摘要:
Methods and systems are disclosed for fabricating ultra-low dielectric constant porous materials. In one aspect of the invention, a method for making porous low-k films is disclosed. The method uses polymer based porogens as sacrificial templates around which a chemical vapor deposition (CVD) or plasma enhanced chemical vapor deposition (PECVD) deposited matrix is formed. Upon pyrolysis, the porogens decompose resulting in a porous ultra-low dielectric material. This method can be used, for example, to produce porous organosilicate glass (OSG) materials, ultra-low dielectric nanoporous materials, porous ceramics, porous scaffolds, and/or porous metals. Various uses and embodiments of the methods and systems of this invention are disclosed.
摘要:
Processes for patterning radiation sensitive layers are disclosed. In one embodiment, the process includes depositing a radiation sensitive material on a substrate by chemical vapor deposition. The radiation sensitive material is exposed to radiation to form a pattern and the pattern is developed using a supercritical fluid (SCF).
摘要:
Described herein are reactors capable of sequentially or simultaneously depositing thin-film polymers onto a substrate by oxidative chemical vapor deposition (oCVD), initiated chemical vapor deposition (iCVD), and plasma-enhanced chemical vapor deposition (PECVD). The single-unit CVD reactors allow for the use of more than one CVD process on the same substrate without the risk of inadvertently exposing the substrate to ambient conditions when switching processes. Furthermore, the ability to deposit simultaneously polymers made by two different CVD processes allows for the exploration of new materials. In addition to assisting in the deposition of polymer films, plasma processes may be used to pretreat substrate surfaces before polymer deposition, or to clean the internal surfaces of the reactor between experiments.
摘要:
Disclosed is an organic coating with a high degree of global planarization. Further disclosed is an iPECVD-based method of coating a substrate with an organic layer having a high degree of global planarization. Disclosed is a flexible, alternating organic and inorganic multi-layer coating with low water permeability, a high-degree of transparency, and a high-degree of global planarization. Also disclosed is an iPECVD-based method of coating a substrate with the alternating organic and inorganic multi-layer coating.
摘要:
Described herein are all-dry encapsulation methods that enable well-defined polymers to be applied around particles. One aspect of the invention relates to a method of coating a particle, comprising the steps of: placing said particle in a vessel at a pressure; rotating said vessel at a rotating speed for a period of time; mixing together a first gaseous monomer at a first flow rate, and a gaseous initiator at a second flow rate, thereby forming a mixture; introducing said mixture into said vessel via a vapor feedline; heating said mixture, thereby forming a reactive mixture; contacting said particle with said reactive mixture; thereby forming a polymer coating on said particle. The methods may be modified forms of initiated chemical vapor deposition using a thermally-initiated radical polymerization to create conformal coatings around individual particles while avoiding agglomeration. Particle surfaces may be coated with a range of functional groups.
摘要:
A chemiresistive biosensor for detecting an analyte can include a high specific surface area substrate conformally coated with a conductive polymer, and a binding reagent immobilized on the conductive polymer, wherein the binding reagent has a specific affinity for the analyte. The conductive polymer can be deposited on a substrate by oCVD.
摘要:
One aspect of the invention relates to a linker-free, one-step method of grafting polymer films onto organic substrates, and the films obtained by such a method. In certain embodiments, the grafted polymer films are conductive. In certain embodiments, said grafting method utilizes the ability for Friedel-Crafts catalyst to form radical cations from organic substrates. In one embodiment, the method provides poly-3,4-ethylenedioxythiophene (PEDOT) thin films grafted to organic substrates. In other embodiments, the method is applicable to the polymerization of other monomers to yield conducting polymers, such as polyanilines, polypyrroles, polyfurans, polythiophenes and their derivatives. Remarkably, the polymer films grafted by the inventive methods show enormous increases in adhesion strength. Further, in certain embodiments, polymer patterns were easily obtained using the inventive methods and soft lithography techniques. In certain embodiments, well-defined high-density line-and-space patterns were successfully obtained. In certain embodiments, e.g., when the polymer film is conducting, the obtained conducting polymer pattern grafted on common organic substrates can be used for integrated circuitry in flexible electronics.
摘要:
Disclosed are methods of preparing antifouling and chlorine-resistant coatings on reverse osmosis membranes with initiated chemical vapor deposition. The coatings enhance the stability and lifetime of membranes without sacrificing performance characteristics, such as permeability or salt retention.
摘要:
Disclosed is an organic coating with a high degree of global planarization. Further disclosed is an iPECVD-based method of coating a substrate with an organic layer having a high degree of global planarization. Disclosed is a flexible, alternating organic and inorganic multi-layer coating with low water permeability, a high-degree of transparency, and a high-degree of global planarization. Also disclosed is an iPECVD-based method of coating a substrate with the alternating organic and inorganic multi-layer coating.
摘要:
Coated articles and methods and systems for coating the articles are described herein. The methods and systems described herein include, but are not limited to, steps for actively or passively controlling the temperature during the coating process, steps for providing intimate contact between the substrate and the support holding the substrate in order to maximize energy transfer, and/or steps for preparing gradient coatings. Methods for depositing high molecular weight polymeric coatings, end-capped polymer coatings, coatings covalently bonded to the substrate or one another, metallic coatings, and/or multilayer coatings are also disclosed. Deposition of coatings can be accelerated and/or improved by applying an electrical potential and/or through the use of inert gases.