Photo-induced electric polarizability of Fe(3)O(4) nanoparticles in weak optical fields

Using a developed co-precipitation method, we synthesized spherical Fe(3)O(4) nanoparticles with a wide nonlinear absorption band of visible radiation. Optical properties of the synthesized nanoparticles dispersed in an optically transparent copolymer of methyl methacrylate with styrene were studied...

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Detalles Bibliográficos
Autores principales: Milichko, Valentin A, Nechaev, Anton I, Valtsifer, Viktor A, Strelnikov, Vladimir N, Kulchin, Yurii N, Dzyuba, Vladimir P
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Nano Commentary
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3717034/
https://www.ncbi.nlm.nih.gov/pubmed/23837726
http://dx.doi.org/10.1186/1556-276X-8-317
Descripción
Sumario:Using a developed co-precipitation method, we synthesized spherical Fe(3)O(4) nanoparticles with a wide nonlinear absorption band of visible radiation. Optical properties of the synthesized nanoparticles dispersed in an optically transparent copolymer of methyl methacrylate with styrene were studied by optical spectroscopy and z-scan techniques. We found that the electric polarizability of Fe(3)O(4) nanoparticles is altered by low-intensity visible radiation (I ≤ 0.2 kW/cm(2); λ = 442 and 561 nm) and reaches a value of 10(7) Å(3). The change in polarizability is induced by the intraband phototransition of charge carriers. This optical effect may be employed to improve the drug uptake properties of Fe(3)O(4) nanoparticles. PACS: 33.15.Kr 78.67.Bf 42.70.Nq

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