Search results for: Masato Kurihara

Items from 1 to 20 out of 44 results

article

Correction to: Stickelberger ideals and Fitting ideals of class groups for abelian number fields

Masato Kurihara, Takashi Miura

Mathematische Annalen > 2019 > 374 > 3-4 > 2083-2088

In the proofs of Theorems 3.5, 3.6 in [3], which give equality of the Fitting ideal of the class group of a CM-field and the Stickelberger ideal, we used Lemma 6.3 in [2], which bounds the index of the Fitting ideal in terms of the class number.

article

Interpretation of the Role of Composition on the Inclusion Efficiency of Monovalent Cations into Cobalt Hexacyanoferrate

Nan Zhang, Tohru Kawamoto, Yong Jiang, Akira Takahashi, more

Chemistry – A European Journal > 25 > 23 > 5950 - 5958

Cobalt hexacyanoferrate of various compositions was prepared in flow mode and the role of the vacancy on the structure, thermogravimetric (TG) properties, and the adsorption efficiency was studied. The material, Na_yCo[Fe(CN)₆]_1−x⋅z H₂O, with a minimum vacancy of x=0.014 to the highest x=0.47, was obtained. The TG‐differential scanning calorimetry (DSC) profile showed a distinct influence of the vacancy...

article

Polymer surfactant-assisted tunable nanostructures of amorphous IrOx thin films for efficient electrocatalytic water oxidation

Debraj Chandra, Tsubasa Sato, Ryouchi Takeuchi, Dong Li, more

Catalysis Today > 2017 > 290 > C > 51-58

Transparent IrO_x catalyst films for water oxidation were fabricated on fluorine-doped tin oxide electrodes from Ir precursor complex solutions containing Pluronic P123, Brij 58 or Pluronic F127 as surfactant structure directing agents (SDAs). The thin layers composed of highly dispersed and very small nanoparticles of ca. ≤2nm were formed for IrO_x films derived by Pluronic P123 and Brij 58, both of...

article

Dual‐Functional Surfactant‐Templated Strategy for Synthesis of an In Situ N₂‐Intercalated Mesoporous WO₃ Photoanode for Efficient Visible‐Light‐Driven Water Oxidation

Dong Li, Debraj Chandra, Ryouchi Takeuchi, Takanari Togashi, more

Chemistry – A European Journal > 23 > 27 > 6596 - 6604

N₂‐Intercalated crystalline mesoporous tungsten trioxide (WO₃) was synthesized by a thermal decomposition technique with dodecylamine (DDA) as a surfactant template with a dual role as an N‐atom source for N₂ intercalation, alongside its conventional structure‐directing role (by micelle formation) to induce a mesoporous structure. N₂ physisorption analysis showed that the specific surface area (57...

article

Grain‐Boundary‐Free Super‐Proton Conduction of a Solution‐Processed Prussian‐Blue Nanoparticle Film

Kenta Ono, Manabu Ishizaki, Katsuhiko Kanaizuka, Takanari Togashi, more

Angewandte Chemie International Edition > 56 > 20 > 5531 - 5535

A porous crystal family has been explored as alternatives of Nafion films exhibiting super‐proton conductivities of ≥10⁻² S cm⁻¹. Here, the proton‐conduction natures of a solution‐processed film of nanoparticles (NPs) have been studied and compared to those of a Nafion film. A mono‐particle film of Prussian‐blue NPs is spontaneously formed on a self‐assembled monolayer substrate by a one‐step solution...

article

Grain‐Boundary‐Free Super‐Proton Conduction of a Solution‐Processed Prussian‐Blue Nanoparticle Film

Kenta Ono, Manabu Ishizaki, Katsuhiko Kanaizuka, Takanari Togashi, more

Angewandte Chemie > 129 > 20 > 5623 - 5627

article

Cu‐rich CuInSe₂ solar cells with a Cu‐poor surface

Yasuhiro Aida, Valérie Depredurand, Jes K Larsen, Hitoshi Arai, more

Progress in Photovoltaics: Research and Applications > 23 > 6 > 754 - 764

We present the effects of an In‐Se surface treatment of Cu‐rich ([Cu]/[In] > 1) CuInSe₂ absorbers in order to utilize the superior transport properties of Cu‐rich absorbers for high‐efficiency solar cells. A Cu‐poor surface was successfully formed on a Cu‐rich absorber by co‐evaporation of indium and selenium under appropriate conditions. The aim is to suppress the interface recombination, which...

