{"id":10921,"date":"2024-08-27T10:23:34","date_gmt":"2024-08-27T08:23:34","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=10921"},"modified":"2024-09-02T09:11:17","modified_gmt":"2024-09-02T07:11:17","slug":"nanomateriaux-et-hydrogene-nicolas-javahiraly-seminaire-fermi-16-09-2024-11h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/nanomateriaux-et-hydrogene-nicolas-javahiraly-seminaire-fermi-16-09-2024-11h\/","title":{"rendered":"L\u2019\u00e9tude de nano mat\u00e9riaux pour l\u2019\u00e9laboration de nano capteurs optiques. Application \u00e0 la d\u00e9tection de fuites d\u2019hydrog\u00e8ne. &#8211; (Nicolas Javahiraly \/ FeRMI \/ S\u00e9minaire). &#8211; 6\/09\/2024, 11H"},"content":{"rendered":"<p><span style=\"font-size: 20px; color: #002e5d;\"><strong><span style=\"font-size: 24px;\">S\u00e9minaires d&rsquo;ouverture FeRMI<\/span><br \/>\n<\/strong><\/span><\/p>\n<p><strong>Nicolas Javahiraly, <\/strong> <span class=\"\"> Laboratoire de bio\u00e9lectrochimie et spectroscopie &#8211; Strasbourg<\/span><\/p>\n<p><span style=\"font-size: 20px; color: #191970;\"><strong>Abstract :<\/strong><\/span><br \/>\nVecteur d\u2019\u00e9nergie, l\u2019hydrog\u00e8ne est actuellement utilis\u00e9 dans diverses industries chimiques, pharmaceutiques, a\u00e9rospatiales. Dans le contexte de transition \u00e9nerg\u00e9tique actuel, son utilisation n\u2019est que grandissante dans les applications de production, de stockage ou de distribution. L\u2019industrie reposant sur l\u2019utilisation de l\u2019hydrog\u00e8ne gazeux rencontre des probl\u00e8mes de s\u00e9curit\u00e9 dus aux propri\u00e9t\u00e9s chimiques et physiques de ce gaz (inflammabilit\u00e9) d\u2019o\u00f9 la n\u00e9cessit\u00e9 d\u2019\u00e9laborer de nouveaux syst\u00e8mes de nano-d\u00e9tection ultrarapides et sensibles.<\/p>\n<p>De nouvelles configurations de capteurs originaux ont \u00e9t\u00e9 propos\u00e9es : par exemple, un capteur SPR (Surface Plasmon Resonance) fibr\u00e9 \u00e0 modulation de longueur d\u2019onde utilisant des nanocouches de Pd comme mat\u00e9riau sensible \u00e0 la d\u00e9tection du gaz. La zone sensible, d\u00e9pos\u00e9e sur le c\u0153ur d\u2019une fibre multimode, peut \u00eatre par exemple, une configuration MIM (Metal\/Insulator\/Metal) multicouches d\u2019argent, de silice et de palladium. La modulation spectrale de la lumi\u00e8re transmise par la fibre, bas\u00e9e sur un changement de permittivit\u00e9, permet la d\u00e9tection de l\u2019hydrog\u00e8ne. Une r\u00e9ponse plus fiable est alors envisag\u00e9e pour ce capteur SPR bas\u00e9 sur une modulation spectrale plut\u00f4t qu\u2019en intensit\u00e9. Les \u00e9paisseurs des diff\u00e9rentes couches d\u00e9finissent alors les performances du capteur. Une configuration optimale a alors \u00e9t\u00e9 obtenue et nous a laiss\u00e9 entrevoir un futur prometteur, notamment via des syst\u00e8mes \u00e0 base de nanoparticules et de nanostructures originales.