Study of Iron oxide nanoparticles using Mossbauer spectroscopy with a high velocity resolution / Oshtrakh M. I.,Ushakov M. V.,Sepelak V.,Semionkin V. A.,Morais P. C. // SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY. - 2016. - V. 152, l. . - P. 666-679.

ISSN/EISSN:

1386-1425 / нет данных

Type:

Article

Abstract:

Iron oxide (magnetite and maghemite) nanoparticles developed for magnetic fluids were studied using Mossbauer spectroscopy with a high velocity resolution at 295 and 90 K. The recorded Mossbauer spectra have demonstrated that usual physical models based on octahedral and tetrahedral sites were not suitable for fitting. Alternatively, the Mossbauer spectra were nicely fitted using a large number of magnetic sextets. The obtained results showed that the Mossbauer spectra and the assessed parameters were different for nanoparticles as-prepared and dispersed in the dispersing fluid at 295 K. We claim that this finding is mainly due to the interaction of polar molecules with Iron cations at nanoparticle's surface or due to the surface coating using carboxylic-terminated molecules. It is assumed that the large number of spectral components may be related to complexity of the nanoparticle's characteristics and deviations from stoichiometry, including in the latter the influence of the oxidation of magnetite towards maghemite. (C) 2015 Elsevier B.V. All rights reserved.

Author keywords:

Magnetite nanoparticles; Maghemite nanoparticles; Magnetic fluids; Mossbauer spectroscopy MAGNETITE NANOPARTICLES; DRUG-DELIVERY; COPAIBA OIL; BIOMEDICAL-RESEARCH; ACID

DOI:

10.1016/j.saa.2015.06.017

Web of Science ID:

ISI:000365367100084

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN 5
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	MAGNETITE NANOPARTICLES; DRUG-DELIVERY; COPAIBA OIL; BIOMEDICAL-RESEARCH; ACID
Research-Areas	Spectroscopy
Web-of-Science-Categories	Spectroscopy
Author-Email	oshtrakh@gmail.com
ResearcherID-Numbers	Oshtrakh, Mikhail/L-8342-2016
ORCID-Numbers	Oshtrakh, Mikhail/0000-0002-2937-5194
Funding-Acknowledgement	Ministry of Education and Science of Russian Federation
Funding-Text	The authors thank Dr. S.V. Belikov, Dr. A.S. Yurovskikh and Dr. A.V. Chukin (Ural Federal University, Ekaterinburg) for XRD measurements and Prof. I. Felner (The Hebrew University, Jerusalem) for SEM with EDS measurements. We also thank Prof. E.C.D. Lima (Universidade Federal de Goias, Brazil) for providing us the gamma-Fe2O3 and gamma-Fe2O3-DMSA samples and the corresponding TEM micrographs. This work was supported by the basic financing from the Ministry of Education and Science of Russian Federation.
Number-of-Cited-References	24
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	35
Journal-ISO	Spectroc. Acta Pt. A-Molec. Biomolec. Spectr.
Doc-Delivery-Number	CX0DM