{"id":1448,"date":"2023-05-11T10:30:36","date_gmt":"2023-05-11T14:30:36","guid":{"rendered":"https:\/\/microscopiaumss.com\/?page_id=1448"},"modified":"2023-10-19T14:32:07","modified_gmt":"2023-10-19T14:32:07","slug":"muestra-solida-no-conductora","status":"publish","type":"page","link":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/muestra-solida-no-conductora\/","title":{"rendered":"Muestra no Conductora"},"content":{"rendered":"\n<p class=\"has-text-align-center has-ast-global-color-5-color has-text-color has-background has-medium-font-size\" style=\"background-color:#1e6d7e;text-transform:uppercase\"><strong>Muestra no conductora<\/strong><\/p>\n\n\n\n<p>Las muestras destinadas al SEM deben cumplir dos condiciones: deben estar <strong>secas<\/strong> y ser <strong>conductoras<\/strong>. Una muestra no conductora necesita recubrirse con un material que la haga conductora para inhibir los riesgos de carga y da\u00f1os t\u00e9rmicos en la muestra. En algunos casos, el recubrimiento met\u00e1lico delgado tambi\u00e9n ayuda a mejorar la se\u00f1al de emisi\u00f3n de electrones secundarios para el examen topogr\u00e1fico en el SEM.<\/p>\n\n\n\n<p class=\"has-text-align-center has-ast-global-color-4-background-color has-background\">La t\u00e9cnica de recubrimiento m\u00e1s adecuada a utilizar depender\u00e1 de las propiedades de la muestra, el tama\u00f1o de las estructuras que desea analizar y los m\u00e9todos necesarios para prepararla para la obtenci\u00f3n de im\u00e1genes en el microscopio.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-content-timeline uagb-timeline__outer-wrap uagb-block-d06efe1d-dbe5-4624-9e67-292a9dadc0c8 uagb-timeline__content-wrap uagb-timeline__center-block  uagb-timeline__arrow-center uagb-timeline\">\n<article class=\"wp-block-uagb-content-timeline-child uagb-timeline__field uagb-timeline-child-d6b5841f-82df-4aec-bd2b-d6ac231d4f8e uagb-timeline__right\"><div class=\"uagb-timeline__marker out-view-uagb-timeline__icon\"><svg xmlns=\"\" viewBox=\"0 0 256 512\"><\/svg><\/div><div class=\"uagb-timeline__day-new uagb-timeline__day-right uagb-timeline__events-inner-new\"><div class=\"uagb-timeline__events-inner--content\"><div class=\"uagb-timeline__date-hide uagb-timeline__inner-date-new\">Opci\u00f3n 1<\/div><h4 class=\"uagb-timeline__heading\">Recubrimiento de muestras en bajo vac\u00edo<\/h4><p class=\"uagb-timeline-desc-content\">Si una muestra no tiene una conductividad lo suficientemente alta, se puede cubrir r\u00e1pidamente con una capa conductora de oro u otros materiales adecuados; como platino (Pt) y oro\/paladio (Au\/Pd), utilizando el m\u00e9todo de recubrimiento de pulverizaci\u00f3n cat\u00f3dica o sputtering\u00a0(proceso f\u00edsico en el que se produce la vaporizaci\u00f3n de los \u00e1tomos de un material s\u00f3lido denominado &#8220;blanco&#8221; mediante el bombardeo de este por iones energ\u00e9ticos), para obtener las mejores condiciones de imagen. <br><br>   Si se requiere microan\u00e1lisis por rayos X, se puede utilizar un recubrimiento de evaporador de carbono o de haz de electrones e-beam. Estos recubrimientos protegen la muestra, permiten mejorar el contraste de la imagen.<\/p><div class=\"uagb-timeline__arrow\"><\/div><\/div><\/div><div class=\"uagb-timeline__date-new\">Opci\u00f3n 1<\/div><\/article>\n\n\n\n<article class=\"wp-block-uagb-content-timeline-child uagb-timeline__field uagb-timeline-child-8c54dd26-52c2-43a6-b5fa-07e3e8c8c945 uagb-timeline__left\"><div class=\"uagb-timeline__marker out-view-uagb-timeline__icon\"><svg xmlns=\"\" viewBox=\"0 0 256 512\"><\/svg><\/div><div class=\"uagb-timeline__day-new uagb-timeline__day-left uagb-timeline__events-inner-new\"><div class=\"uagb-timeline__events-inner--content\"><div class=\"uagb-timeline__date-hide uagb-timeline__inner-date-new\">Opci\u00f3n 2<\/div><h4 class=\"uagb-timeline__heading\">Recubrimiento de muestras en alto vac\u00edo<\/h4><p class=\"uagb-timeline-desc-content\">Sus aplicaciones van m\u00e1s all\u00e1 de la necesidad de obtener una muestra conductora para el SEM. Consigue recubrimientos de grano mucho m\u00e1s fino y est\u00e1 preparado para realizar \u201cspputtering\u201d con distintos metales. Tambi\u00e9n trabaja por el m\u00e9todo de evaporaci\u00f3n, con lo que aumenta el rango de posibles elementos de recubrimiento. <br><br> Los recubridores de pulverizaci\u00f3n\u00a0cat\u00f3dica de alto vac\u00edo\u00a0depositan pel\u00edculas delgadas con una estructura de grano mucho m\u00e1s fina, lo que permite un an\u00e1lisis SEM de alta resoluci\u00f3n. Adem\u00e1s, se puede pulverizar una gama m\u00e1s amplia de materiales, incluidos metales oxidables. Algunos ejemplos son el iridio (Ir), el tungsteno (W) o el titanio (Ti). En ocasiones, el cromo (Cr) se pulveriza para formar una capa amortiguadora. Adem\u00e1s, las recubridoras de alto vac\u00edo se pueden configurar para aplicaciones m\u00e1s avanzadas y una deposici\u00f3n multicapa.<\/p><div class=\"uagb-timeline__arrow\"><\/div><\/div><\/div><div class=\"uagb-timeline__date-new\">Opci\u00f3n 2<\/div><\/article>\n<div class=\"uagb-timeline__line\"><div class=\"uagb-timeline__line__inner\"><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Muestra no conductora Las muestras destinadas al SEM deben cumplir dos condiciones: deben estar secas y ser conductoras. Una muestra no conductora necesita recubrirse con un material que la haga conductora para inhibir los riesgos de carga y da\u00f1os t\u00e9rmicos en la muestra. En algunos casos, el recubrimiento met\u00e1lico delgado tambi\u00e9n ayuda a mejorar la [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_eb_attr":"","_uag_custom_page_level_css":"","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":"disabled","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1448","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"microumss","author_link":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/author\/microumss\/"},"uagb_comment_info":0,"uagb_excerpt":"Muestra no conductora Las muestras destinadas al SEM deben cumplir dos condiciones: deben estar secas y ser conductoras. Una muestra no conductora necesita recubrirse con un material que la haga conductora para inhibir los riesgos de carga y da\u00f1os t\u00e9rmicos en la muestra. En algunos casos, el recubrimiento met\u00e1lico delgado tambi\u00e9n ayuda a mejorar la&hellip;","_links":{"self":[{"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/pages\/1448"}],"collection":[{"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/comments?post=1448"}],"version-history":[{"count":1,"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/pages\/1448\/revisions"}],"predecessor-version":[{"id":1753,"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/pages\/1448\/revisions\/1753"}],"wp:attachment":[{"href":"http:\/\/microscopia.fcyt.umss.edu.bo\/index.php\/wp-json\/wp\/v2\/media?parent=1448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}