{"90361":{"#nid":"90361","#data":{"type":"event","title":"(10-0831) Prof. Stephan Link, Rice University","body":[{"value":"\u003Cp\u003EProf. Stephan Link, Rice University\n\u003C\/p\u003E\n\u003Cp\u003ECollective plasmon modes in nanoparticle assemblies\n\u003C\/p\u003E\n\u003Cp\u003EPhysical Chemistry Seminar Series\n\u003C\/p\u003E\n\u003Cp\u003EIn order to incorporate plasmonic nanoparticles into functional devices it is necessary to understand how surface plasmons couple as particles are arranged into ordered structures.  Bottom-up assembly of chemically prepared nanoparticles facilities strong plasmon coupling due to short interparticle distances, but also gives to rise to defects in particle size, shape, and ordering.  Single particle spectroscopy of plasmonic nanoparticle assemblies, especially when correlated with structural characterization using scanning electron microscopy, allows one to gain a detailed understanding about collective plasmon modes.  We have used polarization sensitive dark-field scattering spectroscopy covering a broad spectral range from the visible up to 2000 nm and polarization dependent photothermal imaging to separately investigate radiative and nonradiative coupling in one-dimensional assemblies of plasmonic nanoparticles.  For both scattering and absorption, we observed collective plasmon modes that are highly polarized along the main axis of the one-dimensional nanoparticle chain and red-shifted from the plasmon resonance of the individual constituents.  These collective plasmon modes are compared to plasmon antenna modes of continuous nanorods with varying length and width.  Furthermore, we have developed a fluorescence based method to visualize plasmon propagation in one-dimensional nanostructures.\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:christine.payne@chemistry.gatech.edu\u0022\u003EProf. Christine Payne\u003C\/a\u003E (404-385-3125) or \u003Ca href=\u0022mailto:melsayed@gatech.edu\u0022\u003EProf. Mostafa El-Sayed\u003C\/a\u003E (404-894-0292).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Stephan Link, Rice University\n\nCollective plasmon modes in nanoparticle assemblies\n\nPhysical Chemistry Seminar Series","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Stephan Link, Rice University"}],"uid":"27275","created_gmt":"2010-06-17 00:00:00","changed_gmt":"2016-10-08 01:47:13","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2010-08-31T17:00:00-04:00","event_time_end":"2010-08-31T18:00:00-04:00","event_time_end_last":"2010-08-31T18:00:00-04:00","gmt_time_start":"2010-08-31 21:00:00","gmt_time_end":"2010-08-31 22:00:00","gmt_time_end_last":"2010-08-31 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.owlnet.rice.edu\/~slink\/","title":"Prof. Stephan Link, Rice University"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"919","name":"Biochemistry"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}