The present invention provides: a graphite sheet polyimide film, which is derived from a first precursor composition comprising a first polyamic acid and comprises a sublimable inorganic filler and a spherical polyimide-based filler; a manufacturing method therefor; and a graphite sheet manufactured using the same.

Hybrid composite materials including carbon nanotube sheets and flexible ceramic materials, and methods of making the same are provided herein. In one embodiment, a method of forming a hybrid composite material is provided, the method including: placing a layer of a first flexible ceramic composite on a lay-up tooling surface; applying a sheet of a pre-preg carbon fiber reinforced polymer on the flexible ceramic composite; curing the flexible ceramic composite and the pre-preg carbon fiber reinforced polymer sheet together to form a hybrid composite material; and removing the hybrid composite material from the lay-up tooling surface, wherein the first flexible ceramic composite comprises an exterior surface of the hybrid composite material.

Provided is a fibrous carbon nanostructure with which a dispersion liquid having high dispersibility can be obtained without using a dispersant and thus with which a homogeneous film that is free of clumps can be obtained. In temperature programmed desorption of the fibrous carbon nanostructure, carboxyl group-derived carbon dioxide desorption among carbon dioxide desorption at from 25° C. to 1,000° C. is more than 1,200 μmol/g.

The present invention discloses a method for preparing surface-active onion-like carbon nanospheres based on vapor deposition, comprising: directly preparing high-surface-activity onion-like carbon nanospheres formed by coating ferroferric oxide nano-particles on an onion-like graphitized shell by taking liquid small organic molecule alkane n-dodecane as a carbon source to perform chemical vapor deposition at high temperature of 650˜700° C. in an inert carrier gas environment with existence of a ferrocene catalyst. An onion-like carbon nanosphere product prepared according to the present invention has good surface activity and thermal stability, is wide in practicability, and can be widely applied to the fields of adsorbing materials, energy storage materials, catalytic materials, medical materials and the like.

A method of making a stretchable film structure is provided. An elastic substrate is pre-stretched in a first direction and a second direction to obtain a pre-stretched elastic substrate. A carbon nanotube film structure is laid on a surface of the pre-stretched elastic substrate. The carbon nanotube film structure comprises a plurality of super-aligned carbon nanotube films stacked with each other. The pre-stretching the elastic substrate is removed and a plurality of wrinkles is formed on a surface of the carbon nanotube film structure to form the stretchable film structure. The present disclosure also relates to the stretchable film structure obtained by the above method.

A method for manufacturing diamond substrate of using source gas containing hydrocarbon gas and hydrogen gas to form diamond crystal on an underlying substrate by CVD method, to form a diamond crystal layer having nitrogen-vacancy centers in at least part of the diamond crystal, nitrogen or nitride gas is mixed in the source gas, wherein the source gas is: 0.005 volume % or more and 6.000 volume % or less of the hydrocarbon gas; 93.500 volume % or more and less than 99.995 volume % of the hydrogen gas; and 5.0×10.sup.−5 volume % or more and 5.0×10.sup.−1 volume % or less of the nitrogen gas or the nitride gas, and the diamond crystal layer having the nitrogen-vacancy centers is formed. A method for manufacturing a diamond substrate to form an underlying substrate, a diamond crystal having a dense nitrogen-vacancy centers (NVCs) with an orientation of NV axis by performing the CVD.

Carbon nanotube (CNT) forests or sheets coated and/or bonded at room temperature with one or more coatings were measured to produce thermal resistances that are on par with conventional metallic solders. These results were achieved by reducing the high contact resistance at CNT tips and/or sidewalls, which has encumbered the development of high-performance thermal interface materials based on CNTs. Resistances as low as 4.9±0.3 mm.sup.2-K/W were achieved for the entire polymer-coated CNT interface structure.

A tetrahedral amorphous hydrogenated carbon and amorphous siloxane hybrid diamond-like nanocomposite composition can include: tetrahedral amorphous hydrogenated carbon (ta-C:H); and amorphous siloxane (a-Si:O), wherein the ta-C:H and a-Si:O are in an interpenetrating network. A method of forming a tetrahedral amorphous hydrogenated carbon and amorphous siloxane hybrid diamond-like nanocomposite can include: providing a source of H, C, O, and Si as a liquid precursor; providing evaporated precursor into a vacuum chamber; forming a plasma with an RF plasma generator and/or a thermal plasma generator; and depositing, on a rotating biased substrate, a collimated layer of the tetrahedral amorphous hydrogenated carbon and amorphous siloxane hybrid diamond-like nanocomposite having tetrahedral amorphous hydrogenated carbon (ta-C:H) and amorphous siloxane (a-Si:O), wherein the ta-C:H and a-Si:O are in an interpenetrating network. A RF rotating electrode is also provided.

A method for depositing a conductive coating on a surface is provided, the method including treating the surface by depositing fullerene on the surface to produce a treated surface and depositing the conductive coating on the treated surface. The conductive coating generally includes magnesium. A product and an organic optoelectronic device produced according to the method are also provided.

A system and method for forming at least one of graphene and graphene oxide on a substrate and an opposed wear member. The system includes graphene and graphene oxide formed by an exfoliation process or solution processing method to dispose graphene and/or graphene oxide onto a substrate. The system further includes an opposing wear member disposed on another substrate and a gas atmosphere of an inert gas like N.sub.2, ambient, a humid atmosphere and a water solution.