Patent application number | Description | Published |
20080238882 | SYMMETRIC TOUCH SCREEN SYSTEM WITH CARBON NANOTUBE-BASED TRANSPARENT CONDUCTIVE ELECTRODE PAIRS - A symmetric touch screen switch system in which both the touch side and panelside transparent electrodes are comprised of carbon nanotube thin films is provided. The fabrication of various carbon nanotube enabled components and the assembly of a working prototype touch switch using those components is described. Various embodiments provide for a larger range of resistance and optical transparency for the both the electrodes, higher flexibility due to the excellent mechanical properties of carbon nanotubes. Certain embodiments of the symmetric, CNT-CNT touch switch achieve excellent optical transparency (<3% absorption loss due to CNT films) and a robust touch switching characteristics in an electrical test. | 10-02-2008 |
20090052246 | NON-VOLATILE SHADOW LATCH USING A NANOTUBE SWITCH - A non-volatile memory cell includes a volatile storage device that stores a corresponding logic state in response to electrical stimulus; and a shadow memory device coupled to the volatile storage device. The shadow memory device receives and stores the corresponding logic state in response to electrical stimulus. The shadow memory device includes a non-volatile nanotube switch that stores the corresponding state of the shadow device. | 02-26-2009 |
20090154218 | MEMORY ARRAYS USING NANOTUBE ARTICLES WITH REPROGRAMMABLE RESISTANCE - A memory array includes a plurality of memory cells, each of which receives a bit line, a first word line, and a second word line. Each memory cell includes a cell selection circuit, which allows the memory cell to be selected. Each memory cell also includes a two-terminal switching device, which includes first and second conductive terminals in electrical communication with a nanotube article. The memory array also includes a memory operation circuit, which is operably coupled to the bit line, the first word line, and the second word line of each cell. The circuit can select the cell by activating an appropriate line, and can apply appropriate electrical stimuli to an appropriate line to reprogrammably change the relative resistance of the nanotube article between the first and second terminals. The relative resistance corresponds to an informational state of the memory cell. | 06-18-2009 |
20100047522 | CARBON NANOTUBE-TRANSPARENT CONDUCTIVE INORGANIC NANOPARTICLES HYBRID THIN FILMS FOR TRANSPARENT CONDUCTIVE APPLICATIONS - An optically transparent, electrically conductive hybrid film includes a carbon nanotubes network deposited on a substrate, and a population of transparent conductive inorganic nanoparticles distributed throughout the carbon nanotubes network to provide a conductive transparent hybrid film. | 02-25-2010 |
20100051880 | AQUEOUS CARBON NANOTUBE APPLICATOR LIQUIDS AND METHODS FOR PRODUCING APPLICATOR LIQUIDS THEREOF - Certain applicator liquids and method of making the applicator liquids are described. The applicator liquids can be used to form nanotube films or fabrics of controlled properties. An applicator liquid for preparation of a nanotube film or fabric includes a controlled concentration of nanotubes dispersed in a liquid medium containing water. The controlled concentration is sufficient to form a nanotube fabric or film of preselected density and uniformity. | 03-04-2010 |
20100072042 | MEMORY ELEMENTS AND CROSS POINT SWITCHES AND ARRAYS OF SAME USING NONVOLATILE NANOTUBE BLOCKS - Under one aspect, a covered nanotube switch includes: (a) a nanotube element including an unaligned plurality of nanotubes, the nanotube element having a top surface, a bottom surface, and side surfaces; (b) first and second terminals in contact with the nanotube element, wherein the first terminal is disposed on and substantially covers the entire top surface of the nanotube element, and wherein the second terminal contacts at least a portion of the bottom surface of the nanotube element; and (c) control circuitry capable of applying electrical stimulus to the first and second terminals. The nanotube element can switch between a plurality of electronic states in response to a corresponding plurality of electrical stimuli applied by the control circuitry to the first and second terminals. For each different electronic state, the nanotube element provides an electrical pathway of different resistance between the first and second terminals. | 03-25-2010 |
20100147657 | NANOTUBE ESD PROTECTIVE DEVICES AND CORRESPONDING NONVOLATILE AND VOLATILE NANOTUBE SWITCHES - Device design methods for use with non-volatile nanotube switches are disclosed. In a first aspect of the present disclosure, a plurality of nonconductive nanoparticles is adhered to a nanotube element such as to provide an isolation barrier from a control electrode and further provide a switching gap above that element. In a second aspect of the present disclosure, conductive nanoparticles are dispersed and adhered to either a control electrode or to a nanotube element positioned over said electrode element such that the interface area (that is, the area of the nanotube element which comes into contact with the control electrode) is minimized. In a third aspect of the present disclosure, a monolayer network of nonconductive nanotubes is used to provide an isolation barrier between a control electrode and a nanotube element. Voids or spaces in said monolayer network further provides switching gaps. | 06-17-2010 |
