Abstract: This disclosure relates in general to three dimensional (“3D”) printers having a configuration that prepares a three-dimensional object by using a feedstock comprising a metal or a polymer compound and a carbon coating formed on a surface of the compound. This disclosure also relates to such feedstocks and their preparation methods. This disclosure further relates to 3D composite objects prepared by using such printers and feedstocks. This disclosure also relates to carbon containing photocurable formulations and methods for their preparation. This disclosure further relates to electrically conducting 3D polymer composites prepared by using such carbon containing photocurable formulations.

Abstract: This disclosure relates in general to three dimensional (“3D”) printers having a configuration that prepares a three-dimensional object by using a feedstock comprising a metal or a polymer compound and a carbon coating formed on a surface of the compound. This disclosure also relates to such feedstocks and their preparation methods. This disclosure further relates to 3D composite objects prepared by using such printers and feedstocks. This disclosure also relates to carbon containing photocurable formulations and methods for their preparation. This disclosure further relates to electrically conducting 3D polymer composites prepared by using such carbon containing photocurable formulations.

Abstract: Cohesive carbon assemblies are prepared by obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, dispersing the carbon in a selected organic solvent by mechanical mixing and/or sonication, and substantially removing the organic solvent, typically by evaporation, whereby the cohesive assembly of carbon is formed. The method is suitable for preparing free-standing, monolithic assemblies of carbon nanotubes in the form of films, wafers, or discs, having high carbon packing density and low electrical resistivity. The method is suitable for preparing adherent cohesive carbon assemblies on substrates comprising various materials. The assemblies have various potential applications, such as electrodes or current collectors in electrochemical capacitors, fuel cells, and batteries, or as electromagnetic interference shielding materials.

Abstract: A dual core geophone includes a dual magnetic core packaged in a housing providing higher sensitivity and a reduction of electric wires in the device. The geophone includes a locking mechanism for the dual magnetic core to protect the device from strong vibrations when the device is not in use. A method for measuring acoustic vibrations in a downhole with a dual core geophone as above includes locking the dual magnetic core when the geophone is not detecting acoustic vibrations.

Abstract: Highly purified carbon nanotubes (CNT) having virtually no carbonaceous impurities (amorphous carbon) nor inorganic impurities (metal and metal oxides), and methods of their preparation are described. The purified CNT feature excellent electrical, mechanical, and thermal properties due to the near total absence of detrimental impurities. The CNT starting material is preferably in the form of wafer, film, or buckypaper for efficient diffusion of purifying media. The highly pure CNT are prepared by heat treating a CNT starting material in a specified amount of oxygen, then treating the CNT in a solution comprising water and acid, or further heat treating the CNT in an atmosphere comprising chlorine (Cl2). Extremely low levels of inorganic impurities may be achieved by treating sequentially with a treatment solution followed by chlorine. Removal of chloride from purified CNT may be achieved by further treating the chlorine-treated material in an atmosphere comprising hydrogen (H2).

Abstract: Highly purified carbon nanotubes (CNT) having virtually no carbonaceous impurities (amorphous carbon) nor inorganic impurities (metal and metal oxides), and methods of their preparation are described. The purified CNT feature excellent electrical, mechanical, and thermal properties due to the near total absence of detrimental impurities. The CNT starting material is preferably in the form of wafer, film, or buckypaper for efficient diffusion of purifying media. The highly pure CNT are prepared by heat treating a CNT starting material in a specified amount of oxygen, then treating the CNT in a solution comprising water and acid, or further heat treating the CNT in an atmosphere comprising chlorine (Cl2). Extremely low levels of inorganic impurities may be achieved by treating sequentially with a treatment solution followed by chlorine. Removal of chloride from purified CNT may be achieved by further treating the chlorine-treated material in an atmosphere comprising hydrogen (H2).

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: Cohesive carbon assemblies are prepared by obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, dispersing the carbon in a selected organic solvent by mechanical mixing and/or sonication, and substantially removing the organic solvent, typically by evaporation, whereby the cohesive assembly of carbon is formed. The method is suitable for preparing free-standing, monolithic assemblies of carbon nanotubes in the form of films, wafers, or discs, having high carbon packing density and low electrical resistivity. The method is suitable for preparing adherent cohesive carbon assemblies on substrates comprising various materials. The assemblies have various potential applications, such as electrodes or current collectors in electrochemical capacitors, fuel cells, and batteries, or as electromagnetic interference shielding materials.

