{"id":131,"date":"2021-09-11T11:12:40","date_gmt":"2021-09-11T11:12:40","guid":{"rendered":"http:\/\/nurit.local\/?page_id=131"},"modified":"2021-09-11T11:15:00","modified_gmt":"2021-09-11T11:15:00","slug":"nanotubes","status":"publish","type":"page","link":"http:\/\/nurit.local\/nanotubes\/","title":{"rendered":"Nanotubes"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"131\" class=\"elementor elementor-131\" 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-35f33103 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"35f33103\" 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-33 elementor-top-column elementor-element elementor-element-1e02612d\" data-id=\"1e02612d\" 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-6d5cd3ff elementor-widget elementor-widget-image\" data-id=\"6d5cd3ff\" 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 width=\"150\" height=\"150\" src=\"http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/BGU-LOGO-ROUND-White-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" loading=\"lazy\" srcset=\"http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/BGU-LOGO-ROUND-White-150x150.png 150w, http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/BGU-LOGO-ROUND-White-300x300.png 300w, http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/BGU-LOGO-ROUND-White.png 450w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/>\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-66 elementor-top-column elementor-element elementor-element-28ade627\" data-id=\"28ade627\" 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-7d0c0a8f elementor-widget elementor-widget-heading\" data-id=\"7d0c0a8f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Prof. Nurit Ashkenasy - Research Group<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ef1ac06 elementor-widget elementor-widget-heading\" data-id=\"4ef1ac06\" 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\">Bio-Electronics and Bio-Sensors<\/h2>\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-5fc81a2a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5fc81a2a\" 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-723be741\" data-id=\"723be741\" 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-676987f4 elementor-widget elementor-widget-image\" data-id=\"676987f4\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div 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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\">Nanotubes<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7fae2d18 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"7fae2d18\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\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-17b0e65 elementor-widget elementor-widget-text-editor\" data-id=\"17b0e65\" 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<p>The self-assembly propensity of peptides has been extensively utilized in recent years for the formation of supramolecular nanostructures. In particular, the self-assembly of peptide into fibrils and nanotubes makes them promising building blocks for electronic and electro-optic applications. However, the mechanisms of charge transfer in these wire like structures, especially in ambient conditions, are not yet fully understood. By combining principles of layer-by-layer deposition with the propensity of d,l <i>a<\/i>-cyclic peptides to self-assemble into nanotubes, based on \u03b2-sheet like interactions, we have developed a novel approach for assembling peptide nanotubes vertically oriented on gold surfaces. Using this novel fabrication methodology, we have fabricated molecular junctions, with conductive atomic force microscopy tip as a second electrode. Studies of the junctions\u2019 current-voltage characteristics as function of the nanotube length revealed an efficient charge transfer in these supramolecular structures with a low current attenuation constant of 0.1 \u00c5<sup>-1<\/sup>, which indicate that electron transfer is dominated by hopping. Moreover, the threshold voltage to field-emission dominated transport was found to increase with peptide length in a manner that depends on the nature of the contact with the electrodes. For more information refer to our publication in <a href=\"http:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2012\/nr\/c1nr11068c\"><i>Nanoscale<\/i><\/a><i>.<\/i><\/p>\n<p>\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a3e307b elementor-widget elementor-widget-image\" data-id=\"a3e307b\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img width=\"686\" height=\"319\" src=\"http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/2.png\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/2.png 686w, http:\/\/nurit.local\/wp-content\/uploads\/2021\/09\/2-300x140.png 300w\" sizes=\"(max-width: 686px) 100vw, 686px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">The thickness of peptide nanotubes layer as function of number of LbL deposition cycles is shown on the left (measured by ellipsometry). The resulting I-V curves for the first (blue), second (red), and third layers (green) are shown on the right (measured by CP-AFM).<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d48fc01 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"d48fc01\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"http:\/\/nurit.local\/research\/\" class=\"elementor-button-link elementor-button elementor-size-xl\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Back to previous page<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\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\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Prof. Nurit Ashkenasy &#8211; Research Group Bio-Electronics and Bio-Sensors Home Research Publications Group Positions News Links Nanotubes The self-assembly propensity of peptides has been extensively utilized in recent years for the formation of supramolecular nanostructures. In particular, the self-assembly of peptide into fibrils and nanotubes makes them promising building blocks for electronic and electro-optic applications. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":[],"_links":{"self":[{"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/pages\/131"}],"collection":[{"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/comments?post=131"}],"version-history":[{"count":4,"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/pages\/131\/revisions"}],"predecessor-version":[{"id":136,"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/pages\/131\/revisions\/136"}],"wp:attachment":[{"href":"http:\/\/nurit.local\/wp-json\/wp\/v2\/media?parent=131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}