Metal microparticle composite

A technology for metal particles and composites, applied in the measurement of color/spectral properties, nanotechnology, instruments, etc., can solve the problems of uneven distribution of metal particles, difficulty in miniaturization of measuring devices, unstable intensity or sharpness of absorption spectrum, etc. , to achieve the effect of simple composition

Inactive Publication Date: 2012-12-12
NIPPON STEEL CHEMICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, since the techniques of Patent Documents 7 and 8 use metal thin films, they have the following disadvantages in sensors using surface plasmon resonance. In order to achieve high-precision sensing and detection, optical systems such as prisms and goniometers are auxiliary required. It is difficult to miniaturize instruments and measurement devices, and it is not suitable for simple sensor detection
In the technology of Patent Document 9, since the metal particles are only chemically fixed on the glass substrate, there is a risk that the distribution of the metal particles on the substrate will become uneven due to the detachment of the metal particles.
Therefore, in the technique of Patent Document 9, the intensity or sharpness of the absorption spectrum may not be stable when the analyte is adsorbed on the receptor, and there is room for improvement.

Method used

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no. 1 Embodiment approach

[0066] First, the metal microparticle composite and its manufacturing method according to the first embodiment of the present invention will be described.

[0067]

[0068] figure 1 A cross-sectional structure in the thickness direction of a metal microparticle-dispersed nanocomposite (hereinafter also simply referred to as "nanocomposite") 10 as the metal microparticle composite of the present embodiment is schematically shown. The nanocomposite 10 includes a matrix resin 1 and metal fine particles 3 immobilized in the matrix resin 1 . figure 2 Schematically shows the cross-sectional structure of the nanocomposite 10 in the plane direction, image 3 It is an enlarged view illustrating the metal microparticles 3 .

[0069] The nanocomposite 10 may also include an unillustrated base material. As such substrates, for example, glass, ceramics, silicon wafers, semiconductors, paper, metals, metal alloys, metal oxides, synthetic resins, organic / inorganic composite materials, ...

no. 2 Embodiment approach

[0172] Next, a second embodiment of the present invention will be described in detail.

[0173]

[0174] Figure 5 The cross-sectional structure in the thickness direction of the metal microparticle-dispersed nanocomposite 20 as the metal microparticle composite of the present embodiment is schematically shown. The nanocomposite 20 includes a matrix resin 1 , metal microparticles 3 immobilized in the matrix resin 1 , and bonding species 7 immobilized on a part or all of the metal microparticles 3 . Figure 6 It is an enlarged view illustrating the metal microparticles 3 (however, in a state where the chemical species 7 is not immobilized). in addition, Figure 6 The particle size of the larger metal particle 3 among the adjacent metal particles 3 is represented as D L , express the particle size of the smaller metal particle 3 as D S , when the two are not distinguished, it is only expressed as the particle size D.

[0175] In addition, the nanocomposite 20 may include ...

Synthetic example 1

[0283] In a 500 ml separable flask, 15.24 g of 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (TFMB) 47.6 mmol was dissolved in 170 g of DMAc while stirring. Next, 14.76 g of 4,4'-oxydiphthalic anhydride (ODPA) 47.6 mmol was added to the solution under nitrogen flow, and the polymerization reaction was carried out at room temperature for 4 hours with continuous stirring to obtain a colorless viscous polymer. Amic acid resin solution S 1 . The resulting polyamic acid solution S 1 The viscosity was 3251 cP (25° C.) as a result of measurement with an E-type viscometer (manufactured by Brookfield, DV-II+Pro CP type). The weight average molecular weight (Mw) was measured by gel permeation chromatography (GPC; Tosoh Corporation make, HLC-8220GPC), and it was Mw=163900.

[0284] The resulting polyamic acid resin solution S 1 Coated on a stainless steel substrate, dried at 125°C for 3 minutes, then 2 minutes at 160°C, 30 minutes at 190°C, 30 minutes at 200°C, 3 minutes at 220°C, 2...

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Abstract

A metal microparticle composite is provided, which includes a film-shaped matrix resin and metal microparticles immobilized in the matrix resin. The metal microparticles are obtained by reducing metal ions or metal salts, and the particle diameters of at least 90% of all the metal microparticles are in the range of 10 nm to 80 nm. The metal microparticles that are dispersed in a plane direction parallel to the matrix resin surface in a range of depth within 150 nm from the matrix resin surface to form a metal microparticle layer, and only one metal microparticle having the diameter described is present in the direction of depth in the metal microparticles layer. The spacing between adjacent metal microparticles is greater than and equal to the particle diameter of the larger one of the adjacent metal microparticles.

Description

technical field [0001] The present invention relates to metal microparticle composites that can be used in various devices utilizing, for example, surface plasmon resonance. Background technique [0002] Local Surface Plasmon Resonance (LSPR) is a phenomenon in which electrons in metal particles or metal microstructures with a size of several nm to 100 nm interact with light of a specific wavelength to resonate. Localized surface plasmon resonance has long been used in colored glass that exhibits vivid colors by mixing metal particles inside the glass. In recent years, research has been conducted on applications such as development of high-output light-emitting lasers utilizing the effect of enhancing light intensity, biosensors utilizing the property of changing resonance states upon molecular bonding, and the like. [0003] In order to apply such localized surface plasmon resonance of metal fine particles to sensors and the like, it is necessary to stably immobilize the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B82B1/00B82B3/00C08K3/08C08L79/08C08L101/00G01N21/27
CPCC08L79/08G01N21/554B82Y30/00G01N21/27G01N21/553C08K3/08C08K2003/0806C08K2003/0831Y10T428/24413Y10T428/249921C08J5/18
Inventor 松村康史新田龙三榎本靖
Owner NIPPON STEEL CHEMICAL CO LTD
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