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: Cohesive carbon assemblies are prepared by obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, dispersing the carbon in a selected organic solvent by mechanical mixing and/or sonication, and substantially removing the organic solvent, typically by evaporation, whereby the cohesive assembly of carbon is formed. The method is suitable for preparing free-standing, monolithic assemblies of carbon nanotubes in the form of films, wafers, or discs, having high carbon packing density and low electrical resistivity. The method is suitable for preparing adherent cohesive carbon assemblies on substrates comprising various materials. The assemblies have various potential applications, such as electrodes or current collectors in electrochemical capacitors, fuel cells, and batteries, or as electromagnetic interference shielding materials.

Abstract: A dual core geophone includes a dual magnetic core packaged in a housing providing higher sensitivity and a reduction of electric wires in the device. The geophone includes a locking mechanism for the dual magnetic core to protect the device from strong vibrations when the device is not in use. A method for measuring acoustic vibrations in a downhole with a dual core geophone as above includes locking the dual magnetic core when the geophone is not detecting acoustic vibrations.

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: Coating compositions, and methods for depositing them on the surface of an article to produce an antireflection coating, are disclosed. In one embodiment, the coating composition includes a (meth)acrylate-functional silicon alkoxide, silica particles, a (meth)acrylate monomer, an epoxy (meth)acrylate oligomer, a photoinitiator, a solvent, an acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index less than about 1.60 at a wavelength of 510 nm. In another embodiment, the coating composition includes an organo-metallic compound other than an organo-metallic compound of silicon, an epoxy-functional silicon alkoxide, a non-epoxy-functional silicon alkoxide, a curing agent compatible with epoxy-functional molecules, a solvent, an inorganic acid, and water.

Abstract: Coating compositions, and methods for depositing them on the surface of an article to produce an antireflection coating, are disclosed. In one embodiment, the coating composition includes a (meth)acrylate-functional silicon alkoxide, silica particles, a (meth)acrylate monomer, an epoxy (meth)acrylate oligomer, a photoinitiator, a solvent, an acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index less than about 1.60 at a wavelength of 510 nm. In another embodiment, the coating composition includes an organo-metallic compound other than an organo-metallic compound of silicon, an epoxy-functional silicon alkoxide, a non-epoxy-functional silicon alkoxide, a curing agent compatible with epoxy-functional molecules, a solvent, an inorganic acid, and water.

Abstract: Cohesive carbon assemblies are prepared by obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, dispersing the carbon in a selected organic solvent by mechanical mixing and/or sonication, and substantially removing the organic solvent, typically by evaporation, whereby the cohesive assembly of carbon is formed. The method is suitable for preparing free-standing, monolithic assemblies of carbon nanotubes in the form of films, wafers, or discs, having high carbon packing density and low electrical resistivity. The method is suitable for preparing adherent cohesive carbon assemblies on substrates comprising various materials. The assemblies have various potential applications, such as electrodes or current collectors in electrochemical capacitors, fuel cells, and batteries, or as electromagnetic interference shielding materials.

Abstract: The present invention relates to a method of preparing purified carbon nanotubes (CNTs) comprising mixing starting CNTs with an organic solvent in the presence of sonication; substantially removing the organic solvent to obtain a CNT composition; and heating the CNT composition at 200° C. or higher to obtain the purified carbon nanotubes. The present invention further relates to the purified CNTs and cohesive CNT assemblies prepared from the method described herein, and articles (e.g. capacitor, energy storage device or capacitive deionization device) comprising the purified CNTs.

Abstract: An article comprising a substrate and an anti-reflection coating, and methods for depositing the coating, are disclosed. The coating comprises (a) a first coating layer having a high refractive index deposited on the substrate; (b) an epoxide-silica coating layer deposited onto the high refractive index coating layer, comprising an inorganic silica component and an organic organo-silicate component, and (c) a silica coating layer consisting essentially of silica, deposited directly onto the epoxide-silica coating layer. The anti-reflection coating optionally comprises a stack of coating layers, between the first high refractive index coating layer and the epoxide-silica coating layer, having alternating a low refractive index and a high refractive index. Individual coating layer compositions, refractive indexes, and thicknesses are carefully controlled such that reflectance is minimized through destructive interference in the visible light wavelength range of 400 to 700 nm.

Abstract: An article comprising a substrate and an anti-reflection coating, and methods for depositing the coating, are disclosed. The coating comprises (a) a first coating layer having a high refractive index deposited on the substrate; (b) an epoxide-silica coating layer deposited onto the high refractive index coating layer, comprising an inorganic silica component and an organic organo-silicate component, and (c) a silica coating layer consisting essentially of silica, deposited directly onto the epoxide-silica coating layer. The anti-reflection coating optionally comprises a stack of coating layers, between the first high refractive index coating layer and the epoxide-silica coating layer, having alternating a low refractive index and a high refractive index. Individual coating layer compositions, refractive indexes, and thicknesses are carefully controlled such that reflectance is minimized through destructive interference in the visible light wavelength range of 400 to 700 nm.