| Patent application number | Description | Published |
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| 20100221866 | Nano/Microwire Solar Cell Fabricated by Nano/Microsphere Lithography - Techniques for fabricating nanowire/microwire-based solar cells are provided. In one, a method for fabricating a solar cell is provided. The method includes the following steps. A doped substrate is provided. A monolayer of spheres is deposited onto the substrate. The spheres include nanospheres, microspheres or a combination thereof The spheres are trimmed to introduce space between individual spheres in the monolayer. The trimmed spheres are used as a mask to pattern wires in the substrate. The wires include nanowires, microwires or a combination thereof A doped emitter layer is formed on the patterned wires. A top contact electrode is deposited over the emitter layer. A bottom contact electrode is deposited on a side of the substrate opposite the wires. | 09-02-2010 |
| 20110068323 | Local Bottom Gates for Graphene and Carbon Nanotube Devices - Transistor devices having nanoscale material-based channels and techniques for the fabrication thereof are provided. In one aspect, a transistor device includes a substrate; an insulator on the substrate; a gate embedded in the insulator with a top surface of the gate being substantially coplanar with a surface of the insulator; a dielectric layer over the gate and insulator; a channel comprising a carbon nanostructure material formed on the dielectric layer over the gate, wherein the dielectric layer over the gate and the insulator provides a flat surface on which the channel is formed; and source and drain contacts connected by the channel. A method of fabricating a transistor device is also provided. | 03-24-2011 |
| 20110142743 | ISOLATION OF SINGLE-WALLED CARBON NANOTUBES FROM DOUBLE AND MULTI-WALLED CARBON NANOTUBES - A method and system are disclosed for separating single-walled carbon nanotubes from double and multi-walled carbon nanotubes by using the difference in the buoyant density of Single-Walled versus Multi-Walled carbon nanotubes. In one embodiment, the method comprises providing a vessel with first and second solutions. The first solution comprises a quantity of carbon nanotubes, including single-walled carbon nanotubes and double and multi-walled carbon nanotubes. The single walled nanotubes have a first density, the double and multi-walled nanotubes having a second density. The second solution in the vessel has a third density between said first and second densities. The vessel is centrifuged to form first and second layers in the vessel, with the second solution between said first and second layers. The single-walled carbon nanotubes are predominantly in the first layer, and the second and multi-walled carbon nanotubes are predominantly in the second layer. | 06-16-2011 |
| Patent application number | Description | Published |
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| 20090098347 | PHOTOSENSITIVE SELF-ASSEMBLED MONOLAYER FOR SELECTIVE PLACEMENT OF HYDROPHILIC STRUCTURES - A photosensitive monolayer is self-assembled on an oxide surface. The chemical compound of the photosensitive monolayer has three components. A first end group provides covalent bonds with the oxide surface for self assembly on the oxide surface. A photosensitive group that dissociates upon exposure to ultraviolet radiation is linked to the first end group. A second end group linked to the photosensitive group provides hydrophobicity. Upon exposure to the ultraviolet radiation, the dissociated photosensitive group is cleaved and forms a hydrophilic derivative in the exposed region, rendering the exposed region hydrophilic. Carbon nanotubes or nanocrystals applied in an aqueous dispersion are selectively attracted to the hydrophilic exposed region to from electrostatic bonding with the hydrophilic surface of the cleaved photosensitive group. | 04-16-2009 |
| 20090232724 | METHOD OF SEPARATING METALLIC AND SEMICONDUCTING CARBON NANOTUBES FROM A MIXTURE OF SAME - A method which permits large-scale separation of a semiconducting carbon nanotube from a mixture of metallic and semiconducting carbon nanotubes based on differences in solubility resulting from preferentially reacting the metallic carbon nanotubes with an acid functional aryldiazonium salt to form a substantially fully functionalized metallic nanotubes which can be easily separated from the unfunctionalized semiconducting carbon nanotubes. | 09-17-2009 |
