Responsive Hybrid Nanotubes Composed of Block Copolymer and Gold Nanoparticles

Autor:	Sehoon Chang, Seth L. Young, Srikanth Singamaneni, Eugenia Kharlampieva, Vladimir V. Tsukruk
Rok vydání:	2009
Předmět:	Nanotube Materials science Fabrication Nanocomposite Polymers and Plastics Annealing (metallurgy) Organic Chemistry Polyelectrolyte Inorganic Chemistry Chemical engineering Colloidal gold Polymer chemistry Materials Chemistry Copolymer Dissolution
Zdroj:	Macromolecules. 42:5781-5785
ISSN:	1520-5835 0024-9297
Popis:	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 natureofP2VPblock, whichexhibits acoil toglobuletransition above pH3.6, thePS-b-P2VP- gold nanoparticles hybrid nanotubes show reversible changes in topology, size (up to 25%), and collective plasmonresonanceappearance.WesuggestthatPS-b-P2VP-goldnanoparticleshybridnanotubeswiththeir pH-responsive properties, large surface-to-volume ratio, and through open pore can find intriguing applications in sensing and microfluidic systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3adf60a0af114605c0ba747790f3f993 https://doi.org/10.1021/ma900767s Zobrazit plný text záznamu