Carboxylated Polypyrrole-Silica Nanocomposite: Surface Analysis by XPS

Autor:	Steven P. Armes, Peter J. Tarcha, Robert W. Johnson, Lawrence Salvati
Rok vydání:	2001
Předmět:	Conductive polymer Materials science Nanoparticle Surfaces and Interfaces Condensed Matter Physics Polypyrrole Surfaces Coatings and Films chemistry.chemical_compound Colloid chemistry X-ray photoelectron spectroscopy Chemical engineering Covalent bond Polymer chemistry Macromolecule Pyrrole
Zdroj:	Surface Science Spectra. 8:317-322
ISSN:	1520-8575 1055-5269
DOI:	10.1116/11.20020103
Popis:	Carboxylated polypyrrole-silica colloids are synthesized in aqueous media by the oxidative copolymenzation of molar equivalents of pyrrole and 1-(2-carboxyethyl) pyrrole in the presence of ultrafine (20 nm) silica particles [see Maeda et al., Macromolecules 28, 2901 (1995)]. The resulting nanoparticles have a diameter of ∼100 nm as evidenced by transmission electron microscopy and disk centrifuge photosedimentometry and obtain 24–43 wt. % of silica. The conducting polymer component imparts intense coloration to the nanoparticle and the silica component ensures good colloidal stability. The surface carboxylic groups allow the covalent attachment of biological ligands of interest, such as antibodies. Thus these functional nanoparticles can be used as colored “markers” for immunodiagnostic assays.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1697837d944dd6590ea8f1054996835e https://doi.org/10.1116/11.20020103 Zobrazit plný text záznamu