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Issue 45, 2008
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Magnetic/gold nanoparticle functionalized biocompatible microcapsules with sensitivity to laser irradiation

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Abstract

Nanocomposite microcapsules with both gold and magnetite nanoparticles in the shell were prepared in a layer-by-layer procedure using biocompatible polyelectrolytes and nanoparticles. The process of a nanocomposite multilayer formation was investigated using a quartz crystal microbalance (QCM). In addition, nanocomposite microcapsules were characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX). It is found that the amount of adsorbed nanoparticles is similar for nanoparticles of various sizes, while the concentration of gold nanoparticles in the shell is higher for smaller nanoparticles. Adsorption of gold nanoparticles is found to be more effective than adsorption of magnetic nanoparticles. Multifunctionality of microcapsules is manifested by dual: magnetic and optical responses. Iron oxide nanoparticles embedded in the microcapsule shell allowed for control over capsules positioning by external magnetic fields. Furthermore, the nanocomposite microcapsules could be opened by laser irradiation; these results are of interest for medical and biological applications.

Graphical abstract: Magnetic/gold nanoparticle functionalized biocompatible microcapsules with sensitivity to laser irradiation

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Publication details

The article was received on 09 Jun 2008, accepted on 26 Aug 2008 and first published on 14 Oct 2008


Article type: Paper
DOI: 10.1039/B809696A
Citation: Phys. Chem. Chem. Phys., 2008,10, 6899-6905
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    Magnetic/gold nanoparticle functionalized biocompatible microcapsules with sensitivity to laser irradiation

    D. A. Gorin, S. A. Portnov, O. A. Inozemtseva, Z. Luklinska, A. M. Yashchenok, A. M. Pavlov, A. G. Skirtach, H. Möhwald and G. B. Sukhorukov, Phys. Chem. Chem. Phys., 2008, 10, 6899
    DOI: 10.1039/B809696A

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