article

Column study on electrochemical separation of cesium ions from wastewater using copper hexacyanoferrate film

Rongzhi Chen, Miyuki Asai, Chikako Fukushima, Manabu Ishizaki, more

Journal of Radioanalytical and Nuclear Chemistry > 2015 > 303 > 2 > 1491-1495

Nanoparticle film of copper hexacyanoferrate (CuHCF^III) was developed and coated on the rolled sheet electrodes for column cesium separation from wastewater. Results indicated well balance of Cs adsorption and desorption can be achieved switching the potentials between anodes and cathodes. XPS and isotherm studies indicated the electrochemical oxidation–reduction of Fe(II/III) on the monolayer of...

article

Cesium adsorption ability and stability of metal hexacyanoferrates irradiated with gamma rays

Makoto Arisaka, Masayuki Watanabe, Manabu Ishizaki, Masato Kurihara, more

Journal of Radioanalytical and Nuclear Chemistry > 2015 > 303 > 2 > 1543-1547

The cesium (Cs) adsorption ability and stability of metal hexacyanoferrates (MHCFs: M = Fe, Cu, Ni) in HNO₃ solutions were investigated as a function of the absorbed dose resulting from irradiation with gamma rays.

article

Growth of Pt Subnano Clusters on Limited Surface Areas of Prussian Blue Nanoparticles

Manabu Ishizaki, Shoko Tsuruta, Katsuhiko Kanaizuka, Masatomi Sakamoto, more

Journal of Inorganic and Organometallic Polymers and Materials > 2013 > 23 > 1 > 216-222

We synthesized insoluble Prussian blue nanoparticles (PB NPs) and water-soluble PB NPs ([Fe(CN)₆]⁴⁻-modified PB NPs) as synthetic fields and carriers of Pt subnano clusters. Pt²⁺ can attach on their surface Fe–CN sites. The amount of the attached Pt²⁺ on the insoluble and water-soluble PB NP surfaces was saturated to reach Pt/Fe = 15 and 40 mol%, respectively, based on the total metal ions of PB....

article

Selective removal of cesium ions from wastewater using copper hexacyanoferrate nanofilms in an electrochemical system

Rongzhi Chen, Hisashi Tanaka, Tohru Kawamoto, Miyuki Asai, more

Electrochimica Acta > 2013 > 87 > Complete > 119-125

A novel electrochemical adsorption system using a nanoparticle film of copper (II) hexacyanoferrate (III) was proposed for selectively removing cesium from wastewater. This system can be used for cesium separation without extra chemical reagents or any filtration treatment. Cesium uptake and elution can be simply controlled by switching the applied potentials between anodes and cathodes. Data from...

article

Organic integrated circuits using room-temperature sintered silver nanoparticles as printed electrodes

Kenjiro Fukuda, Tomohito Sekine, Yu Kobayashi, Yasunori Takeda, more

Organic Electronics > 2012 > 13 > 12 > 3296-3301

Organic integrated circuits based on organic thin-film transistor (TFT) devices are fabricated with solution-based electrodes by using dense inks of silver nanoparticles, which can be sintered at room-temperature. The TFT devices fabricated at a sintering temperature of 30°C exhibit good electrical characteristics. There is a strong relation between the sintering temperature of silver nanoparticle...

article

Preparation of a film of copper hexacyanoferrate nanoparticles for electrochemical removal of cesium from radioactive wastewater

Rongzhi Chen, Hisashi Tanaka, Tohru Kawamoto, Miyuki Asai, more

Electrochemistry Communications > 2012 > 25 > Complete > 23-25

We first synthesized water-dispersed nanoparticle copper hexacyanoferrate (CuHCF) ink and then coated its nanoparticles on electrodes to electrochemically remove cesium from wastewater. Cesium uptake and elution can be controlled by switching the potentials between anodes and cathodes. Effective cesium removal can be adopted in a large pH range from 0.2 to 8.9, and in the presence of several diverse...

article

Preparation of new heteronuclear (NH4)2XLa1−XSrX[Fe(CN)6]·nH2O complex for Sr-substituted perovskite-type La1−XSrXFeO3−α

