Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 183, Issue 1, Pages 99-104Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2009.10.019
Keywords
Biopolymer; Chitosan; Core/shell nanoparticles; Magnetite; Silver; Diluted magnet
Funding
- PROMEP [PROMEP/103.5/07/2523]
- CONACYT
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In the present work is reported the use of the biopolymer chitosan as template for the preparation of magnetite and magnetite/silver core/shell nanoparticles systems, following a two step procedure of magnetite nanoparticles in Situ precipitation and Subsequent silver ions reduction. The crystalline and morphological characteristics of both magnetite and magnetite/silver core/shell nanoparticles systems were analyzed by high resolution transmission electron microscopy (HRTEM) and nanobeam diffraction patterns (NBD). The results of these studies corroborate the core/shell morphology and the crystalline structure of the magnetite core and the silver shell. Moreover, magnetization temperature dependent, M(T), measurements show all unusual diluted magnetic behavior attributed to the dilution of the magnetic ordering in the magnetite and magnetite/silver core/shell nanoparticles systems. (C) 2009 Elsevier Inc. All rights reserved.
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