Patent ID: 7179679

Claim:
A method of forming a multilayer thin film heterostructure comprising: applying a solution including a first water-soluble polymer selected from the group consisting of polyanionic species, polycationic species and uncharged polymer species onto a spinning substrate to form a first coating layer on said substrate; drying said first coating layer on said substrate; applying a solution including a second water-soluble polymer selected from the group consisting of polyanionic species, polycationic species and uncharged polymer species onto said substrate having said first coating layer thereon to form a second coating layer on said first coating layer, said second water-soluble polymer characterized as a different material than said first water-soluble polymer; drying said second coating layer on said first coating layer, so that a bilayer is built up upon said substrate; and repeating one or more additional applying and drying sequence with a water-soluble polymer selected from the group consisting of polyanionic species, polycationic species and uncharged polymer species, so that a predetermined plurality of layers are built up upon said substrate, said plurality of layers including multiple trilayers having a polycationic layer/polyanionic layer/uncharged polymer layer structure.