Plasmonic nanorods and nanoparticle-assemblies [Elektronische Ressource] : synthesis, characterization, and usage as sensors / Inga Zins

Inga ZinsMainz, 2011Dissertationzur Erlangung des Grades“Doktor der Naturwissenschaften”im Promotionsfach Chemieam Fachbereich Chemie, Pharmazie und Geowissenschaftender Johannes Gutenberg-Universität MainzNanoChaNanopaSensodsrsPlasmonicracterization,roandandUsagerticle-AssembliesasSynthesis,Die vorliegende Arbeit wurde im Zeitraum von September 2007 bis Februar 2011 am Institut fürPhysikalische Chemie der Johannes Gutenberg-Universität Mainz angefertigt.Dekan:Erster Gutachter:ZweiterTag der mündlichen Prüfung: 16.03.2011IIIPlasmonic nanoparticles are subject to this study. They have the property that their interactionwith light results in a plasma-oscillation, visible in bright colors of the nanoparticle suspensions.The color of the particles depends on intrinstic (material, size, shape), as well as on externalfeatures (refractive index of the surrounding , distance of neighbouring nanoparticles). They aretherefore used as plasmonic sensors, reporting on changes in their environment. The demandfor sensing applications is not only a good sensitivity. The ability to reproducibly synthesizeplasmonic nanoparticles with designed features is important as well. Here, the growth of goldand silver-coated nanorods is studied, and the use of nanoparticles as orientation, refractive index,and distance sensor is explored.A model for the growth of gold nanords is developed.