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A Nonconventional Approach to Patterned Nanoarrays of DNA Strands for Template-Assisted Assembly of Polyfluorene Nanowires

Authors
Bae, Dong GeunJeong, Ji-EunKang, Seok HeeByun, MyunghwanHan, Dong-WookLin, ZhiqunWoo, Han YoungHong, Suck Won
Issue Date
17-8월-2016
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v.12, no.31, pp.4254 - 4263
Indexed
SCIE
SCOPUS
Journal Title
SMALL
Volume
12
Number
31
Start Page
4254
End Page
4263
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/87804
DOI
10.1002/smll.201601346
ISSN
1613-6810
Abstract
DNA molecules have been widely recognized as promising building blocks for constructing functional nanostructures with two main features, that is, self-assembly and rich chemical functionality. The intrinsic feature size of DNA makes it attractive for creating versatile nanostructures. Moreover, the ease of access to tune the surface of DNA by chemical functionalization offers numerous opportunities for many applications. Herein, a simple yet robust strategy is developed to yield the self-assembly of DNA by exploiting controlled evaporative assembly of DNA solution in a unique confined geometry. Intriguingly, depending on the concentration of DNA solution, highly aligned nanostructured fibrillar-like arrays and well-positioned concentric ring-like superstructures composed of DNAs are formed. Subsequently, the ring-like negatively charged DNA superstructures are employed as template to produce conductive organic nanowires on a silicon substrate by complexing with a positively charged conjugated polyelectrolyte poly[9,9-bis(6'-N,N,N-trimethylammoniumhexyl) fluorene dibromide] (PF2) through the strong electrostatic interaction. Finally, a monolithic integration of aligned arrays of DNA-templated PF2 nanowires to yield two DNA/PF2-based devices is demonstrated. It is envisioned that this strategy can be readily extended to pattern other biomolecules and may render a broad range of potential applications from the nucleotide sequence and hybridization as recognition events to transducing elements in chemical sensors.
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