Magnetic Orientational Linear Dichroism Spectra of Magnetic Nanoparticles as a Probe of the Dispersion State

Hitoshi WATARAI; Sana SUBHAN MEMON SAKURAI; Hana SUBHAN MEMON SAKURAI

doi:10.2116/analsci.19C006

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Magnetic Orientational Linear Dichroism Spectra of Magnetic Nanoparticles as a Probe of the Dispersion State

Hitoshi WATARAI, Sana SUBHAN MEMON SAKURAI, Hana SUBHAN MEMON SAKURAI

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Keywords: Magnetic orientational linear dichroism, magnetic nanoparticles, agglomeration, rotational Brownian motion, Langevin analysis

JOURNAL FREE ACCESS

2019 Volume 35 Issue 9 Pages 951-954

DOI https://doi.org/10.2116/analsci.19C006

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Abstract

Magnetic orientational linear dichroism (MOLD) spectra of magnetic nanoparticles (MNPs) in the UV-Vis wavelength region were found to be useful as a probe to detect changes of the dispersion state due to a restriction of the rotational Brownian motion of MNPs; a change of the medium from liquid to resin and the formation of agglomerates in solution. The magnetic-field dependence of MOLD was analyzed by using the Langevin equation, which gave information about the magnetic moment of MNPs.

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