<\/p>\n<p>D\u2019autres types de capteurs utilisant des nanoparticules et\/ou des r\u00e9seaux de nanoparticules de diff\u00e9rentes formes offrent \u00e9galement des performances tout \u00e0 fait comp\u00e9titives au regard des normes et des sp\u00e9cifications strictes dans diverses industries impliqu\u00e9es dans l\u2019\u00e9conomie de l\u2019hydrog\u00e8ne. Se pose alors la question de la faisabilit\u00e9 de nouveaux d\u00e9tecteurs ultrasensibles et tr\u00e8s r\u00e9actifs \u00e0 base de nanoobjets originaux qui nous ont incit\u00e9 \u00e0 entreprendre des \u00e9tudes in situ \u00e0 l\u2019\u00e9chelle nano-et subnanom\u00e9trique, afin de mieux comprendre les m\u00e9canismes mis en jeu lors de ces processus de d\u00e9tection<\/p>\n<hr \/>\n<div class=\"leaflet-map WPLeafletMap\" style=\"height:300px; width:70%;\"><\/div><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMapShortcode() {\/*<script>*\/\nvar baseUrl = atob('aHR0cHM6Ly97c30udGlsZS5vcGVuc3RyZWV0bWFwLm9yZy97en0ve3h9L3t5fS5wbmc=');\nvar base = (!baseUrl && window.MQ) ?\n    window.MQ.mapLayer() : L.tileLayer(baseUrl,\n        L.Util.extend({}, {\n            detectRetina: 0,\n        },\n        {\"subdomains\":\"abc\",\"noWrap\":false,\"maxZoom\":18}        )\n    );\n    var options = L.Util.extend({}, {\n        layers: [base],\n        attributionControl: false\n    },\n    {\"zoomControl\":true,\"scrollWheelZoom\":true,\"doubleClickZoom\":true,\"fitBounds\":true,\"minZoom\":9,\"maxZoom\":18,\"maxBounds\":null,\"attribution\":\"<a href=\\\"http:\\\/\\\/leafletjs.com\\\" title=\\\"Une biblioth\\u00e8que JS pour des cartes interactives\\\">Leaflet<\\\/a>; \\u00a9 <a href=\\\"http:\\\/\\\/www.openstreetmap.org\\\/copyright\\\">OpenStreetMap<\\\/a> contributeurs\"},\n    {});\nwindow.WPLeafletMapPlugin.createMap(options).setView([43.560830727361,1.4672373725804],16);window.WPLeafletMapPlugin.createScale({});});<\/script>\n<script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMarkerShortcode() {\/*<script>*\/\nvar map = window.WPLeafletMapPlugin.getCurrentMap();\nvar group = window.WPLeafletMapPlugin.getCurrentGroup();\nvar marker_options = window.WPLeafletMapPlugin.getIconOptions({});\nvar marker = L.marker(\n    [0,0],\n    marker_options\n);\nvar is_image = map.is_image_map;\n    marker.setLatLng( map.getCenter() );\nif (marker_options.draggable) {\n    marker.on('dragend', function () {\n        var latlng = this.getLatLng();\n        var lat = latlng.lat;\n        var lng = latlng.lng;\n        if (is_image) {\n            console.log('leaflet-marker y=' + lat + ' x=' + lng);\n        } else {\n            console.log('leaflet-marker lat=' + lat + ' lng=' + lng);\n        }\n    });\n}\nmarker.addTo( group );\nmarker.bindPopup(window.WPLeafletMapPlugin.unescape('Salle de conf\u00e9rence (- B\u00e2timent 3R4)'));window.WPLeafletMapPlugin.markers.push( marker );\n        });<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Nicolas Javahiraly : Laboratoire de bio\u00e9lectrochimie et spectroscopie &#8211; Strasbourg<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,307,233],"class_list":["post-10921","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-fermisem","tribe_events_cat-seminars","cat_events","cat_fermisem","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L\u2019\u00e9tude de nano mat\u00e9riaux pour l\u2019\u00e9laboration de nano capteurs optiques. 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