A method for preparing multi-wall carbon nanotubes comprising atomizing a precursor solution comprising an aromatic hydrocarbon and a carrier gas. The mixture is then injected through an ultrasonic atomization system to form atomized precursor droplets. Then by injecting the atomized precursor droplets from the top of a vertical chemical vapor deposition reactor, the droplets can then react with a reaction gas in the reactor vessel to form a film that adsorbs to a growth surface in the reactor vessel. Layer by layer multi-wall carbon nanotubes are formed. This method is repeated to form layers of the multi-wall carbon nanotubes. The nanotubes formed have an outer diameter of 10 nm-51 nm and a length to diameter aspect ratio of 7200-13200.

A non-woven fabric is provided which includes a three-dimensional array of fibers. The three-dimensional array of fibers includes an array of standing fibers extending perpendicular to a plane of the non-woven fabric and attached to a base substrate, where the base substrate is one or more of an expendable film substrate, a metal base substrate, or a mandrel substrate. Further, the three-dimensional array of fibers includes multiple layers of non-woven parallel fibers running parallel to the plane of the non-woven fiber in between the array of standing fibers in a defined pattern of fiber layer orientations. In implementation, the array of standing fibers are grown to extend from the base substrate using laser-assisted chemical vapor deposition (LCVD).

Provided are a method for preparing a vertical branched graphene comprising treating a pristine vertical graphene with an inert plasma in the absence of an introduced carbon source to develop a vertical branched graphene. The method may also include pre-treating a substrate surface with an inert plasma; depositing a pristine vertical graphene onto the substrate surface by contacting the substrate surface with a deposition plasma comprising a carbon source gas for a deposition period. Also provided are a vertical branched graphene attached to a substrate surface, the vertical branched graphene having a trunk portion extending from the substrate surface, said trunk possessing an increased degree of branching as the distance from the substrate surface increases; and a freestanding branched graphene with a proximal end and a distal end, the proximal end comprising a trunk portion, the trunk portion possessing and increased degree of branching as the distance from the proximal end increases and the distance to the distal end decreases.

An electromechanical system for detecting cancerous state of a single cell. The electromechanical system includes an aspirating mechanism, an electrical measurement mechanism, and a processing mechanism. The aspirating mechanism is configured to extract a single cell from a suspension of a plurality of suspended biological cells, hold the extracted single cell, and apply a mechanical aspiration to the held single cell by applying a suction force to the held single cell. The electrical measurement mechanism is configured to apply a set of electrical signals to the single cell before and after applying the mechanical aspiration and measure two sets of electrical responses from the held single cell corresponding to the applied set of electrical signals before and after applying the mechanical aspiration The processing mechanism, including a data processor, configured to detect cancerous state of the single cell based on a difference between the two sets of electrical responses.

A method for producing a metal structure, including the steps of: providing a representation of the form of the structure; providing a gaseous photosensitive precursor having at least one metal and having at least one ligand with a metal-ligand bond between the at least one metal and the at least one ligand; providing a substrate having a surface, such that the gaseous photosensitive precursor surrounds at least the surface of the substrate; selecting a plurality of volume regions of the gaseous photosensitive precursor on the basis of the representation of the form of the structure; and exposing the plurality of selected volume regions of the gaseous photosensitive precursor to electromagnetic radiation, such that the metal-ligand bond is broken in the plurality of selected volume regions by means of multiphoton absorption and the metal is deposited on the surface of the substrate or on a previously formed volume segment of the structure.

A nanofiber structure is described that is composed of a substrate and a layer of oriented nanofibers. Nanofibers of the layer can be oriented in a common direction. An angle of the common direction can be selected so that nanofibers of the sheet are oriented at an angle with respect to an underlying substrate even if the underlying substrate is not planar. The angle can be used to adapt the sheets to demands as a thermal interface material.

In one embodiment, a product includes a plurality of carbon nanotubes and a fill material in interstitial spaces between the carbon nanotubes for limiting or preventing fluidic transfer between opposite sides of the product except through interiors of the carbon nanotubes. Moreover, the longitudinal axes of the carbon nanotubes are substantially parallel, where an average inner diameter of the carbon nanotubes is about 20 nanometers or less. In addition, the ends of the carbon nanotubes are open and the fill material is impermeable or having an average porosity that is less than the average inner diameter of the carbon nanotubes.

A method for preparing multi-wall carbon nanotubes comprising atomizing a precursor solution comprising an aromatic hydrocarbon and a carrier gas. The mixture is then injected through an ultrasonic atomization system to form atomized precursor droplets. Then by injecting the atomized precursor droplets from the top of a vertical chemical vapor deposition reactor, the droplets can then react with a reaction gas in the reactor vessel to form a film that adsorbs to a growth surface in the reactor vessel. Layer by layer multi-wall carbon nanotubes are formed. This method is repeated to form layers of the multi-wall carbon nanotubes. The nanotubes formed have an outer diameter of 10 nm-51 nm and a length to diameter aspect ratio of 7200-13200.

Provided is a polysilicon manufacturing apparatus including a reactor disposed on a base plate to form a reaction chamber, a pair of electrical feedthroughs installed on the base plate to be extended to the inside of the reaction chamber, rod filaments installed on the electrical feedthroughs in the reaction chamber and connected to each other by a rod bridge at the upper end to form a silicon rod by chemical vapor deposition of source gas introduced to a gas inlet, and a cooling jacket inserted to a through-hole provided at the upper side of the reactor to be supported to the base plate, connected to a gas outlet formed on the base plate by forming a gas passage discharging the gas after reaction, and introducing and circulating a low-temperature coolant to a coolant passage from the outside of the reactor by forming the coolant passage at the outside of the gas passage to discharge a high-temperature coolant to the outside of the reactor.

A method and apparatus for preparing boron nitride nanotubes (BNNTs) according to an embodiment may ensure mass-production, may increase yield by reducing a production time, and may prepare BNNTs with high purity. The method includes steps of providing a first powder including boron, forming a second powder including a boron precursor by nano-sizing the first powder, forming a precursor disk by mixing the second powder with a binder; and growing BNNTs on the precursor disk.