TY - CONF A1 - Heck, Christian A1 - Bald, Ilko A1 - Prinz, J. A1 - Merk, V. A1 - Kneipp, Janina T1 - Gold nanolenses on DNA origami substrates for surface-enhanced Raman scattering N2 - Surface-enhanced Raman scattering (SERS) exploits the enhancement of electromagnetic fields in close vicinity of plasmonic nanostructures, enabling characterization of analytes at the single-molecule level. The nanometer-scale spatial arrangement of plasmonic metal nanoparticles and analyte molecules has a significant effect on the observed signal enhancements and represents a great challenge in this technique. In our work, DNA origami is used as platform for precise positioning of gold nanoparticles (AuNPs). Especially high sensitivities are expected for gold nanolenses (AuNLs), consisting of rows of three or more differently-sized AuNPs. We assembled different AuNL designs and determined respective SERS enhancement factors by collecting Raman spectra from single AuNLs. Finite difference time domain calculations estimate attainable electromagnetic field enhancements. Ultimately, we aim to develop a versatile platform for various SERS applications. T2 - DNA meets Plasmonics Konferenz CY - Bad Honnef, Germany DA - 07.12.2015 KW - DNA origami KW - SERS KW - Plasmonics PY - 2015 AN - OPUS4-35906 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -