摘要:
A heavily boron-doped diamond thin film having superconductivity is deposited by chemical vapor deposition using gas mixture of at least carbon compound and boron compound, including hydrogen. An advantage of the diamond thin film deposited by the chemical vapor deposition is that it can contain boron at high concentration, especially in (111) oriented films. The boron-doped diamond thin film deposited by the chemical vapor deposition shows the characteristics of typical type II superconductor.
摘要:
Disclosed is a method capable of accelerating the growth of oriented carbon nanotubes when manufacturing the oriented carbon nanotubes by a plasma CVD. Under the circulation of a gas which is the raw material of the carbon nanotubes, plasma is generated by an antenna (6) provided in a depressurized treatment chamber (2), and substrates (9, 15) provided with a reaction prevention layer and a catalyst material layer which are formed on a base material are held at a distance, to which a radical can reach and an attack of an ion generated as a by-product of the radical can be avoided, from a plasma generation area (7). The tip (6a) of the antenna (6) can be controlled so as to match with the position of the anti-node of a stationary wave (27) of microwaves.
摘要:
A p channel field effect transistor in which the sensitivity of an enzyme can be enhanced by immobilizing the enzyme directly on an FET channel surface (diamond surface), as well as a sensor including the same, is provided. A diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals is treated under the action of glutaraldehyde OHC(CH2)3CHO (30), so that the glutaraldehyde (30) is immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals. Subsequently, urease (29) is further applied thereto, so that the amino group (31) of the urease (29) is bonded to the glutaraldehyde (30). That is, the urease (29) can be immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals. When the urea concentration is increased from 10−6 M to 10−2 M, the threshold voltage shifts by about 0.1 V in the positive direction, and the sensitivity to urea concentration of 30 mV/decade is exhibited.
摘要:
A p channel field effect transistor in which the sensitivity of an enzyme can be enhanced by immobilizing the enzyme directly on an FET channel surface (diamond surface), as well as a sensor including the same, is provided. A diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals is treated under the action of glutaraldehyde OHC(CH2)3CHO (30), so that the glutaraldehyde (30) is immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals. Subsequently, urease (29) is further applied thereto, so that the amino group (31) of the urease (29) is bonded to the glutaraldehyde (30). That is, the urease (29) can be immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals. When the urea concentration is increased from 10−6 M to 10−2 M, the threshold voltage shifts by about 0.1 V in the positive direction, and the sensitivity to urea concentration of 30 mV/decade is exhibited.
摘要:
A heavily boron-doped diamond thin film having superconductivity is deposited by chemical vapor deposition using gas mixture of at least carbon compound and boron compound, including hydrogen. An advantage of the diamond thin film deposited by the chemical vapor deposition is that it can contain boron at high concentration, especially in (111) oriented films. The boron-doped diamond thin film deposited by the chemical vapor deposition shows the characteristics of typical type II superconductor.
摘要:
A diamond semiconductor device having at least one MESFET integrated on a single diamond substrate and insulated from other semiconductor elements is made by preparing a homoepitaxial diamond film 1 having a hydrogen-terminated surface; then making a drain ohmic contact 3, a source ohmic contact 4, both of gold, and a gate electrode 5 of aluminum on the film 1; and changing a site of the hydrogen-terminated surface other than the site for the MESFET to be terminated with atoms other than hydrogen atoms.
摘要:
A solid state laser includes a diamond crystal as a medium of laser beam emission, which generates a laser beam having a wavelength of 225 to 300 nm through exciton light emission.
摘要:
A method is provided for the preparation of an electrode substrate for use in a liquid display device utilizing perpendicular alignment of liquid crystal and dichroic dye molecules. In the improved method, a base substrate bearing an electrode film is coated with an insulating film on the surface which contacts the liquid crystal. The insulating film is rubbed with cloth in a fixed direction and following the rubbing treatment, the rubbed surface is treated with a silane surfactant so that when the electrode substrate is employed in a liquid crystal display device, the liquid crystal and dye molecules are arranged in the direction of the major axes thereof in substantially perpendicular orientation at constant tilt angles in the same direction on the interface with said electrode substrate.
摘要:
A method of producing thin film transistor arrays and having at least 7 steps including: a first step of forming a first electrode layer uniformly over an insulating substrate; a second step of forming electrodes, such as drain and source electrodes and bus bars with a desired pattern by photoetching the first electrode; a third step of forming a uniform semiconducting layer on the surface of the substrate having the patterned electrodes; a fourth step of successively forming a uniform insulating layer over the uniformly deposited semiconducting layer while keeping the array in a vacuum; a fifth step of photoetching the uniformly deposited insulating layer into a desired pattern; a sixth step of photoetching the uniform semiconducting layer into the same pattern as the patterned insulating layer; a seventh step of forming a second electrode uniformly over the surface having the patterned electrodes and insulating layer; and an eighth step of photoetching the uniformly deposited second electrode into a desired pattern.
摘要:
The potential of aptamers as ligand binding molecule have opened new avenues in the development of biosensors for proteins, such as cancer oncoproteins. Disclosed herein is a label-free detection strategy using signaling aptamer/protein binding complex for proteins, such as platelet-derived growth factor (PDGF-BB) oncoprotein. The detection mechanism is based on the release of a fluorophore (e.g., TOTO intercalating dye) from the target binding aptamer's stem structure when it captures the protein, e.g., PDGF. Amino-terminated three-dimensional carbon microarrays fabricated by pyrolyzing patterned photoresist are used as a detection platform. The sensor showed near linear relationship between the relative fluorescence difference and protein concentration even in the sub-nanomolar range with an excellent detection limit of 5 pmol. This detection strategy is promising in a wide range of applications in the detection of cancer biomarkers and other proteins.