{"id":12164,"date":"2026-11-04T17:35:56","date_gmt":"2026-11-04T08:35:56","guid":{"rendered":"https:\/\/www.first.iir.isct.ac.jp\/?p=12164"},"modified":"2026-11-04T17:37:20","modified_gmt":"2026-11-04T08:37:20","slug":"detail_2156","status":"publish","type":"post","link":"https:\/\/www.first.iir.isct.ac.jp\/en\/detail_2156\/","title":{"rendered":"The 44rd International Biomedical Engineering Seminar\uff08November 10, 2026\uff09"},"content":{"rendered":"\n\n\n\n\n\n\n
Date<\/strong><\/span><\/td>\nNovember 10, 2026\u300014:00-15:30<\/span><\/td>\n<\/tr>\n
Venue<\/strong><\/span><\/td>\nMeeting Room 1, 2nd Floor, University Hall, Yokohama Campus, Institute of Science Tokyo<\/a><\/span><\/td>\n<\/tr>\n
Guest Speaker<\/strong><\/span><\/td>\nDr. Deepak Venkateshvaran\uff08Cavendish Laboratory, University of Cambridge, U.K.\uff09<\/a><\/span><\/td>\n<\/tr>\n
Title<\/strong><\/span><\/td>\nUnravelling the link between molecular mechanics and charge transport in organic semiconductors<\/span><\/td>\n<\/tr>\n
Abstract<\/strong><\/span><\/td>\n\u3000For decades, organic semiconductors have been prized for their mechanical flexibility. This raises a basic question: does softness limit how well they transport charge? My talk treats mechanics not as a property separate from transport but as inseparable from it. Afterall, macroscopic stiffness is the long-wavelength, zero-frequency limit of the acoustic phonon response, and the low-energy phonons it reflects are precisely those implicated in charge transport. To probe the link, I will show how atomic force microscopy serves as a real-space probe of molecular order and nanomechanics, complementing the reciprocal-space view from X-ray scattering. Higher-eigenmode imaging resolves polymer packing below one nanometre under ambient conditions, while force\u2013distance spectroscopy maps local stiffness across the same surfaces [1]. In semicrystalline polymers, nanoscale stiffness tracks structural order [2], but more tellingly, the interconnectedness of stiff domains along the charge-transport direction is what tracks carrier mobility. In the molecular semiconductor series based on alkylated DNTT, side chains expand the unit cell to soften the crystal out-of-plane, yet stiffen it in-plane, in step with mobility [3]. Taken together, these results point to a common structural origin for mechanics and charge transport in molecular materials. They establish nanomechanical measurement as a tactile complement to scattering \u2013 reading structure in real space, where it matters most for transport \u2013 and provide new design guidelines for next generation molecular semiconductors with even higher mobilities than those today.
\n<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

For inquiries, please contact<\/span><\/h2>\n

Assoc. Prof. Hiroaki Iino\uff08Sensing and Processing Research Core\uff09
\n\"https:\/\/www.first.iir.isct.ac.jp\/Contact_en.jpg\"<\/a><\/span><\/span>
\n20261110<\/a><\/p>\n

Related Site<\/strong><\/span>
\n\u25b6Institute of Integrated Research\uff08IIR\uff09<\/span><\/div>\n","protected":false},"excerpt":{"rendered":"

Date November 10, 2026\u300014:00-15:30 Venue Meeting Room 1, 2nd Floor, University Hall, Yokohama Campus, Institute of Science Tokyo Guest Speaker Dr. Deepak Venkateshvaran\uff08Cavendish Laboratory, University of Cambridge, U.K.\uff09 Title Unravelling the link between molecular mechanics and charge transport in organic semiconductors Abstract \u3000For decades, organic semiconductors have been prized for their mechanical flexibility. This raises […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"https:\/\/www.first.iir.isct.ac.jp\/?p=12154","footnotes":"","_links_to":"","_links_to_target":""},"categories":[18],"tags":[],"class_list":["post-12164","post","type-post","status-publish","format-standard","hentry","category-biomedical","en-US"],"_links":{"self":[{"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/posts\/12164","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/comments?post=12164"}],"version-history":[{"count":1,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/posts\/12164\/revisions"}],"predecessor-version":[{"id":12165,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/posts\/12164\/revisions\/12165"}],"wp:attachment":[{"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/media?parent=12164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/categories?post=12164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.first.iir.isct.ac.jp\/wp-json\/wp\/v2\/tags?post=12164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}