DNA origami directed 3D nanoparticle superlattice via electrostatic assembly

Sofia Julin, Antti Korpi, Nonappa, Boxuan Shen, Ville Liljeström, Olli Ikkala, Adrian Keller, Veikko Linko*, Mauri A. Kostiainen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
158 Downloads (Pure)

Abstract

The arrangements of metal nanoparticles into spatially ordered structures is still challenging, but DNA-based nanostructures have proven to be feasible building blocks in directing the higher-ordered arrangements of nanoparticles. However, an additional DNA functionalization of the particles is often required to link them to the DNA frames. Herein, we show that ordered 3D metal nanoparticle superlattices could be formed also by plainly employing electrostatic interactions between particles and DNA nanostructures. By utilizing the negatively charged DNA origami surface, we were able to assemble 6-helix bundle DNA origami and cationic gold nanoparticles (AuNPs) into well-ordered 3D tetragonal superlattices. Further, the results reveal that shape and charge complementarity between the building blocks are crucial parameters for lattice formation. Our method is not limited to only AuNPs and the origami shapes presented here, and could therefore be used in construction of a variety of functional materials.

Original languageEnglish
Pages (from-to)4546-4551
Number of pages6
JournalNanoscale
Volume11
Issue number10
DOIs
Publication statusPublished - 14 Mar 2019
MoE publication typeA1 Journal article-refereed

Fingerprint Dive into the research topics of 'DNA origami directed 3D nanoparticle superlattice via electrostatic assembly'. Together they form a unique fingerprint.

Cite this