National Institute for Materials Science

Ishihara Sangyo Kaisha, Ltd.

Samsung Electronics Co., Ltd.

National Institute for Research in Inorganic Materials

Other

Murata Manufacturing Co., Ltd.

Central Japan Railway Company

Independent Administrative Institution National Institute for Materials Science

National Institute of Materials Science

Japan as Represented by the Head of National Institute for Research in Inorganic Materials, Science & Technology Agency

Japan as Represented by the Head of National Institute for Research in Organic Materials Science & Technology Agency

Takayoshi Sasaki

Minoru Osada

Mamoru Watanabe

Yasuo Ebina

Chan Kwak

Yuichi Michiue

Masaki Iida

Youngjin Cho

Doh Won Jung

Nobuo Iyi

Yoshinori Fujiki

Masaki Inoue

Kunihiko Terase

Atsunari Fujii

Tadashi Ozawa

Hyungjun Kim

Eiichi Ono

Hyeon Cheol Park

Akira Fujishima

Changsoo Lee

Kazunori Takada

Daejin Yang

Yoon Chul Son

Takafumi Okamoto

Giyoung Jo

Tetsuya Shichi

Christopher Cordonier

Yasuhiro Katsumata

Kenichi Katsumata

Takefumi Mitsuhashi

Takafumi Numata

Hirofumi Taniguchi

Yusuke Uesusuki

Yu Komatsu

Masayuki Tsutsumi

Ikuo Yanase

Takugo Ootaki

Yoshimi Ohba

Shikou Minohara

Yoon Chui Son

Yoshito Onoda

Tadashi Ohachi

Kazuko Saruwatari

Dohwon Jung

Kazuaki Matsuba

Takaaki Taniguchi

Kousyo Akatsuka

Narumi Ohta

Lianqi Zhang

Provided are a dielectric material, a device including the dielectric material, and a method of preparing the dielectric material, in which the dielectric material may include: a layered perovskite compound, wherein the layered perovskite compound may include at least one selected from a Dion-Jacobson phase, an Aurivillius phase, and a Ruddlesden-Popper phase, a temperature coefficient of capacitance (TCC) of a capacitance at 200° C. with respect to a capacitance at 40° C. may be in a range of about −15 percent (%) to about 15%, and a permittivity of the dielectric material may be 200 or greater in a range of about 1 kilohertz (kHz) to about 1 megahertz (MHz).

Dielectric material, device comprising dielectric material, and method of preparing dielectric material

A ceramic electronic component includes a pair of electrodes facing each other and a dielectric layer disposed between the pair of electrodes and including a plurality of ceramic nanosheets, where the plurality of ceramic nanosheets has a multimodal lateral size distribution expressed by at least two separated peaks, a method of manufacturing the same, and an electronic device including the ceramic electronic component.

Ceramic electronic component including ceramic nanosheets having multimodal lateral size distribution and method of manufacturing the same and electronic device

A method of manufacturing a ceramic electronic component includes forming a dielectric layer including a plurality of ceramic nanosheets on a first electrode, treating the dielectric layer with an acid, and forming a second electrode on the dielectric layer, a ceramic electronic component, and an electronic device.

Ceramic electronic component and method of manufacturing the same and electronic device

Provided is a water-swelling layered double hydroxide characterized by having an organic sulfonic acid anion (A) between layers, and by being represented by the below mentioned general formula (1): QR(OH)(A)(X).mHO . . . (1). Here, Q is a divalent metal, R is a trivalent metal, Ais an organic sulfonic acid anion, m is a real number greater than 0, and z is in the range of 1.8&#x2266;z&#x2266;4.2. Xis the n-valent anion remaining without Asubstitution, n is 1 or 2, y represents the remaining portion of X, and 0&#x2266;y&#x3c;0.4.

Water-swelling layered double hydroxide, method for producing same, gel or sol substance, double hydroxide nanosheet, and method for producing same

At least two types of dielectric materials such as oxide nanosheets having a layered perovskite structure that differ from each other are laminated, and the nanosheets are bonded to each other via an ionic material, thereby producing a superlattice structure-having ferroelectric thin film. Having the layered structure, the film can exhibit ferroelectricity as a whole, though not using a ferroelectric material therein. Accordingly, there is provided a ferroelectric film based on a novel principle, which is favorable for ferroelectric memories and others and which is free from a size effect even though extremely thinned.

Ferroelectric thin film having superlattice structure, manufacturing method thereof, ferroelectric element, and manufacturing method thereof

A thin film capacitor includes a substrate and a dielectric thin film element formed on the substrate. The substrate can include an Si plate, an SiOfilm on the Si plate, and a Ti film formed on the SiOfilm. The dielectric thin film element includes a lower electrode, a dielectric thin film on the lower electrode, and an upper electrode formed on the dielectric thin film. The dielectric thin film is a thin film formed of a nanosheet, and a void portion of the dielectric thin film is filled with a p-type conductive organic polymer. TiO, CaNbOor the like, is used as a dielectric material to form a major component of the nanosheet. As the p-type conductive organic polymer, polypyrrole, polyaniline, polyethylene dioxythiophene or the like, is suitable.

