{"id":303,"date":"2021-09-21T14:59:07","date_gmt":"2021-09-21T13:59:07","guid":{"rendered":"https:\/\/iop.fnwi.uva.nl\/scm\/wordpress_test\/?page_id=303"},"modified":"2022-09-16T08:23:48","modified_gmt":"2022-09-16T07:23:48","slug":"friction","status":"publish","type":"page","link":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/friction\/","title":{"rendered":"Friction and Interfaces"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"303\" class=\"elementor elementor-303\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9fa50ed elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"9fa50ed\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container 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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\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<\/div>\n\t\t\t\t<\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c7c752f elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"c7c752f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\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-50 elementor-top-column elementor-element elementor-element-6be0133\" data-id=\"6be0133\" 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-251b597 elementor-widget elementor-widget-image\" data-id=\"251b597\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img src=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2021\/09\/davinci.jpeg\" title=\"davinci\" alt=\"davinci\" \/>\t\t\t\t\t\t\t\t\t\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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b4e5ff4\" data-id=\"b4e5ff4\" 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-d3d457a elementor-widget elementor-widget-text-editor\" data-id=\"d3d457a\" 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 - v3.5.5 - 03-02-2022 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;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\tWe are all familiar with friction, as it allows us to walk, brake or hold on object without letting it slip. Often we want to have low friction, for example in verhicles to reduce energy consumption or in our joints to reduce wear of our body.\n\nHowever, it is very hard to predict friction as the origins are complex. Friction arises at small scales at the interface between two materials, which makes it hard to image. This lack of understanding has hampered the development of low or high friction materials from first principles, leaving it a matter of trial and error as it has been for ages.\n\nOne of the first scientists to study friction was Leonardo da Vinci. He made beautiful drawings of his friction experiments as you can see on the left. He found out that friction does not depend on the macroscopic area of contact, but only on the weight applied (consider the bottom picture, the same object slid on different sides leads to the same friction force).\n\nIn the Soft Matter group, we use a recently developed fluorescent molecules to image the\u00a0<em>contact area<\/em>\u00a0between solids with high resolution (<a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1002\/ange.201410240\">Suhina\u00a0<em>et al.<\/em>, 2015<\/a>). Click on the images below to learn more about our current research on friction.\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9d42797 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"9d42797\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\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-b16051a\" data-id=\"b16051a\" 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-0b51eb8 elementor-posts--align-center elementor-grid-4 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-posts--thumbnail-top elementor-card-shadow-yes elementor-posts__hover-gradient elementor-widget elementor-widget-posts\" data-id=\"0b51eb8\" data-element_type=\"widget\" data-settings=\"{&quot;cards_columns&quot;:&quot;4&quot;,&quot;cards_columns_tablet&quot;:&quot;2&quot;,&quot;cards_columns_mobile&quot;:&quot;1&quot;,&quot;cards_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:35,&quot;sizes&quot;:[]},&quot;cards_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;cards_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.cards\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<link rel=\"stylesheet\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/plugins\/elementor-pro\/assets\/css\/widget-posts.min.css\">\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-cards elementor-grid\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-1542 post type-post status-publish format-standard has-post-thumbnail hentry category-research-friction\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/why-can-we-skate-on-ice\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"1669\" height=\"938\" src=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1.png\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1.png 1669w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1-300x169.png 300w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1-1024x576.png 1024w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1-768x432.png 768w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/ice_friction-1-1536x863.png 1536w\" sizes=\"(max-width: 1669px) 100vw, 1669px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/why-can-we-skate-on-ice\/\" >\n\t\t\t\tWhy can we skate on ice?\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>As most people have experienced \u2013 either by accident or when wearing ice skates \u2013 ice is exceptionally slippery. The question why<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/why-can-we-skate-on-ice\/\" >\n\t\t\t\tRead More\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-1540 post type-post status-publish format-standard has-post-thumbnail hentry category-research-friction\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/capillary-friction\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"328\" height=\"329\" src=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/capill.png\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/capill.png 328w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/capill-300x300.png 300w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/01\/capill-150x150.png 150w\" sizes=\"(max-width: 328px) 100vw, 328px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/capillary-friction\/\" >\n\t\t\t\tCapillary friction\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Capillary adhesion can indirectly contribute to friction, especially at smooth interfaces in humid environments. Few experiments have addressed the mechanisms underlying the<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/capillary-friction\/\" >\n\t\t\t\tRead More\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-1535 post type-post status-publish format-standard has-post-thumbnail hentry category-research-friction\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/static-friction\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"540\" height=\"540\" src=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/02\/staticfriction.jpg\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/02\/staticfriction.jpg 