{"id":46448,"date":"2021-07-01T13:54:09","date_gmt":"2021-07-01T11:54:09","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=46448"},"modified":"2021-07-20T08:57:53","modified_gmt":"2021-07-20T06:57:53","slug":"thermal-conductivity-of-benzothieno-benzothiophene-derivatives-at-the-nanoscale","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/thermal-conductivity-of-benzothieno-benzothiophene-derivatives-at-the-nanoscale.html","title":{"rendered":"Thermal conductivity of benzothieno-benzothiophene derivatives on a nanometric scale"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_37_mk2ylfbto6dh\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" 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style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:300px;height:30px;left:0px;top:231px;color:#ffffff;line-height:32px;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\"><i class=\"fa fa-user-circle\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>GROUPE DE RECHERCHE : NCM<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-46448'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-14de9786d47ec070c7c95c4ed851af57\">\n#top .av-special-heading.av-av_heading-14de9786d47ec070c7c95c4ed851af57{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-av_heading-14de9786d47ec070c7c95c4ed851af57 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-14de9786d47ec070c7c95c4ed851af57 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-14de9786d47ec070c7c95c4ed851af57 av-special-heading-h3 blockquote modern-quote modern-centered  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Thermal conductivity of benzothieno-benzothiophene derivatives on a nanometric scale<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<div  class='hr av-lbxvw0-bfed530996f38a00ba093856ce665002 hr-default  avia-builder-el-2  el_after_av_heading  el_before_av_one_full'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ngonrk-8d581c6dd83ce5ca1d982e0ae199552e\">\n.flex_column.av-ngonrk-8d581c6dd83ce5ca1d982e0ae199552e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-ngonrk-8d581c6dd83ce5ca1d982e0ae199552e av_one_full  avia-builder-el-3  el_after_av_hr  el_before_av_one_half  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-kqkunjsa-cc299c7e9d5c4adc3d1dd56873cacb60'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/07\/thermal_conductivity3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-46449 alignleft\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/07\/thermal_conductivity3-300x252.jpg\" alt=\"\" width=\"300\" height=\"252\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/07\/thermal_conductivity3-300x252.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/07\/thermal_conductivity3-14x12.jpg 14w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/07\/thermal_conductivity3.jpg 471w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div><strong><span class=\"Aucun\"><span lang=\"EN-US\">Thermal phenomena on nano-objects can be measured quantitatively and observed on a nanometric scale thanks to the <i>Scanning Thermal Microscope<\/i>. Using this local probe microscope, we are able to differentiate the thermal conductivity of nanometre-thick films made of two types of molecules of the same type.<\/span><span lang=\"IT\">my family.<\/span><span lang=\"EN-US\"> This experimental and theoretical study makes it possible to correlate thermal conductivity with the atomic structure of molecules and their organisation in a thin film.<\/span><\/span><\/strong><\/div>\n<\/blockquote>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3yuvv4-87333a2966b8e530e5ec25d0a356aa89\">\n.flex_column.av-3yuvv4-87333a2966b8e530e5ec25d0a356aa89{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-3yuvv4-87333a2966b8e530e5ec25d0a356aa89 av_one_half  avia-builder-el-5  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-kqkuq78e-934660e1c87344ba092ce3e6c84602c0'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-89879437769697fc1147f94808cb05bc\">\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc{\ncolor:#800000;\nborder-color:#800000;\n}\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc .av-icon-char{\nfont-size:18px;\nline-height:18px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-89879437769697fc1147f94808cb05bc avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue871' data-av_iconfont='entypo-fontello' ><\/span><\/span>There is growing interest in measuring thermal properties at the nanometre scale to characterise nano-objects (individual molecules, monolayers, 2D materials or 1D materials), but also to monitor the operation of nano-electronic components (transistors). We used the Scanning Thermal Microscope (SThM), a microscope from the large family of local probe microscopes, to thermally characterise organic films with a thickness of between 40 and 400 nm on a nanometre scale. Two types of film were characterised, each consisting of a different molecule; one composed of four rings and named BTBT, the other molecule has in addition to BTBT two alkyl chains of 8 carbon atoms added on either side of the molecule (named C8-BTBT-C8).