Synthesis, conductivity and dielectric characterization of salicylic acid-Fe3O4 nanocomposite

被引：109

作者：

Unal, B. ^{[1
]}

Durmus, Z. ^{[2
]}

Kavas, H. ^{[1
]}

Baykal, A. ^{[2
]}

Toprak, M. S. ^{[3
]}

机构：

[1] Fatih Univ, Dept Phys, TR-34500 Istanbul, Turkey

[2] Fatih Univ, Dept Chem, TR-34500 Istanbul, Turkey

[3] Royal Inst Technol KTH, Funct Mat Div, SE-16440 Stockholm, Sweden

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 123卷 / 01期

关键词：

Nanostructures; Precipitation; Powder diffraction; Dielectric properties; SIZE-CONTROLLED SYNTHESIS; MAGNETITE NANOPARTICLES; ABSORPTION; MONOLAYERS; SILVER; FILMS; ACIDS;

D O I：

10.1016/j.matchemphys.2010.03.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the synthesis of water dispersible salicylic acid -Fe3O4 nanocomposites via a co-precipitation route by using Fe(III) and Fe(II) chloride salts, and salicylic acid. Crystalline phase was identified as Fe3O4 and the crystallite size was obtained as 13 +/- 6 nm from X-ray line profile fitting. As compared to the particle size of 20 nm obtained from TEM analysis these particles show polycrystalline nature. The capping of salicylic acid around Fe3O4 nanoparticles was confirmed by FTIR spectroscopy, the interaction being via bridging oxygens of the carboxylate and the nanoparticle surface. ac and dc conductivity measurements performed on the nanocomposite revealed semiconductor characteristics and varying trends with temperature due to reorganization of the nanocomposite. Permittivity measurements showed increasing dielectric constant with increasing temperature as expected from semiconductors. Analysis of electrical modulus and dielectric permittivity functions suggest that ionic and polymer segmental motions are strongly coupled in the nanocomposite. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：184 / 190

页数：7

共 52 条

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