Abstract: A corrosion inhibiting coating for active corrosion protection of a metal substrate includes, deposited on the metal substrate, a sandwich-like complex including a first inner layer of organic species, a corrosion inhibitor layer and a second outer layer of organic species, which coating is sensitive to at least one specific stimulus and releases the corrosion inhibitor in response to the stimulus.

Abstract: A corrosion inhibiting pigment includes nanoscale reservoirs (nanoreservoirs) of corrosion inhibitor for active corrosion protection of metallic products and structures, wherein the nanoreservoirs include a polymer or polyelectrolyte shell which is sensitive to a specific trigger and capable of releasing the inhibitor after action of the trigger. An anti-corrosive coating with self-healing properties includes the pigment, methods for preparing the pigment, in particular by layer-by-layer deposition, as well as methods of use of the pigment.

Abstract: The present invention relates to a method for remote control release of encapsulated substances by external forces such as ultrasound or light.

Abstract: The invention relates to capsules coated with a polyelectrolyte shell and methods for the production thereof.

Abstract: The invention relates to capsules coated with a polyelectrolyte shell and methods for the production thereof.

Abstract: The invention relates to capsules coated with a polyelectrolyte shell and methods for the production thereof.

Abstract: Method of layer-by-layer (LbL) assembly of oppositely charged polyelectrolytes was applied to coat fluorescein particles. These particles with a size of 4-9 &mgr;m were prepared by precipitation of fluorescein at pH 2. Polysterensulfonate (PSS) and polyallylamine (PAH) were used to compose the polyelectrolyte shell on the fluorescein core. The release of fluorescein molecules through the polyelectrolyte shell core dissolution was monitored at pH 8 by increasing fluorescence intensity. The number of polyelectrolyte layers sufficient to sustain fluorescence release was found to be 8-10. Sequentially adsorbed layers prolong core dissolution time for minutes. The permeability of polyelectrolyte multilayers of the thickness of 20 nm is about 10−8 m/s. Mechanism of fluorescence diffusion and osmotically supported release is under discussion. The features of release profile and possible applications or LbL method for shell formation in order to control release properties for entrapped materials are outlined.

Abstract: The invention relates to capsules coated with a polyelectrolyte shell and methods for the production thereof.

Abstract: The invention concerns a method for producing nanocapsules and microcapsules comprising a polyelectrolyte shell by surface precipitation from the solution, by applying a shell to template particles comprising the steps (a) providing a dispersion of template particles of suitable size in a salt-containing liquid phase which contains the components required to form the shell in a dissolved form and (b) precipitating the components from the liquid phase onto the template particles under conditions which enable the formation of a shell around the template particles that has a thickness of from 1 to 100 nm.

Abstract: The invention is directed to (i) the encapsulation of uncharged organic substances in polymeric capsules by using a multi-step strategy that involves charging the surface of the microcrystals with an amphiphilic substance, followed by consecutively depositing polyelectrolytes of opposite charge to assemble a multilayered shell of polymeric material around the microcrystal template, and (ii) the formation of polymer multilayer cages derived from the coated crystals by facile removal of the crystalline template.