{"id":6687,"date":"2025-10-13T11:15:42","date_gmt":"2025-10-13T09:15:42","guid":{"rendered":"https:\/\/www.mines-stetienne.fr\/lgf\/?p=6687"},"modified":"2025-10-13T11:15:44","modified_gmt":"2025-10-13T09:15:44","slug":"soutenance-de-these-bastien-le-porcher-20-octobre-2025","status":"publish","type":"post","link":"https:\/\/www.mines-stetienne.fr\/lgf\/soutenance-de-these-bastien-le-porcher-20-octobre-2025\/","title":{"rendered":"Soutenance de th\u00e8se &#8211; Bastien Le Porcher &#8211; 20 octobre 2025"},"content":{"rendered":"\n<p>La soutenance de th\u00e8se de Bastien Le Porcher aura lieu le lundi 20 octobre 2025 \u00e0 10h30 dans l\u2019amphith\u00e9\u00e2tre F1 de l\u2019\u00c9cole des Mines de Saint-\u00c9tienne.<\/p>\n\n\n\n<p>La th\u00e8se sera pr\u00e9sent\u00e9e devant un jury compos\u00e9 de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>H\u00e9l\u00e8ne DEBEDA<\/strong>,\u00a0Professeur des Universit\u00e9s HDR, Universit\u00e9 de Bordeaux (Examinatrice)<\/li>\n\n\n\n<li><strong>Beno\u00eet PIRO<\/strong>, Professeur des Universit\u00e9s HDR, Universit\u00e9 de Paris Cit\u00e9 (Rapporteur)<\/li>\n\n\n\n<li><strong>Jean-Baptiste SANCHEZ<\/strong>, Professeur des Universit\u00e9s HDR, Universit\u00e9 de Besan\u00e7on (Rapporteur)<\/li>\n\n\n\n<li><strong>Mathilde RIEU<\/strong>,\u00a0Charg\u00e9 de Recherche, Mines Saint-\u00c9tienne (Directrice de th\u00e8se)<\/li>\n\n\n\n<li><strong>Jean-Paul VIRICELLE<\/strong>, Directeur de Recherche, Mines Saint-\u00c9tienne (Directeur de th\u00e8se)<\/li>\n<\/ul>\n\n\n\n<p>La soutenance sera suivie d&#8217;un pot.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sum\u00e9\u00a0:\u00a0<\/h2>\n\n\n\n<p>Les capteurs de gaz sont de nos jours n\u00e9cessaires pour la d\u00e9tection de gaz inflammables, toxiques ou polluants. De nombreux dispositifs de d\u00e9tection de gaz ont \u00e9t\u00e9 d\u00e9velopp\u00e9s, un des plus \u00e9tudi\u00e9s est le capteur \u00e0 base d\u2019oxyde m\u00e9tallique semi-conducteur, notamment \u00e0 base de SnO<sub>2<\/sub>. Ces capteurs sont compos\u00e9s d\u2019un \u00e9l\u00e9ment sensible en SnO<sub>2<\/sub>, d\u2019\u00e9lectrodes conductrices en or et d\u2019une r\u00e9sistance en platine, n\u00e9cessaire pour atteindre les temp\u00e9ratures de travail, aux alentours de 350\u00b0C. Bien que l\u2019encre utilis\u00e9e pour imprimer l\u2019\u00e9l\u00e9ment sensible soit d\u00e9velopp\u00e9e dans notre laboratoire, les \u00e9lectrodes et \u00e9l\u00e9ments chauffants \u00e9taient jusque-l\u00e0 fabriqu\u00e9s \u00e0 partir d\u2019encres m\u00e9talliques commerciales. Les encres commerciales sont ch\u00e8res, peuvent avoir des probl\u00e8mes de reproductibilit\u00e9 entre les lots et sont de compositions inconnues, ce qui peut alt\u00e9rer ou modifier les r\u00e9ponses aux gaz des capteurs de par la pr\u00e9sence de fondants et d\u2019oxydes m\u00e9talliques. Pour pallier ces probl\u00e8mes, des encres d\u2019or et de platine ont \u00e9t\u00e9 formul\u00e9es pour la fabrication de capteur. Pour l\u2019impression jet d\u2019encre, des encres d\u2019or et de platine \u00e0 base de nanoparticules en suspension ou de pr\u00e9curseur solubilis\u00e9s en solution ont \u00e9t\u00e9 d\u00e9velopp\u00e9es. Les nanoparticules d\u2019or sont synth\u00e9tis\u00e9es \u00e0 partir d\u2019une m\u00e9thode de Turkevich optimis\u00e9e pour notre application, tandis