DNA-Based Self-Sorting of Nanoparticles on Gold Surfaces

Site‐selective deposition of nanoparticles onto surfaces is desirable for the fabrication of nanoscale devices. For nanoparticles with vastly different numbers of DNA chains on their surfaces, multivalent binding of short‐sequence motifs and nonspecific adsorption complicate sequence‐specific immobi...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2007-08, Vol.19 (15), p.1951-1956
Main Authors: Plutowski, U., Jester, S. S., Lenhert, S., Kappes, M. M., Richert, C.
Format: Article
Language:English
Subjects:
Assembly
DNA
Gold
Monolayers
Nanostructures
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Summary:Site‐selective deposition of nanoparticles onto surfaces is desirable for the fabrication of nanoscale devices. For nanoparticles with vastly different numbers of DNA chains on their surfaces, multivalent binding of short‐sequence motifs and nonspecific adsorption complicate sequence‐specific immobilization from mixtures. A new nanoparticle coating method that suppresses salt‐induced aggregation and undesirable binding events is reported. Size‐selective sorting of gold nanoparticles up to 60 nm diameter onto nanopatterned surfaces is shown (see figure).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200602169