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Type: Artigo de periódico
Title: Low coercive field and conducting nanocomposite formed by Fe3O4 and poly(thiophene)
Author: Silva, RA
Santos, MJL
Rinaldi, AW
Zarbin, AJG
Oliveira, MM
Santos, IA
Cotica, LF
Coellho, AA
Rubira, AF
Girotto, EM
Abstract: Magnetite and poly(thiophene) composites have been produced by in situ monomer oxidation. Fourier transform infrared (FTIR) and X-ray diffraction (XRD) confirmed the presence of Fe3O4 as particle agglomerates ranging from 15 to ca. 54nm in size. Transmission electron micrographs (TEMs) revealed a face-to-face structure in both the pure magnetite and the nanocomposite. Typical superparamagnetic (ferrimagnetic) curves have been observed, whereas the relatively weak magnetic field employed in measurement, 200 Oe, was sufficient to split the curves completely. Zero field cooling (ZFC) and field cooling (FC) curves coincide only above room temperature, indicating that the characteristic blocking temperature (TB) for superparamagnetic particles in this assembly is above room temperature. (c) 2007 Elsevier Inc. All rights reserved.
Subject: poly(thiophene)
Country: EUA
Editor: Academic Press Inc Elsevier Science
Citation: Journal Of Solid State Chemistry. Academic Press Inc Elsevier Science, v. 180, n. 12, n. 3545, n. 3550, 2007.
Rights: fechado
Identifier DOI: 10.1016/j.jssc.2007.10.018
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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