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Title: Low coercive field and conducting nanocomposite formed by Fe{sub 3}O{sub 4} and poly(thiophene)

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 Fe{sub 3}O{sub 4} as particle agglomerates ranging from 15 to ca. 54 nm 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 (T{sub B}) for superparamagnetic particles in this assembly is above room temperature. - Graphical abstract: TEM image of magnetite/poly(thiophene) nanocomposite.

Authors:
;  [1];  [2]; ;  [3];  [4];  [5];  [6];  [1]
  1. Grupo de Materiais Polimericos e Compositos, Departamento de Quimica, Universidade Estadual de Maringa, Avenida Colombo 5790, 87020-900 Maringa, PR (Brazil)
  2. Faculdade de Ciencias Exatas e Tecnologia, Universidade Federal da Grande Dourados, 79804-970 Dourados, MS (Brazil)
  3. Grupo de Quimica de Materiais, Departamento de Quimica, Universidade Federal do Parana, CP 19081, 81531-990 Curitiba, PR (Brazil)
  4. Grupo de Materiais Especiais, Departamento de Fisica, Universidade Estadual de Maringa, Avenida Colombo 5790, 87020-900 Maringa, PR (Brazil)
  5. Departamento de Fisica, Universidade Estadual do Centro Oeste, CP 3010, 85040-080 Guarapuava, PR (Brazil)
  6. Grupo de Preparacao e Caracterizacao de Materiais, Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, CP 6165, 13083-970 Campinas, SP (Brazil)
Publication Date:
OSTI Identifier:
21043786
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 180; Journal Issue: 12; Other Information: DOI: 10.1016/j.jssc.2007.10.018; PII: S0022-4596(07)00423-9; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COOLING; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRON OXIDES; MAGNETIC FIELDS; MAGNETITE; MONOMERS; OXIDATION; POLYCYCLIC SULFUR HETEROCYCLES; SUPERPARAMAGNETISM; TEMPERATURE RANGE 0273-0400 K; THIOPHENE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Silva, R A, Santos, M J.L., Rinaldi, A W, Zarbin, A J.G., Oliveira, M M, Santos, I A, Cotica, L F, Coellho, A A, Rubira, A F, and Girotto, E.M. Low coercive field and conducting nanocomposite formed by Fe{sub 3}O{sub 4} and poly(thiophene). United States: N. p., 2007. Web. doi:10.1016/j.jssc.2007.10.018.
Silva, R A, Santos, M J.L., Rinaldi, A W, Zarbin, A J.G., Oliveira, M M, Santos, I A, Cotica, L F, Coellho, A A, Rubira, A F, & Girotto, E.M. Low coercive field and conducting nanocomposite formed by Fe{sub 3}O{sub 4} and poly(thiophene). United States. doi:10.1016/j.jssc.2007.10.018.
Silva, R A, Santos, M J.L., Rinaldi, A W, Zarbin, A J.G., Oliveira, M M, Santos, I A, Cotica, L F, Coellho, A A, Rubira, A F, and Girotto, E.M. Sat . "Low coercive field and conducting nanocomposite formed by Fe{sub 3}O{sub 4} and poly(thiophene)". United States. doi:10.1016/j.jssc.2007.10.018.
@article{osti_21043786,
title = {Low coercive field and conducting nanocomposite formed by Fe{sub 3}O{sub 4} and poly(thiophene)},
author = {Silva, R A and Santos, M J.L. and Rinaldi, A W and Zarbin, A J.G. and Oliveira, M M and Santos, I A and Cotica, L F and Coellho, A A and Rubira, A F and Girotto, E.M.},
abstractNote = {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 Fe{sub 3}O{sub 4} as particle agglomerates ranging from 15 to ca. 54 nm 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 (T{sub B}) for superparamagnetic particles in this assembly is above room temperature. - Graphical abstract: TEM image of magnetite/poly(thiophene) nanocomposite.},
doi = {10.1016/j.jssc.2007.10.018},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 12,
volume = 180,
place = {United States},
year = {2007},
month = {12}
}