{"id":481,"date":"2025-07-23T01:38:46","date_gmt":"2025-07-23T01:38:46","guid":{"rendered":"https:\/\/snowhouse.ca\/produit\/svp470-scanning-vibrating-probe-system\/"},"modified":"2025-11-14T16:00:56","modified_gmt":"2025-11-14T16:00:56","slug":"svp470-scanning-vibrating-probe-system","status":"publish","type":"product","link":"http:\/\/snowhouse.ca\/fr\/produit\/material-characterization\/scanning-electrochemical-workstation\/svp470-scanning-vibrating-probe-system\/","title":{"rendered":"SVET \u2013 M470"},"content":{"rendered":"

Les mesures par technique d'\u00e9lectrode vibrante \u00e0 balayage sont effectu\u00e9es sur le M470 de BioLogic en utilisant l'option SVP470.<\/span><\/h3>\n

La technique d'\u00e9lectrode vibrante \u00e0 balayage (SVET), \u00e9galement connue sous le nom de sonde vibrante \u00e0 balayage (SVP) ou de sonde vibrante en biologie, est une technique d'\u00e9lectrochimie non intrusive. La SVET permet de mesurer le champ \u00e9lectrique local d'un \u00e9chantillon en solution, et ainsi de cartographier sa densit\u00e9 de courant. Gr\u00e2ce \u00e0 la vibration de la sonde perpendiculaire \u00e0 l'\u00e9chantillon, la SVET offre une sensibilit\u00e9 et une stabilit\u00e9 \u00e9lectriques \u00e9lev\u00e9es, notamment par rapport aux techniques pr\u00e9c\u00e9dentes. Ces caract\u00e9ristiques la rendent particuli\u00e8rement adapt\u00e9e \u00e0 la cartographie en temps r\u00e9el des ph\u00e9nom\u00e8nes \u00e9lectrochimiques.<\/p>\n

 <\/p>\n

La SVET permet de suivre en temps r\u00e9el les \u00e9v\u00e9nements se produisant dans des \u00e9chantillons dynamiques\u00a0: un atout majeur pour les chercheurs souhaitant observer les processus \u00e9lectrochimiques en direct. Cette caract\u00e9ristique explique l\u2019utilisation g\u00e9n\u00e9ralis\u00e9e de la SVET dans l\u2019\u00e9tude de la corrosion et des rev\u00eatements, notamment pour analyser la propagation de la corrosion, l\u2019efficacit\u00e9 des rev\u00eatements, les rev\u00eatements auto-r\u00e9parateurs, etc. En biologie, domaine pour lequel la SVET a \u00e9t\u00e9 initialement d\u00e9velopp\u00e9e, sa capacit\u00e9 \u00e0 mesurer de faibles courants extracellulaires a permis d\u2019\u00e9tudier des processus biologiques tels que la croissance et la cicatrisation. L\u2019int\u00e9r\u00eat pour l\u2019utilisation de la SVET dans l\u2019\u00e9tude des mat\u00e9riaux de batteries est croissant.<\/p>\n

 <\/p>\n

\"\"<\/p>\n

Mesure SVET de la soudure de l'acier mesur\u00e9e au potentiel en circuit ouvert (OCP) dans
\n5 mM NaCl avec suivi de la hauteur, en utilisant la topographie mesur\u00e9e par OSP470.<\/strong><\/p>\n

Aper\u00e7u : Mesurer la distribution locale du courant d'un \u00e9chantillon dans un \u00e9lectrolyte<\/h3>\n
    \n
  • \u00c9chantillons dynamiques d'\u00e9tude\u00a0in situ<\/em><\/li>\n
  • Visualiser les r\u00e9gions anodiques et cathodiques<\/li>\n
  • Convient aux \u00e9chantillons naturellement actifs et biais\u00e9s<\/li>\n<\/ul>\n