Dielectric thin film, dielectric thin film element and thin film capacitor

Disclosed is an organic dispersion comprising a flaky titanium oxide particle having a high crystallinity and high light permeability contained in an organic solvent. The dispersion can be prepared by a method comprising preparing an aqueous dispersion of a flaky titanium oxide particle containing an organic cation, centrifuging the aqueous dispersion to produce a precipitate, and adding the precipitate to an organic solvent, or a method comprising lyophilizing the aqueous dispersion to produce a lyophilized material and mixing the lyophilized material to an organic solvent. When the organic dispersion is used, it becomes possible to form a film comprising a monolayer of a titanium oxide nanosheet densely arranged therein by such a simple manner that the dispersion is coated on a base material and drying the dispersion. The film thus produced has a photocatalytic activity and a super-hydrophilic property.

Organic solvent dispersion containing flaky titanium oxide, method for production of the dispersion, titanium oxide film using the dispersion, and method for production of the titanium oxide film

A high dielectric nanosheet laminate is produced by laminating nanosheets, each of which has a thickness of 10 nm or less and is formed of an oxide that has a perovskite structure wherein at least four NbOoctahedrons, TaOoctahedrons or TiOoctahedrons are included in a unit lattice. Consequently, the high dielectric nanosheet laminate is capable of achieving a high dielectric constant and a satisfactory insulation property, which are preferable for high dielectric nanosheet multilayer capacitors or the like, at the same time even if formed very thin.

High dielectric nanosheet laminate, high dielectric element and method for producing the same

A luminescent nanosheet has perovskite octahedral crystal units combined together in a planar configuration. The octahedral crystal units each have a multistacked crystal sheet structure. The octahedral crystal units are multistacked over at least 3 high in a direction vertical to a sheet plane, and an element providing a luminescence center is solid-solubilized between the multistacked octahedral crystal units.

Luminescent nanosheets

Disclosed is a method for forming a photocatalyst thin film, which is characterized in that a photocatalyst thin film containing a niobium-alkali metal complex oxide is formed by forming and then firing a layer containing a niobia nanosheet on the surface of a base containing an alkali metal.

Photocatalytic film, method for forming photocatalytic film and photocatalytic film coated product

To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.

Methods for producing a thin film consisting of nanosheet monolayer film(s) by spin coat methods, and hyperhydrophilized materials, substrates for an oxide thin film and dielectric materials obtained therefrom

A luminescent nanosheet has perovskite octahedral crystals combined together in a planar configuration, and the octahedral crystals each have a multistacked crystal sheet structure wherein the octahedral crystals are multistacked over at least 3 folds in the direction vertical to a sheet plane, and an element providing a luminescence center is solid-solubilized between the multistacked octahedral crystals.

Luminescent nanosheets, and fluorescent illuminators, solar cells and color displays utilizing the same as well as nanosheet paints

The invention has for its object to provide a preparation method for preparing an anion-exchangeable LDH by decarbonation of a carbonate ion type LDH, which makes sure de carbonation is implemented with safety in a continuous manner while crystal shape, crystal structure and crystallinity are kept intact. The invention provides a preparation method for preparing an anion-exchangeable, layered double hydroxide wherein a carbonate ion type layered double hydroxide (LDH) having a composition represented by a general formula: QR(OH)(CO)(X).nHO where x is indicative of a numeral range of 1.8&#x2266;x&#x2266;4.2; z is indicative of 2(x+1); y is indicative of a minimum value of at least 0 that increases to less than 1 when anions (X) remain or a part of anions is introduced; Q is a divalent metal ion; R is a trivalent metal ion; and n is 2&#xb1;2 is used as a starting material, and y in said general formula increases to a maximum of 1 by substitution of a minus monovalent anion (X) at a carbonate ion site thereby implementing substitution, characterized in that the starting material is dispersed in an aqueous solution mixed with a salt containing minus monovalent anions (X) in an amount enough for substitution at the carbonate ion site while said aqueous solution is kept at a pH (hydrogen ion exponent) of greater than 4 to less than 7.

Preparation method for anion-exchangeable, layered double hydroxides

A magnetic artificial superlattice is composed of laminated thin films including two or more kinds of magnetic flaky particles (magnetic titania nanosheets) obtained by exfoliation of a layer titanium oxide in which Ti atoms in the lattice have been substituted with magnetic elements.

Magnetic artificial superlattice and method for producing the same

Growing community of inventors

Ibaraki, Japan

Takayoshi Sasaki