| 20090291041 | METHODS FOR SEPERATING CARBON NANOTUBES BY ENHANCING THE DENSITY DIFFERENTIAL - A method for separating carbon nanotubes comprises: providing a mixture of carbon nanotubes; introducing an organic molecule having an end group capable of being chelated by a metal ion to the mixture of carbon nanotubes to covalently bond the organic molecule to at least one of the mixture of carbon nanotubes; and introducing a metal salt to the mixture of carbon nanotubes to chelate the end group of the organic molecule with the metal ion of the metal salt; and centrifuging the mixture of carbon nanotubes to cause the separation of the carbon nanotubes based on a density differential of the carbon nanotubes. | 11-26-2009 |
| 20100003616 | PHOTOSENSITIVE SELF-ASSEMBLED MONOLAYER FOR SELECTIVE PLACEMENT OF HYDROPHILIC STRUCTURES - A photosensitive monolayer is self-assembled on an oxide surface. The chemical compound of the photosensitive monolayer has three components. A first end group provides covalent bonds with the oxide surface for self assembly on the oxide surface. A photosensitive group that dissociates upon exposure to ultraviolet radiation is linked to the first end group. A second end group linked to the photosensitive group provides hydrophobicity. Upon exposure to the ultraviolet radiation, the dissociated photosensitive group is cleaved and forms a hydrophilic derivative in the exposed region, rendering the exposed region hydrophilic. Carbon nanotubes or nanocrystals applied in an aqueous dispersion are selectively attracted to the hydrophilic exposed region to from electrostatic bonding with the hydrophilic surface of the cleaved photosensitive group. | 01-07-2010 |
| 20100044678 | METHOD OF PLACING A SEMICONDUCTING NANOSTRUCTURE AND SEMICONDUCTOR DEVICE INCLUDING THE SEMICONDUCTING NANOSTRUCTURE - A method of placing a functionalized semiconducting nanostructure, includes functionalizing a semiconducting nanostructure including one of a nanowire and a nanocrystal, with an organic functionality including a functional group for bonding to a bonding surface, dispersing the functionalized semiconducting nanostructure in a solvent to form a dispersion, and depositing the dispersion onto the bonding surface. | 02-25-2010 |
| 20100129925 | SEMICONDUCTOR NANOWIRES CHARGE SENSOR - A semiconductor nanowire is coated with a chemical coating layer that comprises a functional material which modulates the quantity of free charge carriers within the semiconductor nanowire. The outer surface of the chemical coating layer includes a chemical group that facilitates bonding with molecules to be detected through electrostatic forces. The bonding between the chemical coating layer and the molecules alters the electrical charge distribution in the chemical coating layer, which alters the amount of the free charge carriers and the conductivity in the semiconductor nanowire. The coated semiconductor nanowire may be employed as a chemical sensor for the type of chemicals that bonds with the functional material in the chemical coating layer. Detection of such chemicals may indicate pH of a solution, a vapor pressure of a reactive material in gas phase, and/or a concentration of a molecule in a solution. | 05-27-2010 |
| 20100143847 | PHOTOSENSITIVE SELF-ASSEMBLED MONOLAYER FOR SELECTIVE PLACEMENT OF HYDROPHILIC STRUCTURES - A photosensitive monolayer is self-assembled on an oxide surface. The chemical compound of the photosensitive monolayer has three components. A first end group provides covalent bonds with the oxide surface for self assembly on the oxide surface. A photosensitive group that dissociates upon exposure to ultraviolet radiation is linked to the first end group. A second end group linked to the photosensitive group provides hydrophobicity. Upon exposure to the ultraviolet radiation, the dissociated photosensitive group is cleaved and forms a hydrophilic derivative in the exposed region, rendering the exposed region hydrophilic. Carbon nanotubes or nanocrystals applied in an aqueous dispersion are selectively attracted to the hydrophilic exposed region to from electrostatic bonding with the hydrophilic surface of the cleaved photosensitive group. | 06-10-2010 |
| 20110165428 | PHOTOSENSITIVE SELF-ASSEMBLED MONOLAYER FOR SELECTIVE PLACEMENT OF HYDROPHILIC STRUCTURES - A photosensitive monolayer is self-assembled on an oxide surface. The chemical compound of the photosensitive monolayer has three components. A first end group provides covalent bonds with the oxide surface for self assembly on the oxide surface. A photosensitive group that dissociates upon exposure to ultraviolet radiation is linked to the first end group. A second end group linked to the photosensitive group provides hydrophobicity. Upon exposure to the ultraviolet radiation, the dissociated photosensitive group is cleaved and forms a hydrophilic derivative in the exposed region, rendering the exposed region hydrophilic. Carbon nanotubes or nanocrystals applied in an aqueous dispersion are selectively attracted to the hydrophilic exposed region to from electrostatic bonding with the hydrophilic surface of the cleaved photosensitive group. | 07-07-2011 |
