210 results about "Nanoporous membrane" patented technology

Nanoparticles having a mean particle size of less than about 25 nanometers and a mean pore size of less than 10 nanometers, and a mean surface area of at least 500 m2 / g; nanoporous films of such nanoparticles; and composites and devices containing such nanoparticles and nanoporous films.

Provided herein composition and methods for nanoporous membranes comprising single walled, double walled, or multi-walled carbon nanotubes embedded in a matrix material. Average pore size of the carbon nanotube can be 6 nm or less. These membranes are a robust platform for the study of confined molecular transport, with applications in liquid and gas separations and chemical sensing including desalination, dialysis, and fabric formation.

A photoelectrocatalytic oxidizing device having a photoanode being constructed from an anatase or rutile polymorph of Ti as the support electrode. Alternatively, the photoanode is a composite electrode comprising an anatase or rutile polymorph of Ti as the support electrode coated with a thin film of sintered nanoporous TiO2 derived from a stable, dispersed suspension of nanoparticulate TiO2. The device being useful for removing ammonia, protein and other contaminants from water in aquariums and aquacultures thereof. The device being cylindrical in shape and having a flow-through configuration. The method being directed at reducing the amount and concentration of ammonia in an aquarium or aquaculture system comprising providing an aqueous solution comprising water, NH3, NH4+ and 1 ppb to 200 g / L NaCl, and, photoelectrocatalytically oxidizing the NH3 and NH4+ to produce N2 gas, NO2− and NO3−, wherein the NH3 and NH4+ are oxidized on the surface of a photoanode constructed from an anatase polymorph of Ti, a rutile polymorph of Ti, or a nanoporous film of TiO2.

Devices and methods for cutaneous delivery of a composition are provided, wherein the composition is passed through an ordered nanoporous membrane in fluid communication with a reservoir. The nanoporous membrane includes a plurality of aligned hollow nanotubules coated with a continuous polymer matrix, and etched to open the plurality of hollow nanotubules and form pores. In one embodiment, the etching step oxidizes an end of the nanotubules to form carboxylate groups. The ordered nanoporous membrane further includes at least one additional functional unit bound to the carboxylate groups. The at least one additional functional unit selectively exposes or at least partially occludes the pore of an adjacent nanotubule, thereby controlling flux rate through the membrane. In one embodiment, application of an electrical impulse to the membrane causes the at least one additional functional unit to selectively expose or at least partially occlude the pore.

Provided are a nanoporous membrane and a method of fabricating the same. The nanoporous membrane includes a support, and a separation layer including a plurality of nano-sized pores at a density of 1010 / cm2 or greater and a matrix. The nanoporous membrane has a high flux and a high selectivity.

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.

The invention is a nanoporous membrane exchanger.

Anisotropic hydrophobic / hydrophilic nanoporous membranes and methods of forming anisotropic hydrophobic / hydrophilic nanoporous membranes are disclosed. The method of forming the nanoporous membrane includes growing a nanoporous oxide film on a substrate. A nanoporous membrane having a top side and a bottom side can then be formed by partially separating the nanoporous oxide film from the substrate. A fluorocarbon film can be deposited on the top side of the nanoporous membrane by plasma polymerization. The disclosed anisotropic hydrophobic / hydrophilic nanoporous membranes can have extremely different hydrophobicity between the top side and the bottom side of the nanoporous membrane.

Provided are a nanoporous membrane including a support; a first separation layer with a plurality of first nano-sized pores and a first matrix; and a second separation layer having a plurality of second pores respectively corresponding to the plurality of first pores of the first separation layer and a second matrix, and formed on the first separation layer, wherein a density of the plurality of the first pores and the second pores is equal to or greater than 1010 / cm2, and a diameter of each of the second pores is less than that of the corresponding first pore, a process of fabricating the same, and a device for a controlled release of biopharmaceuticals including the nanoporous membrane. The device for a controlled release of biopharmaceuticals including the nanoporous membrane can release biopharmaceuticals at a constant rate for a long period of time regardless of the concentration of the biopharmaceuticals including in pharmaceuticals, and high flex and selectivity.

A microbial fuel cell includes a bio-compatible body having a micro-pillar structure defining an anode compartment adapted to contain a catalyst that metabolizes glucose to generate electrons and protons. A nano-porous membrane prevents loss of the catalyst from the anode compartment, while providing fluid access for ingress of glucose fuel and egress of waste.

The invention relates to the production of nanoporous silica dielectric films and to semiconductor devices and integrated circuits comprising these improved films. The nanoporous films of the invention are prepared using silicon containing pre-polymers and are prepared by a process that allows crosslinking at lowered gel temperatures by means of a metal-ion-free onium or nucleophile catalyst.

In one aspect, the present invention provides a method of forming a film of nanocomposites of carbon nanotubes (CNTs) and platinum (Pt) nanoparticles. In one embodiment, the method includes the steps of (a) providing a first solution that contains a plurality of CNTs, (b) providing a second solution that contains a plurality of Pt nanoparticles, (c) combining the first solution and the second solution to form a third solution, and (d) filtering the third solution through a nanoporous membrane using vacuum filtration to obtain a film of nanocomposites of CNTs and Pt nanoparticles.