{"id":282,"date":"2023-05-11T15:11:09","date_gmt":"2023-05-11T15:11:09","guid":{"rendered":"https:\/\/wpd.ugr.es\/~lipoplex\/?page_id=282"},"modified":"2023-05-11T15:17:22","modified_gmt":"2023-05-11T15:17:22","slug":"doble-capa-electrica-inversion-de-carga","status":"publish","type":"page","link":"https:\/\/wpd.ugr.es\/~lipoplex\/doble-capa-electrica-inversion-de-carga\/","title":{"rendered":"Doble Capa El\u00e9ctrica: Inversi\u00f3n de Carga"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"282\" class=\"elementor elementor-282\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-229bf36 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"229bf36\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1cc8290\" data-id=\"1cc8290\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bab4d30 elementor-widget elementor-widget-heading\" data-id=\"bab4d30\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.13.1 - 09-05-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Doble Capa El\u00e9ctrica: Inversi\u00f3n de Carga\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e4c2508 elementor-widget elementor-widget-text-editor\" data-id=\"e4c2508\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.13.1 - 09-05-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>La estructura de iones entorno a una superficie cargada en disoluci\u00f3n se denomina\u00a0<em>Doble Capa El\u00e9ctrica<\/em>\u00a0(DCE). Tradicionalmente, la DCE ha sido estudiada mediante modelos basados en la\u00a0<em>ecuaci\u00f3n de Poisson-Boltzmann<\/em>\u00a0(EPB) Sin embargo, este formalismo no es capaz de describir correctamente la DCE en presencia de iones multivalentes. Precisamente, en los \u00faltimos a\u00f1os, el estudio de coloides en presencia de electrolitos multivalentes ha suscitado un gran inter\u00e9s tanto a nivel cient\u00edfico, como industrial y tecnol\u00f3gico. En concreto, cabe destacar el\u00a0<em>fen\u00f3meno de sobrecarga\u00a0<\/em>(tambi\u00e9n conocido como\u00a0<em>inversi\u00f3n de carga<\/em>), que consiste en aquel proceso seg\u00fan el cual una part\u00edcula coloidal cargada puede llegar a comportarse, en presencia de electrolito, como si tuviera carga de signo contrario. Este efecto de inversion de carga se ve favorecido cuando el electrolito es de tipo asim\u00e9trico, siendo el contrai\u00f3n quien presenta una valencia mayor que la unidad. De acuerdo con esto, el fen\u00f3meno de sobrecarga ha tenido multiples aplicaciones entre las que cabe destacar aquellas destinadas a provocar la sobrecarga de mol\u00e9culas de ADN de ciertos virus para combatir infecciones. As\u00ed pues, el estudio de sobrecarga en part\u00edculas coloidales cargadas en presencia de electrolitos asim\u00e9tricos resulta de gran inter\u00e9s para poder entender el fundamento de este fen\u00f3meno.