540w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/02\/staticfriction-300x300.jpg 300w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2022\/02\/staticfriction-150x150.jpg 150w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/static-friction\/\" >\n\t\t\t\tStatic friction\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>The way in which an object starts to slip under an applied shear force, the transition from static to dynamic friction, is<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/static-friction\/\" >\n\t\t\t\tRead More\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-1527 post type-post status-publish format-standard has-post-thumbnail hentry category-research-friction\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/adhesion\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"930\" height=\"475\" src=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2021\/08\/gekko_en_tape.png\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2021\/08\/gekko_en_tape.png 930w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2021\/08\/gekko_en_tape-300x153.png 300w, https:\/\/iop.fnwi.uva.nl\/scm\/wp-content\/uploads\/2021\/08\/gekko_en_tape-768x392.png 768w\" sizes=\"(max-width: 930px) 100vw, 930px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/adhesion\/\" >\n\t\t\t\tAdhesion\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Adhesion is the science of stickiness. Everyday life examples where adhesion is important are tape, glue and velcro, a more exotic example<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2022\/01\/22\/adhesion\/\" >\n\t\t\t\tRead More\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\n\n\t\t\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a863e50 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"a863e50\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\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-a38bdf7\" data-id=\"a38bdf7\" 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-fd54edd elementor-widget elementor-widget-template\" data-id=\"fd54edd\" data-element_type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"footer\" data-elementor-id=\"272\" class=\"elementor elementor-272\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-20c1f73c elementor-section-content-top elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"20c1f73c\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-41028f5b\" data-id=\"41028f5b\" 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-476c6186 elementor-widget elementor-widget-spacer\" data-id=\"476c6186\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38a8063f elementor-widget elementor-widget-heading\" data-id=\"38a8063f\" 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 - v3.5.5 - 03-02-2022 *\/\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\">Postal Adress<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-221eab6 elementor-widget elementor-widget-text-editor\" data-id=\"221eab6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h6>Van der Waals-Zeeman Instituut<\/h6><h6><span style=\"word-spacing: 0.1em;\">University of Amsterdam<\/span><\/h6><h6><span style=\"word-spacing: 0.1em;\">P.O. Box 94485<\/span><\/h6><h6>1090 GL Amsterdam<\/h6>\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<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-7a9b780e\" data-id=\"7a9b780e\" 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-3c56fc0d elementor-widget elementor-widget-spacer\" data-id=\"3c56fc0d\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19672145 elementor-widget elementor-widget-heading\" data-id=\"19672145\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Visit us<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-554c85f elementor-widget elementor-widget-text-editor\" data-id=\"554c85f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h6>Science Park 904<\/h6><h6>C4.238 (4th floor)<\/h6><h6>1098 XH Amsterdam<\/h6><h6>The Netherlands<\/h6>\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<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-5c2718fb\" data-id=\"5c2718fb\" 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-3320cf1b elementor-widget elementor-widget-spacer\" data-id=\"3320cf1b\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7e8cb063 elementor-widget elementor-widget-heading\" data-id=\"7e8cb063\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Contact us<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ee31b5 elementor-widget elementor-widget-text-editor\" data-id=\"5ee31b5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h6>Phone: +31 (0)20 525 6311<\/h6><h6>Fax: \u00a0 \u00a0 \u00a0+31 (0)20 525 5102<\/h6><h6>Email: \u00a0 secr-iop-science(at)uva.nl<\/h6>\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<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-170ecb70\" data-id=\"170ecb70\" 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-1686aabf elementor-widget elementor-widget-spacer\" data-id=\"1686aabf\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e6d5dc7 elementor-widget elementor-widget-google_maps\" data-id=\"6e6d5dc7\" data-element_type=\"widget\" data-widget_type=\"google_maps.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.5 - 03-02-2022 *\/\n.elementor-widget-google_maps .elementor-widget-container{overflow:hidden}.elementor-widget-google_maps iframe{height:300px}<\/style>\t\t<div class=\"elementor-custom-embed\">\n\t\t\t<iframe frameborder=\"0\" scrolling=\"no\" marginheight=\"0\" marginwidth=\"0\"\n\t\t\t\t\tsrc=\"https:\/\/maps.google.com\/maps?q=Science%20Park%20904&#038;t=m&#038;z=12&#038;output=embed&#038;iwloc=near\"\n\t\t\t\t\ttitle=\"Science Park 904\"\n\t\t\t\t\taria-label=\"Science Park 904\"\n\t\t\t><\/iframe>\n\t\t<\/div>\n\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<\/div>\n\t\t\t\t<\/div>\n\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>We are all familiar with friction, as it allows us to walk, brake or hold on object without letting it slip. Often we want to have low friction, for example in verhicles to reduce energy consumption or in our joints to reduce wear of our body. However, it is very hard to predict friction as [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1524,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":[],"_links":{"self":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/pages\/303"}],"collection":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/comments?post=303"}],"version-history":[{"count":76,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/pages\/303\/revisions"}],"predecessor-version":[{"id":2331,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/pages\/303\/revisions\/2331"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media\/1524"}],"wp:attachment":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media?parent=303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}