Patent application number | Description | Published |
20080236804 | ELECTROTHERMAL INTERFACE MATERIAL ENHANCER - Vertically oriented carbon nanotubes (CNT) arrays have been simultaneously synthesized at relatively low growth temperatures (i.e., <700° C.) on both sides of aluminum foil via plasma enhanced chemical vapor deposition. The resulting CNT arrays were highly dense, and the average CNT diameter in the arrays was approximately 10 nm, A CNT TIM that consist of CNT arrays directly and simultaneously synthesized on both sides of aluminum foil has been fabricated. The TIM is insertable and allows temperature sensitive and/or rough substrates to be interfaced by highly conductive and conformable CNT arrays. The use of metallic foil is economical and may prove favorable in manufacturing due to its wide use. | 10-02-2008 |
20080241755 | CONTACT METALLIZATION OF CARBON NANOTUBES - In one embodiment, SWNTs are synthesized from an embedded catalyst in a modified porous anodic alumina (PAA) template. Pd is electrodeposited into the template to form nanowires that grow from an underlying conductive layer beneath the PAA and extend to the initiation sites of the SWNTs within each pore. Individual vertical channels of SWNTs are created, each with a vertical Pd nanowire back contact. Further Pd deposition results in annular Pd nanoparticles that form on portions of SWNTs extending onto the PAA surface. Two-terminal electrical characteristics produce linear I-V relationships, indicating ohmic contact in the devices. | 10-02-2008 |
20090194424 | CONTACT METALLIZATION OF CARBON NANOTUBES - In one embodiment, SWNTs are synthesized from an embedded catalyst in a modified porous anodic alumina (PAA) template. Pd is electrodeposited into the template to form nanowires that grow from an underlying conductive layer beneath the PAA and extend to the initiation sites of the SWNTs within each pore. Individual vertical channels of SWNTs are created, each with a vertical Pd nanowire back contact. Further Pd deposition results in annular Pd nanoparticles that form on portions of SWNTs extending onto the PAA surface. Two-terminal electrical characteristics produce linear I-V relationships, indicating ohmic contact in the devices. | 08-06-2009 |
20090236037 | METHOD OF BONDING CARBON NANOTUBES - A method to bond carbon nanotubes to a surface. The mechanism of this bonding is studied, and shows that intercalation of alkali ions is possibly the central mechanism. Bonding pull-off forces of 4-5 N/cm | 09-24-2009 |
20100200208 | METHODS FOR ATTACHING CARBON NANOTUBES TO A CARBON SUBSTRATE - Vertically oriented carbon nanotubes (CNT) arrays have been simultaneously synthesized at relatively low growth temperatures (i.e., <700° C.) on both sides of aluminum foil via plasma enhanced chemical vapor deposition. The resulting CNT arrays were highly dense, and the average CNT diameter in the arrays was approximately 10 nm, A CNT TIM that consist of CNT arrays directly and simultaneously synthesized on both sides of various types of foil has been fabricated. The TIM is insertable and allows temperature sensitive and/or rough substrates to be interfaced by highly conductive and conformable CNT arrays. The use of foil, including substrates fabricated from carbon (CNT woven arrays, exfoliated graphite sheets, bucky paper, and the like) is disclosed. | 08-12-2010 |
20100285514 | ELECTROCHEMICAL BIOSENSOR - Networks of single-walled carbon nanotubes (SWCNTs) decorated with Au-coated Pd (Au/Pd) nanocubes are employed as electrochemical biosensors that exhibit excellent sensitivity (2.6 mA mM | 11-11-2010 |
20100295023 | FIELD EFFECT TRANSISTOR FABRICATION FROM CARBON NANOTUBES - Methods and apparatus for an electronic device such as a field effect transistor. One embodiment includes fabrication of an FET utilizing single walled carbon nanotubes as the semiconducting material. In one embodiment, the FETs are vertical arrangements of SWCNTs, and in some embodiments prepared within porous anodic alumina (PAA). Various embodiments pertain to different methods for fabricating the drains, sources, and gates. | 11-25-2010 |
20110007477 | ENHANCEMENT OF THERMAL INTERFACE CONDUCTIVITIES WITH CARBON NANOTUBE ARRAYS - A method of forming a well-anchored carbon nanotube (CNT) array, as well as thermal interfaces that make use of CNT arrays to provide very high thermal contact conductance. A thermal interface is formed between two bodies by depositing a continuous array of carbon nanotubes on a first of the bodies so that, on mating the bodies, the continuous array is between surface portions of the first and second bodies. The thermal interface preferably includes a multilayer anchoring structure that promotes anchoring of the continuous array of carbon nanotubes to the first body. The anchoring structure includes a titanium bond layer contacting the surface portion of the first body, and an outermost layer with nickel or iron catalytic particles from which the continuous array of carbon nanotubes are nucleated and grown. Additional thermal interface materials (TIM's) can be used in combination with the continuous array of carbon nanotubes. | 01-13-2011 |
