Taiyo Nippon Sanso Corporation

Nissin Electric Co., Ltd.

Otsuka Chemical Co., Ltd.

Mitsubishi Gas Chemical Company, Inc.

Japan Science and Technology Agency

Public University Corporation Osaka Prefecture University

Adv Antest Corporation

Osaka Prefecture

Technology Research Institute of Osaka Prefecture

Takeshi Nagasaka

Yoshikazu Nakayama

Toshiki Goto

Hiroyuki Tsuchiya

Toshikazu Nosaka

Osamu Suekane

Toru Sakai

Keisuke Shiono

Lujun Pan

Yoshiaki Inoue

Yoshio Yoshikawa

Isamu Yoshino

Shigeru Murabayashi

Yoshihiko Harima

Xu Li

Nobuharu Okazaki

Tetsuo Aoyama

Toshihiko Kobayashi

Takashi Okawa

Youichi Takizawa

Yugo Higashi

Takashi Nakata

Naohito Yoshimura

Yoshito Watanabe

Masaki Kondo

Masahiro Yamamura

An aggregate of carbon-based fine structures in which a plurality of carbon-based fine structures are collected, wherein respective carbon-based fine structures are oriented in the same direction. The above aggregate of carbon-based fine structures is an aggregate of a plurality of carbon-based fine structures in a state they are pulled by one another with strong interaction, and has such a length that allows the improvement of the handeability and workability thereof.

Carbon-based fine structure array, aggregate of carbon-based fine structures, use thereof and method for preparation thereof

This invention provides a method for forming a catalyst layer for carbon nanostructure growth, which can eliminate the influence of water in a liquid for catalyst layer formation, can grow homogeneous and highly oriented carbon nanostructures over the whole area of a substrate and can realize mass production of the carbon nanostructures, and a liquid for catalyst layer formation for use in the method, and a process for producing carbon nanostructures using the catalyst layer formed by the method. The catalyst layer for use in the production of CNTs is formed by preparing a catalyst metal salt solution of a catalyst metal-containing metal compound (a catalyst metal salt) dispersed or dissolved in a solvent having an ample wettability towards the substrate and coating the catalyst metal salt solution onto the substrate to a form a thin film. The thin film is then heat treated to form a catalyst layer. The substrate with the dried catalyst layer formed thereon is introduced into a carbon nanostructure synthetic device, and CNTs are grown by a thermal CVD method.

Process for producing a carbon nanostructure

A noise figure deriving device is provided to precisely obtain the noise figure (NF) of a receiver. The noise figure deriving device includes a first NF deriving unit that derives a first noise figure, which is a noise figure when a predetermined receiver-side pin pinR is connected to a receiver, based on a ratio Y of one power to the other power of two types of reference noise. The noise figure deriving device also includes a second NF deriving unit that derives a second noise figure, which is a noise figure when receiver-side pins pinR, pinR, and pinR are connected to the receiver, based on an inter-measurement-device-side-terminal difference and the first noise figure. The inter-measurement-device-side-terminal difference is a difference between the first noise figure and the second noise figure.

Excessive noise ratio deriving device, noise figure deriving device, method, program, and recording medium

It is intended to highly efficiently produce a high-density brush shaped carbon nanostructure useful in the production of CNT assembly, such as rope-shaped CNTs, and provide a catalyst body for production of brush-shaped carbon nanostructure that enables the production. The catalyst body for production of brush-shaped carbon nanostructure is one comprising a substrate (), an aggregation suppressive layer () superimposed on a surface thereof and a catalyst layer superimposed on the aggregation suppressive layer (). The catalyst layer is a catalyst particle layer () consisting of metallic catalyst particles () composed mainly of a catalytic metal. The metallic catalyst particles () have an average particle diameter, D, satisfying the relationship 0.5 nm&#x2266;D&#x2266;80 nm, and individual particles of the metallic catalyst particles () have a diameter, d, falling within the range of the above average particle diameter (D). Further, there are disclosed a process for producing the catalyst body, a brush-shaped carbon nanostructure and a process for producing the same.

