Abstract:
Ultralong carbon nanotubes can be formed by placing a secondary chamber within a reactor chamber to restrict a flow to provide a laminar flow. Inner shells can be successively extracted from multi-walled carbon nanotubes (MWNTs) such as by applying a lateral force to an elongated tubular sidewall at a location between its two ends. The extracted shells can have varying electrical and mechanical properties that can be used to create useful materials, electrical devices, and mechanical devices.
Abstract:
The present invention provides apparatus and methods for growing fullerene nanotube forests, and forming nanotube films, threads and composite structures therefrom. In some embodiments, an interior-flow substrate includes a porous surface and one or more interior passages that provide reactant gas to an interior portion of a densely packed nanotube forest as it is growing. In some embodiments, a continuous-growth furnace is provided that includes an access port for removing nanotube forests without cooling the furnace substantially. In other embodiments, a nanotube film can be pulled from the nanotube forest without removing the forest from the furnace. A nanotube film loom is described. An apparatus for building layers of nanotube films on a continuous web is described.
Abstract:
The invention provides CVD-based methods for growing single-walled or multi-walled carbon nanotubes. In the The invention provides CVD-based methods for growing single-walled or multi-walled carbon nanotubes. In the methods of the invention, the nanotube growth environment is separated from the carbon-containing gas feed environment using a membrane which is substantially impermeable to gas flow but permits diffusion of carbon through the membrane. A catalyst for carbon nanotube growth is located on the growth side of the membrane while a catalyst for decomposition of carbon-containing gas is located on the feed side of the membrane. A path for diffusion of carbon through the membrane is provided between the growth and decomposition catalysts. Control of the size and shape of the carbon nanotube growth catalyst enables control over the nanotube structure formed.
Abstract:
Disclosed herein are apparatus and methods for selectively depositing molecular ions on nanoscale substrates such as carbon nanotube arrays using electrospray ionization.
Abstract:
Methods of treating single walled and multiwalled carbon nanotubes with ozone are provided. The carbon nanotubes are treated by contacting the carbon nanotubes with ozone at a temperature range between 0°C and 100°C to yield functionalized nanotubes which are greater in weight than the untreated carbon nonotubes. The carbon nonotubes treated according to methods of the invention can be used to prepare complex structures such as three dimensional networks or rigid porous structures which can be utilized to form electordes for fabrication of improved electrochemical capacitors. Useful catalyst supports are prepared by contacting carbon nanotube structures such as carbon nanotube aggregates, three dimensional network or rigid porous structures with ozone in the temperature range between 0°C and 100°C.
Abstract:
A method of functionalizing a carbon allotrope includes reacting a carbon allotrope with an alkali metal and an organohalide species to yield a first reaction product. The first reaction product reacts with a reactive species to yield a PEG-carbon allotrope conjugate. Water soluble CNTs and graphite are provided by this methods. A conjugate used in drug delivery includes at least one of a drug, an antibody, and a fluorescent tag. The conjugate further includes at least one of a PEG-CNT conjugate and a PEG-graphite conjugate.
Abstract:
The invention relates to carbon nanoparticles from fibers or tubes or combinations thereof, which have the morphology of macroscopic, spherical and/or spheroid secondary agglomerates, separated from each other. The invention also relates to a method for producing carbon nanoparticles by a CVD method using nanoporous catalyst particles having a spherical and/or spheroid secondary structure and comprising nanoparticulate metals and/or metal oxides or the precursors thereof as the catalytically active components. The inventive carbon nanoparticles are suitable for use in adsorbents, additives or active materials in energy accumulating systems, in supercapacitors, as filtering media, as catalysts or supports for catalysts, as sensors or as substrate for sensors, as additives for polymers, ceramics, metals and metal alloys, glasses, textiles and composite materials.