Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Japan Science and Technology Agency

Fujifilm Corporation

Tohoku University

Toda Kogyo Corporation

Japan Science and Technology Corporation

Japan as Represented by Director General of Agency of Industrial Science

Hachiro Nakanishi

Masao Kato

Hitoshi Kasai

Hiro Matsuda

Shuji Okada

Hidetoshi Oikawa

Yoshio Tanaka

Kazuo Nakayama

Hiroo Matsuda

Norihisa Kobayashi

Nanao Horiishi

Eishun Tsuchida

Shinji Yamada

Minoru Ohsugi

Shigeru Takaragi

Yousuke Miyashita

Takashi Fukuda

Takashi Sekiguchi

Chiaki Yokoyama

Kunio Arai

Shuji Oikawa

Koich Baba

Hiroshi Inomata

Xuan-Ming Duan

Tatsumi Kimura

Eiji Sarashina

Tsunenobu Onodera

Akito Masuhara

Yuji Orihashi

Koichi Baba

Hiroshi Imahori

Tastuya Murakami

Misturu Hashida

A method of concentrating nanoparticles, having the steps of: adding and mixing an extraction solvent with a nanoparticles-dispersion liquid that nanoparticles are dispersed in a dispersion solvent, thereby concentrating and extracting the nanoparticles into a phase of the extraction solvent, and removing the dispersion solvent by filter-filtrating a liquid of concentrated extract, in which the extraction solvent is substantially incompatible with the dispersion solvent, and the extract solvent can form an interface after the extraction solvent is mixed with the dispersion solvent and left the mixture still; further a method of deaggregating aggregated nanoparticles, having the steps of: applying two or more ultrasonic waves different in frequency to a liquid containing aggregated nanoparticles, and thereby fining and dispersing the aggregated nanoparticles.

Method of concentrating nanoparticles and method of deaggregating aggregated nanoparticles

A method for fabricating metal-coated organic crystal wherein a reaction of an organic crystal with transition metal salt in alkaline aqueous solution under visible light irradiation, wherein, when energy at the top of valence band of the organic crystal is defined as A (eV) and energy at the bottom of conduction band of the organic crystal is defined as B (eV), redox potential C (V) of transition metal ion or transition metal complex ion, when said transition metal salt is dissolved in the alkaline aqueous solution, these three parameters should satisfy the following relation (1):&#x2212;&#x2212;4.5&#x2267;&#x2003;&#x2003;(1)

Method for fabricating metal-coated organic crystal

A method for concentration of fine particles dispersed in a dispersion into an ionic liquid comprising, adding an ionic liquid, especially an organic ionic liquid at ordinary temperature, e.g., a salt of 1-butyl-3-methylimidazolium with PFto a dilute dispersion of fine particles so as to concentrate the fine particles into the ionic liquid.

Method of concentrating fine particle dispersion and method of recovering fine particle

A method for preparation of inorganic fine particle-organic crystal hybrid fine particle comprising; pouring an organic material having &#x3c0;-conjugated bond as a water soluble solution into aqueous dispersion in which inorganic fine particles of 50 nm or less selected from the compound group consisting of metal fine particles, semi-conductor fine particles, fine particles of inorganic fluorescent material and fine particle of inorganic luminescent material, are dispersed, co-precipitating said inorganic fine particle which forms a core into said organic material which forms a shell in said dispersion and forming shell of fine crystal of said organic material on the surface of the core of said inorganic fine particles of 50 nm or less by controlling the size of said inorganic fine particle and by controlling the adding amount of said organic material.

Method for preparing organic-inorganic composite microcrystal

The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.

Process for producing pigment nanoparticle

The method for preparation quinacridone pigment nanocrystals with sub micrometer to nanometer in average size comprising, supplying supercritical or semi-critical liquid, which dissolves quinacridone pigment, into a specimen tube (ST) composing a reactor possessing a filter of desired opening to the upper stream side and to the down stream side in which quinacridone pigment is set up, flowing out the supercritical or semi-critical liquid in which quinacridone pigment is dissolved from said reactor to a mixing apparatus to which coolant is supplied, and by selecting the kind of supercritical of semi-critical liquid and combination of conditions e.g. supplying speed of each liquids, temperature of the liquid and the reacting pressure.

