{"id":114780,"date":"2018-03-11T10:42:56","date_gmt":"2018-03-11T10:42:56","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/design-of-multifunctional-colloidal-particles-with-ion-selective-ligands-applications-in-ion-recovery-sensing-and-imaging\/"},"modified":"2018-03-11T10:42:56","modified_gmt":"2018-03-11T10:42:56","slug":"design-of-multifunctional-colloidal-particles-with-ion-selective-ligands-applications-in-ion-recovery-sensing-and-imaging","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/propiedades-de-materiales\/design-of-multifunctional-colloidal-particles-with-ion-selective-ligands-applications-in-ion-recovery-sensing-and-imaging\/","title":{"rendered":"Design of multifunctional colloidal particles with ion selective ligands: applications in ion recovery, sensing and imaging"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Dorleta Jimenez De Aberasturi Arranz <\/strong><\/h2>\n<p>La nanotecnolog\u00eda comprende el estudio, dise\u00f1o, manipulaci\u00f3n y aplicaci\u00f3n de materiales y sistemas funcionales as\u00ed como la explotaci\u00f3n de fen\u00f3menos y propiedades de la materia, a escala nanom\u00e9trica. La nanotecnolog\u00eda est\u00e1 considerada un \u00e1rea fundamental en la mayor\u00eda de campos de investigaci\u00f3n, que ha permitido obtener avances en \u00e1reas tan variadas como biomedicina, energ\u00eda, y medio ambiente, dando la posibilidad de dise\u00f1ar y construir nuevos materiales con propiedades avanzadaslos nanomateriales no s\u00f3lo presentan propiedades \u00fanicas, sino que pueden formar parte de materiales convencionales, de forma que a\u00f1aden nuevas propiedades y funcionalidades al material resultante. En esta tesis doctoral se presentan varios ligandos espec\u00edficos capaces de unirse a diferentes iones selectivamente y que al ser incluidos en otros sistemas dan lugar a nuevas funcionalidades y aplicaciones.Si estos ligandos se unen a nano o micropart\u00edculas magn\u00e9ticas permiten, adem\u00e1s de la recuperaci\u00f3n de los iones deseados gracias al ligando, la separaci\u00f3n de \u00e9stos mediante la aplicaci\u00f3n de un campo magn\u00e9tico externo.Los ligandos tambi\u00e9n pueden unirse a nanopart\u00edculas fluorescentes, dando lugar a la uni\u00f3n espec\u00edfica de ciertos iones cerca de la superficie de dichas nanopart\u00edculas. Mediante el estudio de cambios en la fluorescencia del sistema, es posible monitorizar in situ la uni\u00f3n i\u00f3n-ligando. Siguiendo este procedimiento se pueden construir sensores basados en fluorescencia con respuesta espec\u00edfica a diferentes iones.En el caso de ligandos que son capaces de complejar selectivamente iones que ofrecen contraste, se pueden construir sistemas de imagen mediante la uni\u00f3n de dichos ligandos a nanopart\u00edculas. Por ejemplo, los iones gd muestran contraste en resonancia magn\u00e9tica de imagen (rmi). Por lo tanto, las part\u00edculas con ligandos que complejen dichos iones sirven como agentes de contraste para mejorar las t\u00e9cnicas de esc\u00e1ner. Adem\u00e1s, los iones in muestran contraste en t\u00e9cnicas de imagen basadas en radioactividad. De esta forma, si los ligandos son selectivos a iones radioactivos y se unen a nanopart\u00edculas radioactivas, se pueden construir sistemas con dos marcadores.En resumen, en esta tesis doctoral se analizan mediante distintos ejemplos las nuevas propiedades que estos sistemas formados por la uni\u00f3n de part\u00edculas coloidales y ligandos selectivos poseen. A su vez, y como consecuencia de estas nuevas propiedades, se describe el amplio rango de aplicaciones reales que presentan estos sistemas.&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;Nanotechnology offers a vast repertoire of tools to address important questionsin different research fields. It allowed achieving breakthroughs in medicine,energy-related and environmental sciences. Nanoscience provides thepossibility to design and develop new materials with improved propertiescompared to the existing ones. Although nanomaterials possess intrinsicdistinctive properties, they can also introduce new properties and functionalitiesto existing materials. This work reports on properties of ligands that canspecifically bind ions of interest. If they are a part of an integrated system, newfunctionalities can be achieved.If the ligands are attached to the surface of magnetic nanoparticles, or presentinside magnetic microcapsules, ions bound to them can be extracted with anexternal magnetic field. Thus, magnetic separation becomes possible.If the ligands are bound to the surface of fluorescent nanoparticles, specificbinding of ions close to the nanoparticles surface can be achieved. This fact canbe recorded by following the fluorescence changes of the composite. In thismanner, specific fluorescence-based ion sensors can be constructed.If the ligands can interact with ions that provide contrast, their attachment tonanoparticles allows the system to be imaged. Gadolinium ions, for example,provide contrast for magnetic resonance imaging (mri) and radioactive indiumions (111in) provide contrast for radioactive imaging. Moreover, if ion selectiveligands, able to bind radionuclides, are bound to radioactive nanoparticles a bifunctionalsystem is obtained.In this dissertation, several examples are given to demonstrate how theattachment of different types of colloidal particles to one existing class ofmolecules, namely ion-selective ligands, can open new opportunities for theirapplication<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Design of multifunctional colloidal particles with ion selective ligands: applications in ion recovery, sensing and imaging<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Design of multifunctional colloidal particles with ion selective ligands: applications in ion recovery, sensing and imaging <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Dorleta Jimenez De Aberasturi Arranz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/10\/2013<\/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>Teofilo Rojo Aparicio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: teofilo Rojo aparicio <\/li>\n<li>victor Franco puntes (vocal)<\/li>\n<li>wolfgang Parak (vocal)<\/li>\n<li>Luis Manuel Liz marzan (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Dorleta Jimenez De Aberasturi Arranz La nanotecnolog\u00eda comprende el estudio, dise\u00f1o, manipulaci\u00f3n y aplicaci\u00f3n de materiales y [&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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