<\/p><p>Desde un punto de vista cl\u00e1sico, los modelos basados en la EPB consideran a los iones como cargas puntuales y por tanto no tiene en cuenta las correlaciones ionicas debidas a su tama\u00f1o. \u00c9ste es, en parte, el motivo por el cual los modelos basados en la EPB no son capaces de explicar el fen\u00f3meno de sobrecarga sin considerar hip\u00f3tesis adicionales como la\u00a0<em>adsorci\u00f3n espec\u00edfica\u00a0<\/em>(<a href=\"https:\/\/wpd.ugr.es\/~lipoplex\/efectos-hofmeister\/\">Efectos Hofmeister<\/a>)<em>\u00a0<\/em>de iones en la superficie coloidal. Por el contrario, el\u00a0<em>modelo primitivo<\/em>\u00a0de DCE s\u00ed que tiene en cuenta el tama\u00f1o i\u00f3nico, de manera que haciendo uso de este modelo ya sea mediante teor\u00edas mecanoestad\u00edsitcas como las ecuaciones integrales o mediante simulaciones Monte Carlo, podemos estudiar el efecto de las correlaciones de corto alcance debidas al volumen de exclusi\u00f3n de los iones.<\/p><p><strong>PUBLICACIONES<\/strong><\/p><p>[35] A Martin-Molina, L Lue, M Quesada-Perez, K Bohinc.\u00a0<a>Interaction between charged lipid vesicles and point-or rod-like trivalent ions.\u00a0<\/a>Colloids and Surfaces B: Biointerfaces 178 (2019) 525-529<\/p><p>[34] G. I. Guerrero-Garcia, E. Gonzalez-Tovar, M. Quesada-Perez, A. Martin-Molina, The non-dominance of counterions in charge-asymmetric electrolytes: non-monotonic precedence of the electrostatic screening and local inversion of the electric \ufb01eld by multivalent coions. Phys. Chem. Chem. Phys. 18 (2016) 21852-21864<\/p><p>[33] F. Vereda, A. Martin-Molina, R. Hidalgo-Alvarez, M. Quesada-Perez, Specific ion effects on the electrokinetic properties of iron oxide nanoparticles: experiments and simulations, Phys. Chem. Chem. Phys. 17 (2015) 17069\u201317078.<\/p><p>[32] G. Luque-Caballero, A. Mart\u00edn-Molina, M. Quesada-P\u00e9rez, Polyelectrolyte adsorption onto like-charged surfaces mediated by trivalent counterions: A Monte Carlo simulation study, J. Chem. Phys. 140 (2014) 174701.<\/p><p>[31] J. Faraudo, A. Martin-Molina, Competing forces in the interaction of polyelectrolytes with charged interfaces, Curr. Opin. Colloid Interface Sci. 18 (2013) 517\u2013523.<\/p><p>[30] A. Mart\u00edn-Molina, C. Rodr\u00edguez-Beas and\u00a0 J. Faraudo, Effect of calcium and magnesium on phosphatidylserine membranes: experiments and all-atomic simulations, Biophysical Journal, 102 (2012) 2095-2103.<\/p><p>[29] J.G. Ibarra-Armenta, A. Mart\u00edn-Molina, K. Bohinc and\u00a0 M. Quesada-P\u00e9rez, Effects of the internal structure of spheroidal divalent ions on the charge density profiles of the electric double layer, The Journal of chemical physics, 137 (2012) 224701.<\/p><p>[28] A. Mart\u00edn-Molina, J.G. Ibarra-Armenta, E. Gonz\u00e1lez-Tovar, R. Hidalgo-\u00c1lvarez and\u00a0 M. Quesada-P\u00e9rez, Monte Carlo simulations of the electrical double layer forces in the presence of divalent electrolyte solutions: effect of the ion size, Soft Matter, 7 (2011) 1441-1449.<\/p><p>[27] J.G. Ibarra-Armenta, A. Mart\u00edn-Molina and\u00a0 M. Quesada-P\u00e9rez, Influence of monovalent ion size on colloidal forces probed by Monte Carlo simulations, Physical Chemistry Chemical Physics, 13 (2011) 13349-13357.<\/p><p>[26] M. Quesada-P\u00e9rez, A. Mart\u00edn-Molina, J. Ibarra-Armenta and\u00a0 R. Hidalgo-\u00c1lvarez, 10 Ion Size Correlations in Electric Double Layers, Nanoscience: Colloidal and Interfacial Aspects, (2010) 249-268.<\/p><p>[25] A. Mart\u00edn-Molina, C. Rodr\u00edguez-Beas and\u00a0 J. Faraudo, Charge reversal in anionic liposomes: experimental demonstration and molecular origin, Physical review letters, 104 (2010) 168103.