Metal nanoparticle composite and process for production thereof

A technology of metal particles and manufacturing methods, applied in metal material coating process, device for coating liquid on the surface, liquid chemical plating, etc., to achieve the effect of easy adjustment and adjustment

Active Publication Date: 2012-11-14
NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the particle size of the metal particles obtained by photoreduction reaches the maximum on the ultraviolet irradiation surface, that is, the surface layer ...

Method used

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  • Metal nanoparticle composite and process for production thereof
  • Metal nanoparticle composite and process for production thereof
  • Metal nanoparticle composite and process for production thereof

Examples

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no. 1 Embodiment approach

[0048] First, the metal microparticle composite and its manufacturing method according to the first embodiment of the present invention will be described.

[0049]

[0050] 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 layer 1 and metal fine particles 3 immobilized in the matrix resin layer 1 . figure 2 Schematically shows the cross-sectional structure of the surface direction of the nanocomposite 10, image 3 It is an enlarged view illustrating the metal microparticles 3 . In addition, in image 3 , the particle size of the larger metal particle 3 among the adjacent metal particles 3 is expressed as D L , the particle size of the smaller metal particle 3 is expressed as D S , but when the two are not distinguished...

no. 2 Embodiment approach

[0159] Next, a second embodiment of the present invention will be described in detail. The method for producing a metal particle composite in this embodiment is to produce metal particles in which metal particles having an average particle diameter in the range of 20 nm to 30 nm are dispersed independently (preferably completely independently) without contacting each other in a polyimide resin. The method of the composite includes the following steps A and B. Here, the polyimide resin is a resin mainly composed of a polyimide resin obtained by imidating a polyamic acid resin which is a precursor thereof by heating to cause dehydration and a cyclization reaction. Polyimide resins are preferably used because they are superior in heat resistance and dimensional stability compared to other synthetic resins such as thermosetting resins such as epoxy resins, phenol resins, and acrylic resins. In addition, it is also advantageous that the polyimide resin has heat resistance at a tem...

Embodiment

[0193] Next, the present invention will be specifically described by way of examples, but the present invention is not limited by these examples. In addition, in the examples of the present invention, unless otherwise specified, various measurements and evaluations were performed as follows.

[0194] [Measurement of average particle diameter of metal fine particles]

[0195] For the measurement of the average particle diameter of the metal fine particles, the cross section of the sample was made into ultrathin sections using a microtome (manufactured by Leica Corporation, ULTRACUT UTC ultramicrotome), and a transmission electron microscope (TEM; manufactured by JEOL Ltd., JEM -2000EX) for observation. Moreover, since it is difficult to observe the sample produced on the glass substrate by the said method, the observation was performed using the sample produced on the polyimide film under the same conditions. In addition, the average particle diameter of a metal fine particle...

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Abstract

A metal nanoparticle composite which is provided with a matrix resin layer and metal nanoparticles immobilized in the matrix resin layer and which has the following characteristics: (a) the metal nanoparticles are particles obtained by heat-reducing metal ions or metal salts which are contained in either the matrix resin layer or a precursor resin layer thereof; (b) the metal nanoparticles are present within a region extending from the surface of the matrix resin layer to a depth of at least 50nm; (c) the particle diameters of the metal nanoparticles fall within the range of 1 to 100nm with the mean particle diameter being 3nm or more; and (d) the spacing between adjacent metal nanoparticles is equal to or larger than the particle diameter of the bigger of the adjacent metal nanoparticles.

Description

technical field [0001] The present invention relates to a metal microparticle composite that can be used in various devices using, for example, localized surface plasmon resonance, and a method for producing the same. 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 underway for applications such as development of high-power light-emitting lasers utilizing the effect of increasing 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...

Claims

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Application Information

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IPC IPC(8): C08J7/00B05D3/02
CPCC22C2001/1089C08J7/00C09D5/32C22C1/1026C08J7/08C22C32/0094C08J7/14C08K3/08Y10S977/778Y10S977/90B22F9/20C09D7/1283C08L79/08H01B1/22C08G73/1042C08G73/1067C23C18/08C09D5/30C09D7/69C22C1/1089C08J2379/08
Inventor 松村康史新田龙三榎本靖
Owner NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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