Dresden 2017 – wissenschaftliches Programm
CPP 4.4: Vortrag
Montag, 20. März 2017, 11:15–11:30, ZEU 114
DNA based assembly of plasmonic nanoantennas — •Mathias Lakatos1, Hanna Brunner1, Darius Pohl2, Andreas Heerwig1, Bernd Rellinghaus2 und Michael Mertig1 — 1TU Dresden, Physikalische Chemie, Mess- und Sensortechnik, 01062, Dresden — 2IFW, Institut für Metallische Materialien, 01171 Dresden
Based on the ability of DNA to self-assemble into complex 2D and 3D structures with defined dimensions and structure specification at the nanometer scale, optical active nanostructures were synthesized and characterized. The preparation of the DNA template structures was done according to the so-called DNA origami method, where a long single-stranded DNA, the scaffold strand, is folded into a previously designed form by short single-stranded oligonucleotides. The incorporation of specific binding sites enables the local positioning of functional elements. For the construction of plasmonic active nanoantennas, complementary functionalized AuNR were used. Depending on the DNA template structures and the gold nanoparticles, nanoantennas of about 100 nm up to 300 nm size have been realized. Low-loss electron energy loss spectroscopy measurements were carried out using monochromated scanning transmission electron microscopy (STEM) on individual structural elements to gain insight into the localization of different plasmonic modes.