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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 57: Thin Films, Nanostructures and Nanoparticles I

CPP 57.7: Vortrag

Donnerstag, 23. März 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 Fery^2,3, 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.