Solidifying framework nucleic acids with silica.
Journal
Nature protocols
ISSN: 1750-2799
Titre abrégé: Nat Protoc
Pays: England
ID NLM: 101284307
Informations de publication
Date de publication:
08 2019
08 2019
Historique:
received:
09
11
2018
accepted:
18
04
2019
pubmed:
5
7
2019
medline:
27
11
2019
entrez:
5
7
2019
Statut:
ppublish
Résumé
Soft matter can serve as a template to guide the growth of inorganic components with well-controlled structural features. However, the limited design space of conventional organic and biomolecular templates restricts the complexity and accuracy of templated growth. In past decades, the blossoming of structural DNA nanotechnology has provided us with a large reservoir of delicate-framework nucleic acids with design precision down to a single base. Here, we describe a DNA origami silicification (DOS) approach for generating complex silica composite nanomaterials. By utilizing modified silica sol-gel chemistry, pre-hydrolyzed silica precursor clusters can be uniformly coated onto the surface of DNA frameworks; thus, user-defined DNA-silica hybrid materials with ~3-nm precision can be achieved. More importantly, this method is applicable to various 1D, 2D and 3D DNA frameworks that range from 10 to >1,000 nm. Compared to pure DNA scaffolds, a tenfold increase in the Young's modulus (E modulus) of these composites was observed, owing to their soft inner core and solid silica shell. We further demonstrate the use of solidified DNA frameworks to create 3D metal plasmonic devices. This protocol provides a platform for synthesizing inorganic materials with unprecedented complexity and tailored structural properties. The whole protocol takes ~10 d to complete.
Identifiants
pubmed: 31270509
doi: 10.1038/s41596-019-0184-0
pii: 10.1038/s41596-019-0184-0
doi:
Substances chimiques
Nucleic Acids
0
Silicon Dioxide
7631-86-9
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
2416-2436Références
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