    Mesures en temps r\u00e9el d'\u00e9chantillons dynamiques<\/h3>\n

    Les exp\u00e9riences SVET b\u00e9n\u00e9ficient de la possibilit\u00e9 d'impl\u00e9menter un mode de balayage continu, ce qui signifie que la sonde n'a pas besoin de s'arr\u00eater \u00e0 chaque point de mesure. Les mises \u00e0 jour successives du module BioLogic SVP470 ont permis de garantir une excellente sensibilit\u00e9 \u00e9lectrique et une grande stabilit\u00e9 du syst\u00e8me, assurant ainsi des exp\u00e9riences rapides et fiables pour visualiser clairement les r\u00e9gions anodiques et cathodiques d'un \u00e9chantillon. Les mesures SVET avec le SVP470 offrent donc des avantages ind\u00e9niables pour la mesure en temps r\u00e9el d'\u00e9chantillons dynamiques, au fur et \u00e0 mesure que les processus \u00e9lectrochimiques se d\u00e9roulent.\u00a0in situ<\/em>\u00a0et\u00a0in vivo<\/em>Il est m\u00eame possible de s\u00e9quencer plusieurs analyses SVET pour suivre automatiquement ces processus \u00e0 mesure qu'ils se d\u00e9veloppent, gr\u00e2ce au logiciel propri\u00e9taire du M470.<\/p>\n

     <\/p>\n

    Cartographier localement la densit\u00e9 de courant des \u00e9chantillons\u00a0in situ<\/em><\/h3>\n

    SVET est bien adapt\u00e9 \u00e0\u00a0in situ<\/em>\u00a0Les \u00e9tudes reposent sur la mesure de l'\u00e9chantillon actif, ou polaris\u00e9, en solution. Ceci est essentiel pour l'exp\u00e9rience exploitant la chute de tension iR dans la solution au-dessus de l'\u00e9chantillon, permettant ainsi la mesure des potentiels micro-galvaniques. Bien que ces potentiels soient g\u00e9n\u00e9ralement repr\u00e9sent\u00e9s tels quels, ils peuvent \u00eatre facilement convertis en une carte de la densit\u00e9 de courant locale de l'\u00e9chantillon, gr\u00e2ce \u00e0 l'\u00e9talonnage de la sonde SVET.<\/p>\n

     <\/p>\n

    Fonction d'auto-r\u00e9glage pour une configuration exp\u00e9rimentale plus rapide<\/h3>\n

    La technique SVET repose sur la vibration de la sonde perpendiculaire \u00e0 l'\u00e9chantillon pour g\u00e9n\u00e9rer un signal de courant sinuso\u00efdal. Ce courant alternatif est converti en courant continu par l'application d'un signal de d\u00e9modulation \u00e0 l'aide de l'amplificateur de d\u00e9tection synchrone du M470. Le signal de d\u00e9modulation appliqu\u00e9 par l'amplificateur doit \u00eatre s\u00e9lectionn\u00e9 de mani\u00e8re \u00e0 maximiser la r\u00e9ponse en courant continu. Pour pallier les difficult\u00e9s parfois rencontr\u00e9es lors de la d\u00e9termination de la phase de r\u00e9f\u00e9rence optimale, il est possible d'utiliser la fonction d'auto-r\u00e9glage avec l'exp\u00e9rience SVP470. Outre l'obtention d'un signal continu maximal, l'utilisation de l'auto-r\u00e9glage permet \u00e9galement de r\u00e9duire le temps de pr\u00e9paration de l'exp\u00e9rience.<\/p>","protected":false},"excerpt":{"rendered":"

    Mesures par la technique de l'\u00e9lectrode vibrante \u00e0 balayage<\/p>","protected":false},"featured_media":482,"template":"","meta":[],"product_brand":[550],"product_cat":[84],"product_tag":[],"document":[],"class_list":{"0":"post-481","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":"\nSVET \u2013 M470 - SnowHouse<\/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:\/\/snowhouse.ca\/fr\/product\/material-characterization\/scanning-electrochemical-workstation\/svp470-scanning-vibrating-probe-system\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SVET \u2013 M470 - SnowHouse\" \/>\n<meta property=\"og:description\" content=\"Scanning Vibrating Electrode Technique measurements\" \/>\n<meta property=\"og:url\" content=\"https:\/\/snowhouse.ca\/fr\/product\/material-characterization\/scanning-electrochemical-workstation\/svp470-scanning-vibrating-probe-system\/\" \/>\n<meta property=\"og:site_name\" content=\"SnowHouse\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-14T16:00:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/snowhouse.ca\/wp-content\/uploads\/2025\/07\/46566.png\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"250\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/snowhouse.ca\/product\/material-characterization\/scanning-electrochemical-workstation\/svp470-scanning-vibrating-probe-system\/\",\"url\":\"https:\/\/snowhouse.ca\/product\/material-characterization\/scanning-electrochemical-workstation\/svp470-scanning-vibrating-probe-system\/\",\"name\":\"SVET \u2013 M470 - 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