<\/p><p>[24] A. Mart\u00edn-Molina, M. Quesada-P\u00e9rez and\u00a0 R. Hidalgo-\u00c1lvarez, 3 Ionic Structures in Colloidal Electric Double Layers: Ion Size Correlations, Structure and functional properties of colloidal systems, 146 (2010) 63.<\/p><p>[23] M. Quesada-P\u00e9rez, R. Hidalgo-\u00c1lvarez, A. Mart\u00edn-Molina, Effect of ionic van der Waals forces on the diffuse potential of model colloids, Colloid Polym. Sci. 288 (2010) 151\u2013158<\/p><p>[22] A. Marti\u0301n-Molina, J.G. Ibarra-Armenta, M. Quesada-P\u00e9rez, Effect of ion dispersion forces on the electric double layer of colloids: a Monte Carlo simulation study, J. Phys. Chem. B. 113 (2009) 2414\u20132421<\/p><p>[21] A. Travesset, A. Martin-Molina, C. Calero, J. Faraudo, M. Quesada-Perez and\u00a0 R. Hidalgo-Alvarez, Charge inversion in monovalent ionic solutions, in:\u00a0 APS Meeting Abstracts, Vol 1, 2009, pp. 14008.<\/p><p>[20] A. Mart\u00edn-Molina, C. Rodr\u00edguez-Beas, R. Hidalgo-\u00c1lvarez and\u00a0 M. Quesada-P\u00e9rez, Effect of surface charge on colloidal charge reversal, The Journal of Physical Chemistry B, 113 (2009) 6834-6839.<\/p><p>[19] A. Mart\u00edn-Molina, R. Hidalgo-\u00c1lvarez and\u00a0 M. Quesada-P\u00e9rez, Additional considerations about the role of ion size in charge reversal, Journal of Physics: Condensed Matter, 21 (2009) 424105.<\/p><p>[18] A. Mart\u00edn-Molina, C. Calero, J. Faraudo, M. Quesada-P\u00e9rez, A. Travesset and\u00a0 R. Hidalgo-\u00c1lvarez, The hydrophobic effect as a driving force for charge inversion in colloids, Soft Matter, 5 (2009) 1350-1353.<\/p><p>[17] J.G. Ibarra-Armenta, A. Mart\u00edn-Molina and\u00a0 M. Quesada-P\u00e9rez, Testing a modified model of the Poisson\u2013Boltzmann theory that includes ion size effects through Monte Carlo simulations, Physical Chemistry Chemical Physics, 11 (2009) 309-316.<\/p><p>[16] A. Mart\u00edn-Molina, J.A. Maroto-Centeno, R. Hidalgo-Alvarez and\u00a0 M. Quesada-P\u00e9rez, Charge reversal in real colloids: Experiments, theory and simulations, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 319 (2008) 103-108.<\/p><p>[15] S. Madurga, A. Mart\u00edn-Molina, E. Vilaseca, F. Mas and\u00a0 M. Quesada-P\u00e9rez, Effect of the surface charge discretization on electric double layers: A Monte Carlo simulation study, The Journal of chemical physics, 126 (2007) 234703.<\/p><p>[14] A. Mart\u00edn-Molina, M. Quesada-P\u00e9rez and\u00a0 R. Hidalgo-\u00c1lvarez, Electric double layers with electrolyte mixtures: Integral equations theories and simulations, The Journal of Physical Chemistry B, 110 (2006) 1326-1331.<\/p><p>[13] A. Mart\u00edn-Molina, J.A. Maroto-Centeno, R. Hidalgo-\u00c1lvarez and\u00a0 M. Quesada-P\u00e9rez, Testing one component plasma models on colloidal overcharging phenomena, The Journal of chemical physics, 125 (2006) 144906.<\/p><p>[12] M. Quesada-P\u00e9rez, A. Mart\u00edn-Molina and\u00a0 R. Hidalgo-\u00c1lvarez, Simulation of electric double layers undergoing charge inversion: mixtures of mono-and multivalent ions, Langmuir, 21 (2005) 9231-9237.<\/p><p>[11] M. Quesada-P\u00e9rez, E. Gonz\u00e1lez-Tovar, A. Mart\u00edn-Molina, M. Lozada-Cassou and\u00a0 R. Hidalgo-\u00c1lvarez, Ion size correlations and charge reversal in real colloids, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 267 (2005) 24-30.