{"id":487,"date":"2025-07-23T01:39:10","date_gmt":"2025-07-23T01:39:10","guid":{"rendered":"https:\/\/snowhouse.ca\/produit\/ac-sds-sds470-alternative-current-scanning-droplet-system\/"},"modified":"2025-11-14T15:39:17","modified_gmt":"2025-11-14T15:39:17","slug":"ac-sds-sds470-alternative-current-scanning-droplet-system","status":"publish","type":"product","link":"https:\/\/snowhouse.ca\/fr\/produit\/material-characterization\/scanning-electrochemical-workstation\/ac-sds-sds470-alternative-current-scanning-droplet-system\/","title":{"rendered":"AC\/DC-SDS \u2013 M470"},"content":{"rendered":"<h3>ac\/dc-SDS \u2013 M470 \u2013 Mesures de cellules \u00e0 gouttelettes par balayage pour le M470<\/h3>\n<h3>Effectuez des mesures de cellules \u00e0 gouttelettes scann\u00e9es sur le M470 modulaire de BioLogic avec l&#039;option SDS470.<\/h3>\n<p>Le syst\u00e8me de balayage de gouttelettes (SDS) r\u00e9alise des mesures par cellule \u00e0 gouttelettes balay\u00e9e (SDC). Lors de ces mesures, la sonde est une gouttelette qui se d\u00e9place \u00e0 la surface de l&#039;\u00e9chantillon selon les axes x et y. L&#039;\u00e9chantillon sert d&#039;\u00e9lectrode de travail, tandis que les \u00e9lectrodes de r\u00e9f\u00e9rence et auxiliaire sont int\u00e9gr\u00e9es \u00e0 la t\u00eate du SDC. La SDC effectue des mesures \u00e9lectrochimiques locales directes en limitant la cellule \u00e9lectrochimique \u00e0 la seule zone de contact avec la gouttelette. Sur le SDS470, la cellule \u00e0 gouttelettes est trait\u00e9e comme une cellule \u00e9lectrochimique classique, ce qui permet de r\u00e9aliser toute mesure \u00e9lectrochimique, y compris la spectroscopie d&#039;imp\u00e9dance \u00e9lectrochimique (EIS), au sein de cette cellule locale. De plus, le SDS470 permet de cartographier l&#039;activit\u00e9 \u00e9lectrochimique locale d&#039;un \u00e9chantillon.<\/p>\n<p>La cellule \u00e0 gouttelettes balay\u00e9e peut \u00eatre utilis\u00e9e pour tout \u00e9chantillon conducteur ou semi-conducteur. Bas\u00e9e sur une cellule \u00e9lectrochimique locale et confin\u00e9e, cette technique offre un potentiel d&#039;application consid\u00e9rable, des capteurs \u00e0 la catalyse. Elle est notamment employ\u00e9e dans la mesure des mat\u00e9riaux pour \u00e9tudier les propri\u00e9t\u00e9s \u00e9lectrochimiques d&#039;alliages de compositions vari\u00e9es. La cellule \u00e0 gouttelettes balay\u00e9e est \u00e9galement utilis\u00e9e en science de la corrosion. La possibilit\u00e9 de renouveler la gouttelette d&#039;\u00e9lectrolyte est particuli\u00e8rement int\u00e9ressante pour ces \u00e9tudes. En modifiant la vitesse de renouvellement, l&#039;influence du d\u00e9bit sur la corrosion a \u00e9t\u00e9 \u00e9tudi\u00e9e. Cette technique est aussi applicable \u00e0 la modification de surface, permettant une lithographie contr\u00f4l\u00e9e des \u00e9chantillons.<\/p>\n<h3>Aper\u00e7u : Mesures \u00e9lectrochimiques locales directes<\/h3>\n<ul>\n<li>Peut \u00eatre utilis\u00e9 avec toutes les exp\u00e9riences \u00e9lectrochimiques, de corrosion et d&#039;EIS.