Catalyst body for production of brush-shaped carbon nanostructure

Developed is high-efficiency synthesis method and apparatus capable of promoting the initial growth of carbon nanostructure by eliminating the initial fluctuation time and rising time in raw gas flow quantity.-A high-efficiency synthesis method of carbon nanostructure according to the present invention is a high-efficiency synthesis method of carbon nanostructure, the method comprising: bringing raw material gas and a catalyst into contact with each other under reactive conditions so as to produce a carbon nanostructure, wherein: the initiation of contact of the raw material gas with the catalyst is carried out instantaneously. Reaction conditions such as temperature and raw material gas concentration are set so as to meet those for catalyst growth, and under the reaction conditions, the initiation of contact of raw material gas G with catalyst 6 is carried out instantaneously. Consequently, the initial growth of carbon nanostructure is positively carried out, and the height growth and thickness growth thereof can be effected in high efficiency. Further, high-density growth and short-time high-speed growth can be realized. The catalyst includes any forms of catalyst such as catalyst substrate, catalyst structure, catalyst powders and catalyst pellet. It is especially preferred to employ a system wherein the feed and interruption of the raw material gas G are intermittently controlled by means of an electromagnetic three-way valve

Apparatus for high-efficiency synthesis of carbon nanostructure

An aggregate of carbon-based fine structures in which a plurality of carbon-based fine structures are collected, wherein respective carbon-based fine structures are oriented in the same direction. The above aggregate of carbon-based fine structures is an aggregate of a plurality of carbon-based fine structures in a state they are pulled by one another with strong interaction, and has such a length that allows the improvement of the handleability and workability thereof.

It is intended to highly efficiently produce a high-density brush-shaped carbon nanostructure useful in the production of CNT assembly, such as rope-shaped CNTs, and provide a catalyst body for production of brush-shaped carbon nanostructure that enables the production. The catalyst body for production of brush-shaped carbon nanostructure is one comprising a substrate (), an aggregation suppressive layer () superimposed on a surface thereof and a catalyst layer superimposed on the aggregation suppressive layer (). The catalyst layer is a catalyst particle layer () consisting of metallic catalyst particles () composed mainly of a catalytic metal. The metallic catalyst particles () have an average particle diameter, D, satisfying the relationship 0.5 nm&#x2266;D&#x2266;80 nm, and individual particles of the metallic catalyst particles () have a diameter, d, falling within the range of the above average particle diameter (D). Further, there are disclosed a process for producing the catalyst body, a brush-shaped carbon nanostructure and a process for producing the same.

Process for producing catalyst body for production of brush-shaped carbon nanostructure

A method for synthesizing carbon nanocoils with high efficiency, by determining the structure of carbon nuclei that have been attached to the ends of carbon nanocoils and thus specifying a true catalyst for synthesizing carbon nanocoils is implemented. The catalyst for synthesizing carbon nanocoils according to the present invention is a carbide catalyst that contains at least elements (a transition metal element, In, C) or (a transition metal element, Sn, C), and in particular, it is preferable for the transition metal element to be Fe, Co or Ni. In addition to this carbide catalyst, a metal catalyst of (Fe, Al, Sn) and (Fe, Cr, Sn) are effective. From among these, catalysts such as FeInC, FeInCSnw and FeSnC are particularly preferable. The wire diameter and the coil diameter can be controlled by using a catalyst where any of these catalysts is carried by a porous carrier.

Catalyst for synthesizing carbon nanocoils, synthesizing method of the same, synthesizing method of carbon nanocoils, and carbon nanocoils

Developed is high-efficiency synthesis method and apparatus capable of promoting the initial growth of carbon nanostructure by eliminating the initial fluctuation time and rising time in raw gas flow quantity. A high-efficiency synthesis method of carbon nanostructure according to the present invention is a high-efficiency synthesis method of carbon nanostructure, the method comprising: bringing raw material gas and a catalyst into contact with each other under reactive conditions so as to produce a carbon nanostructure, wherein: the initiation of contact of the raw material gas with the catalyst is carried out instantaneously. Reaction conditions such as temperature and raw material gas concentration are set so as to meet those for catalyst growth, and under the reaction conditions, the initiation of contact of raw material gas G with catalystis carried out instantaneously. Consequently, the initial growth of carbon nanostructure is positively carried out, and the height growth and thickness growth thereof can be effected in high efficiency. Further, high-density growth and short-time high-speed growth can be realized. The catalyst includes any forms of catalyst such as catalyst substrate, catalyst structure, catalyst powders and catalyst pellet. It is especially preferred to employ a system wherein the feed and interruption of the raw material gas G are intermittently controlled by means of an electromagnetic three-way valve

Method for high-efficiency synthesis of carbon nanostructure

A material gas and a catalyst are introduced through a material supplying tube path and a catalyst supplying tube path together with a carrier gas into a reactor equipped on its outer periphery with a heat applicator for thermally decomposing the material gas. The reactor has a convention regulator fitted to the discharge end of the catalyst supplying tube path. The convection regulator covers an edge side of the reactor to regulate gas flow in the reactor so that the flow does not reach the edge side. Due to this, a convection state can be efficiently produced in a reaction region. Consequently, it becomes possible to prevent contamination defect caused by accumulation/adherence of concretion of catalyst, which was generated by aggregation of cooled catalyst in the low-temperature region of the reactor and a decomposition product of the material gas. Thus the efficiency of carbon nanostructure production can be improved.