Process for producing quinacridone pigment microcrystals

Disclosed is a novel aromatic ester compound represented by the general formula ##STR1## in which Pn is a 1,4-phenylene group, R.sup.1 is an alkyl group having 1 to 4 carbon atoms, R.sup.2 is a group selected from the group consisting of perfluoroalkyl groups having 1 to 4 carbon atoms, cyano group, nitro group, 2,2-dicyanoethenyl group and methylsulfonyl group and the subscript n is a number of 2, 3 or 4. These aromatic ester compounds are useful as a second-order non-linear optical material in the ultraviolet wavelength range so that a resin film containing the compound has a good second-order non-linear optical coefficient d.sub.33 of 2-4.times.10.sup.-9 esu.

Aromatic ester compound and second-order non-linear optical material

Disclosed herein are polydiphenyldiacetylenes having the following repeating unit (III): ##STR1## (wherein R.sup.1 denotes a hydrogen atom or a methoxy group; R.sup.2 denotes a hydrogen atom, a methoxy group or a methylamino group; R.sup.3 denotes a hydrogen atom or a trifluoromethyl group; and R.sup.4 denotes a hydrogen atom or a trifluoromethyl group; provided that R.sup.1 is not a hydrogen atom when R.sup.2 is hydrogen atom, and R.sup.3 is not a hydrogen atom when R.sup.4 is hydrogen atom).

Polydiphenyldiacetylenes

A polymeric nonlinear optical material is produced by mixing a polyelectrolyte solution with an ionic pigment solution thereby obtaining a solution containing a composite of said polyelectrolyte and said ionic pigment, and separating said composite from said solution.

Method for production of polymeric nonlinear optical material

A thickness determination method for organic films comprises the steps of: irradiating an organic film to be measured with x-rays at a certain angle of incidence, finding an angle of reflection at which the x-ray intensity reaches a peak, and finding the thickness of the film from the angle of this peak.

Method using x-rays to determine thickness of organic films

##STR1## (wherein R.sub.1 and R.sub.2 independently stand for at least one member selected from the class consisting of alkylene groups, substituted alkylene groups, cycloalkylene groups, substituted cycloakylene groups, arylene groups, and substituted arylene groups), is a novel diacetylene-nylon salt compound possessing two kinds of ability of solid-state polymerization, and two-dimensional macromolecular crystals are obtained by severally polymerizing the diacetylene moiety and the nylon salt moiety of the compound. A shaped article of hig rigidity is produced by filling a mold with the aforementioned salt and subjecting the salt in the mold to simultaneous application of heat and pressure.

Diacetylene-nylon salt compound and method for production of

##STR1## (wherein R.sub.1 and R.sub.2 independently stand for at least one member selected from the class consisting of alkylene groups, substituted alkylene groups, cycloalkylene groups, substituted cycloalkylene groups, arylene groups, and substituted arylene groups), is a novel diacetylene-nylon salt compound possessing two kinds of ability of solid-state polymerization, and two-dimensional macromolecular crystals are obtained by severally polymerizing the diacetylene moiety and the nylon salt moiety of the compound. A shaped article of high rigidity is produced by filling a mold with the aforementioned salt and subjecting the salt in the mold to simultaneous application of heat and pressure.

Cyanometallophthalocyanine crystals which are organic electroconductive crystals are produced by electrolysis of an electrolyte containing an alkali salt of dicyanometallophthalocyanine. Organic electroconductive crystals of better quality are produced by causing the cyanometallophthalocyanine crystals mentioned above to incorporate therein an electron accepting compound and an electron donating compound as doping substances.

Method for production of organic electroconductive crystals

Growing community of inventors

Miyagi, Japan

Hachiro Nakanishi