<\/li>\n<li>Effectue des mesures CC-SD et CA-SD de mani\u00e8re standard<\/li>\n<\/ul>\n<h3>Mesure d&#039;\u00e9chantillon sans exposition compl\u00e8te \u00e0 l&#039;\u00e9lectrolyte<\/h3>\n<p>Il n&#039;est pas toujours souhaitable d&#039;exposer un \u00e9chantillon actif \u00e0 un \u00e9lectrolyte pendant toute la dur\u00e9e d&#039;une exp\u00e9rience. Pour certains \u00e9chantillons, cela peut entra\u00eener, lors d&#039;exp\u00e9riences longues, des diff\u00e9rences importantes entre leur \u00e9tat initial et final. La SDC (spectroscopie de diffusion de la lumi\u00e8re) permet d&#039;effectuer des mesures locales sur un \u00e9chantillon et de r\u00e9aliser des cartographies d&#039;activit\u00e9 (x,y) sans exposition compl\u00e8te \u00e0 l&#039;\u00e9lectrolyte. Lors d&#039;une mesure SDC, seule la zone de l&#039;\u00e9chantillon situ\u00e9e sous la sonde \u00e0 gouttelette est expos\u00e9e \u00e0 l&#039;\u00e9lectrolyte. Les chercheurs ont ainsi la certitude que chaque point mesur\u00e9 de l&#039;\u00e9chantillon se trouve dans le m\u00eame \u00e9tat initial.<\/p>\n<h3><strong>Mesures CA standard<\/strong><\/h3>\n<p>La technique SDC en courant alternatif (AC-SDC) est exclusive au syst\u00e8me SDS470. Tous les syst\u00e8mes SDS470 permettent d&#039;effectuer des mesures SDC en courant continu (DC-SDC) et en courant alternatif (AC-SDC) en standard. \u00c0 l&#039;instar de la DC-SDC, en AC-SDC, la cellule \u00e9lectrochimique est confin\u00e9e \u00e0 la zone de contact avec la gouttelette. Lors d&#039;un balayage lin\u00e9aire ou surfacique en AC-SDC, un courant alternatif de fr\u00e9quence connue est appliqu\u00e9 \u00e0 l&#039;\u00e9chantillon pendant toute la dur\u00e9e de la mesure. Ceci permet d&#039;obtenir des mesures d&#039;imp\u00e9dance \u00e9lectrochimique v\u00e9ritablement locales, o\u00f9 l&#039;\u00e9chantillon est sond\u00e9 directement et localement. L&#039;AC-SDC permet d&#039;obtenir des images plus nettes que les autres m\u00e9thodes de mesure d&#039;imp\u00e9dance \u00e9lectrochimique locale, car seule la zone d&#039;int\u00e9r\u00eat est mesur\u00e9e \u00e0 chaque point.<\/p>\n<h3><strong>Gamme compl\u00e8te d&#039;exp\u00e9riences disponibles<\/strong><\/h3>\n<p>Le syst\u00e8me SDS470, \u00e9quip\u00e9 d&#039;un SDC, permet de r\u00e9aliser en standard une large gamme d&#039;exp\u00e9riences. Outre les exp\u00e9riences classiques de balayage de surface et de ligne effectu\u00e9es avec une polarisation continue ou alternative constante, il est \u00e9galement possible d&#039;utiliser l&#039;ensemble des mesures d&#039;\u00e9lectrochimie, de corrosion et d&#039;imp\u00e9dance \u00e9lectrochimique propos\u00e9es par le logiciel M470. Les chercheurs peuvent ainsi adapter la configuration exp\u00e9rimentale pour mesurer localement les informations qui les int\u00e9ressent.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>La cellule \u00e0 gouttelettes est trait\u00e9e exactement comme une cellule \u00e9lectrochimique classique.<\/p>","protected":false},"featured_media":488,"template":"","meta":[],"product_brand":[550],"product_cat":[84],"product_tag":[],"document":[],"class_list":{"0":"post-487","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-biologic","7":"product_cat-scanning-electrochemical-workstation","9":"first","10":"instock","11":"purchasable","12":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ac\/dc-SDS - M470 - SnowHouse<\/title>\n<meta name=\"description\" content=\"SDS470 is perfect for any conducting or semi-conducting sample.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/snowhouse.ca\/fr\/product\/material-characterization\/scanning-electrochemical-workstation\/ac-sds-sds470-alternative-current-scanning-droplet-system\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ac\/dc-SDS - 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