Shizuoka University

Yamaha Corporation

Jnc Corporation

Yoku Inoue

Shingo Sakakibara

Katsunori Suzuki

Koji Yataka

Yasuro Okumiya

Tauto Nakanishi

Takayuki Nakano

Masahiro Sugiura

Yoshiki Terada

Adrian Ghemes

Haibo Zhao

Morihiro Okada

Hidenori Mimura

The invention shows a production apparatus for producing carbon nanotubes by the gas-phase catalysis process, comprising: a first chamber having a growth region that is a region in which carbon nanotubes are formed; a first temperature adjustment device capable of adjusting a temperature of the growth region in the first chamber; a pressure adjustment device capable of adjusting a pressure in the first chamber; a first feed device capable of feeding a carbon source to the growth region in the first chamber; a second temperature adjustment device capable of adjusting a temperature of a solid-phase iron family element-containing material disposed in the production apparatus; and a second feed device capable of feeding a gas-phase halogen-containing substance into the production apparatus so that the iron family element-containing material of which the temperature is adjusted to a predetermined temperature by the second temperature adjustment device can react with the halogen-containing substance.

Production method for carbon nanotubes

The invention shows a production method for carbon nanotubes. The production method comprises a first step of feeding at least one kind of gas-phase catalyst into a first chamber, the at least one kind of gas-phase catalyst being formed from an iron family element-containing substance and a halogen-containing substance that are contained in a first liquid; and a second step of forming the carbon nanotubes from a carbon source fed into the first chamber using a catalyst generated based on the gas-phase catalyst existing in the first chamber, wherein the first step includes vaporization of the first liquid, and the first liquid does not contain the carbon source.

A strain sensor provided with a substrate that has flexibility; a carbon nanotube (CNT) film that is provided on the surface of the substrate and that has a plurality of CNT fibers oriented in one direction; and a pair of electrodes that are arranged at both ends in the orientation direction of the CNT fibers in the CNT film; in which the CNT film has a plurality of CNT fiber bundles that consist of the plurality of CNT fibers, and a resin layer that covers the peripheral surface of the plurality of the CNT fiber bundles and joins with the surface of the substrate.

Strain sensor

Carbon nanotubes are grown by supplying raw material gascomprising a carbon compound to be a raw material of the carbon nanotubes into the inside of a reaction vessel tubein which a catalystto grow the carbon nanotubes is charged. At this time, halogen-containing material gasto reduce the amount of a carbon product such as amorphous carbon produced besides carbon nanotubes that deposits on the surface of catalyst particlesdue to supply of the raw material gasis further supplied into the inside of the reaction vessel tube. Thereby, it is possible to produce elongated carbon nanotubes.

Method and apparatus for producing carbon nanotubes

A strain sensor includes a flexible substrate, a CNT film made of a plurality of CNT fibers aligned in an orientation direction, a pair of electrodes, and a protective coat. The electrodes are formed at the opposite ends of the CNT film in a perpendicular direction to the orientation direction of the CNT fibers. The protective coat protecting the CNT film is made of a resin, a water-based emulsion, or an oil-based emulsion. The protective coat is placed in contact with at least part of the CTN fibers on the surface of the CNT film. The strain sensor including the protective coat is able to prevent damage/breakage of the CNT film and to prevent foreign matters from entering into gaps between CNT fibers, thus improving durability in maintaining adequate sensing functionality.

Flexible strained sensor with protective coating

A chemical vapor deposition (CVD) device is equipped with a reaction vessel tube and a small vessel substrate in an electric furnace and with a heater and a thermocouple at the periphery thereof. A gas supply portion is connected to one of the reaction vessel tubes, and a pressure adjusting valve and an exhaust portion are connected to the other of the reaction vessel tubes, controlled by a control section such that the exhaust portion vacuum-exhausts the reaction vessel tube interior, the heater sublimates the small vessel substrate interior by rising temperature of catalyst iron chloride, and the gas supply portion bleeds an acetylene gas into the reaction vessel tube. As a result, iron chloride and the acetylene gas vapor-phase-react, a silicon oxide surface layer is formed to form growth nucleus of carbon nanotubes, and carbon nanotubes are grown so as to be oriented vertically.

Process and apparatus for producing carbon nanotube, carbon nanotube fiber, and the like

A heteroepitaxial growth method for gallium nitride yields gallium nitride which contains good quality fine crystals and has excellent optical properties, on a quartz substrate or a silicon substrate. The method comprises a step A of nitriding the surface of the substrate, and a step B of depositing or vapor depositing at least one atom layer of gallium.

Growing community of inventors

Hamamatsu, Japan

Yoku Inoue