e2micas dessas cadeias s\u00e3o independentes do tamanho da cadeia e tamb\u00e9m do ambiente aonde essas cadeias s\u00e3o sintetizadas&#8221;, explica a f\u00edsica. &#8220;Portanto essas grandezas seguem leis universais com a temperatura.&#8221;<\/p>\n<p>O trabalho foi realizado com apoio do <a href=\"\/v1\/sbf\/programa-de-intercambio-brasil-eua-setima-chamada\/\">Programa de Interc\u00e2mbio<\/a> entre a Sociedade Brasileira de F\u00edsica e a American Physical Society (APS).<\/p>\n<p><strong>Artigo cient\u00edfico<\/strong><br \/>\nThermodynamics of Linear Carbon Chains<br \/>\n<span style=\"background-color: inherit; color: inherit; font-family: inherit; font-size: 1rem;\">Nathalia L. Costa, Keshav Sharma, Yoong Ahm Kim, Go Bong Choi, Morinobu Endo, Newton M. Barbosa Neto, Alexandre R. Paschoal e Paulo T. Araujo<br \/>\n<\/span><a href=\"https:\/\/doi.org\/10.1103\/PhysRevLett.126.125901\">Phys. Rev. Lett. 126, 125901 \u2013 26 de mar\u00e7o de 2021\u00a0<\/a><\/p>\n<p><strong>Contato para imprensa<\/strong><br \/>\nIgor Zolnerkevic<br \/>\nAssessor de comunica\u00e7\u00e3o<br \/>\n<span id=\"cloakaea3a6d92c0b296f2c2656f3e15e66ed\"><span id=\"cloak36935a41aed49900fdfcd0ccc07756b0\"><span id=\"cloak1d0784f7944e77e5959d8acb3f4f841c\"><span id=\"cloak260329287650011057a9ea428c5d9667\"><span id=\"cloak70b06bc3011fdfd0bf25446e0b7febc2\"><span id=\"cloak6e91b9d3f8e87e4bc1b0aa101ab4faec\"><span id=\"cloakb4fb8d6e48379e9da5bb6f643ced88ca\"><span id=\"cloak0cafab7efee5686b4649f627df782102\"><span id=\"cloak16ea127c092c7641257ee108a4c02db5\"><span id=\"cloakbfb02956d181edbfde48338c6a26de04\"><span id=\"cloakdd2ffa7fbe353844aa302ac5b56c9d8d\"><span id=\"cloakcd6a2f8ba9c58f7915cd9858e4f6715b\"><span id=\"cloak7881b31ca4ca8c858bca5deda2759490\"><span id=\"cloaka1b234b5c1312839e9cb5149440f93dd\"><span id=\"cloakb46904c0dd26640555168eca35cf687e\"><span id=\"cloakab8a18b4788575a2fb004defede27223\"><span id=\"cloak3f76891238eeb85532c45d02f957727b\"><span id=\"cloak796eff52e85be4a4e9ac2d01e9770468\"><span id=\"cloak6c56a3169aedb00255530523c37f5ec6\"><span id=\"cloakf41b17c1fe162429965acf86a7a78745\"><span id=\"cloak99ca8e9374ab3f18d1379a33a136f095\"><span id=\"cloak32959540776525133bfda097c265956b\"><span id=\"cloak7c02ed46096391dc385965f86dbb9b24\"><span id=\"cloak3f6811053eb0e17d0e2b74919f51301a\"><span id=\"cloak258520f4717194dfc5d747907002c8f9\"><span id=\"cloakbd34a7c5e2bc2056fbee4aa77336bf6e\"><span id=\"cloak8eb44673fab2d827335949b56922b578\"><span id=\"cloak3b09f6b02815b1b1bec4750f39cb0880\"><span id=\"cloak86f5967951bde189a5c4a9a3a69df955\"><span id=\"cloak2b6ead48b2ab51e24efa86744faced80\"><span id=\"cloak18ea95729e7614f61f1c72ba9b73e4e5\"><span id=\"cloaka0031e32f0a8f748392f51856e99c354\"><span id=\"cloak41aa5aa49439d923ae5da3b418049dd8\"><span id=\"cloake1f52b7df2a60539b685b55ddbbd38ca\"><span id=\"cloak9b27e74b5f374c2634667b2bdf86d600\"><span id=\"cloakef6eba96fa77e934b1b62395c9bb3275\"><span id=\"cloakec13b66700c047076a55319d3418e15c\"><span id=\"cloakf08c39a763a17019adcc3a0246597f03\"><span id=\"cloakff810a6b774139f21b0128c4c4c6584f\"><span id=\"cloakccac4f890f002320b759eb1e9b915b4e\"><span id=\"cloak256c6aebf3beef560a35e2f1301b3e23\"><span id=\"cloak8c795a67310efc0ad4167c3825a142e2\"><span id=\"cloak18c514794cbfaf5fb17b5a19f5eb9c6c\"><span id=\"cloakc981a0dfe692b813ecf3df3fc33c9719\"><a href=\"mailto:comunicacao@sbfisica.org.br\">comunicacao@sbfisica.org.br<\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um nanomaterial capaz de suportar temperaturas e outras condi\u00e7\u00f5es extremas, como as de um foguete termonuclear, as cadeias lineares de carbono s\u00e3o mol\u00e9culas compostas de \u00e1tomos de carbono distribu\u00eddos ao longo de uma linha. Em artigo publicado na Physical Review Letters, a f\u00edsica Nathalia Leal Costa, da Universidade Federal do Cear\u00e1 (UFC), e uma equipe [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":16933,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[124],"tags":[],"class_list":["post-4779","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-destaque-em-fisica"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/4779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/comments?post=4779"}],"version-history":[{"count":2,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/4779\/revisions"}],"predecessor-version":[{"id":16935,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/4779\/revisions\/16935"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/media\/16933"}],"wp:attachment":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/media?parent=4779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/categories?post=4779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/tags?post=4779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}