Electroplating Engineers of Japan Limited

Tanaka Kikinzoku Kogyo K.k.

Gunma University

Eeja Ltd.

Masahiro Ito

Hitoshi Kubo

Yuusuke Ohshima

Yuichi Makita

Shingo Watanabe

Teruhisa Iwai

Tetsuo Okutsu

Shigeki Yamanaka

Yuichi Adachi

Akihiro Takura

Electromagnetic waves are uniformly distributed on the light-receiving surface side by taking advantage of their property of being easily concentrated in sharp parts, and the front area (S) on the emission surface side is made larger than the back area (S) on the light-receiving surface side (S/S>1), thereby forming a more moderate electric field region. A reduced gold fine particle group (average particle size: 20 nm) was self-assembled on a transparent polyester resin film and half-submerged and fixed. This base material was repeatedly immersed in an electroless gold plating solution so that gold particles were deposited on the gold fine particles. 10 microliters of a protein solution was added dropwise to this nanostructured substrate, and crystallized by a hanging drop vapor diffusion method.

Biopolymer concentration method, crystallization method, and nanostructured substrate

A metal ink containing metal particles including silver, a protective agent A including an amine compound, and a protective agent B including a fatty acid. The metal ink is configured such that the protective agent A includes at least one Camine compound, and the protective agent B includes at least one Cfatty acid. It is preferable that the amine compound content is 0.2 mmol/g or more and 1.5 mmol/g or less on a silver particle mass basis. In addition, it is preferable that the fatty acid content is 0.01 mmol/g or more and 0.06 mmol/g or less on a silver particle mass basis.

Metal ink

A laminate structure of metal coating is laminated on a base material, and includes a primer layer, a catalyst layer and a plating deposited layer. The primer layer is a resin layer with a glass transition temperature (Tg) of 40 to 430&#xb0; C. The catalyst layer is a metal nanoparticle group arranged in a plane on the primer layer, wherein the metal nanoparticle group is a metal in Group 11 or Groups 8, 9 and 10 in a periodic table, and the metal nanoparticles are surrounded by the primer layer. Ends of the metal nanoparticles are attached to the plating deposited layer.

Laminate structure of metal coating

The pretreatment solution for electroless plating of the present invention is composed of noble metal colloidal nanoparticles, a sugar alcohol, and water. The colloidal nanoparticles are gold, platinum, or palladium, have an average particle diameter of 5 to 80 nm, and are contained in the pretreatment solution in an amount of 0.01 to 10 g/L as metal mass. The sugar alcohol is at least one selected from the group consisting of tritol, tetritol, pentitol, hexitol, heptitol, octitol, inositol, quercitol, or pentaerythritol and is contained in the pretreatment solution in an amount of 0.01 to 200 g/L in total. The electroless plating method of the present invention uses the pretreatment solution and performs the electroless plating in an electroless plating bath.

Pretreatment solution for electroless plating and electroless plating method

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Hiratsuka, Japan

Masahiro Ito