Konica Corporation

Konica Minolta, Inc.

Konica Minolta Medical and Graphic, Inc.

Konica Minolta Business Technologies, Inc.

Kazuyoshi Goan

Mikio Kouyama

Hajime Tadokoro

Naoko Furusawa

Kazuya Tsukada

Takuji Hasegawa

Tetsuo Shima

Masahiro Anno

Mitsutoshi Nakamura

Kouji Sugama

Hisatake Okada

Yasuhiko Takamuki

Shigenori Kouno

Hideki Hoshino

Ito Koga

Haruhiko Sakuma

Makoto Nomiya

Hideki Komatsu

Hidekazu Kawasaki

Hidetoshi Ezure

Masahiro Matsuoka

Kouichi Sugama

Keiko Maeda

Yoichi Fujieda

Kazuhiro Iwasaki

The present invention provides a semiconductor nanoparticle assembly having improved luminous efficiency, heat resistance, and oxidation resistance, and a method for manufacturing the same. The present invention relates to a semiconductor nanoparticle assembly which includes an aggregate having a plurality of coated semiconductor nanoparticles aggregated, said coated semiconductor nanoparticles each containing a semiconductor nanoparticle having a core/shell structure and a translucent coating layer having a thickness of 3 nm or more and 15 nm or less for coating the semiconductor nanoparticle.

Semiconductor nanoparticle assembly and method for manufacturing the same

Provided is a toner for developing an electrostatic image wherein an environment variation difference in a charging ability can be controlled to be small while having sufficient low temperature fixability. The toner includes toner particles that contain at least a binder resin. The binder resin contains a polymer prepared by polymerizing a polymerizable monomer represented by a following general formula (1). In the general formula (1), Rand Reach independently represent a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 2 carbon atoms; and Rrepresents a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms. X represents an oxygen atom or a single bond; Y represents a substituted or unsubstituted alkylene group having 1 to 4 carbon atoms, or a single bond; and Ar represents a substituted or unsubstituted aryl group. 

Toner for developing electrostatic image

The present invention provides a toner for electrostatic image development that suppresses the fluctuation of electrostatic charge amount in accordance with environmental fluctuation and has good color reproducibility (wide color gamut), a producing method of the toner, and an image forming method using the toner for electrostatic image development. The toner for electrostatic image development of the invention includes a toner particle that contains at least a binder resin. The toner particle includes a polymer having a structural unit represented by a following general formula (1) as the binder resin. where Rrepresents a hydrogen atom or substituted or unsubstituted C1-C2 alkyl group, A represents an oxygen atom or divalent linking group, B represents a hydrogen atom, substituted or unsubstituted C1-C4 alkyl group, aldehyde group, carboxy group or hydroxy group, and X represents an oxygen atom, nitrogen atom or sulfur atom.

Toner for electrostatic image development, production method of the toner and image formation method

A toner for electrostatic image development having sufficient low-temperature fixing properties, and excellent heat resistant storage stability and crush resistance is provided. In toner particles containing at least a binder resin, the binder resin contains a polymer having a structural unit represented by a general formula (1), wherein R, R, and Reach independently represent a hydrogen atom, a hydroxyl group, or an alkoxy group, or two adjacent groups of R, R, and Rcombine to form &#x2014;O(CH)O&#x2014;, where i represents an integer of 1 or 2, provided that at least one of R, R, and Ris an alkoxy group, or two adjacent groups combine to form &#x2014;O(CH)O&#x2014;; and Rrepresents a hydrogen atom, a halogen atom, an alkyl group, a hydroxyl group, or an alkoxy group. 

Toner for electrostatic image development

Provided is a toner for developing an electrostatic image. The toner has excellent heat-resistant storage properties and crush resistance while having sufficient low temperature fixability. The toner for developing an electrostatic image includes toner particles that contain at least a binder resin. The binder resin contains a polymer prepared by polymerizing a polymerizable monomer represented by a following general formula (1). In the general formula (1), Rand Reach independently represent an aliphatic hydrocarbon group having 1 to 60 carbon atoms, an aliphatic group wherein some of carbon atoms of the aliphatic hydrocarbon group are substituted with an oxygen atom, or an aromatic hydrocarbon group optionally having the aliphatic hydrocarbon group or the aliphatic group as a substituent; and Rand Reach independently represent a hydrogen atom or an aliphatic hydrocarbon group. 

