Dual-Functionalized Polymer Nanotubes as Substrates for Molecular-Probe and DNA-Carrier Applications

Authors

  • J. Jang,

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742, Korea
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  • S. Ko,

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742, Korea
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  • Y. Kim

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742, Korea
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  • This work was supported by the Brain-Korea 21 Program of the Korea Ministry of Education and by the Hyperstructured Organic Materials Research Center in Seoul National University.

Abstract

Bifunctionalized polymer nanotubes have been fabricated using vapor-deposition polymerization in FeCl3-adsorbed anodic aluminum oxide membranes followed by attachment of amine-functionalized silica nanoparticles. The prepared bifunctionalized polymer nanotubes are applied as both a molecular probe and a DNA carrier by conjugating pyreneacetic acid with the amine groups and immobilizing DNA with the carboxylic acid groups on the surface. The number of amine functional groups on the nanotubes' surface can be measured by means of the photoluminescence intensity of pyreneacetic acid conjugated with amine groups, and the number of the residual carboxylic acid groups is calculated by titration with sodium hydroxide. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy, and confocal laser scanning microscopy have been performed to confirm the complete polymerization of the monomer and the attachment of photoluminescent molecules and single-stranded DNA.

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