A process for manufacturing a porous diamond having a tridimensional (3D) structure. The process comprises the steps of using a substrate with a pre-defined shape and a plurality of pores of a defined porosity shape and size, heating a reactant hydrocarbon gas and reactant hydrogen in a filament to form a product gas, depositing an activated carbon atom from the product gas onto the substrate, wherein the activated carbon atom reacts with the substrate to form a diamond structure on the substrate, and completely removing the substrate to obtain the 3D pure porous diamond structure, wherein the 3D pure porous diamond structure is formed entirely of diamond and is identical in shape and porosity shape and size of the plurality of pores as that of the substrate. The 3D pure porous diamond structure formed is of a controlled thickness and porosity, and devoid of the substrate.

In an embodiment, a coated tool is disclosed. The coated tool includes a base material, a first layer on the base material, and a second layer coated on the first layer. The first layer contains diamond crystals therein and has a first mean crystal size. The second layer contains diamond crystals therein and has a second mean crystal size that is smaller than the first mean crystal size. The first and the second layers contain hydrogen, and have a first hydrogen content and a second hydrogen content respectively. The second hydrogen content is larger than the first hydrogen content.

A cutting tool such as a drill (1) in which a coating layer (6) is provided to the surface of a base body (5) having a rod shape, which is equipped with a cutting edge (2) provided to at least the tip portion (A) of the base body (5) having a rod shape and a chip discharge section (4) provided adjacent to the cutting edge (2) so as to extend rearwards (i.e., towards the rear end) from the tip portion (A), the coating layer (6) comprising a mixture phase of diamond and graphite and having a diamond content ratio which is lower in a rear end located 10 mm rearward from the tip than in the tip portion (A).

The diamond coated tool of the present invention is a diamond coated tool including a base material and a diamond layer coating a surface of the base material, and characterized in that the surface of the base material has an arithmetic average roughness Ra of not less than 0.1 m and not more than 10 m and an average length of roughness profile elements RSm of not less than 3.1 m and not more than 5.4 m, and that the diamond layer has a plurality of cavities at a portion bordering on the base material.

According to the present disclosure, a coated member is provided with a base material and a diamond layer located on the base material. When a ratio (SP3/SP2) obtainable from an SP3 peak derived from diamond crystals measurable by Raman spectroscopy and an SP2 peak derived from a graphite phase is referred to as an SP3 ratio, an SP3 ratio at a first measuring point with a thickness up to 1 m extending from an interface of the base material and the diamond layer toward the diamond layer is higher than an SP3 ratio at a second measuring point that is intermediate in a thickness direction of the diamond layer.

A method of manufacturing a diamond substrate includes: forming an ion implantation layer at a side of a main surface of a diamond seed substrate by implanting ions into the main surface of the diamond seed substrate; producing a diamond structure by growing a diamond growth layer by a vapor phase synthesis method on the main surface of the diamond seed substrate, after implanting the ions; and performing heat treatment on the diamond structure. The performed heat treatment causes the diamond structure to be separated along the ion implantation layer into a first structure including the diamond seed substrate and failing to include the diamond growth layer, and a diamond substrate including the diamond growth layer. Thus, the method of manufacturing a diamond substrate is provided that enables a diamond substrate with a large area to be manufactured in a short time and at a low cost.

Disclosed herein is a system and method for transistor pathogen virus detector in which one embodiment may include a substrate layer, a silicon dioxide layer on the substrate layer, a nanocrystalline diamond layer on the silicon dioxide layer, a graphene oxide layer on the nanocrystalline diamond layer, fluorinated graphene oxide portions; and a linker layer, the linker layer including a plurality of pathogen receptors.

The diamond coated tool of the present invention is a diamond coated tool including a base material and a diamond layer coating a surface of the base material, and characterized in that the surface of the base material has an arithmetic average roughness Ra of not less than 0.1 m and not more than 10 m and an average length of roughness profile elements RSm of not less than 3.1 m and not more than 5.4 m, and that the diamond layer has a plurality of cavities at a portion bordering on the base material.

Systems and methods of forming components from CVD single crystal diamonds that can withstand high temperatures and pressures, for example, in a mining and/or drilling environment. This may be accomplished by transforming a graphite powder by hot-filament chemical vapor deposition (HFCVD) into a CVD single diamond crystal powder, growing a plurality of CVD single diamond crystals on a planar surface of a substrate or on a dowel. In one example, if a substrate is used as the growth surface, the plurality of CVD single crystals grow in at least one layer on the substrate and at least a portion of the plurality of CVD single diamond crystals are removed from the substrate in the form of a plurality of discrete intact sheets of CVD single diamond crystals, stacked in a mold, and sintered, for example, to form a CVD single crystal diamond table.

A coated object and a method for producing a coated object are disclosed. In an embodiment, the coated object includes a substrate and an optical coating disposed on the substrate, wherein the optical coating includes a reflection-reducing layer sequence, which includes a covering layer with a refractive index n.sub.A and at least one diamond layer with a refractive index n.sub.D1>n.sub.A, wherein the diamond layer is disposed between the covering layer and the substrate and includes diamond crystals, and wherein the diamond layer has a layer thickness of less than 500 nm.