Dresden 2020 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 59: Complex Fluids and Colloids, Micelles and Vesicles (joint session CPP/DY)

CPP 59.3: Vortrag

Mittwoch, 18. März 2020, 10:00–10:15, ZEU 114

Construction of 1D hollow cube chains as a platform for synthesis of nanoscopic magnetic filaments. — •Deniz Mostarac1, Yan Xiong3, Pedro A. Sanchez2, Oleg Gang3,4, and Sofia Kantorovich1,21University of Vienna, Vienna, Austria — 2Ural Federal University, Ekaterinburg, Russia — 3Columbia University, New York, USA — 4Brookhaven National Laboratories, New York, USA

Construction of smart materials with sophisticated magnetic response by incorporating magnetic nanoparticles (MNPs) within permanently cross-linked structures, opens up the possibility for synthesis of complex, highly magneto-responsive systems. Assembly using DNA origami frames where the structure building instructions are encoded via DNA sequencing, provides a new perspective on construction of filaments with MNPs. Using programable DNA origami assembly, one can create scaffolds that serve as a blueprints for chain-like conformations of MNPs. Challenge is to produce a DNA based backbone that can be populated with MNPs, which when not subjected to an external magnetic field would in its polymeric properties resemble a real polymer. We present synthesis approach and results of 1D hollow cube chain scaffolds, together with preliminary results of AFM, TEM and SAXS measurements. We present computational models with both explicit and implicit DNA linker modeling, demonstrating the utility of such systems and exploring the influence of the number of DNA linkers between the hollow cubes, and their length, on the polymeric properties of the chained assemblies.

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