Issue 45, 2008
From the journal:

Physical Chemistry Chemical Physics

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

Dmitry A. Gorin,a   Sergey A. Portnov,a   Olga A. Inozemtseva,a   Zofia Luklinska,c   Alexey M. Yashchenok,a   Anton M. Pavlov,a   Andre G. Skirtach,b   Helmuth Möhwaldb  and  Gleb B. Sukhorukovc  

a Faculty of Nano- and Biomedical Technologies, Saratov State University, Saratov, Russia
E-mail: gorinda@info.sgu.ru, gorinda@mail.ru
Tel: +78452511181

b Max-Planck Institute of Colloids and Interfaces, Golm/Potsdam, Germany

c Department of Materials, Queen Mary University of London, London, UK

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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Article information

DOI
https://doi.org/10.1039/B809696A
Article type
Paper
Submitted
09 Jun 2008
Accepted
26 Aug 2008
First published
14 Oct 2008

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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