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Magnetic and conducting Fe 3 O 4 –polypyrrole nanoparticles with core‐shell structure
Author(s) -
Deng Jianguo,
Peng Yuxing,
He Chuanlan,
Long Xingping,
Li Pei,
Chan Albert S C
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1237
Subject(s) - polypyrrole , materials science , x ray photoelectron spectroscopy , magnetization , dopant , thermal stability , nanoparticle , magnetic nanoparticles , sodium dodecylbenzenesulfonate , transmission electron microscopy , aqueous solution , chemical engineering , analytical chemistry (journal) , doping , composite material , pulmonary surfactant , nanotechnology , polymerization , chemistry , polymer , organic chemistry , magnetic field , physics , optoelectronics , quantum mechanics , engineering
Magnetic and conducting Fe 3 O 4 –polypyrrole nanoparticles with core‐shell structure were prepared in the presence of Fe 3 O 4 magnetic fluid in aqueous solution containing sodium dodecylbenzenesulfonate (NaDS) as a surfactant and dopant. Both the conductivity and magnetization of the composites depend strongly on the Fe 3 O 4 content and the doping degree. With increase of Fe 3 O 4 content in the composite, the conductivity at room temperature decreases, but the saturated magnetization and coercive force increase. Transmission electron microscopy (TEM) images of Fe 3 O 4 and Fe 3 O 4 –polypyrrole particles show almost spherical particles with diameters ranging from 20 to 30 and 30 to 40 nm, respectively. The thermal stability of Fe 3 O 4 –polypyrrole composites is higher than that of pure polypyrrole. Studies of IR, UV–visible and X‐ray photoelectron spectroscopy (XPS) spectra suggest that the increased thermal stability may be due to interactions between Fe 3 O 4 particles and polypyrrole backbone. Copyright © 2003 Society of Chemical Industry