20110027491 | ANISOTROPIC NANOTUBE FABRIC LAYERS AND FILMS AND METHODS OF FORMING SAME - Methods for forming anisotropic nanotube fabrics are disclosed. In one aspect, a nanotube application solution is rendered into a nematic state prior to its application over a substrate. In another aspect, a pump and narrow nozzle assembly are employed to realize a flow induced alignment of a plurality of individual nanotube elements as they are deposited onto a substrate element. In another aspect, nanotube adhesion promoter materials are used to form a patterned nanotube application layer, providing narrow channels over which nanotube elements will self align during an application process. Specific dip coating processes which are well suited for aiding in the creation of anisotropic nanotube fabrics are also disclosed. | 02-03-2011 |
20110027497 | ANISOTROPIC NANOTUBE FABRIC LAYERS AND FILMS AND METHODS OF FORMING SAME - Methods for forming anisotropic nanotube fabrics are disclosed. In one aspect, a nanotube application solution is rendered into a nematic state prior to its application over a substrate. In another aspect, a pump and narrow nozzle assembly are employed to realize a flow induced alignment of a plurality of individual nanotube elements as they are deposited onto a substrate element. In another aspect, nanotube adhesion promoter materials are used to form a patterned nanotube application layer, providing narrow channels over which nanotube elements will self align during an application process. Specific dip coating processes which are well suited for aiding in the creation of anisotropic nanotube fabrics are also disclosed. | 02-03-2011 |
20110044091 | TWO-TERMINAL NANOTUBE DEVICES AND SYSTEMS AND METHODS OF MAKING SAME - A two terminal memory device includes first and second conductive terminals and a nanotube article. The article has at least one nanotube, and overlaps at least a portion of each of the first and second terminals. The device also includes stimulus circuitry in electrical communication with at least one of the first and second terminals. The circuit is capable of applying first and second electrical stimuli to at least one of the first and second terminal(s) to change the relative resistance of the device between the first and second terminals between a relatively high resistance and a relatively low resistance. The relatively high resistance between the first and second terminals corresponds to a first state of the device, and the relatively low resistance between the first and second terminals corresponds to a second state of the device. | 02-24-2011 |
20110048277 | SOLVENT-BASED AND WATER-BASED CARBON NANOTUBE INKS WITH REMOVABLE ADDITIVES - In accordance with some embodiments, compositions and methods for forming solvent-based and water-based carbon nanotubes inks with removable additives are provided. In some embodiments, the ink composition comprises one or more carbon nanotubes, a solvent, and a removable additive, which may function as a stabilizing agent, a viscosity adjustment agent, or any suitable combination thereof. The removable additive may be removed from articles derived from the ink composition by means of thermal annealing. | 03-03-2011 |
20110132440 | FULLERENE-FUNCTIONALIZED PARTICLES, METHODS FOR MAKING THE SAME AND THEIR USE IN BULK-HETEROJUNCTION ORGANIC PHOTOVOLTAIC DEVICES - Core shell particles and bulk-heterojunction organic photovoltaic devices using the core shell particles are described. In particular, core shell particles having a core particle and a shell of a second material and bulk-heterojunction organic photovoltaic devices using the core-shell particles are described. The core-shell particles can have a core particle with an electron donating material or a core particle with an electron donating material. Formation of a hulk-heterojunction organic photovoltaic device using such an core-shell particles forming an interpenetrating network with the an electron donating or electron accepting phase is also described. | 06-09-2011 |
20110220859 | Two-Terminal Nanotube Devices And Systems And Methods Of Making Same - A two terminal memory device includes first and second conductive terminals and a nanotube article. The article has at least one nanotube, and overlaps at least a portion of each of the first and second terminals. The device also includes stimulus circuitry in electrical communication with at least one of the first and second terminals. The circuit is capable of applying first and second electrical stimuli to at least one of the first and second terminal(s) to change the relative resistance of the device between the first and second terminals between a relatively high resistance and a relatively low resistance. The relatively high resistance between the first and second terminals corresponds to a first state of the device, and the relatively low resistance between the first and second terminals corresponds to a second state of the device. | 09-15-2011 |
20120012919 | NONVOLATILE FLASH MEMORY STRUCTURES INCLUDING FULLERENE MOLECULES AND METHODS FOR MANUFACTURING THE SAME - Embodiments of tunneling barriers and methods for same can embed molecules exhibiting a monodispersion characteristic into a dielectric layer (e.g., between first and second layers forming a dielectric layer). In one embodiment, by embedding C | 01-19-2012 |
