Photoacoustic investigation of maghemite-based nanocomposite

A F R Rodriguez; M F S Gilhermitti; F S E D V Faria; R M Cunha; J G Santos; A C Oliveira; M A Morales; D Rabelo; R B Azevedo; P C Morais

doi:10.1016/j.saa.2012.03.019

Photoacoustic investigation of maghemite-based nanocomposite

Spectrochim Acta A Mol Biomol Spectrosc. 2013 Jan 1:100:72-4. doi: 10.1016/j.saa.2012.03.019. Epub 2012 Mar 22.

Authors

A F R Rodriguez¹, M F S Gilhermitti, F S E D V Faria, R M Cunha, J G Santos, A C Oliveira, M A Morales, D Rabelo, R B Azevedo, P C Morais

Affiliation

¹ Universidade Federal do Acre, Centro de Ciências Biológicas e da Natureza, Rio Branco AC 69915-900, Brazil. [email protected]

PMID: 22483383
DOI: 10.1016/j.saa.2012.03.019

Abstract

Photoacoustic spectroscopy was used to investigate magnetic nanocomposites incorporating nanosized maghemite particles into styrene-divinylbenzene copolymer template. Typical photoacoustic features were observed in bands C, S and L in the wavelength region of 300-1000 nm. The relative intensity of band-C scaled with the nominal concentration of nanosized maghemite incorporated into the polymeric template whereas the lowest relative intensity of band-S was found in the sample in which the template polymerization took place in the presence of the highest polar-like reaction medium. X-ray diffraction and transmission electron microscopy were used to characterize the magnetic nanosized phase as maghemite, with average particle diameter of 6.9 nm (sample Est34), 7.0 nm (sample H30), and 7.9 nm (sample Em15).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ferric Compounds / chemistry*
Nanocomposites / chemistry*
Nanocomposites / ultrastructure
Particle Size
Photoacoustic Techniques / methods*
Spectrum Analysis
Temperature
X-Ray Diffraction

Substances

Ferric Compounds
ferric oxide