que les nanoparticules de platine sont synth\u00e9tis\u00e9es par voie polyols. Ces nanoparticules en solution sont m\u00e9lang\u00e9es avec des solvants comme le glyc\u00e9rol, l\u2019\u00e9thyl\u00e8ne glycol, l\u2019eau ou le propan-2-ol afin d\u2019obtenir des encres. Apr\u00e8s optimisation des param\u00e8tres de d\u00e9p\u00f4t sur du polyimide et du traitement thermique, des \u00e9lectrodes sont obtenues. Ce capteur imprim\u00e9 avec nos encres sur un substrat souple a \u00e9t\u00e9 expos\u00e9 \u00e0 des gaz, le CO et le NO<sub>2<\/sub>, et montre des r\u00e9ponses similaires \u00e0 un capteur imprim\u00e9 avec des encres commerciales. Pour l\u2019impression par s\u00e9rigraphie, des poudres d\u2019or et de platine ont \u00e9t\u00e9 synth\u00e9tis\u00e9es gr\u00e2ce \u00e0 la r\u00e9duction des pr\u00e9curseurs par l\u2019acide ascorbique. Les synth\u00e8ses ont \u00e9t\u00e9 optimis\u00e9es pour obtenir des particules d\u2019un diam\u00e8tre d\u2019environ 1 micron afin de passer \u00e0 travers les mailles des masques de s\u00e9rigraphie. Ces poudres, m\u00e9lang\u00e9es avec du terpin\u00e9ol et de l\u2019ethylcellulose, permettent d\u2019obtenir des encres de s\u00e9rigraphie pour l\u2019impression d\u2019\u00e9lectrode et d\u2019\u00e9l\u00e9ment chauffant. La fabrication d\u2019un capteur complet avec nos encres a permis d\u2019obtenir des r\u00e9ponses au gaz similaires \u00e0 un capteur de r\u00e9f\u00e9rence imprim\u00e9 avec des encres commerciales, montrant la faisabilit\u00e9 de nos capteurs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La soutenance de th\u00e8se de Bastien Le Porcher aura lieu le lundi 20 octobre 2025 \u00e0 10h30 dans l\u2019amphith\u00e9\u00e2tre F1 de l\u2019\u00c9cole des Mines de Saint-\u00c9tienne. La th\u00e8se sera pr\u00e9sent\u00e9e devant un jury compos\u00e9 de : La soutenance sera suivie d&#8217;un pot. R\u00e9sum\u00e9\u00a0:\u00a0 Les capteurs de gaz sont de nos jours n\u00e9cessaires pour la d\u00e9tection&hellip;<\/p>\n","protected":false},"author":1474,"featured_media":6688,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"5980,6624,6272,6425,6473,6463","_relevanssi_noindex_reason":"","footnotes":""},"categories":[21],"tags":[35],"post_series":[],"class_list":["post-6687","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-slide-home","entry","has-media"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","pp_force_visibility":null,"pp_subpost_visibility":null,"pp_inherited_force_visibility":null,"pp_inherited_subpost_visibility":null,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Soutenance de th\u00e8se - Bastien Le Porcher - 20 octobre 2025 - Laboratoire Georges Friedel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mines-stetienne.fr\/lgf\/soutenance-de-these-bastien-le-porcher-20-octobre-2025\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soutenance de th\u00e8se - Bastien Le Porcher - 20 octobre 2025 - Laboratoire Georges Friedel\" \/>\n<meta property=\"og:description\" content=\"La soutenance de th\u00e8se de Bastien Le Porcher aura lieu le lundi 20 octobre 2025 \u00e0 10h30 dans l\u2019amphith\u00e9\u00e2tre F1 de l\u2019\u00c9cole des Mines de Saint-\u00c9tienne. La th\u00e8se sera pr\u00e9sent\u00e9e devant un jury compos\u00e9 de : La soutenance sera suivie d&#8217;un pot. 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