<\/p><p>[10] M. Quesada-P\u00e9rez, A. Mart\u0131n-Molina and\u00a0 R. Hidalgo-\u00c1lvarez, Simulation of electric double layers with multivalent counterions: Ion size effect, The Journal of chemical physics, 121 (2004) 8618-8626.<\/p><p>[9] A. Martin-Molina, M. Quesada-Perez, F. Galisteo-Gonzalez and\u00a0 R. Hidalgo-Alvarez, Charge inversion of latex particles in the presence of electrolyte, in:\u00a0 Trends in Colloid and Interface Science XVI, Springer Berlin Heidelberg, 2004, pp. 114-118.<\/p><p>[8] M. Quesada-Perez, A. Martin-Molina, F. Galisteo-Gonzalez and\u00a0 R. Hidalgo-Alvarez, Erratum: Electrophoretic mobility of model colloids and overcharging: theory and experiment, MOLECULAR PHYSICS, 101 (2003) 1933-1934.<\/p><p>[7] M. Quesada\u2010P\u00e9rez, E. Gonz\u00e1lez\u2010Tovar, A. Mart\u00edn\u2010Molina, M. Lozada\u2010Cassou and\u00a0 R. Hidalgo\u2010\u00c1lvarez, Overcharging in colloids: beyond the Poisson\u2013Boltzmann approach, ChemPhysChem, 4 (2003) 234-248.<\/p><p>[6] A. Mart\u0131\u0301n-Molina, M. Quesada-P\u00e9rez, F. Galisteo-Gonz\u00e1lez and\u00a0 R. Hidalgo-Alvarez, Primitive models and electrophoresis: an experimental study, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 222 (2003) 155-164.<\/p><p>[5] A. Mart\u0131n-Molina, M. Quesada-P\u00e9rez, F. Galisteo-Gonz\u00e1lez and\u00a0 R. Hidalgo-\u00c1lvarez, Looking into overcharging in model colloids through electrophoresis: Asymmetric electrolytes, The Journal of chemical physics, 118 (2003) 4183-4189.<\/p><p>[4] A. Martin-Molina, M. Quesada-P\u00e9rez, F. Galisteo-Gonz\u00e1lez and\u00a0 R. Hidalgo-Alvarez, Probing charge inversion in model colloids: electrolyte mixtures of multi-and monovalent counterions, Journal of Physics: Condensed Matter, 15 (2003) S3475.<\/p><p>[3] A. Mart\u00edn-Molina, Propiedades electrocin\u00e9ticas de sistemas coloidales modelo: efecto del tama\u00f1o i\u00f3nico, in, University of Granada, 2003.<\/p><p>[2] M. Quesada-P\u00e9rez, A. Martin-Molina, F. Galisteo-Gonz\u00e1lez and\u00a0 R. Hidalgo-Alvarez, Electrophoretic mobility of model colloids and overcharging: theory and experiment, Molecular Physics, 100 (2002) 3029-3039.<\/p><p>[1] A. Martin-Molina, M. Quesada-Perez, F. Galisteo-Gonz\u00e1lez and\u00a0 R. Hidalgo-Alvarez, Electrophoretic mobility and primitive models: Surface charge density effect, The Journal of Physical Chemistry B, 106 (2002) 6881-6886.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Doble Capa El\u00e9ctrica: Inversi\u00f3n de Carga La estructura de iones entorno a una superficie cargada en disoluci\u00f3n se denomina\u00a0Doble Capa El\u00e9ctrica\u00a0(DCE). Tradicionalmente, la DCE ha&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/pages\/282"}],"collection":[{"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/comments?post=282"}],"version-history":[{"count":13,"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/pages\/282\/revisions"}],"predecessor-version":[{"id":300,"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/pages\/282\/revisions\/300"}],"wp:attachment":[{"href":"https:\/\/wpd.ugr.es\/~lipoplex\/wp-json\/wp\/v2\/media?parent=282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}