Size Selected Synthesis Of Magnetite Nanoparticles In Chitosan Matrix

dc.creatorMorales M.A.
dc.creatorDe Souza Rodrigues E.C.
dc.creatorDe Amorim A.S.C.M.
dc.creatorSoares J.M.
dc.creatorGalembeck F.
dc.date2013
dc.date2015-06-25T19:16:01Z
dc.date2015-11-26T15:13:54Z
dc.date2015-06-25T19:16:01Z
dc.date2015-11-26T15:13:54Z
dc.date.accessioned2018-03-28T22:23:59Z
dc.date.available2018-03-28T22:23:59Z
dc.identifier
dc.identifierApplied Surface Science. , v. 275, n. , p. 71 - 74, 2013.
dc.identifier1694332
dc.identifier10.1016/j.apsusc.2013.01.123
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84877580914&partnerID=40&md5=3e5061f34e54d862ee34deffa241cd8f
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/89381
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/89381
dc.identifier2-s2.0-84877580914
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1258746
dc.descriptionWe report a new method to prepare magnetite nanoparticles with narrow size distribution and controlled particle size. Magnetite nanoparticles were prepared in the pores of the biopolymer chitosan. To develop pores with different sizes, chitosan was gelificated with several concentrations of the crosslinker glutaraldehyde. X-ray diffraction studies showed pattern characteristic for magnetite particles with diameters varying from 4 to 12.7 nm. Mössbauer spectra at room temperature showed only paramagnetic component for the smaller particles, and magnetic and paramagnetic components for the bigger particles, indicating the transition from superparamagnetic to blocked magnetic regime as the particle size increases. The zero field cooling (ZFC) magnetization measurements showed peak temperatures varying from 55 to 151.4 K. The ZFC peak temperatures showed a trend in agreement with the size of the particles. Considering the different experimental time window between Mössbauer spectroscopy and magnetometry, the results obtained from both techniques are in agreement. © 2013 Elsevier B.V.
dc.description275
dc.description
dc.description71
dc.description74
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dc.languageen
dc.publisher
dc.relationApplied Surface Science
dc.rightsfechado
dc.sourceScopus
dc.titleSize Selected Synthesis Of Magnetite Nanoparticles In Chitosan Matrix
dc.typeActas de congresos


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