{"id":1248,"date":"2024-12-13T13:42:34","date_gmt":"2024-12-13T13:42:34","guid":{"rendered":"https:\/\/phys.usm.md\/?p=1248"},"modified":"2024-12-13T13:42:34","modified_gmt":"2024-12-13T13:42:34","slug":"cercetare-inovatoare-care-dezvaluie-o-conductivitate-termica-ultra-scazuta-in-nanofirele-de-germaniu","status":"publish","type":"post","link":"https:\/\/phys.usm.md\/?p=1248","title":{"rendered":"Cercetare inovatoare, care dezv\u0103luie o conductivitate termic\u0103 ultra-sc\u0103zut\u0103 \u00een nanofirele de germaniu"},"content":{"rendered":"<p style=\"text-align: justify;\">[Chi\u0219in\u0103u, Moldova] \u2014 13 decembrie 2024 \u2014 Un studiu publicat \u00een revista <strong>Physics of the Solid State<\/strong> prezint\u0103 descoperiri referitoare la propriet\u0103\u021bile termice ale nanofirelor de germaniu, av\u00e2nd implica\u021bii semnificative pentru viitorul nanoelectronicii \u0219i materialelor termolectrice. Articolul, \u00eentitulat: \u201cUltra-Low Thermal Conductivity of Germanium Nanowires\u201d \/ \u201eConductivitatea termic\u0103 ultra-sc\u0103zut\u0103 a nanofirelor de germaniu\u201d, analizeaz\u0103 comportamentul fononilor \u0219i transportul termic \u00een nanofire cu sec\u021biuni transversale p\u0103trate, grosimea lor variind \u00eentre 2,26 nm \u0219i 27,72 nm. Folosind modele teoretice avansate \u0219i ecua\u021bia de transport Boltzmann, cercetarea demonstreaz\u0103, c\u0103 conductivitatea termic\u0103 a acestor nanofire este de p\u00e2n\u0103 la 20 de ori mai mic\u0103 dec\u00e2t cea a germaniului cristalin \u00een stare brut\u0103.<br \/>\nRezultate cheie:<\/p>\n<ul style=\"text-align: justify;\">\n<li>Conductivitatea termic\u0103 ultra-sc\u0103zut\u0103 rezult\u0103 din efectele de confinare spa\u021bial\u0103 asupra spectrelor de energie ale fononilor \u0219i din intensificarea dispersiei fononilor pe frontierele structurii datorit\u0103 rugozit\u0103\u021bii suprafe\u021bei.<\/li>\n<li>Simul\u0103rile teoretice prezic \u00eenc\u0103lzirea localizat\u0103 \u00een filmele poroase de germaniu, cu temperaturi care ating 950 K, \u00een concordan\u021b\u0103 cu datele experimentale ob\u021binute prin spectroscopia Raman.<\/li>\n<li>\u00a0Descoperirile date deschid noi perspective pentru optimizarea managementului termic \u00een dispozitive la scar\u0103 micro \u0219i nano.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">\u201eAceast\u0103 cercetare demonstreaz\u0103 poten\u021bialul neexploatat al nanofirelor de germaniu \u00een aplica\u021biile care necesit\u0103 un control precis al c\u0103ldurii,\u201d a declarat <strong>dr. hab. Nica Deni<\/strong>s, cercet\u0103torul principal al studiului. \u201eRezultatele noastre confirm\u0103 rolul esen\u021bial al dimensiunilor materialelor \u0219i al caracteristicilor suprafe\u021bei \u00een ajustarea conductivit\u0103\u021bii termice, deschiz\u00e2nd calea pentru inova\u021bii \u00een termolectricitate \u0219i nanoelectronic\u0103.\u201d<br \/>\nStudiul subliniaz\u0103, de asemenea, importan\u021ba manipul\u0103rii propriet\u0103\u021bilor nanostructurilor pentru a dezvolta materiale eficiente energetic, destinate tehnologiilor de genera\u021bie nou\u0103. Aceste rezultate ar putea influen\u021ba designul dispozitivelor avansate, pentru care controlul termic este crucial, cum ar fi cip-urile de calcul de \u00eenalt\u0103 performan\u021b\u0103, senzorii \u0219i sistemele de recuperare a energiei.<br \/>\nArticolul complet este disponibil la link-ul <a href=\"https:\/\/link.springer.com\/article\/10.1134\/S1063783424601127\">https:\/\/link.springer.com\/article\/10.1134\/S1063783424601127<\/a> .<br \/>\n<strong>Despre revist\u0103:<\/strong> Physics of the Solid State este o revist\u0103 interna\u021bional\u0103, dedicat\u0103 celor mai recente dezvolt\u0103ri \u00een fizic\u0103 \u0219i aplica\u021biile materialelor \u00een starea solid\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Chi\u0219in\u0103u, Moldova] \u2014 13 decembrie 2024 \u2014 Un studiu publicat \u00een revista Physics of the Solid State prezint\u0103 descoperiri referitoare la propriet\u0103\u021bile termice ale nanofirelor de germaniu, av\u00e2nd implica\u021bii semnificative pentru viitorul nanoelectronicii \u0219i materialelor termolectrice. Articolul, \u00eentitulat: \u201cUltra-Low Thermal Conductivity of Germanium Nanowires\u201d \/ \u201eConductivitatea termic\u0103 ultra-sc\u0103zut\u0103 a nanofirelor de germaniu\u201d, analizeaz\u0103 comportamentul fononilor&hellip; <br \/> <a class=\"read-more\" href=\"https:\/\/phys.usm.md\/?p=1248\">Cite\u0219te mai mult<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1248","post","type-post","status-publish","format-standard","hentry","category-noutati"],"rttpg_featured_image_url":null,"rttpg_author":{"display_name":"","author_link":"https:\/\/phys.usm.md\/?author=2"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/phys.usm.md\/?cat=3\" rel=\"category\">Nout\u0103\u021bi<\/a>","rttpg_excerpt":"[Chi\u0219in\u0103u, Moldova] \u2014 13 decembrie 2024 \u2014 Un studiu publicat \u00een revista Physics of the Solid State prezint\u0103 descoperiri referitoare la propriet\u0103\u021bile termice ale nanofirelor de germaniu, av\u00e2nd implica\u021bii semnificative pentru viitorul nanoelectronicii \u0219i materialelor termolectrice. Articolul, \u00eentitulat: \u201cUltra-Low Thermal Conductivity of Germanium Nanowires\u201d \/ \u201eConductivitatea termic\u0103 ultra-sc\u0103zut\u0103 a nanofirelor de germaniu\u201d, analizeaz\u0103 comportamentul fononilor&hellip;&hellip;","_links":{"self":[{"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/posts\/1248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/phys.usm.md\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1248"}],"version-history":[{"count":1,"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/posts\/1248\/revisions"}],"predecessor-version":[{"id":1249,"href":"https:\/\/phys.usm.md\/index.php?rest_route=\/wp\/v2\/posts\/1248\/revisions\/1249"}],"wp:attachment":[{"href":"https:\/\/phys.usm.md\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phys.usm.md\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phys.usm.md\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}