<\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-89879437769697fc1147f94808cb05bc\">\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc{\ncolor:#800000;\nborder-color:#800000;\n}\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc .av-icon-char{\nfont-size:18px;\nline-height:18px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-89879437769697fc1147f94808cb05bc avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue871' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<div><span class=\"Aucun\"><span lang=\"EN-US\">These molecules, which are not commercially available, have been <\/span><span lang=\"DA\">synth<\/span><span lang=\"EN-US\">developed by a partner chemist at the Universit\u00e9 Libre de Bruxelles (Belgium). Already known for their performance in organic transistors with electronic mobilities sometimes reaching 200 cm\u00b2 V<sup>-1<\/sup> s<sup>-1<\/sup>Here we explore the thermal properties of these promising molecules. Few studies have focused on their thermal properties, despite the fact that these molecules are good candidates for applications in thermoelectricity (low thermal conductivity).<\/span><\/span>.<\/div>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w6g3kg-fd0ad867b772e887d2d59f7fa7cd32f8\">\n.flex_column.av-w6g3kg-fd0ad867b772e887d2d59f7fa7cd32f8{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-w6g3kg-fd0ad867b772e887d2d59f7fa7cd32f8 av_one_half  avia-builder-el-9  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-kqkurjqo-27feb8ee9c40258576012148d04ac328'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-89879437769697fc1147f94808cb05bc\">\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc{\ncolor:#800000;\nborder-color:#800000;\n}\n.av_font_icon.av-13ewzjw-89879437769697fc1147f94808cb05bc .av-icon-char{\nfont-size:18px;\nline-height:18px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-89879437769697fc1147f94808cb05bc avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue871' data-av_iconfont='entypo-fontello' ><\/span><\/span><span class=\"Aucun\"><span lang=\"EN-US\">SThM studies of these materials enable us to<\/span><span lang=\"IT\">acc<\/span><span lang=\"EN-US\">\u00e9<\/span><span lang=\"DE\">der <\/span><span lang=\"EN-US\">Both the topography of the surface at nanometre scale and the thermal conductivity of the film at a precise point on the surface. This conductivity value is obtained directly after a calibration phase on samples of known thermal conductivity. BTBT and C8-BTBT films have thermal conductivities of 0.6 - 1.3 W m<sup>-1<\/sup> K<sup>-1<\/sup> and 0.3 - 0.7 W m<sup>-1<\/sup> K<sup>-1<\/sup> respectively, showing the impact of the alkyl chain on the vibration modes of the molecules and therefore on thermal conductivity. These differences in thermal conductivity were linked to the organisation of the molecules in the film using theoretical calculations carried out at the University of Mons (Belgium), the Catalan Institute of Nanosciences and Nanotechnologies (Barcelona, Spain) and the University of Cagliari (Italy). This work opens up opportunities for the use of SThM in nanotechnology, but also for the study of these organic materials for thermoelectricity.<\/span><\/span><\/p>\n<h5><strong><em>Find out more :<\/em><\/strong><\/h5>\n<p><a href=\"https:\/\/dx.doi.org\/10.1039\/D0NR08619C\" target=\"_blank\" rel=\"noopener\">https:\/\/dx.doi.org\/10.1039\/D0NR08619C<\/a><br \/>\n<a href=\"https:\/\/hal.archives-ouvertes.fr\/hal-03135025v1\" target=\"_blank\" rel=\"noopener\">https:\/\/hal.archives-ouvertes.fr\/hal-03135025v1<\/a><\/p>\n<p><div  class='avia-button-wrap av-rpqvoq-ce71a200ccc6eb557c878e1cb6ad0269-wrap avia-button-left  avia-builder-el-12  el_after_av_font_icon  el_before_av_button'><a href='mailto:dominique.vuillaume@iemn.fr'  class='avia-button av-rpqvoq-ce71a200ccc6eb557c878e1cb6ad0269 av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"Dominique Vuillaume\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Dominique Vuillaume<\/span><\/a><\/div><br \/>\n<div  class='avia-button-wrap av-rpqvoq-8b9e6c233cdc81592c0d7696e56d9a4c-wrap avia-button-left  avia-builder-el-13  el_after_av_button  avia-builder-el-last'><a href='mailto:stephane.lenfant@iemn.fr'  class='avia-button av-rpqvoq-8b9e6c233cdc81592c0d7696e56d9a4c av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"Stephane Lenfant\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Stephane Lenfant<\/span><\/a><\/div><\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-46448","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/46448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=46448"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/46448\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=46448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=46448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=46448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}