Structural color changeable material and strain detection apparatus

Patent metadata

Field	Value
Publication number	US-2018066937-A1
Application number	US-201715696867-A
Country	US
Kind code	A1
Filing date	Sep 6, 2017
Priority date	Sep 6, 2016
Publication date	Mar 8, 2018
Grant date	—

Abstract

A structural color changeable material includes a strain body and surface plasmon generating particles. In the strain body, a strain is produced by an external pressure or an internal change. The surface plasmon generating particles generate surface plasmon and are contained in the strain body. The surface plasmon is generated by an incident light with a wavelength of 2400 nm or less. A mean particle size of the surface plasmon generating particles is equal to or less than the wavelength of the incident light. The surface plasmon generating particles are periodically arranged parallel to an in-plane direction of a reflection surface of the incident light.

First claim

What is claimed is:

1 . A structural color changeable material, comprising:
a strain body in which a strain is produced by an external pressure or an internal change; and surface plasmon generating particles which generate surface plasmon and which are contained in the strain body, wherein the surface plasmon is generated by an incident light with a wavelength of 2400 nm or less, wherein a mean particle size of the surface plasmon generating particles is equal to or less than the wavelength of the incident light, and wherein the surface plasmon generating particles are periodically arranged parallel to an in-plane direction of a reflection surface of the incident light.

2 . The structural color changeable material according to claim 1 , wherein the surface plasmon generating particles contain a metal in the amount of 50 mass % or more with respect to a total mass of the particles.

3 . The structural color changeable material according to claim 2 , wherein the metal is gold.

4 . The structural color changeable material according to claim 1 , wherein the surface plasmon generating particles contain an oxide semiconductor in the amount of 50 mass % or more with respect to a total mass of the particles.

5 . The structural color changeable material according to claim 4 , wherein the oxide semiconductor is zinc oxide.

6 . The structural color changeable material according to claim 1 , wherein the strain body is transparent.

7 . The structural color changeable material according to claim 6 , wherein the surface plasmon generating particles are arranged inside the strain body.

8 . The structural color changeable material according to claim 1 , wherein a distance between adjacent particles of the surface plasmon generating particles in the in-plane direction is equal to or less than the wavelength of the incident light.

9 . The structural color changeable material according to claim 1 , wherein a distance between adjacent particles of the surface plasmon generating particles in a first in-plane direction is equal to or less than the wavelength of the incident light, and a distance between adjacent particles of the surface plasmon generating particles in a second in-plane direction is greater than the wavelength of the incident light,
where the first in-plane direction is the in-plane direction in which the strain is produced in the strain body, and the second in-plane direction is a direction perpendicular to the first in-plane direction.

10 . The structural color changeable material according to claim 1 , wherein the surface plasmon generating particles are periodically arranged only in an in-plane direction.

11 . A strain detection apparatus for visualizing a strain in an in-plane direction of a strain body by means of surface plasmon, comprising:
a structural color changeable material; a light source which emits a beam to the structural color changeable material; a detector which detects a reflection light or a transmitted light from the structural color changeable material; and a signal processor which calculates the strain of the structural color changeable material from the reflection light or the transmitted light detected by the detector, wherein the structural color changeable material comprises:
a strain body in which a strain is produced by an external pressure or an internal change; and
surface plasmon generating particles which generate surface plasmon and which are contained in the strain body,
wherein the surface plasmon is generated by an incident light with a wavelength of 2400 nm or less,
wherein a mean particle size of the surface plasmon generating particles is equal to or less than the wavelength of the incident light, and
wherein the surface plasmon generating particles are periodically arranged parallel to an in-plane direction of a reflection surface of the incident light.

12 . The strain detection apparatus according to claim 11 , wherein the surface plasmon generating particles contain a metal in the amount of 50 mass % or more with respect to a total mass of the particles.

13 . The strain detection apparatus according to claim 12 , wherein the metal is gold.

14 . The strain detection apparatus according to claim 11 , wherein the surface plasmon generating particles contain an oxide semiconductor in the amount of 50 mass % or more with respect to a total mass of the particles.

15 . The strain detection apparatus according to claim 14 , wherein the oxide semiconductor is zinc oxide.

16 . The strain detection apparatus according to claim 11 , wherein the strain body is transparent.

17 . The strain detection apparatus according to claim 16 , wherein the surface plasmon generating particles are arranged inside the strain body.

18 . The strain detection apparatus according to claim 11 , wherein a distance between adjacent particles of the surface plasmon generating particles in the in-plane direction is equal to or less than the wavelength of the incident light.

19 . The strain detection apparatus according to claim 11 , wherein a distance between adjacent particles of the surface plasmon generating particles in a first in-plane direction is equal to or less than the wavelength of the incident light, and a distance between adjacent particles of the surface plasmon generating particles in a second in-plane direction is greater than the wavelength of the incident light,
where the first in-plane direction is the in-plane direction in which the strain is produced in the strain body, and the second in-plane direction is a direction perpendicular to the first in-plane direction.

20 . The strain detection apparatus according to claim 11 , wherein the surface plasmon generating particles are periodically arranged only in an in-plane direction.

Assignees

• Konica Minolta Inc

Inventors

• Ikeda Kazuki
• Ooki Makoto
• Uemura Hideo

Classifications

• G01B11/16 Primary

  for measuring the deformation in a solid, e.g. optical strain gauge · CPC title

• G01N2021/258

  Surface plasmon spectroscopy, e.g. micro- or nanoparticles in suspension · CPC title

• G01N21/25

  Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands · CPC title

• G01L1/241

  by photoelastic stress analysis · CPC title

• G01L1/247

  using distributed sensing elements, e.g. microcapsules (along a single optical fibre G01L1/242) · CPC title