Fabricating and Aligning p-Conjugated Polymer-Functionalized DNA Nanowires: Atomic Force Microscopic and Scanning Near-Field Optical Microscopic Studies

We report a simple method to functionalize DNA with *p-conjugated polymer, forming highly aligned and integrated arrays of *p-conjugated polymer nanowires of a few nanometers diameter. *p-conjugated polymer, polyphenazasiline, having alkylammonium salts on the N atom (PPhenaz-TMA), synthesized in th...

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Bibliographic Details
Published in:Langmuir 2005-07, Vol.21 (17), p.7945-7950
Main Authors: Hidenobu Nakao, Hidenobu Nakao Hideki Hayashi, Iwata, Futoshi, Karasawa, Hidenori, Hirano, Koji, Sugiyama, Shigeru, Ohtani, Toshio
Format: Article
Language:English
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Summary:We report a simple method to functionalize DNA with *p-conjugated polymer, forming highly aligned and integrated arrays of *p-conjugated polymer nanowires of a few nanometers diameter. *p-conjugated polymer, polyphenazasiline, having alkylammonium salts on the N atom (PPhenaz-TMA), synthesized in this study can be directly attached to DNA, which can be organized along stretched and aligned DNA molecules on surfaces as a template. Furthermore, PPhenaz-TMA/DNA nanowires were stretched and aligned on surfaces, even when PPhenaz-TMA/DNA complexes formed in solutions. The resulting PPhenaz-TMA/DNA nanowires could be easily converted to oxidized states or metallic nanowires by using adequate oxidant or metal salts. The direct visualization of PPhenaz-TMA/DNA nanowires and its structural changes have been studied by atomic force microscopy and scanning near-field optical microscopy.
ISSN:0743-7463
DOI:10.1021/la050145p