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20 June 2007 Effect of microwave irradiation on composite iron oxide nanoparticle/polymer microcapsules
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Iron oxide nanoparticle/polymer microcapsules containing different number of layers of iron oxide nanoparticles have been made using the layer-by-layer alternating absorption technique. Nanoparticles as well as composite microcapsules have been characterized by TEM and SEM. The electronic paramagnetic resonance (EPR) spectra of water suspensions of iron oxide nanoparticles and microcapsules with iron oxide nanoparticles inside the capsule shell have been measured. Parameters of the EPR spectra are sensitivity to nanoparticle concentration in solution as well as to thermal and microwave microcapsules treatment. The shell permeability, as explored by confocal fluorescence microscopy, is decreased after temperature treatment of microcapsules but increased after microwave radiation. These results can find practical application in medicine and bioengineering for remote control over the permeability of microcapsule shells.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. A. Gorin, D. G. Shchukin, Yu. A. Koksharov, S. A. Portnov, K. Köhler, I. V. Taranov, V. V. Kislov, G. B. Khomutov, H. Möhwald, and G. B. Sukhorukov "Effect of microwave irradiation on composite iron oxide nanoparticle/polymer microcapsules", Proc. SPIE 6536, Saratov Fall Meeting 2006: Coherent Optics of Ordered and Random Media VII, 653604 (20 June 2007);

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