Hiromichi Aono, Takaaki Nishida, Tomoya Kan, Yuu Jin-oka, more

Materials Letters > 2012 > 83 > Complete > 151-153

A new heteronuclear (NH ₄ ) ₂ Sr[Fe ^II (CN) ₆ ] complex having a tetragonal phase was synthesized from Sr(NO ₃ ) ₂ and (NH ₄ ) ₄ [Fe ^II (CN) ₆ ]·nH ₂ O. A single phase of the heteronuclear (NH ₄ ) _2X La _1−X Sr _X [Fe(CN) ₆ ]•nH ₂ O complex was synthesized by the coprecipitation...

article

Stable organic thin-film transistors using full solution-processing and low-temperature sintering silver nanoparticle inks

Kenjiro Fukuda, Tomohito Sekine, Yu Kobayashi, Daisuke Kumaki, more

Organic Electronics > 2012 > 13 > 9 > 1660-1664

We have fabricated electronically stable organic thin-film transistor (TFT) devices that are fully solution-processed and adopt printed electrodes using silver nanoparticles dispersed in organic solvents, whose sintering temperatures are 100°C or less. The bottom-contact organic TFT devices showed good electrical characteristics, and exhibited threshold voltage shifts less than 2.0V after applying...

article

Preparation of new heteronuclear (NH4)RE[FeII(CN)6]·nH2O complexes (RE=La, Ce, Pr, Nd, Sm, Gd, Dy, Y, Er, Lu) and their low-temperature decomposition for perovskite-type oxide

Hiromichi Aono, Takaaki Nishida, Masato Kurihara, Masatomi Sakamoto, more

Ceramics International > 2012 > 38 > 3 > 2333-2338

New heteronuclear (NH ₄ )RE ^III [Fe ^II (CN) ₆ ]·nH ₂ O complexes (RE=La, Ce, Pr, Nd, Sm, Gd, Dy, Y, Er, Lu) were synthesized and their thermal decomposition products were investigated. The crystal structure of (NH ₄ )RE[Fe ^II (CN) ₆ ]·nH ₂ O would be a hexagonal unit cell (space group: P6 ₃ /m), which was the same as that...

article

Stickelberger ideals and Fitting ideals of class groups for abelian number fields

Masato Kurihara, Takashi Miura

Mathematische Annalen > 2011 > 350 > 3 > 549-575

In this paper, we determine completely the initial Fitting ideal of the minus part of the ideal class group of an abelian number field over Q up to the 2-component. This answers an open question of Mazur and Wiles (Invent Math 76:179–330, 1984) up to the 2-component, and proves Conjecture 0.1 in Kurihara (J Reine Angew Math 561:39–86, 2003). We also study Brumer’s conjecture and prove a stronger version...

article

Decreasing the initial irreversible capacity loss of graphite negative electrode by alkali-addition

Atsushi Sano, Masato Kurihara, Kazuya Ogawa, Tsuyoshi Iijima, more

Journal of Power Sources > 2009 > 192 > 2 > 703-707

The effect of alkali function group contained in electrode binder was investigated. Carboxy methyl cellulose (CMC) improved the initial irreversible capacity loss in graphite negative electrode. Lithium acetate also improved the initial cycle efficiency. On the other hand, ethyl cellulose (EC) and hydroxyl propyl methyl cellulose (HPMC), which do not have a carboxylic group, did not decrease the reductive...

article

Extraordinary dissolution of coordination polymer, La[Fe(CN)6]·5H2O, in ethylene glycol/water mixed solvent and structural determination of dissolved species

Aya Nakajima, Shun Itoh, Masato Kurihara, Masatomi Sakamoto, more

Inorganic Chemistry Communications > 2008 > 11 > 3 > 323-325

Heteronuclear coordination polymer, La[Fe(CN) ₆ ]·5H ₂ O, poorly soluble in water and almost insoluble in usual organic solvents due to its sturdy three-dimensional infinite network structure constructed by Fe–CN–La linkages was found to be tremendously dissolved in the mixed solvent of ethylene glycol (EG):water=7:3 to give a highly viscous solution as a promising fluid precursor...

article

Stickelberger elements, Fitting ideals of class groups of CM-fields, and dualisation

Cornelius Greither, Masato Kurihara

Mathematische Zeitschrift > 2008 > 260 > 4 > 905-930

In this paper, we systematically construct abelian extensions of CM-fields over a totally real field whose Stickelberger elements are not in the Fitting ideals of the class groups. Our evidence indicates that Pontryagin duals of class groups behave better than the class groups themselves. We also explore the behaviour of Fitting ideals under projective limits and dualisation in a somewhat broader...

