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US 9,956,529 B2Granted
Microfabricated ion-selective filter for filtration of ions and molecules
AssigneeNew York University
InventorsYong Ak Song, Supatra Yee Ping Lee, Nour Ashraf El Sayed Shabaka, Brian Kamau Ndirangu
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Abstract
A microfabricated filtration membrane including a substrate containing a plurality of micropores, an ion-selective layer, and at least two conductive layers configured to apply a voltage across the micropores. The geometry of the conductive layers matches the geometry of the micropores (or nanopores).
Claims20
A filtration membrane comprising:
- a substrate disposed between at least a first conducting layer and a second conducting layer;
- a plurality of pores extending through the first conductive layer, substrate, and second conductive layer, the plurality of pores selected from the group consisting of micropores, nanopores and combinations thereof, each of the plurality of pores having a pore sidewall comprised of the first conductive layer, the substrate, and the second conductive layer;
- each of the plurality of pores having an ion-selective layer disposed on the pore sidewall;
- and
- each of the first conductive layer and the second conductive layers configured to apply a voltage across the pores.
2 more elements
A filtration apparatus comprising:
- a housing, and
- a filtration membrane having a plurality of micropores, the filtration membrane comprising:
- at least two conductive layers separated from each other by a substrate;
- and
- each of the plurality of micropores having an ion-selective layer disposed on a sidewall and extending through the at least two conductive layers and the substrate,
- wherein the at least two conductive layers are in communication with a voltage source and further wherein the filtration membrane is configured to apply a voltage across the micropores.
3 more elements
A microfabrication process for the production of a filtration membrane, comprising:
- disposing an ion-selective layer on an interior surface of each of a plurality of pores of a substrate;
- disposing a first conductive layer over a first side of the substrate,
- disposing a second conductive layer over a second side of the substrate;
- wherein the filtration membrane comprises the first conductive layer, the substrate, and the second conductive layer with the plurality of pores extending therethrough and further wherein each of the plurality of pores has the ion-selective layer disposed therein on the interior surface.
1 more element
A micromachining process for the production of a filtration membrane, comprising:
- laminating an ion-selective layer between a first substrate and a second substrate,
- disposing a first conductive layer over a first side of the laminated structure,
- disposing a second conductive layer over a second side of the laminated structure, and
- forming a plurality of micropores, wherein each of the plurality of pores extends through all of the layers laminated structure and conductive layers.
1 more element
Dependencies are inferred from the claim text.