{"id":158,"date":"2009-05-25T13:20:37","date_gmt":"2009-05-25T11:20:37","guid":{"rendered":"https:\/\/webs.uab.cat\/gnam\/research\/"},"modified":"2025-07-17T12:27:24","modified_gmt":"2025-07-17T10:27:24","slug":"research","status":"publish","type":"page","link":"https:\/\/webs.uab.cat\/gtnam\/research\/","title":{"rendered":"Research"},"content":{"rendered":"\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"><a href=\"nanocalorimetry\">Nanocalorimetry<\/a><\/h2>\n\n\n\n<p>The group is largely involved in nanocalorimetric analysis of low dimensional systems aiming to analyze thermodynamics and kinetics playing a role in phase transitions occurring in thin and ultrathin films or nanostructured materials.<\/p>\n\n\n\n<p>We use membrane-based nanocalorimetry at very fast heating rates (10<sup>4<\/sup> &#8211; 10<sup>5<\/sup> K\/s), a technique developed by Les Allen at the University of Illinois.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/grupsderecerca.uab.cat\/gnam\/sites\/grupsderecerca.uab.cat.gnam\/files\/images\/nanocalorimetres.png\" alt=\"Nanocalorimeter sketch\" \/><\/figure>\n\n\n\n<p>3D representation of a nanocalorimeter viewed from top and bottom..<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"><a href=\"thermal-transport-and-thermoelectricity-nanosystems\">Thermal transport and thermoelectricity<\/a><\/h2>\n\n\n\n<p>Thermal conductivity measurements in thin films (semiconductors,superlattices, oxides) or arrays of nanowires embedded in templates is carried out using home-made 3\u03c9 setups. Individual nanowires of different shapes and materials and ultrathin membranes are measured using suspended structures.<\/p>\n\n\n\n<p>Another activity of the group is the micro(nano)fabrication of thermoelectric devices for microgeneration in portable applications.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/grupsderecerca.uab.cat\/gnam\/sites\/grupsderecerca.uab.cat.gnam\/files\/images\/suspended-structure-SEM-ret.png\" alt=\"Suspended structure\" \/><\/figure>\n\n\n\n<p>SEm image showing a suspended structure employed to measure the thermal conductivity of a 17.5 nm thick monocrystalline layer.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"><a href=\"ultrastable-glasses\">Ultrastable glasses<\/a><\/h2>\n\n\n\n<p>Since 2008 GNaM is devoted to the study of ultrastable glass formation via vapor-deposition at temperatures in the vicinity of the glass transition temperature. The field started in 2007 with the discovery by Ediger\u2019s group of ultrastability in various pharmaceutical compounds grown from the vapor. This subject is rapidly gaining interest in the glass community and ultrastable glass formation has been extended to many molecules and materials, including small and medium size organic molecules, polymers and metallic glasses. The increased of stability is traced-back to enhanced molecular mobility at the surface. Molecules grown from the vapor have time to explore lower positions of the energy landscape before being buried by other molecules.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/grupsderecerca.uab.cat\/gnam\/sites\/grupsderecerca.uab.cat.gnam\/files\/images\/JNCS-stabilities-cxib.jpg\" alt=\"Ultrastable glasses of celecoxib\" \/><\/figure>\n\n\n\n<p>Specific heat capacity of glasses of celecoxib with different stability prepared by PVD.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Nanocalorimetry The group is largely involved in nanocalorimetric analysis of low dimensional systems aiming to analyze thermodynamics and kinetics playing a role in phase transitions occurring in thin and ultrathin films or nanostructured materials. We use membrane-based nanocalorimetry at very fast heating rates (104 &#8211; 105 K\/s), a technique developed by Les Allen at the [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-158","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/pages\/158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/comments?post=158"}],"version-history":[{"count":2,"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/pages\/158\/revisions"}],"predecessor-version":[{"id":1267,"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/pages\/158\/revisions\/1267"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/gtnam\/wp-json\/wp\/v2\/media?parent=158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}