20110020539 | PALLADIUM THIOLATE BONDING OF CARBON NANOTUBES - Carbon nanotube (CNT) arrays are attractive thermal interface materials with high compliance and conductance that can remain effective over a wide temperature range. Disclosed herein are CNT interface structures in which free CNT ends are bonded using palladium hexadecanethiolate Pd(SC | 01-27-2011 |
20120112132 | Method Of Exploiting Particle Morphology To Optimize Granular Structure And Charge/Discharge Performance Of Lithium Ion Battery Cathodes - A method is provided for forming a high-capacity, high-rate lithium ion battery cathode material. The method includes providing a synthesized material of electrochemically active plate-shaped nanoparticles and adding a plurality of appropriately sized diluent particles to the plate-shaped nanoparticles to form a suspension. Any liquid is removed from the solution to form a composite material. The method also includes processing the composite material to form a high-capacity, high-rate lithium ion battery cathode material. | 05-10-2012 |
20120276327 | ELECTROTHERMAL INTERFACE MATERIAL ENHANCER - Vertically oriented carbon nanotubes (CNT) arrays have been simultaneously synthesized at relatively low growth temperatures (i.e., <700° C.) on both sides of aluminum foil via plasma enhanced chemical vapor deposition. The resulting CNT arrays were highly dense, and the average CNT diameter in the arrays was approximately 10 nm, A CNT TIM that consist of CNT arrays directly and simultaneously synthesized on both sides of aluminum foil has been fabricated. The TIM is insertable and allows temperature sensitive and/or rough substrates to be interfaced by highly conductive and conformable CNT arrays. The use of metallic foil is economical and may prove favorable in manufacturing due to its wide use. | 11-01-2012 |
20130056145 | METHOD OF BONDING CARBON NANOTUBES - A method to bond carbon nanotubes to a surface. The mechanism of this bonding is studied, and shows that intercalation of alkali ions is possibly the central mechanism. Bonding pull-off forces of 4-5 N/cm | 03-07-2013 |
20130295288 | PALLADIUM THIOLATE BONDING OF CARBON NANOTUBES - Carbon nanotube (CNT) arrays are attractive thermal interface materials with high compliance and conductance that can remain effective over a wide temperature range. Disclosed herein are CNT interface structures in which free CNT ends are bonded using palladium hexadecanethiolate Pd(SC | 11-07-2013 |
20140311708 | REFRIGERATION FROM GRAPHENE-BASED NANOEMITTERS - This disclosure presents the use of electrons as the ‘working fluid’ in conjunction with a solid nanomaterial that hinders electron coupling to the atomic lattice of the nanomaterial, i.e., they are out of equilibrium. The electrons can achieve very high effective temperatures with minimal heating of the solid lattice. These ‘hot’ electrons emit from the absorbing material, carrying both the light energy and energy acquired from the atomic lattice. Thus, the operation of this disclosure includes shining light on an object to make the object cool instead of heat. It is envisioned that one of ordinary skill in the art would find the operation quite counter-intuitive. | 10-23-2014 |
20140322608 | MODIFIED GRAPHITIC ELECTRODES FOR ELECTROCHEMICAL ENERGY STORAGE ENHANCEMENT - A method of graphitic petal synthesis includes a step of providing a flexible carbon substrate, such as that including carbon microfibers. The method further includes the step of subjecting flexible carbon substrate to microwave plasma enhanced chemical vapor deposition. The resulting synthesized graphitic petal structure may optionally be coated with PANI. | 10-30-2014 |
20150037515 | RAPID SYNTHESIS OF GRAPHENE AND FORMATION OF GRAPHENE STRUCTURES - A process for rapid synthesis of few-layer graphene films on Cu foil by microwave plasma chemical vapor deposition (MPCVD). The plasma/metal interaction can be useful for a rapid synthesis of such thin films. The process can produce films of controllable quality from amorphous to highly crystalline by adjusting plasma conditions during growth processes of ˜100 sec duration and with little or no supplemental substrate heating. Films have been characterized using Raman spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The results help to identify the stages involved in the MPCVD deposition of thin carbon films on Cu foil. In yet other embodiments, the films are doped during synthesis by introduction of nitrogen gas in the reactor. Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and scanning tunneling microscopy reveal crystal structure and chemical characteristics. Nitrogen concentrations up to approximately 2 atomic % are observed. The growth process requires only a few minutes without supplemental substrate heating and offers a promising path toward large-scale synthesis of nitrogen-doped graphene films. | 02-05-2015 |