Abstract:
The present invention provides a method adhering a layer to a substrate that features defining first and second interfaces by having a composition present between the layer and the substrate that forms covalent bonds to the layer and adheres to the substrate employing one or more of covalent bonds, ionic bonds and Van der Waals forces. In this manner, the strength of the adhering force of the layer to the composition is assured to be stronger than the adhering force of the layer to the composition formed from a predetermined adhering mechanism, i.e., an adhering mechanism that does not include covalent bonding. Additionally, the present invention is directed to a composition of adhering together first and second materials. The composition features a multi-functional reactive compound that includes a backbone group and first and second functional groups; a cross-linker, and a catalyst. The first functional group is responsive to a first actinic energy to form cross-linked molecules and to adhere a subset of the cross-linked molecules to the first material. The second functional group is responsive to a second actinic energy, differing from the first actinic energy to adhere to the second material.
Abstract:
A method for forming hierarchical patterns on an article by nanoimprinting is disclosed. The method includes using a first mould to form a primary pattern on the article at a first temperature and a first pressure, the first temperature and the first temperature being able to reduce the elastic modulus of the article; and using a second mould to form a second pattern on the primary pattern at a second temperature that is below the article's glass transition temperature, the forming of the second pattern being at a second pressure.
Abstract:
A method of forming nanofluidic enclosed channels includes providing a first substrate having a layer of a first material disposed thereon. A plurality of nanoscale slots is formed along a second substrate using nanolithography, etching, or other disclosed techniques. The first substrate is then bonded to the second substrate such that the layer of the first material on the first substrate is adjacent the plurality of slots on the second substrate to define a plurality of enclosed nanofluidic channels therethrough.
Abstract:
The present invention provides a method of producing a polymer stamp (11) for the reproduction of devices comprising microstructures (5, 6) and nanostructures (3), the method comprising the steps of providing a first substrate (1), patterning nanostructures (3) into the first substrate material, patterning microstructures (5, 6) onto the first substrate (1), casting a polymer elastomer onto the first substrate (1) with nanostructures (3) and microstructures (5, 6) to form a polymer stamp (11) and releasing the polymer stamp (11). The present invention is further directed to a method of reproducing devices comprising microstructures and nanostructures comprising the steps of casting a final product (12) material onto the polymer stamp (11) comprising microstructures (5, 6) and nanostructures (3) produced according to the invention, wherein the microstructures (5, 6) and nanostructures (3) are transferred during the casting step to the final product (12), and releasing the final product (12) of the polymer stamp (11). In a preferred embodiment, the final device forms a part of a micro fuel cell system as a fuel delivery system (22) or a water management system (26).
Abstract:
L'invention a trait à un procédé de préparation d'un film polymérique présentant en surface des motifs nanométriques et étant microstructuré dans son épaisseur sur tout ou partie de celui-ci selon un système particulier comprenant les étapes suivantes : - une étape de choix d'au moins un copolymère bloc apte à se microstructurer selon le système particulier susmentionné à une température et selon au moins une épaisseur prédéterminée, ladite épaisseur prédéterminée correspondant à l'épaisseur du film pour tout ou partie duquel on souhaite la microstructuration selon le système particulier susmentionné ; - une étape de choix d'au moins un moule apte à conférer, après application sur un film comprenant ledit copolymère bloc, l'épaisseur prédéterminée et lesdits motifs nanométriques; et - une étape d'application dudit moule sur un film comprenant ledit copolymère bloc tout en chauffant à ladite température prédéterminée, moyennant quoi l'on obtient ledit film défini en objet.
Abstract:
Die Erfindung betrifft ein Verfahren, mit dem die Oberflächen von Körpern mit unterständigen Mikro- oder Nanostrukturen versehen sowie mikro- und/oder nanogroß durchbrochene Folien hergestellt werden können. Hierzu wird die aus Diamant, Hartmetall, Glas oder Keramik bestehende Spitze (2) zumindest eines nadelförmigen Prägewerkzeugs (1) unter Verwendung einer Positioniereinrichtung sehr oft auf verschiedene Stellen der Oberfläche des Körpers (3) gepresst, wodurch an allen Aufpressstellen Vertiefungen (4) eingeprägt und/oder Durchbrüche (5) erzeugt werden. Das Verfahren ist für die kostengünstige Herstellung von Urformen für den Polymer-Spritzguss von Mikro- oder Nanolinsenarrays, von Mikro- oder Nano-Prägewerkzeugen, von Mikroreaktoren ("lab on a chip"), von strukturierten Elektroden- sowie Wärmetauscherflächen, von lithografischen Masken und für die fälschungssichere Kennzeichnung von Gegendständen geeignet. Spezifische Signaturen können auch als Nachweis für nachträglich erfolgte Veränderungen oder Belastungen (Schrumpfung, plastische Verformung, Reibung, Verschleiß, Korrosion, Beschichtung) an Körpern dienen. - Fig. 1 -