{"id":83855,"date":"2018-03-10T00:08:03","date_gmt":"2018-03-10T00:08:03","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/electrodeposicio-en-capa-prima-aspectes-experimentals-i-teorics-de-la-morfologa%c2%ada-de-digitacio\/"},"modified":"2018-03-10T00:08:03","modified_gmt":"2018-03-10T00:08:03","slug":"electrodeposicio-en-capa-prima-aspectes-experimentals-i-teorics-de-la-morfologa%c2%ada-de-digitacio","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/electrodeposicio-en-capa-prima-aspectes-experimentals-i-teorics-de-la-morfologa%c2%ada-de-digitacio\/","title":{"rendered":"Electrodeposici\u00f3 en capa prima: aspectes experimentals i te\u00f3rics de la morfolog\u00eda de digitaci\u00f3"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marta Queralt L\u00f3pez Salvans <\/strong><\/h2>\n<p>La electr\u00f3lisis de una fina capa de disoluci\u00f3n de sulfato de cobre con peque\u00f1as cantidades de sales alcalinas genera estructuras columnares, sim\u00e9tricas, y densamente organizadas, pareceidas a las observadas en fen\u00f3menos de desplazamiento de fluidos (digitaciones viscosas) y no observadas previamente en el contexto de la electrodeposici\u00f3n en capa fina. Su din\u00e1mica de crecimiento se inicia con la inestabilizaci\u00f3n del frente plano, que conduce a la supervivencia de un cierto n\u00famero de digitaciones despu\u00e9s de un proceso de competici\u00f3n. finalmente, \u00e9stas experimentan un cambio morfol\u00f3gico a estructuras ramificadas tipo fractal.  la composici\u00f3n de estos dep\u00f3sitos se analiza por difracci\u00f3n de rayos x para muestras en polvo, comprobando que el contenido en \u00f3xido cuproso es mayor que en el cobre, al contrario del resto de morofolog\u00edas. Esto se debe a la reducci\u00f3n del hidrogel de la capa envolvente del dep\u00f3sito, compuesta por complejos hidroxilados de cobre formados gracias al aumento de ph asociado a la reacci\u00f3n de reducci\u00f3n del disolvente, potenciada por el aumento de concentraci\u00f3n de sales alcalinas. Este hidrogel confiere una tensi\u00f3n superficial efectiva a la capa de concentraci\u00f3n entre la disoluci\u00f3n inicial y la de composici\u00f3n nula de iones cobre que rodea el dep\u00f3sito, exaltando su car\u00e1cter interfacial.  la din\u00e1mica de crecimiento se centra entres etapas. La inestabilizaci\u00f3ni nicial de la interfase se interpreta en base a la analog\u00eda con el fen\u00f3meno de las digitaciones viscosas, identificando un efecto restaurador asignable a la tensi\u00f3n superficial de la interfase\/capa de mezcla, y un mecanismo inestabilizador asociado a la fuerza impulsora. La transici\u00f3n entre reg\u00edmenes competitivos, i.E., Entre un r\u00e9gimen de competici\u00f3n fuerte donde gran parte de las digitaciones incipientes son eliminadas, y uno de competici\u00f3n residual, donde un n\u00famero de digitaciones sobreviven, se refleja mediante un modelo fenomen<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Electrodeposici\u00f3 en capa prima: aspectes experimentals i te\u00f3rics de la morfolog\u00eda de digitaci\u00f3<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Electrodeposici\u00f3 en capa prima: aspectes experimentals i te\u00f3rics de la morfolog\u00eda de digitaci\u00f3 <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marta Queralt L\u00f3pez Salvans <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/03\/2000<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Josep Claret Bonet<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: claudio Gutierrez de la fe <\/li>\n<li>jaume Casademunt viader (vocal)<\/li>\n<li>Juan Elezgaray lizarribar (vocal)<\/li>\n<li>Miguel \u00e1ngel Rubio \u00e1lvarez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marta Queralt L\u00f3pez Salvans La electr\u00f3lisis de una fina capa de disoluci\u00f3n de sulfato de cobre con [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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