Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 85: Thin Films, Nanostructures and Nanoparticles I
O 85.7: Talk
Thursday, March 23, 2017, 12:00–12:15, ZEU 114
vinyl-terminated Au nanotriangles as platform for the fabrication of hybrid Au@pNIPAM particles for improved SERS responses. — Miguel Casado-Rodriguez1, Christian Kuttner2, Manuel Lopez-Romero1, Andreas Fery2,3, and •Rafael Contreras-Caceres2 — 1Universidad de Malaga, Departamento de. Quimica Organica. Facutlad de Ciencias. Universidad de Malaga 29071. Malaga. Spain — 2Leibniz-Institut fu*r Polymerforschung, Dresden e.V. Hohe Strasse 6, 01069 Dresden, Germany — 3Physical Chemistry of Polymeric Materials, Technische Universita*t Dresden, 01069 Dresden, Germany
We present a new approach for a water-based seedless synthesis of vinyl-terminated triangular Au nanotriangles. This method enables temperature controllable Au size by using 3-butenoic acid as reducing agent. We initially analyze the influence of the temperature on the particle size. Interestingly, the presence of terminal double bonds on the Au nanotriangle surface (coming from 3BA) is exploited for the fabrication of core@shell hybrid systems by free radical polymerization of N-isopropylacrylamide (AuNT@pNIPAM). Additionally, Au overgrowth using AuNTs@pNIPAM as seeds permits the fabrication of Austars@pNIPAM particles. The SERS enhancement capabilities of these two core*shell hybrids demonstrate that Au cores with tips and high curvature sites produced the highest plasmonic responses.