Title: Multifunctional capsules with oil core and shells of SiO₂ nanoparticles, nanodiamonds and polyelectrolyte layers with Fe₃O₄ nanoparticles

Authors: K.V. Palamarchuk; M.A. Vantsyan; R.A. Kamyshinsky; Y. González-Alfaro; T.V. Bukreeva

Addresses: Laboratory of Nanocapsules and Targeted Drug Delivery, National Research Center "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia ' Laboratory of Nanocapsules and Targeted Drug Delivery, National Research Center "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia ' Probe and Electron Microscopy Resource Center, National Research Center "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia; Electron Microscopy Laboratory, A.V.Shubnikov Institute of Crystallography FSRC "Crystallography and Photonics" RAS, Leninsky pr., 59, Moscow, 119333, Russia ' Centro de Estudios Avanzados de Cuba (CEAC), CITMA La Lisa, La Habana, 17100, Cuba ' Laboratory of Nanocapsules and Targeted Drug Delivery, National Research Center "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia; Laboratory of Bioorganic Structures, A.V.Shubnikov Institute of Crystallography FSRC "Crystallography and Photonics" RAS, Leninsky pr., 59, Moscow, 119333, Russia

Abstract: Multifunctional capsules based on Pickering emulsion and nanocomposite polyelectrolyte layers proved to be obtained and characterised. Direct emulsions were stabilised by mixture of nanodiamonds and SiO₂ nanoparticles. The influence of the nanoparticle mass ratio on emulsion stability, size and dispersity of droplets at different pH values was studied. Optimal conditions for Pickering emulsion formation were found. Up to nine polyelectrolyte layers were deposited onto emulsion droplets by layer-by-layer method. Capsules were sensitive to external magnetic field. This was achieved by adsorption of magnetite particles onto the capsule surface between polyelectrolyte layers.

Keywords: nanoparticles; Pickering emulsion; magnetite; nanodiamonds; silica; heteroaggregates; layer-by-layer technique; polyelectrolytes; colloidosomes; multifunctional capsules.

DOI: 10.1504/IJNT.2019.106622

International Journal of Nanotechnology, 2019 Vol.16 No.6/7/8/9/10, pp.510 - 521

Published online: 15 Apr 2020 *

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