{"115781":{"#nid":"115781","#data":{"type":"event","title":"Prof. Luis Liz-Marzan, Universidade de Vigo","body":[{"value":"\u003Cp\u003EProf. Luis Liz-Marzan, Universidade de Vigo\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EDirecting the Growth and Structure of Metal Nanocrystals\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003EPhysical Chemistry Seminar Series\u003C\/p\u003E\u003Cp\u003EThe assembly of nanoparticle building blocks is a pre-requisite for the amplification of the properties of the components and\/or the generation of new features unique to the ensemble. Usually, nanoparticles employed for these assemblies are spherical and lack a geometrical preference toward directional self-assembly, thus limiting their potential applications. In contrast, controlled self-assembly of non-spherical nanoparticles, such as gold nanorods, enables these arrays to form defined 1D, 2D or 3D structures with a vectorial dependence of the desired properties.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;I shall mainly focus in this presentation on the growth and shape transformation of gold nanorods, in the presence of different types of surfactants and polymers, with discussion of the effects of surface energy and crystallographic structure.\u003Csup\u003E1-3\u003C\/sup\u003E Additionally, it will be shown how, by playing around with surface properties, directional assembly of the same nanoparticles can be successfully achieved.\u003C\/p\u003E\u003Cp\u003EFormation of standing 2D and 3D superlattices made of gold nanorods will be demonstrated, either when gemini surfactants are used as capping agents in aqueous solution\u003Csup\u003E4\u003C\/sup\u003E or when mixed with gold nanowires.\u003Csup\u003E5\u003C\/sup\u003E The extreme directionality of these assemblies is reflected in the anisotropic optical properties of the crystalline superlattices and allows the design of interesting applications, for example in ultrasensitive detection.\u003Csup\u003E6\u003C\/sup\u003E\u003C\/p\u003E\u003Cp\u003EReferences:\u003C\/p\u003E\u003Cp\u003E1. J. P\u00e9rez-Juste et al., \u003Cem\u003ECoord. \u003C\/em\u003E\u003Cem\u003EChem. Rev.\u003C\/em\u003E \u003Cstrong\u003E2005\u003C\/strong\u003E, \u003Cem\u003E249\u003C\/em\u003E, 1870-1901.\u003Cbr \/\u003E2. E. Carb\u00f3-Argibay et al., \u003Cem\u003EAngew. Chem. Int. Ed. \u003Cstrong\u003E2007\u003C\/strong\u003E, 49\u003C\/em\u003E, 8983-8987.\u003Cbr \/\u003E3. E. Carb\u00f3-Argibay et al., \u003Cem\u003EAngew. Chem. Int. Ed. \u003C\/em\u003E\u003Cstrong\u003E2010\u003C\/strong\u003E,\u003Cem\u003E 49\u003C\/em\u003E, 9397-9340.\u003Cbr \/\u003E4. A. Guerrero-Mart\u00ednez et al., \u003Cem\u003EAngew. \u003C\/em\u003E\u003Cem\u003EChem. Int. Ed.\u003C\/em\u003E \u003Cstrong\u003E2009\u003C\/strong\u003E, \u003Cem\u003E48\u003C\/em\u003E, 9484-9488.\u003Cbr \/\u003E5. A. S\u00e1nchez-Iglesias et al., \u003Cem\u003EAngew. Chem. Int. Ed.\u003C\/em\u003E \u003Cstrong\u003E2010\u003C\/strong\u003E,\u003Cem\u003E 49\u003C\/em\u003E, 9985-9989.\u003Cbr \/\u003E6. R.A. Alvarez-Puebla et al., \u003Cem\u003EPNAS\u003C\/em\u003E \u003Cstrong\u003E2011\u003C\/strong\u003E,\u003Cem\u003E108\u003C\/em\u003E, 8157-8161.\u003C\/p\u003E\u003Cp\u003EFor more information contact \u003Ca href=\u0022http:\/\/mailto: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":"\u003Cp\u003EProf. Luis Liz-Marzan, Universidade de Vigo\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EDirecting the Growth and Structure of Metal Nanocrystals\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003EPhysical Chemistry Seminar Series\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":"","uid":"27275","created_gmt":"2012-03-09 13:15:39","changed_gmt":"2016-10-08 01:58:20","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2012-03-30T21:00:00-04:00","event_time_end":"2012-03-30T22:00:00-04:00","event_time_end_last":"2012-03-30T22:00:00-04:00","gmt_time_start":"2012-03-31 01:00:00","gmt_time_end":"2012-03-31 02:00:00","gmt_time_end_last":"2012-03-31 02:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EShirley Tomes (404-894-0591) \u003Ca href=\u0022mailto:shirley.tomes@chemistry.gatech.edu\u0022\u003Eshirley.tomes@chemistry.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}