Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Advances in DNA nanotechnology allow the design and fabrication of highly complex DNA structures, uisng specific programmable interactions between smaller nucleic acid building blocks. To convey this concept to the fabrication of metallic nanoparticles, an assembly platform is developed based on a f...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2021-07, Vol.33 (29), p.e2100381-n/a
Main Authors: Ye, Jingjing, Aftenieva, Olha, Bayrak, Türkan, Jain, Archa, König, Tobias A. F., Erbe, Artur, Seidel, Ralf
Format: Article
Language:English
Subjects:
Assembly
Coordination compounds
DNA - chemistry
DNA origami
DNA templating
Gold - chemistry
gold nanoparticles
Materials science
Metal Nanoparticles - chemistry
Molds
Nanoparticles
Nanotechnology
Nanotechnology - methods
Nucleic Acid Conformation
Nucleic acids
seeded growth
shape programming
Superstructures
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Summary:Advances in DNA nanotechnology allow the design and fabrication of highly complex DNA structures, uisng specific programmable interactions between smaller nucleic acid building blocks. To convey this concept to the fabrication of metallic nanoparticles, an assembly platform is developed based on a few basic DNA structures that can serve as molds. Programming specific interactions between these elements allows the assembly of mold superstructures with a range of different geometries. Subsequent seeded growth of gold within the mold cavities enables the synthesis of complex metal structures including tightly DNA‐caged particles, rolling‐pin‐ and dumbbell‐shaped particles, as well as T‐shaped and loop particles with high continuity. The method further supports the formation of higher‐order assemblies of the obtained metal geometries. Based on electrical and optical characterizations, it is expected that the developed platform is a valuable tool for a self‐assembly‐based fabrication of nanoelectronic and nanooptic devices. A versatile construction kit for the bottom‐up synthesis of complex metal nanostructures with programmable shapes is presented. It uses different DNA elements that can be docked together to produce hollow mold superstructures for metal filling. Electrical and optical characterizations of the obtained metallic nanostructures explore their potential for the self‐assembly of nanoelectronic and nanooptic devices.
ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.202100381