{"id":53225,"date":"2018-03-09T22:40:53","date_gmt":"2018-03-09T22:40:53","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-electroqua%c2%admico-y-nanoscopico-de-depositos-de-melanina-en-sustratos-solidos-y-formacion\/"},"modified":"2018-03-09T22:40:53","modified_gmt":"2018-03-09T22:40:53","slug":"estudio-electroqua%c2%admico-y-nanoscopico-de-depositos-de-melanina-en-sustratos-solidos-y-formacion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/tecnologia-industrial\/estudio-electroqua%c2%admico-y-nanoscopico-de-depositos-de-melanina-en-sustratos-solidos-y-formacion\/","title":{"rendered":"Estudio electroqu\u00edmico y nanoscopico de depositos de melanina en sustratos solidos y formaci\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Del Pilar D\u00edaz Ruiz <\/strong><\/h2>\n<p>En esta tesis se ha realizado un estudio sistem\u00e1tico de la eumelanina sint\u00e9tica en el que se han caracterizado aspectos sobre composici\u00f3n, estructura polim\u00e9rica y formaci\u00f3n de pel\u00edculas de este pol\u00edmero. la caracterizaci\u00f3n de la estructura polim\u00e9rica se ha realizado mediante simulaci\u00f3n computacional, microscop\u00edas de barrido de sonda (afm y stm) as\u00ed como absorci\u00f3n uv-vis. En este estudio se optimiz\u00f3 la geometr\u00eda de los posibles olig\u00f3meros que componen el pol\u00edmero de eumelanina mediante dft y se obtuvieron los espectros de absorci\u00f3n uv-vis simulados para dichas especies mediante zindo. Los olig\u00f3meros que concuerdan en tama\u00f1o con los datos experimentales obtenidos por stm se componen de cinco mon\u00f3meros de dhi (dihidroxiindol) y sus espectros de absorci\u00f3n uv-vis resultan como bandas de absorci\u00f3n solapadas que ofrecen un continuo de absorci\u00f3n en toda esta zona del espectro, tal y como muestra el espectro uv-vis experimental. La melanina sint\u00e9tica contiene hierro en su composici\u00f3n al igual que otros tipos de melanina naturales, estos se ha podido comprobar mediante aes y espectroscopia de absorci\u00f3n at\u00f3mica. en segundo lugar se ha abordado la formaci\u00f3n de pel\u00edculas de melanina mediante evaporaci\u00f3n y electroadsorci\u00f3n: la evaporaci\u00f3n en distintos disolventes sobre diferentes sustratos muestra que no se consiguen formar pel\u00edculas homog\u00e9neas por este m\u00e9todo, sin embargo, se consigue una distribuci\u00f3n homog\u00e9nea del material sobre mica en disolventes poco polares como el n-hexano y tolueno. La melanina evaporada sobre el sustrato se comporta como un aislante el\u00e9ctrico. la electroadsorci\u00f3n demelanina sobre au (111) en condiciones potenciost\u00e1ticas ha mostrado ser un m\u00e9todo eficaz para formar pel\u00edculas homog\u00e9neas, cuya topograf\u00eda est\u00e1 inducida por el sustrato y cuyo grosor puede ser controlado por la concentraci\u00f3n del a disoluci\u00f3n de melanina y el tiempo de adsorci\u00f3n. Al aumentar el espesor de la pel\u00edcula disminuye su capacidad d<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio electroqu\u00edmico y nanoscopico de depositos de melanina en sustratos solidos y formaci\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio electroqu\u00edmico y nanoscopico de depositos de melanina en sustratos solidos y formaci\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Del Pilar D\u00edaz Ruiz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 La laguna<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/06\/2006<\/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>Alberto Hern\u00e1ndez Creus<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: sergio Gonz\u00e1lez gonz\u00e1lez <\/li>\n<li>Luis Vazquez burgos (vocal)<\/li>\n<li>oscar Manuel Gonz\u00e1lez d\u00edaz (vocal)<\/li>\n<li> Cea mingueza Mar\u00eda  del pilar (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Del Pilar D\u00edaz Ruiz En esta tesis se ha realizado un estudio sistem\u00e1tico de la eumelanina [&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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