{"id":42,"date":"2017-01-30T19:54:37","date_gmt":"2017-01-30T18:54:37","guid":{"rendered":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/?page_id=42"},"modified":"2019-07-10T09:59:21","modified_gmt":"2019-07-10T07:59:21","slug":"block-copolymer-lithography","status":"publish","type":"page","link":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/block-copolymer-lithography\/","title":{"rendered":"Basics on block copolymer (BCP) lithography"},"content":{"rendered":"<div class=\"twoclick_social_bookmarks_post_42 social_share_privacy clearfix 1.6.4 locale-de_DE sprite-de_DE\"><\/div><div class=\"twoclick-js\"><script type=\"text\/javascript\">\/* <![CDATA[ *\/\njQuery(document).ready(function($){if($('.twoclick_social_bookmarks_post_42')){$('.twoclick_social_bookmarks_post_42').socialSharePrivacy({\"txt_help\":\"Wenn Sie diese Felder durch einen Klick aktivieren, werden Informationen an Facebook, Twitter, Flattr, Xing, t3n, LinkedIn, Pinterest oder Google eventuell ins Ausland \\u00fcbertragen und unter Umst\\u00e4nden auch dort gespeichert. N\\u00e4heres erfahren Sie durch einen Klick auf das <em>i<\\\/em>.\",\"settings_perma\":\"Dauerhaft aktivieren und Daten\\u00fcber-tragung zustimmen:\",\"info_link\":\"http:\\\/\\\/www.heise.de\\\/ct\\\/artikel\\\/2-Klicks-fuer-mehr-Datenschutz-1333879.html\",\"uri\":\"https:\\\/\\\/blogs.uni-paderborn.de\\\/kbrassat\\\/block-copolymer-lithography\\\/\",\"post_id\":42,\"post_title_referrer_track\":\"Basics+on+block+copolymer+%28BCP%29+lithography\",\"display_infobox\":\"on\"});}});\n\/* ]]> *\/<\/script><\/div><p>Block copolymer lithography is an emerging self-assembly technique for the large-area patterning of surfaces with regular nanosized features.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-66\" src=\"https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/01\/Bildschirmfoto-2017-01-30-um-19.58.54-300x155.png\" alt=\"BCP litho\" width=\"528\" height=\"273\" srcset=\"https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/01\/Bildschirmfoto-2017-01-30-um-19.58.54-300x155.png 300w, https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/01\/Bildschirmfoto-2017-01-30-um-19.58.54-768x396.png 768w, https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/01\/Bildschirmfoto-2017-01-30-um-19.58.54-1024x528.png 1024w, https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/01\/Bildschirmfoto-2017-01-30-um-19.58.54.png 1566w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/>We investigate the microphase separation behavior of Poly(styrene-b-methylmethacrylate) (PS-b-PMMA) block copolymers to create nanopores in a PS matrix in thin films. During the annealing of PS-b-PMMA thin films on solid surfaces polymers form ordered homopolmyer domains, i. e. nanoscopic PS- and PMMA-rich areas. Patterns like stripes, cylinders-in-matrix or spheres-in-matrix with feature sizes of few nm can be produced by choosing appropriate polymer block-length ratios and molecular weights. Adjusting annealing temperatures and times as well as polymer film thicknesses, the pattern homogeneity can be optimized.<\/p>\n<p>We create nanopores with diameters of 17 nm in PS thin films on several materials surfaces at pore densities of up to 9.4 x 10<sup>10<\/sup> cm<sup>-2<\/sup>, as shown in the SEM image.<\/p>\n<p>We investigate the influence of the surface free energy between substrate surface and the block copolymers on the phase separation behavior into ordered patterns as well as the polymers behavior on prepatterned surfaces.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Block copolymer lithography is an emerging self-assembly technique for the large-area patterning of surfaces with regular nanosized features. We investigate the microphase separation behavior of Poly(styrene-b-methylmethacrylate) (PS-b-PMMA) block copolymers to create nanopores in a PS matrix in thin films. During the annealing of PS-b-PMMA thin films on solid surfaces polymers form ordered homopolmyer domains, i. [&hellip;]<\/p>\n","protected":false},"author":7828,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-42","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/42","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/users\/7828"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/comments?post=42"}],"version-history":[{"count":14,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/42\/revisions"}],"predecessor-version":[{"id":766,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/42\/revisions\/766"}],"wp:attachment":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/media?parent=42"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}