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Casting of Gold Nanoparticles with High Aspect Ratios inside DNA Molds
Author(s) -
Ye Jingjing,
Weichelt Richard,
Kemper Ulrich,
Gupta Vaibhav,
König Tobias A. F.,
Eychmüller Alexander,
Seidel Ralf
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202003662
Subject(s) - colloidal gold , nanostructure , nanotechnology , materials science , nanomaterials , nanoparticle , dna , casting , chemistry , metallurgy , biochemistry
DNA nanostructures provide a powerful platform for the programmable assembly of nanomaterials. Here this approach is extended to synthesize rod‐like gold nanoparticles in a full DNA controlled manner. The approach is based on DNA molds containing elongated cavities. Gold is deposited inside the molds using a seeded‐growth procedure. By carefully exploring the growth parameters it is shown that gold nanostructures with aspect ratios of up to 7 can be grown from single seeds. The highly anisotropic growth is in this case controlled only by the rather soft and porous DNA walls. The optimized seeded growth procedure provides a robust and simple routine to achieve continuous gold nanostructures using DNA templating.