Japan Science and Technology Agency

Hidetoshi Oikawa

Hachiro Nakanishi

Hitoshi Kasai

Takashi Sekiguchi

Shuji Okada

Tsunenobu Onodera

Koich Baba

Shuji Oikawa

Koichi Baba

Hiroshi Imahori

Tastuya Murakami

Misturu Hashida

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 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

Growing community of inventors

Miyagi, Japan

Hidetoshi Oikawa