||I U P A C
Organizations & People
Pure Appl. Chem. Vol.
72, Nos. 1-2, pp. 157-162, 2000
Special Topic Issue on the Theme of
Processible nanomaterials with high conductivity and magnetizability.
Preparation and properties of maghemite/polyaniline nanocomposite films
Ben Zhong Tang*, Yanhou Geng, Qunhui Sun, Xi Xiang Zhang, and Xiabin
* Department of Chemistry, Hong Kong University of
Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
Abstract: A versatile process employing anionic surfactants
has been developed for the preparation of processible nanocomposite
films with electrical conductivity and magnetic susceptibility. Maghemite
nanoclusters (~10 nm in size) are coated with 4-dodecyl-benzenesulfonic
acid, and polyaniline (PAn) chains are doped with 10-camphorsulfonic
acid. The coated nanoclusters and doped polymers are soluble in common
solvents, and casting the solutions readily gives free-standing nanocomposite
films with nanocluster contents as high as ~50 wt %. The gFe2O3/PAn
nanocomposites show high conductivity (82�237 S cm -1 ) and magnetizability
(up to ~35 emu/g gFe2O3).
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