Comparative study of iron oxide nanoparticles as-prepared and dispersed in Copaiba oil using Mossbauer spectroscopy with low and high velocity resolution / Oshtrakh M. I.,Sepelak V.,Rodriguez A. F. R.,Semionkin V. A.,Ushakov M. V.,Santos J. G.,Silveira L. B.,Marmolejo E. M.,De Souza Parise M.,Morais P. C. // SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY. - 2013. - V. 100, l. SI. - P. 94-100.

ISSN/EISSN:

1386-1425 / нет данных

Type:

Article

Abstract:

Iron oxide nanoparticles, probably magnetite, as-prepared and dispersed in Copaiba oil were studied by Mossbauer spectroscopy using two different spectrometers: with a low velocity resolution (512 channels) for measurements at 295 and 21 K and with a high velocity resolution (4096 channels) for measurements at 295 and 90K. The fitting of all measured spectra demonstrated that usual models applied to fit Mossbauer spectra of magnetite and maghemite particles were not suitable. Therefore, the recorded spectra were fitted using a large number of spectral components on the basis of better quality of the fit and linearity of differential spectra. The number of components obtained for the better fit appeared to be different for spectra measured with a low and a high velocity resolution. However, these results demonstrated differences of Mossbauer parameters for iron oxide nanoparticles as-prepared and dispersed in Copaiba oil at applied temperatures. The effect of Copaiba oil molecules on Mossbauer parameters may be a result of the interactions of polar molecules such as kaurinic acid with nanoparticles' surface. (C) 2012 Published by Elsevier B.V.

Author keywords:

Mossbauer spectroscopy; Iron oxide nanoparticles; Magnetic fluids; Hyperfine interactions BIOMEDICAL-RESEARCH; MAGNETITE NANOPARTICLES; CONTAINING PROTEINS; MODEL COMPOUNDS; PARTICLES

DOI:

10.1016/j.saa.2012.02.080

Web of Science ID:

ISI:000312181800015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	BIOMEDICAL-RESEARCH; MAGNETITE NANOPARTICLES; CONTAINING PROTEINS; MODEL COMPOUNDS; PARTICLES
Research-Areas	Spectroscopy
Web-of-Science-Categories	Spectroscopy
Author-Email	oshtrakh@mail.utnet.ru
ResearcherID-Numbers	Rodriguez, Anselmo/D-7653-2014 Oshtrakh, Mikhail/L-8342-2016
ORCID-Numbers	Oshtrakh, Mikhail/0000-0002-2937-5194
Number-of-Cited-References	31
Usage-Count-Since-2013	50
Journal-ISO	Spectroc. Acta Pt. A-Molec. Biomolec. Spectr.
Doc-Delivery-Number	052EZ