Directed assembly of discrete gold nanoparticle groupings usingbranched DNA scaffolds
The concept of self-assembled dendrimers is explored for the creation of discrete nanoparticle assemblies. Hybridization of branched DNA trimers and nanoparticle-DNA conjugates results in the synthesis of nanoparticle trimer and tetramer complexes. Multiple tetramer architectures are investigated, utilizing Au-DNA conjugates with varying secondary structural motifs. Hybridization products are analyzed by gel electrophoresis, and discrete bands are observed corresponding to structures with increasing numbers of hybridization events. Samples extracted from each band are analyzed by transmission electron microscopy, and statistics compiled from micrographs are used to compare assembly characteristics for each architecture. Asymmetric structures are also produced in which both 5 and 10 nm Au particles are assembled on branched scaffolds.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; National Institutes of Health Contract 0980GFD623,National Science Foundation Grant EIA-0121368; Howard Hughes MedicalInstitute Predoctoral Fellowship, Bristol-Myers Squibb,Novartis
- DOE Contract Number:
- DE-AC02-05CH11231; NIH:0980GFD623
- OSTI ID:
- 881608
- Report Number(s):
- LBNL-59355; CMATEX; R&D Project: M50013; BnR: 600305000; TRN: US200612%%916
- Journal Information:
- Chemistry of Materials, Vol. 17, Issue 7; Related Information: Journal Publication Date: April 5,2005; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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