Processible Nanostructured Materials with Electrical Conductivity and Magnetic Susceptibility: Preparation and Properties of Maghemite/Polyaniline Nanocomposite Films
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- 作者：Ben Zhong Tang ; Yanhou Geng ; Jacky Wing Yip Lam ; Bensheng Li ; Xiabin Jing ; Xianhong Wang ; Fosong Wang ; A. B. Pakhomov ; and X. X. Zhang
- 刊名：Chemistry of Materials
- 出版年：1999
- 出版时间：June 1999
- 年：1999
- 卷：11
- 期：6
- 页码：1581 - 1589
- 全文大小：125K
- 年卷期：v.11,no.6(June 1999)
- ISSN：1520-5002
文摘
We here present a versatile process for the preparation of maghemite/polyaniline (
-Fe2O3/PAn) nanocomposite films with macroscopic processibility, electrical conductivity, andmagnetic susceptibility. The -Fe2O3 nanoparticles are coated and the PAn chains are dopedby anionic surfactants of 
-methoxypoly(ethylene glycol) phosphate (PEOPA), 4-dodecylbenzenesulfonic acid (DBSA), and 10-camphorsulfonic acid (CSA). Both the coated -Fe2O3and the doped PAn are soluble in common organic solvents, and casting of the homogeneoussolutions gives free-standing nanocomposite films with -Fe2O3 contents up to ~50 wt %.The morphology of the -Fe2O3 nanoparticles are characterized by transmission electronmicroscopy, UV-vis spectroscopy, and X-ray diffractometry. The -Fe2O3/PAn films preparedfrom chloroform/m-cresol solutions of DBSA-coated -Fe2O3 and CSA-doped PAn areconductive (
= 82-237 S/cm) and superparamagnetic, exhibiting no hysteresis at roomtemperature. The zero-field-cooled magnetization experiment reveals that the nanocompositecontaining 20.8 wt % -Fe2O3 has a blocking temperature (Tb) in the temperature region of63-83 K.
-Fe2O3/PAn) nanocomposite films with macroscopic processibility, electrical conductivity, andmagnetic susceptibility. The -Fe2O3 nanoparticles are coated and the PAn chains are dopedby anionic surfactants of -methoxypoly(ethylene glycol) phosphate (PEOPA), 4-dodecylbenzenesulfonic acid (DBSA), and 10-camphorsulfonic acid (CSA). Both the coated -Fe2O3and the doped PAn are soluble in common organic solvents, and casting of the homogeneoussolutions gives free-standing nanocomposite films with -Fe2O3 contents up to ~50 wt %.The morphology of the -Fe2O3 nanoparticles are characterized by transmission electronmicroscopy, UV-vis spectroscopy, and X-ray diffractometry. The -Fe2O3/PAn films preparedfrom chloroform/m-cresol solutions of DBSA-coated -Fe2O3 and CSA-doped PAn areconductive ( = 82-237 S/cm) and superparamagnetic, exhibiting no hysteresis at roomtemperature. The zero-field-cooled magnetization experiment reveals that the nanocompositecontaining 20.8 wt % -Fe2O3 has a blocking temperature (Tb) in the temperature region of63-83 K.