20120219881 | SOLUTION BASED NANOSTRUCTURED CARBON MATERIALS (NCM) COATINGS ON BIPOLAR PLATES IN FUEL CELLS - A bipolar plate for fuel cells includes a flow plate having a first surface for the introduction of hydrogen fuel gas and water vapor and a second surface for the introduction of an oxygen containing gas, wherein at least a portion of the first and/or second surface comprises a nanostructured carbon material (NCM) coating deposited thereon, said coating having a thickness of 1 nm to 5 μm. | 08-30-2012 |
20120261620 | FUNCTIONALIZED CARBON NANOTUBES EXHIBITING ENHANCED SOLUBILITY AND METHODS OF MAKING - Functionalized carbon nanotubes and dispersions containing functionalized carbon nanotubes are provided. Exemplary functionalized carbon nanotubes include optionally substituted indene-based moieties. Methods of making functionalized carbon nanotubes and dispersions containing functionalized carbon nanotubes are provided. Methods of making conductive carbon nanotube dispersions, including films, are provided. Such methods include heating carbon nanotubes in a solvent in the absence of externally applied energy, to obtain an adduct that includes the solvent moiety bound to the carbon nanotube. Where the solvent includes an indene-based compound, the carbon nanotube thus prepared includes optionally indene-based moieties bound to the carbon nanotubes. | 10-18-2012 |
20130009109 | Spin-Coatable Liquid for Formation of High Purity Nanotube Films - Certain spin-coatable liquids and application techniques are described, which can be used to form nanotube films or fabrics of controlled properties. A spin-coatable liquid for formation of a nanotube film includes a liquid medium containing a controlled concentration of purified nanotubes, wherein the controlled concentration is sufficient to form a nanotube fabric or film of preselected density and uniformity, and wherein the spin-coatable liquid comprises less than 1×10 | 01-10-2013 |
20130108793 | SOLVENT-BASED AND WATER-BASED CARBON NANOTUBE INKS WITH REMOVABLE ADDITIVES | 05-02-2013 |
20140241023 | Memory Elements and Cross Point Switches and Arrays for Same Using Nonvolatile Nanotube Blocks - Under one aspect, a covered nanotube switch includes: (a) a nanotube element including an unaligned plurality of nanotubes, the nanotube element having a top surface, a bottom surface, and side surfaces; (b) first and second terminals in contact with the nanotube element, wherein the first terminal is disposed on and substantially covers the entire top surface of the nanotube element, and wherein the second terminal contacts at least a portion of the bottom surface of the nanotube element; and (c) control circuitry capable of applying electrical stimulus to the first and second terminals. The nanotube element can switch between a plurality of electronic states in response to a corresponding plurality of electrical stimuli applied by the control circuitry to the first and second terminals. For each different electronic state, the nanotube element provides an electrical pathway of different resistance between the first and second terminals. | 08-28-2014 |
20140255820 | PROTON EXCHANGE MEMBRANE LAYERS FOR FUEL CELLS AND RELATED APPLICATIONS - A membrane stack that includes a first polymer layer, a second polymer layer, and a nanostructured carbon material layer between the first polymer layer and the second polymer layer. The nanostructured carbon material layer includes a plurality of nanostructured carbon material intercalated with one or more proton conducting material or coated with one or more solid superacid particles. The first polymer layer and the second polymer layer are capable of transporting protons. The membranes described herein can be used as polymer electrolyte membranes in fuel cells and electrolyzers. | 09-11-2014 |
20140326916 | FUNCTIONALIZED CARBON NANOTUBES EXHIBITING ENHANCED SOLUBILITY AND METHODS OF MAKING - Functionalized carbon nanotubes and dispersions containing functionalized carbon nanotubes are provided. Exemplary functionalized carbon nanotubes include optionally substituted indene-based moieties. Methods of making functionalized carbon nanotubes and dispersions containing functionalized carbon nanotubes are provided. Methods of making conductive carbon nanotube dispersions, including films, are provided. Such methods include heating carbon nanotubes in a solvent in the absence of externally applied energy, to obtain an adduct that includes the solvent moiety bound to the carbon nanotube. Where the solvent includes an indene-based compound, the carbon nanotube thus prepared includes optionally indene-based moieties bound to the carbon nanotubes. | 11-06-2014 |
20150086771 | SCALABLE NANOTUBE FABRICS AND METHODS FOR MAKING SAME - The present disclosure provides scalable nanotube fabrics and methods for controlling or otherwise adjusting the nanotube length distribution of a nanotube application solution in order to realize scalable nanotube fabrics. In one aspect of the present disclosure, one or more filtering operations are used to remove relatively long nanotube elements from a nanotube solution until nanotube length distribution of the nanotube solution conforms to a preselected or desired nanotube length distribution profile. In another aspect of the present disclosure, a sono-chemical cutting process is used to break up relatively long nanotube elements within a nanotube application solution into relatively short nanotube elements to realize a pre-selected or desired nanotube length distribution profile. | 03-26-2015 |