Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: Nanoparticles and Composite Materials
CPP 8.30: Poster
Montag, 26. März 2012, 17:30–20:00, Poster A
Preparation and Controlled Organization of Cubic-Shaped Gold Nanoparticles for the Generation of High-Harmonics — •Valerie Mondes1, Sarah Metzke1, Matthias Buchholz1, Matthias Kling2, Jürgen Plenge1, Eckart Rühl1, and Christina Graf1 — 1Freie Universität Berlin, Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Takustr. 3, 14195 Berlin — 2Max-Planck Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching
Strong plasmonic enhancement effects are expected from ordered patterns of anisotropic noble metal nanoparticles. Instead of using lithographically fabricated nanostructures, we prepare gold nanoparticles by methods of colloidal chemistry. For the preparation of cubically shaped gold nanoparticles we improved known literature procedures [1]. The conditions during the formation of the nanoparticles have been systematically varied in order to receive monodisperse gold nanocubes. It turned out that the exact composition of the shape-controlling surfactant cetyltrimethylammonium bromide (CTAB) plays a crucial role for the growth of the nanoparticles. Therefore, CTAB samples were purchased from different manufactures and their composition was analyzed regarding the presence of other halides, which are supposed to influence the particle growth. In addition, the influence of the temperature has been investigated. A self-organization method at liquid-liquid interfaces has been used to receive such ordered particle assemblies [2]. [1] P.N.Sisco, C.J.Murphy, J.Phys.Chem. A, 113, 3973 ( 2009). [2] Li, Huang, and Sun Angew. Chem. Int. Ed., 45, 2537 (2006).