Production method and production device for carbon nano structure

A noise measuring unitmeasures a noise power based on an output from a digitizerand the amplification factor of a limiter amplifierwhen an output from a device under testis supplied for the digitizerthrough the limiter amplifier. Since the output from the device under testis supplied through the limiter amplifier, the noise component is sufficiently amplified, the carrier component saturates, and thus, the noise measuring uniteasily measures the noise power. At this time, the output frequency of the device under testis not multiplied, and thus, it is not necessary to use a down converter or a spectrum analyzer, the C/N ratio can be measured at a high speed or with a simple constitution.

Apparatus and method for measuring noise, and recording medium

A developing solution comprising a specific amount of a quaternary ammonium hydroxide represented by the general formula [(R.sup.1).sub.3 N--R].sup.+ .multidot.OH.sup.- (R indicates an alkyl group having 1 to 3 carbon atoms or a hydroxy-substituted alkyl group having 1 to 3 carbon atoms, and R.sup.1 indicates an alkyl group having 1 to 3 carbon atoms) and, if necessary, a quaternary ammonium hydrogen carbonate represented by the general formula [(R.sup.1).sub.3 N--R].sup.+ .multidot.HCO.sub.3.sup.- (R and R.sup.1 are the same as the above) and having a pH in the range of 9 to 13, and a process for producing printed circuit boards using an organic alkali solution, are provided. The developing solution needs no defoaming agent because it causes little foaming. Printed circuit boards produced by using the developing solution have excellent finished accuracy. Therefore, fine circuits of printed circuit networks can be produced with stability.

Developing solution for producing printed circuit boards and a process

Disclosed are an inhibitor parcel comprising (a) a composition comprising an unsaturated fatty acid compound as its main ingredient and (b) a permeable diffusing-parcelling material prepared by laminating and bonding an oxygen-permeable resin layer onto one side of a base sheet made of a fibrous material and an adhesive or onto one adhesive-coating side of a base sheet made of a fibrous material, then laminating and bonding thereonto an oxygen-permeable resin layer and laminating and bonding a porous film of low softening point resin or a low softening point unwoven fabric onto the other side of the base sheet, said permeable diffusing-parcelling material (b) having an oxygen permeability of 10.sup.4 to 10.sup.6 ml/m.sup.2.Atm.Day and a (water vapor permeability/oxygen permeability) ratio of 0.02 H.sub.2 O mg.Atm/O.sub.2 ml! or above at 25.degree. C. at a relative humidity of 50% and said composition (a) being parcelled by said permeable diffusing-parcelling material (b) and an inhibitor parcel for use in electronic devices and electronic parts which comprises said inhibitor parcel and a method for preserving electronic devices and electronic parts using said inhibitor parcel.

Inhibitor parcel and method for preserving electronic devices or

Disclosed are an inhibitor parcel including (a) a composition including an unsaturated fatty acid compound as its main ingredient and (b) a permeable diffusing-parcelling material prepared by laminating and bonding an oxygen-permeable resin layer onto one side of a base sheet made of a fibrous material and an adhesive or onto one adhesive-coating side of a base sheet made of a fibrous material, then laminating and bonding thereonto an oxygen-permeable resin layer and laminating and bonding a porous film of low softening point resin or a low softening point nonwoven fabric onto the other side of the base sheet, the permeable diffusing-parcelling material (b) having an oxygen permeability of 10.sup.4 to 10.sup.6 ml/m.sup.2. Atm. Day and a (water vapor permeability/oxygen permeability) ratio of 0.02 [H.sub.2 O mg.Atm/O.sub.2 ml] or above at 25.degree. C. at a relative humidity of 50% and the composition (a) being parcelled by the permeable diffusing-parcelling material (b) and an inhibitor parcel for use in electronic devices and electronic parts which includes the inhibitor parcel and a method for preserving electronic devices and electronic parts using the inhibitor parcel.

Growing community of inventors

Tokyo, Japan

Takeshi Nagasaka