摘要:
A method for controlling density, porosity and/or gap size within a nanotube fabric layer is disclosed. In one aspect, this can be accomplished by controlling the degree of rafting in a nanotube fabric. In one aspect, the method includes adjusting the concentration of individual nanotube elements dispersed in a nanotube application solution. A high concentration of individual nanotube elements will tend to promote rafting in a nanotube fabric layer formed using such a nanotube application solution, whereas a lower concentration will tend to discourage rafting. In another aspect, the method includes adjusting the concentration of ionic particles dispersed in a nanotube application solution. A low concentration of ionic particles will tend to promote rafting in a nanotube fabric layer formed using such a nanotube application solution, whereas a higher concentration will tend to discourage rafting. In other aspects, both concentration parameters are adjusted.
摘要:
In this invention, processes which can be used to achieve stable doped carbon nanotubes are disclosed. Preferred CNT structures and morphologies for achieving maximum doping effects are also described. Dopant formulations and methods for achieving doping of a broad distribution of tube types are also described.
摘要:
In this invention, processes which can be used to achieve stable doped carbon nanotubes are disclosed. Preferred CNT structures and morphologies for achieving maximum doping effects are also described. Dopant formulations and methods for achieving doping of a broad distribution of tube types are also described.
摘要:
This invention relates to heterogenous pore polymer nanotube membranes useful in filtration, such as reverse osmosis desalination, nanofiltration, ultrafiltration and gas separation.
摘要:
A carbon nanohorn (CNH) is oxidized to make an opening in the side of the CNH. A substance to be included, e.g., a metal, is introduced through the opening. The inclusion substance is moved to a tip part of the carbon nanohorn through heat treatment in vacuum or an inert gas. The CNH is further heat treated in an atmosphere containing oxygen in a low concentration to remove the carbon layer in the tip through catalysis of the inclusion substance. This exposes the inclusion substance. If the inclusion substance is a metal which is not moved to a tip part by the heat treatment in vacuum or an inert gas, the carbon part surrounding the fine catalyst particle is specifically burned by a heat treatment in an low oxygen concentration atmosphere, while utilizing the catalysis. Thus, the fine catalyst particle is fixed to the tip part of the CNH.
摘要:
This invention relates to heterogenous pore polymer nanotube membranes useful in filtration, such as reverse osmosis desalination, nanofiltration, ultrafiltration and gas separation.
摘要:
A single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by multi-wall carbon nanotubes or few wall carbon nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. The EAP actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.
摘要:
Gate electrodes are formed on a semiconducting carbon nanotube, followed by deposition and patterning of a hole-inducing material layer and an electron inducing material layer on the carbon nanotube according to the pattern of a one dimensional circuit layout. Electrical isolation may be provided by cutting a portion of the carbon nanotube, forming a reverse biased junction of a hole-induced region and an electron-induced region of the carbon nanotube, or electrically biasing a region through a dielectric layer between two device regions of the carbon nanotube. The carbon nanotubes may be arranged such that hole-inducing material layer and electron-inducing material layer may be assigned to each carbon nanotube to form periodic structures such as a static random access memory (SRAM) array.
摘要:
A free standing film includes: i. a matrix layer having opposing surfaces, and ii. an array of nanorods, where the nanorods are oriented to pass through the matrix layer and protrude an average distance of at least 1 micrometer through one or both surfaces of the matrix layer. A method for preparing the free standing film includes (a) providing an array of nanorods on a substrate, optionally (b) infiltrating the array with a sacrificial layer, (c) infiltrating the array with a matrix layer, thereby producing an infiltrated array, optionally (d) removing the sacrificial layer without removing the matrix layer, when step (b) is present, and (e) removing the infiltrated array from the substrate to form the free standing film. The free standing film is useful as an optical filter, ACF, or TIM, depending on the type and density of nanorods selected.
摘要:
Disclosed herein too is a method that includes dispersing nanotubes in media that comprises flavin moieties substituted with solubilizing side chains, and/or non-flavin containing molecular species; self-assembling the flavin moieties and other non-flavin containing molecular species in a pattern that is orderly wrapped around the nanotubes to form a composite; introducing desired amounts of an optional reagent that competes with self-assembly in order to disturb the wrapping around nanotubes with moderate order; and centrifuging the mass of the nanotubes and the composites to extract the composite from other nanotubes that are not in composite form.