Processible nanostructured materials with electrical conductivity and magnetic susceptibility: Preparation and properties of maghemite polyaniline nanocomposite films


Autoria(s): Tang BZ; Geng YH; Lam JWY; Li BS; Jing XB; Wang XH; Wang FS; Pakhomov AB; Zhang XX
Data(s)

1999

Resumo

We here present a versatile process for the preparation of maghemite/polyaniline (gamma-Fe2O3/ PAn) nanocomposite films with macroscopic processibility, electrical conductivity, and magnetic susceptibility. The gamma-Fe2O3 nanoparticles are coated and the PAn chains are doped by anionic surfactants of omega-methoxypoly(ethylene glycol) phosphate (PEOPA), 4-dodecylbenzenesulfonic acid (DBSA), and 10-camphorsulfonic acid (CSA). Both the coated gamma-Fe2O3 and the doped PAn are soluble in common organic solvents, and casting of the homogeneous solutions gives free-standing nanocomposite films with gamma-Fe2O3 contents up to similar to 50 wt %. The morphology of the gamma-Fe2O3 nanoparticles are characterized by transmission electron microscopy, UV-vis spectroscopy, and X-ray diffractometry. The gamma-Fe2O3/PAn films prepared from chloroform/m-cresol solutions of DBSA-coated gamma-Fe2O3 and CSA-doped PAn are conductive (sigma = 82-237 S/cm) and superpapamagnetic, exhibiting no hysteresis at room temperature. The zero-field-cooled magnetization experiment reveals that the nanocomposite containing 20.8 wt % gamma-Fe2O3 has a blocking temperature (T-b) in the temperature region of 63-83 K.

Identificador

http://202.98.16.49/handle/322003/21817

http://www.irgrid.ac.cn/handle/1471x/155643

Idioma(s)

英语

Fonte

Tang BZ;Geng YH;Lam JWY;Li BS;Jing XB;Wang XH;Wang FS;Pakhomov AB;Zhang XX.Processible nanostructured materials with electrical conductivity and magnetic susceptibility: Preparation and properties of maghemite polyaniline nanocomposite films,CHEMISTRY OF MATERIALS,1999,11(6):1581-1589

Palavras-Chave #FINE PARTICLE SYSTEM #LIQUID-CRYSTALLINE POLYACETYLENES #MATRIX-MEDIATED SYNTHESIS #NANOCRYSTALLINE GAMMA-FE2O3 #NANOMETER-SIZE #POLYPYRROLE #IRON #NANOPARTICLES #COMPOSITES #SOLVENTS
Tipo

期刊论文