Disclosed is an image print which has a toner-holding layer on an image-supporting substrate in which the toner-holding layer holds a toner image formed by toner particles, wherein the toner-holding layer is composed of a hydrogel having a water content of 10% by mass or more and not more than 90% by mass.

Image print and image forming method

A toner comprising toner particles, wherein a surface-treated titanate compound is contained on the surface of parent toner particles comprising a resin and a colorant, and the titanate compound having a carbon amount of not less than 0.15% by mass and not more than 0.50% by mass.

Electrophotographic toner

Disclosed are core/shell type semiconductor nanoparticles exhibiting a sufficient emission intensity without causing a blink phenomenon (blinking). The core/shell-type semiconductor nanoparticles have an average particle size of from 2 to 50 nm and comprise an intermediate layer between a core portion and a shell portion, wherein band gap widths of bulk crystals which have the same compositions as those of the core portion, the intermediate portion and the shell portion, respectively, are in the order of:

Core/shell type semiconductor nanoparticle and method for production thereof

The present invention is to provide a nanosized phosphor exhibiting enhanced luminance as a molecular labeling phosphor by controlling an electrostatic charge of an inorganic phosphor. The nanosized phosphor is featured in that at least 90% of total particles have a particle size of 1 to 100 nm and an electrostatic charge of the total particles is in the range of &#x2212;20 &#x3bc;C/g to 5 &#x3bc;C/g.

Nanosized phosphor

Disclosed are a phosphor in which prevention of aging deterioration of luminance and prevention of deterioration of discharging characteristics are compatible, a method of manufacturing the phosphor, and a plasma display panel manufactured by using the phosphor. A phosphor of the invention containing Mn as an activator is one with Mn serving as a major emission, wherein a ratio of an activator concentration in a superficial portion of a phosphor particle to an activator concentration inside the phosphor particle is 0.3-0.7.

Phosphor and plasma display panel

It is an object of the present invention to control damage of a phosphor caused by an etching solution. Disclosed is a method of manufacturing a phosphor having the steps of: (a) crushing phosphor particles via a crushing treatment process, and (b) surface-treating phosphor particles dispersed in a solvent by adding an etching solution via a surface treatment process, wherein an adding speed of the etching solution is in a range of 1.2&#xd7;10-7.0&#xd7;10mol/min. per 1 mof specific surface area of the phosphor particles.

Method for manufacturing phosphor, phosphor and plasma display panel

A photothermographica material is disclosed, comprising an organic silver salt and a light sensitive silver halide, wherein the photothermographic material contains a hydrophilic binder of 0.5 to 2 g per mol of the organic silver salt and the organic silver salt having been formed in the presence of the silver halide of 7&times;10 to 3&times;10 grains per mol of the organic salt.

Photothermographic material and image forming method

Photothermographic image forming material

A thermally developable photosensitive material comprising organic silver salts, photosensitive silver halides, and reducing agents. The thermally developable photosensitive material has a support having am moisture content of not more than 0.5 percent by weight.

Thermally developable photosensitive material

A silver halide light sensitive photographic material is disclosed, comprising a support having thereon hydrophilic colloid layers including a silver halide emulsion layer, wherein (i) at least 50% of the total projected area of silver halide grains contained in the emulsion layer is accounted for by tabular grains having an aspect ratio of 3 to 15, (ii) the tabular grains each comprising an inner region which accounts for 70% by volume of the grain and a residual outer region, the outer region containing at least 75% of total iodide contained in the grain, and (iii) the tabular grains each having an outermost layer, a halide content distribution among the tabular grains with respect to the outermost layer being not more than 20%; and wherein at least one of the hydrophilic colloid layers contains a sulfur containing compound, which has a water-solubilizing group.

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Tokyo, Japan

Kazuyoshi Goan