期刊
NATURE NANOTECHNOLOGY
卷 5, 期 1, 页码 61-66出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2009.311
关键词
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资金
- National Science Foundation [CBET/NIRT 0608889, CCF/NANO/EMT 0622254, 0829951]
- Office of Naval Research [N00014-05-10562]
- Center on Functional Engineered Nano Architectures
A central challenge in nanotechnology is the parallel fabrication of complex geometries for nanodevices. Here we report a general method for arranging single-walled carbon nanotubes in two dimensions using DNA origami-a technique in which a long single strand of DNA is folded into a predetermined shape. We synthesize rectangular origami templates (similar to 75 nm x 95 nm) that display two lines of single-stranded DNA 'hooks' in a cross pattern with similar to 6 nm resolution. The perpendicular lines of hooks serve as sequence-specific binding sites for two types of nanotubes, each functionalized non-covalently with a distinct DNA linker molecule. The hook-binding domain of each linker is protected to ensure efficient hybridization. When origami templates and DNA-functionalized nanotubes are mixed, strand displacement-mediated deprotection and binding aligns the nanotubes into cross-junctions. Of several cross-junctions synthesized by this method, one demonstrated stable field-effect transistor-like behaviour. In such organizations of electronic components, DNA origami serves as a programmable nanobreadboard; thus, DNA origami may allow the rapid prototyping of complex nanotube-based structures.
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