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Keywords

BIFERROCENE (2)
CESIUM (2)
COPPER HEXACYANOFERRATE (2)
ELECTROCHEMICAL SEPARATION (2)
ELECTRODEPOSITION (2)
GOLD CLUSTER (2)
HETRONUCLEAR COMPLEX (2)
ORGANIC THIN-FILM TRANSISTOR (2)
PEROVSKITE-TYPE OXIDE (2)
PRUSSIAN BLUE (2)
RADIOACTIVE CESIUM (2)
SILVER NANOPARTICLE (2)
SURFACE PLASMON (2)
THERMAL DECOMPOSITION (2)
Π-CONJUGATION (1)
(NH4)2SR[FEII(CN)6] (1)
(NH4)2XLA1−XSRX[FE(CN)6]·NH2O (1)
(NH4)RE[FEII(CN)6]·NH2O (1)
11R18 (1)
11R29 (1)
ABELIAN EXTENSION (1)
ACTIVE SURFACE (1)
ADSORPTION ABILITY (1)
AES (1)
ANODE MATERIAL (1)
AZO-FERROCENE (1)
CARBOXY METHYL CELLULOSE (1)
CARBOXYLIC GROUP (1)
CHEMICAL SYNTHESIS (1)
COBALT HEXACYANOFERRATE (COHCF) (1)
COLUMN REMOVAL (1)
COORDINATION COMPOUND (1)
CRYSTAL STRUCTURE (1)
CUINSE2 (1)
CU‐RICH (1)
CYCLOBUTADIENECOBALT COMPLEX (1)
DISCRETE VALUATION RING (1)
DOPING (1)
ELECTROCATALYSIS (1)
ELECTROCHEMICAL ADSORPTION (1)
ELECTROCHEMICAL PROPERTY (1)
ELECTROCHEMISTRY (1)
ELECTRONIC INTERACTION (1)
ETHYLENE GLYCOL COMPLEX OF LANTHANUM(III) (1)
FERROCENE (1)
FITTING IDEAL (1)
FULL SOLUTION-PROCESSING (1)
GAMMA-RAY IRRADIATION (1)
GRAIN-BOUNDARY FREE PROTON CONDUCTION (1)
HYDROXYL PROPYL METHYL CELLULOSE (1)
INERTIA GROUP (1)
INTEGRATED CIRCUITS (1)
INTERCALATIONS (1)
IONIC SIZE (1)
IRIDIUM OXIDE (1)
IRREVERSIBLE CAPACITY (1)
IVT (1)
KORNGRENZENFREIE PROTONENLEITUNG (1)
LANTHANUM(III) HEXACYANOFERRATE(III) (1)
LITHIUM ION BATTERY (1)
LOW-TEMPERATURE SINTERING (1)
MAIN CONJECTURE (1)
MATHEMATICS SUBJECT CLASSIFICATION (1991): 11R23 (1)
MESOPOROUS MATERIALS (1)
METAL HEXACYANOFERRATE (1)
METAL HEXACYANOFERRATE COMPLEX (1)
METALL-ORGANISCHE GERÜSTVERBINDUNGEN (1)
METALLACYCLE (1)
METALLACYCLING POLYMERIZATION (1)
METAL–ORGANIC FRAMEWORKS (1)
NANOPARTICLE FILM (1)
NANOPARTICLES (1)
NANOPARTICLES FILM (1)
NANOPARTIKEL (1)
NANOSTRUCTURE ENGINEERING (1)
OLIGOMER (1)
PERCOLATION VIA VACANCY (1)
PL (1)
PREUSSISCHBLAU (1)
PRINTED ELECTRONICS (1)
PT SUBNANO CLUSTER (1)
RADIOACTIVE WASTE (1)
REDOX (1)
REDOX POLYMER (1)
REDOX PROPERTIES (1)
ROOM-TEMPERATURE SINTERING (1)
RUTHENIUM (1)
SEI (1)
SELECTIVE REMOVAL (1)
SOLAR CELLS (1)
SOLUBILITY (1)
STABILITY (1)
STATES OF WATER (1)
SUPER-PROTON CONDUCTIVITY (1)
SUPERPROTONENLEITFÄHIGKEIT (1)
SURFACE (1)
SURFACTANT TEMPLATE (1)
SWITCHABLE OPERATION (1)
TEMPLATE SYNTHESIS (1)
THERMAL ANALYSIS (1)
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Elsevier (15)
ACS (13)
Springer (10)
Wiley (5)
DML (1)

