Elasticity of polyelectrolyte multilayer microcapsules

Elasticity of polyelectrolyte multilayer microcapsules.

We present a novel approach to probe elastic properties of polyelectrolyte multilayer microcapsules. The method is based on measurements of the capsule load-deformation curves with the atomic force microscope. The experiment suggests that at low applied load deformations of the capsule shell are elastic. Using elastic theory of membranes we relate force, deformation, elastic moduli, and charact...

Polyelectrolyte Multilayer Microcapsules Containing Fluorescein Isothiocyanate- Concanavalin A/Glycogen Conjugates for Fluorometric Determination of Sugars

Polyelectrolyte multilayer microcapsules were prepared by a layer-by-layer deposition of poly(ethyleneimine) (PEI) or poly(allylamine hydrochloride) (PAH) and poly(styrene sulfonate) (PSS) on a calcium carbonate particle containing fluorescein isothiocyanateconcanavalin A (FITC-Con A)/glycogen conjugates. Fluorescence microscope and scanning electron microscope observations revealed that the mi...

Charge-controlled permeability of polyelectrolyte microcapsules.

Multilayer microcapsules showing unique charge-controlled permeability have been successfully fabricated by employing poly(styrene sulfonate) (PSS)-doped CaCO3 particles as templates. Encapsulation of the PSS molecules is thus achieved after core removal. Scanning force microscopy (SFM), UV-vis, Raman spectroscopy, and zeta-potential confirm the existence of the PSS molecules in the CaCO3 parti...

Lipid modified polyelectrolyte microcapsules with controlled diffusion.

The lipid coating introduced directly on (polystyrene sulfonate/polyallylamine hydrochloride)5 polyelectrolyte microcapsule surfaces significantly reduces the permeability of capsule walls estimated by fluorescence recovery after photobleaching (FRAP).

Polyelectrolyte Multilayer Capsule: a Review