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Nanostructure substrate

A substrate and structure technology, applied in the field of nanostructured substrates, can solve the problems of uneven local heating field and the like

Pending Publication Date: 2021-09-10
EEJA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this gold microparticle array has the following problem: for the electromagnetic field incident from the surface side, an uneven local heating field (hot spot) such as a two-dimensional array structure of gold nanoblocks as shown in FIG.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105]

[0106] Next, this transparent substrate was immersed in a 65° C. electroless gold plating solution (improved bath of PRECIOUSFAB ACG3000WX manufactured by Electroplating Engineers of Japan Co., Ltd.) for 10 seconds as one cycle. Repeat this step for 3 cycles to form a gold coating layer. That is, gold crystal grains are deposited on the fixed gold microparticle group. which is displayed on image 3 .

[0107] From image 3 It can be seen that in the gold coating layer, the diameter of most of the gold fine particle groups increases to become a mushroom shape, and when viewed from above, it grows into a hemispherical shape. Such as figure 1 As shown, the geometric surface area of ​​the surface side of the composite particle group is larger than that of the back side. The average particle diameter of the gold coating layer was measured from the image of the scanning electron microscope, and the average particle diameter of the gold coating layer was in the range ...

Embodiment 2

[0112]

[0113] The electroless gold plating step was repeated for 3 more cycles, and as a result, the color of the nanostructured substrate changed from blue-purple to dark purple. An image of the heat-treated nanostructured substrate viewed from the surface side is shown in Figure 4 . Figure 4 The origin of the sea-island structure corresponding to Embodiment 2 can still be seen in the figure.

[0114] again, Figure 4 In , it is observed that a large number of gold coating layers are connected to grow into L-shaped blocks. In addition, traces of multiple gold coating layers can be observed in this L-shaped block. From this, it can be seen that the height of the gold coating layer is different in the L-shaped block. Also, the geometric surface area on the front side of the composite particle group is larger than the geometric surface area on the back side.

[0115] The absorption spectrum distribution of gold was observed in the same manner as in Example 1. This ab...

Embodiment 3

[0118] The electroless gold plating step was repeated for 3 cycles to produce a gold coating layer. Such as Figure 5 As shown, it is observed that the black part of the sea begins to disappear. It can be said to be the final stage of island structure. Because the composite particle population remains spherical, the geometric surface area on the surface side of the composite particle population is greater than the geometric surface area on the rear side. The color of the nanostructured substrate changed from blue-purple to gold. Figure 6 The uppermost curve in is the plasmonic sub-curve of Example 3.

[0119] As can be clearly seen from the results of the above examples and conventional examples, if the nanostructured substrate formed by the coating layer of the present invention is used, it can be seen that the absorbance is increased compared with the comparative example. That is, it was found that when electromagnetic waves are incident on the nanostructure substrate o...

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Abstract

The purpose of the present invention is to provide a nanostructure substrate comprising a composite particle group in which a reductively deposited coating layer exhibits a cohesive polarization action and / or an electromagnetic polarization action, and to provide a nanostructure substrate in which such active sites are dramatically increased to enable a medium to react homogenously across the entire nanostructure substrate. A gold microparticle group (average particle diameter of 20 nm) was reductively deposited from an aqueous solution and made to self-assemble on a transparent semi-cured polyester resin film. A bottom portion of the gold microparticle group was sunk halfway into the polyester resin film so as to be embedded on the surface side of a transparent resin substrate. Next, the transparent substrate was repeatedly submerged in an electroless gold-plating liquid to cause gold crystal grains to deposit on the fixed gold microparticle group.

Description

technical field [0001] The present invention relates to a nanostructured substrate utilizing coagulation polarization and / or electromagnetic polarization of precipitated metals, and can be applied, for example, to nanostructures of various devices utilizing localized surface plasmon resonance (hereinafter referred to as plasmon) substrate. Background technique [0002] If metal particles are miniaturized to a size of tens of nanometers smaller than 100 nm, functions not seen in bulk metals can be exhibited. For example, a group of metal fine particles reduced from an aqueous solution has a strong cohesive force even in an aqueous solution. Therefore, it is known that aggregation and polarization of fine particles occur among fine particles, and that fine particles of metal are bonded to each other. In addition, it is known that plasmons of gold microparticles generate strong absorption bands in the visible light region. The plasmons are considered to be resonant vibration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00C23C18/16C23C18/52
CPCB82Y30/00G01N21/658G01N21/554G02B5/008G02B5/3058G02B2207/101C23C18/42B82B1/00C23C18/16C23C18/52C23C18/1844C23C18/44
Inventor 伊东正浩山中茂树
Owner EEJA LTD
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