Patent application number | Description | Published |
20130240355 | FUNCTIONALIZATION OF GRAPHENE HOLES FOR DEIONIZATION - A method for deionization of a solution, the method comprising functionalizing plural apertures of a graphene sheet to repel first ions in the solution from transiting through the functionalized plural apertures. The non-transiting first ions influence second ions in the solution to not transit through the functionalized plural apertures. The graphene sheet is positioned between a solution flow path input and a solution flow path output. Solution enters the solution flow path input and through the functionalized plural apertures of the graphene sheet, resulting in a deionized solution on the solution flow path output side of the graphene sheet and a second solution containing the first ions and second ions on the solution flow path input side of the graphene sheet. | 09-19-2013 |
20130249147 | METHODS FOR PERFORATING GRAPHENE USING AN ACTIVATED GAS STREAM AND PERFORATED GRAPHENE PRODUCED THEREFROM - Graphene sheets having a plurality of holes in their basal planes are described herein. Methods for making the graphene sheets can involve contacting graphene sheets with an activated gas that has contacted a helium or argon atmospheric pressure plasma. The size and/or number of holes introduced can be altered by changing the contact time, the stand-off distance, the activated gas concentration, and/or the plasma power. Polymer composites containing the perforated graphene sheets are also described. | 09-26-2013 |
20140255621 | SYSTEMS AND METHODS FOR PRODUCTION OF GRAPHENE BY PLASMA-ENHANCED CHEMICAL VAPOR DEPOSITION - Production of bulk quantities of graphene for commercial ventures has proven difficult due to scalability issues in certain instances. Plasma-enhanced chemical vapor deposition of graphene can address at least some of these issues. Methods for production of graphene by plasma-enhanced chemical vapor deposition can include: providing a metal substrate and a carbonaceous electrode, at least a portion of the metal substrate being located proximate to the carbonaceous electrode with a gap defined therebetween; applying a potential between the metal substrate and the carbonaceous electrode; exciting a plasma-forming gas in the gap between the metal substrate and the carbonaceous electrode in the presence of the applied potential, thereby forming a plasma; ablating a reactive carbon species from the carbonaceous electrode in the presence of the plasma; and growing graphene on the metal substrate from the reactive carbon species. | 09-11-2014 |
20140263035 | METHOD FOR FORMING PERFORATED GRAPHENE WITH UNIFORM APERTURE SIZE - A method of forming a filter with uniform pore sizes includes synthesizing a moiety so as to form a plurality of like platelets having a precisely sized pore extending therethrough, distributing the plurality of like platelets about a membrane having apertures therethrough, and bonding the plurality of platelets around the apertures to form precisely sized pores through the membrane. A filtration membrane is also disclosed which provides a porous membrane having a plurality of apertures therethrough, and a plurality of platelets, wherein each platelet has a pore therethrough. The platelets are positioned over or in the apertures. | 09-18-2014 |
20140263178 | METHODS FOR CHEMICAL REACTION PERFORATION OF ATOMICALLY THIN MATERIALS - A method for forming a lattice with precisely sized holes includes disposing cutter molecules with species attached about the periphery of each molecule on to the lattice. The method continues with the species cutting molecular bonds of the lattice so as to form precisely sized holes in the lattice. The edges of the holes may then be functionalized. | 09-18-2014 |
20140272286 | NANOPOROUS MEMBRANES AND METHODS FOR MAKING THE SAME - A method for making a nanoporous membrane is disclosed. The method provides a composite film comprising an atomically thin material layer and a polymer layer, and then bombarding the composite film with energetic particles to form a plurality of pores through at least the atomically thin material layer. The nanoporous membrane also has a atomically thin material layer with a plurality of apertures therethrough and a polymer film layer adjacent one side of the graphene layer. The polymer film layer has a plurality of enlarged pores therethrough, which are aligned with the plurality of apertures. All of the enlarged pores may be concentrically aligned with all the apertures. In one embodiment the atomically thin material layer is graphene. | 09-18-2014 |
20150217219 | PROCESSES FOR FORMING COMPOSITE STRUCTURES WITH A TWO-DIMENSIONAL MATERIAL USING A POROUS, NON-SACRIFICIAL SUPPORTING LAYER - It can be difficult to remove atomically thin films, such as graphene, graphene-based material and other two-dimensional materials, from a growth substrate and then to transfer the thin films to a secondary substrate. Tearing and conformality issues can arise during the removal and transfer processes. Processes for forming a composite structure by manipulating a two-dimensional material, such as graphene or graphene-base material, can include: providing a two-dimensional material adhered to a growth substrate; depositing a supporting layer on the two-dimensional material while the two-dimensional material is adhered to the growth substrate; and releasing the two-dimensional material from the growth substrate, the two-dimensional material remaining in contact with the supporting layer following release of the two-dimensional material from the growth substrate. | 08-06-2015 |
20150221474 | METHODS FOR PERFORATING TWO-DIMENSIONAL MATERIALS USING A BROAD ION FIELD - Perforating graphene and other two-dimensional materials with holes inclusively having a desired size range, a narrow size distribution, and a high hole density can be difficult to achieve. A layer in continuous contact with graphene, graphene-based materials and other two-dimensional materials can help promote hole formation. Processes for perforating a two-dimensional material can include exposing to an ion source a two-dimensional material in continuous contact with at least one layer, and interacting a plurality of ions from the ion source with the two-dimensional material and with the at least one layer. The ion source may be a broad ion beam. | 08-06-2015 |