Journal

Inorganic Chemistry (8)
Journal of the American Chemical Society (5)
Chemistry – A European Journal (2)
Journal of Electroanalytical Chemistry (2)
Journal of Inorganic and Organometallic Polymers and Materials (2)
Journal of Power Sources (2)
Journal of Radioanalytical and Nuclear Chemistry (2)
Mathematische Annalen (2)
Organic Electronics (2)
Acta Arithmetica (1)
Angewandte Chemie (1)
Angewandte Chemie International Edition (1)
Catalysis Today (1)
Ceramics International (1)
Electrochemistry Communications (1)
Electrochimica Acta (1)
Inorganic Chemistry Communications (1)
Inventiones mathematicae (1)
Journal of Alloys and Compounds (1)
Journal of Materials Science (1)
Journal of Organometallic Chemistry (1)
Journal of the European Mathematical Society (1)
Materials Letters (1)
Mathematische Zeitschrift (1)
Progress in Photovoltaics: Research and Applications (1)
Synthetic Metals (1)
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INFONA - science communication portal

Search results for: Masato Kurihara

Correction to: Stickelberger ideals and Fitting ideals of class groups for abelian number fields

Interpretation of the Role of Composition on the Inclusion Efficiency of Monovalent Cations into Cobalt Hexacyanoferrate

Polymer surfactant-assisted tunable nanostructures of amorphous IrOx thin films for efficient electrocatalytic water oxidation

Dual‐Functional Surfactant‐Templated Strategy for Synthesis of an In Situ N₂‐Intercalated Mesoporous WO₃ Photoanode for Efficient Visible‐Light‐Driven Water Oxidation

Grain‐Boundary‐Free Super‐Proton Conduction of a Solution‐Processed Prussian‐Blue Nanoparticle Film

Grain‐Boundary‐Free Super‐Proton Conduction of a Solution‐Processed Prussian‐Blue Nanoparticle Film

Cu‐rich CuInSe₂ solar cells with a Cu‐poor surface

Column study on electrochemical separation of cesium ions from wastewater using copper hexacyanoferrate film

Cesium adsorption ability and stability of metal hexacyanoferrates irradiated with gamma rays

Growth of Pt Subnano Clusters on Limited Surface Areas of Prussian Blue Nanoparticles

Selective removal of cesium ions from wastewater using copper hexacyanoferrate nanofilms in an electrochemical system

Organic integrated circuits using room-temperature sintered silver nanoparticles as printed electrodes

Preparation of a film of copper hexacyanoferrate nanoparticles for electrochemical removal of cesium from radioactive wastewater

Preparation of new heteronuclear (NH4)2XLa1−XSrX[Fe(CN)6]·nH2O complex for Sr-substituted perovskite-type La1−XSrXFeO3−α

Stable organic thin-film transistors using full solution-processing and low-temperature sintering silver nanoparticle inks

Preparation of new heteronuclear (NH4)RE[FeII(CN)6]·nH2O complexes (RE=La, Ce, Pr, Nd, Sm, Gd, Dy, Y, Er, Lu) and their low-temperature decomposition for perovskite-type oxide

Stickelberger ideals and Fitting ideals of class groups for abelian number fields

Decreasing the initial irreversible capacity loss of graphite negative electrode by alkali-addition

Extraordinary dissolution of coordination polymer, La[Fe(CN)6]·5H2O, in ethylene glycol/water mixed solvent and structural determination of dissolved species

Stickelberger elements, Fitting ideals of class groups of CM-fields, and dualisation

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