Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Ernst-abbe-hochschule Jena

Christoph Morhard

Joachim P Spatz

Claudia Pacholski

Robert Brunner

Christian Williges

The invention provides a method for increasing the order of an array of polymeric micelles or of nanoparticles on a substrate surface comprising a) providing an ordered array of micelles or nanoparticles coated with a polymer shell on a substrate surface and b) annealing the array of micelles or nanoparticles by ultrasonication in a liquid medium which is selected from the group comprising HO, a polar organic solvent and a mixture of HO and a polar organic solvent. In a related aspect, the invention provides the highly ordered arrays of micelles or nanoparticles obtainable by the methods of the invention.

Highly ordered arrays of micelles or nanoparticles on a substrate surface and methods for producing the same

The invention relates to conical structures on substrate surfaces, in particular optical elements, to methods for the production thereof and to the use thereof, in particular in optical devices, solar cells and sensors. The conical nanostructures according to the invention are suitable in particular for providing substrate surfaces having very low light reflection. The method according to the invention for producing conical nanostructures on substrate surfaces comprises at least the steps of: a) providing a substrate surface covered with nanoparticles; b) etching the substrate surface covered with nanoparticles to a depth of at least 100 nm, wherein the nanoparticles act as an etching mask and the etching parameters are set in such a way that hyperboloid structures are produced underneath the nanoparticles; c) breaking the hyperboloid structures in the region of the smallest diameter by exerting mechanical forces, wherein the structures remaining on the substrate surface have a conical shape which corresponds substantially to half a single-shell hyperboloid.

Method for the production of conical nanostructures on substrate surfaces

The invention relates to a method for spatially resolving the enlargement and fine adjustment of precious metal nanoparticles according to size on a substrate surface and to the nanoparticle arrangements and nanostructured substrate surfaces thereby produced and to the use thereof. The invention particularly relates to a method for spatially resolving the enlargement of precious metal nanoparticles present on a substrate, comprising the following steps: a) providing a substrate coated by precious metal nanoparticles, b) optionally functionalizing the substrate by means of an agent which supports the adhesion of the precious metal nanoparticles to the substrate, c) contacting the substrate with a precious metal salt solution, d) UV irradiating the substrate in contact with the precious metal salt solution, thus creating a reduction of the precious metal salt and a currentless deposition of elementary precious metal on the precious metal nanoparticles and corresponding growth of the precious metal nanoparticles in the irradiated regions of the substrate, and e) optionally using a mask in order to create localized growth of the precious metal nanoparticles in predetermined regions of the substrate.

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Stuttgart, Germany

Christoph Morhard