SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.2: Poster
Montag, 27. März 2023, 18:00–20:00, P3
Liquid phase (S)TEM of DNA origami gold nanoparticle hybrids — •A. Ong1, D. Pohl1, T.K. Jeong2,3, A. Heerwig2,3, M. Mertig2,3, and B. Rellinghaus1 — 1Dresden Center for Nanoanalysis (DCN), cfaed, TU Dresden, Germany. — 2Physical Chemistry, TU Dresden, Germany — 3Kurt-Schwabe-Institut für Mess- und Sensortechnik Meinsberg e.V., Germany
DNA origami pads with site-specific patterns of ssDNA are flexible molecular templates for gold nanoparticles to self-assemble into functional supracolloidal structures [1]. The structure-property relation of supracolloidal structures play a significant role in constructing novel materials with desired properties for application in devices [2]. However, this relation has not been adequately understood. The study focuses on investigating the self-assembly and kinetic processes in supracolloidal structures using (scanning) transmission electron microscopy [(S)TEM] both in vacuum and in the liquid phase. Images of gold nanoparticles attached to DNA origami were acquired under vacuum and in-situ in the liquid phase, highlighting the possibility of real-time visualizations at the nanometer scale in different environments. The measured distances between gold nanoparticles in liquid confirm the intended templating mechanism. Financial support by DFG through RTG 2767 and by the EU Horizon 2020 Research & Innovation Programme grant agreement no. 964248 is gratefully acknowledged.
[1] J. Zessin et al. Nano Lett. (2017)17, 5163.
[2] T. Woehl, ACS Nano (2019) 13, 12272.