Responsive hybrid nanotubes composed of block copolymer and gold nanoparticles

Sehoon Chang, Srikanth Singamaneni, Eugenia Kharlampieva, Seth L. Young, Vladimir V. Tsukruk

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

We demonstrate the facile fabrication of high aspect ratio nanotubes from responsive block copolymer, polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP), and in situ grown gold nanoparticles. PS-b-P2VP nanotubes are fabricated by template-assisted assembly by utilizing cylindrical pores of porous alumina membranes followed by its dissolution. Solvent annealing was employed to facilitate ordered phase separation of the block copolymer with in the nanotube structure, followed by in situ formation of gold nanoparticles in the P2VP domains occupying the inner and outer shell of the nanotubes. Owing to the pH-sensitive nature of P2VP block, which exhibits a coil to globule transition above pH 3.6, the PS-b-P2VP-gold nanoparticles hybrid nanotubes show reversible changes in topology, size (up to 25%), and collective plasmon resonance appearance. We suggest that PS-b-P2VP-gold nanoparticles hybrid nanotubes with their pH-responsive properties, large surface-to-volume ratio, and through open pore can find intriguing applications in sensing and microfluidic systems.

Original languageEnglish
Pages (from-to)5781-5785
Number of pages5
JournalMacromolecules
Volume42
Issue number15
DOIs
StatePublished - Aug 11 2009

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