Layer-by-layer polymer coating on discrete particles of cubic lyotropic liquid crystalline dispersions (cubosomes)

Chantelle D Driever, Xavier Mulet, Lynne Waddington, Almar Postma, Helmut Thissen, Frank Caruso, Calum John Drummond

Research output: Contribution to journalArticleResearchpeer-review

30 Citations (Scopus)

Abstract

Cubic phase lyotropic liquid crystalline colloidal dispersions (cubosomes) were surface-modified with seven polyelectrolyte layers using a layer-by-layer (LbL) approach. The first layer consisted of a copolymer synthesized from methacrylic acid and oleoyl methacrylate for enhanced incorporation within the bilayer of the cubic nanostructure. Six additional layers of poly(l-lysine) and poly(methacrylic acid) were then sequentially added, followed by a washing procedure to remove polymer aggregates from the soft matter particles. Polymer buildup was monitored via microelectrophoresis, dynamic light scattering, and small-angle X-ray scattering. Polymer-coated cubosomes were observed with cryo-transmission electron microscopy. A potential application of the modified nanostructured particles presented in this study is to reduce the burst-release effect associated with drug-loaded cubosomes. The effectiveness of this approach was demonstrated through loading and release results from a model hydrophilic small molecule (fluorescein).
Original languageEnglish
Pages (from-to)12891 - 12900
Number of pages10
JournalLangmuir
Volume29
Issue number42
DOIs
Publication statusPublished - 2013

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