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Composite having metal microparticles dispersed therein and process for production thereof, and substrate capable of generating localized surface plasmon resonance

A technology of metal microparticles and manufacturing methods, applied in nanotechnology for materials and surface science, analyzing materials, material analysis through optical means, etc., can solve problems such as different degrees of dispersion, generation of metal oxides, in-plane inhomogeneity, etc.

Inactive Publication Date: 2013-10-09
NIPPON STEEL CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Patent Document 1 has a problem that, when the metal fine particles are immobilized, the degree of dispersion is different due to the change in the concentration of the metal fine particles, and the in-plane unevenness becomes large.
Furthermore, depending on the type of metal, there may be a problem that metal oxides are formed, and localized surface plasmon resonance that metal fine particles have is not expressed.

Method used

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  • Composite having metal microparticles dispersed therein and process for production thereof, and substrate capable of generating localized surface plasmon resonance
  • Composite having metal microparticles dispersed therein and process for production thereof, and substrate capable of generating localized surface plasmon resonance
  • Composite having metal microparticles dispersed therein and process for production thereof, and substrate capable of generating localized surface plasmon resonance

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Experimental program
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preparation example Construction

[0153] The preparation of the slurry is carried out by dispersing the boehmite powder in a solvent such as water or a polar organic solvent, and it is advisable to carry out the preparation in the following manner, that is, with respect to 100 parts by weight of the solvent, the boehmite used The powder is preferably in the range of 5 parts by weight to 40 parts by weight, more preferably in the range of 10 parts by weight to 25 parts by weight. Examples of solvents used include water, methanol, ethanol, glycerin, N,N-dimethylformamide, N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone Wait. These solvents can also be used in combination of 2 or more types. The mixed solution is desirably subjected to a dispersion treatment in order to improve the dispersibility of the boehmite powder. The dispersion treatment can be performed, for example, by a method of stirring at room temperature for 5 minutes or more, a method of using ultrasonic waves, or the like.

[0154]In order...

Embodiment 1-1

[0358] Add 17 g of water and 0.5 oz. g of acetic acid and sonicate for 5 min. Furthermore, 17 g of ethanol and 1.25 g of auric chloride tetrahydrate were added, and ultrasonic treatment was performed for 5 minutes, thereby preparing gold complex-containing slurry 1-1.

[0359] In the gold complex-containing slurry 1-1 at this time, the ratio of the Au element was 10 parts by weight relative to 100 parts by weight of boehmite. After coating the obtained gold complex-containing paste 1-1 on a glass substrate using a spin coater (manufactured by Mikasa Co., Ltd., trade name: SPINCOATER 1H-DX2), Drying at 70° C. for 3 minutes, drying at 130° C. for 10 minutes, and further heat treatment at 280° C. for 10 minutes produced a red metallic gold fine particle-dispersed nanocomposite material 1-1 (thickness: 1.18 μm). The metal gold particles formed in the nanocomposite material 1-1 are completely independent in the region from the surface layer of the film to the inside in the thickn...

Embodiment 1-2

[0365] After preparing the gold complex-containing slurry 1-2 in the same manner as in Example 1-1, the obtained gold complex-containing slurry 1-2 was coated, dried, and further heat-treated to prepare Red metallic gold microparticle-dispersed nanocomposite material 1-2 (thickness 1.83 μm). The metal gold particles formed in the nanocomposite material 1-2 are completely independent in the region from the surface layer of the film to the inside in the thickness direction, and the particles of the larger metal gold particles among the adjacent metal gold particles Scattered at intervals above the diameter. The characteristics of this nanocomposite material 1-2 are as follows.

[0366] 1) Porosity of nanocomposite material 1-2: 56%, void size: average 9 nm, maximum 120 nm.

[0367] 2) Shape of metallic gold microparticles: approximately spherical, average particle diameter: 37nm, minimum particle diameter: 14nm, maximum particle diameter: 61nm, ratio of particles within the ra...

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Abstract

A nanocomposite (10) comprises: a matrix layer (1) which comprises solid backbone parts (1a) and voids (1b) formed by the solid backbone parts (1a); and metal microparticles (3) which are fixed on the solid backbone parts (1a) of the matrix layer (1). The solid backbone parts (1a) comprise an aluminum oxyhydroxide or an alumina hydrate and form a three-dimensional network structure. In the metal microparticles (3), metal microparticles having an average particle diameter falling within the range of 3-100 nm and particle diameters falling within the range of 1-100 nm make up 60% or more of the metal microparticles (3). The metal microparticles (3) exist in such a manner that the metal microparticles (3) are not in contact with one another and any two adjacent metal microparticles (3) are apart from each other by a distance that is equal to or greater than the particle diameter (D L ) of one of the two adjacent metal microparticles (3) which has a larger particle diameter (D) than that of the other one. Each of the metal microparticles (3) has a part that is exposed to the voids (1b) of the matrix layer (1), and the metal microparticles (3) exist in a state dispersed three-dimensionally in the matrix layer (1).

Description

technical field [0001] The present invention relates to a metal microparticle dispersion composite, a manufacturing method thereof, and a substrate for generating localized surface plasmon resonance. The metal microparticle dispersion composite is composed of a matrix with a three-dimensional mesh structure and metal microparticles. For example, it can be used in various devices utilizing localized surface plasmon resonance. Background technique [0002] In addition to having a geometrically high specific surface area, nanometer size particles also exhibit changes in optical properties, lower melting points, high catalytic properties, and high magnetic properties through the quantum size effect. etc. Therefore, new functions that cannot be obtained from bulk (bulk) materials, such as catalytic reactions or improvements in chemical and physical conversion properties such as luminescent properties, can be expected. It has become a very important material in various fields. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27B82Y30/00G01N21/01G01N33/532G01N33/543
CPCG01N21/554G02B5/008B82Y30/00Y10T428/24997Y10T428/249921G01N21/552G01N33/532G01N33/543
Inventor 松村康史榎本靖新田龙三
Owner NIPPON STEEL CHEMICAL CO LTD
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