Nanostructured colour film having dual-phase first layer and/or amorphous metallic second layer

Patent metadata

Field	Value
Publication number	US-11168401-B2
Application number	US-201916394332-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Apr 25, 2019
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A system and a method for a nanostructured film including a first layer for reflecting at least a portion of an electromagnetic radiation and a second layer for receiving the remainder of the electromagnetic radiation through the first layer and subsequently reflecting at least a portion of the received electromagnetic radiation through the first layer, wherein two electromagnetic radiations with the same wavelength reflected by the first and second layers respectively are combined to form a strengthened electromagnetic radiation, the wavelength of the strengthened electromagnetic radiation being variable based on the physical property of the first layer.

First claim

The invention claimed is:

1. A nanostructured film, comprising
a first layer for reflecting at least a portion of an electromagnetic radiation; and
a second layer for receiving the remainder of the electromagnetic radiation through the first layer and subsequently reflecting at least a portion of the received electromagnetic radiation through the first layer;
wherein two electromagnetic radiations with the same wavelength reflected by the first and second layers respectively are combined to form a strengthened electromagnetic radiation, the wavelength of the strengthened electromagnetic radiation being variable based on a physical property of the first layer, and wherein: (a) the first layer is dual-phase or (b) the second layer is an amorphous metallic layer or (c) both the first layer is a dual-phase and the second layer is an amorphous metallic layer.

2. The nanostructured film according to claim 1 , wherein the wavelength of the electromagnetic radiation reflected by the first layer is manipulated by the physical property.

3. The nanostructured film according to claim 1 , wherein the physical property includes at least one of the reflectivity and the dimension.

4. The nanostructured film according to claim 1 , wherein the two reflected electromagnetic radiations interact with each other to form a visible electromagnetic radiation with a predetermined colour.

5. The nanostructured film according to claim 4 , wherein the two reflected electromagnetic radiations with the same wavelength form the visible electromagnetic radiation by way of constructive interference.

6. The nanostructured film according to claim 1 , wherein the first layer is arranged to undergo chemical reaction with oxygen and the reflectivity of the first layer is manipulated by content of the oxygen in the chemical reaction.

7. The nanostructured film according to claim 6 , wherein the reflectivity of the first layer is proportional to the oxygen content.

8. The nanostructured film according to claim 6 , wherein the electronic structure of the first layer is manipulated by the oxygen content and the colour of the film is manipulated by the electronic structure.

9. The nanostructured film according to claim 8 , wherein a portion of the electromagnetic radiation is absorbed by the electrons in the electronic structure of the first layer.

10. The nanostructured film according to claim 1 , wherein the dual-phase includes at least one of crystalline phase and amorphous phase.

11. The nanostructured film according to claim 10 , wherein the first layer is a layer of metal-oxide with nanocrystals embedded in an amorphous matrix.

12. The nanostructured film according to claim 1 , wherein the reflectivity of the first layer is manipulated by the thickness of the first layer.

13. The nanostructured film according to claim 12 , wherein the reflectivity of the first layer is proportional to the thickness of the first layer.

14. The nanostructured film according to claim 1 , wherein the first layer has a reflectance ranged from 10% to 100%.

15. The nanostructured film according to claim 1 , wherein the second layer is metal or non-metal.

16. The nanostructured film according to claim 15 , wherein the second layer is a non-metal selected from Si wafer, fused SiO 2 , glass, ceramics and polymer.

17. The nanostructured film according to claim 1 , wherein the first layer has a thickness equal to or greater than 1 nm.

18. The nanostructured film according to claim 17 , wherein the first layer has a roughness of no more than 100 nm.

19. The nanostructured film according to claim 1 , wherein the first layer is non-metal.

20. The nanostructured film according to claim 1 , wherein the first layer includes metal oxide.

21. The nanostructured film according to claim 20 , wherein the metal is selected from a group comprising Mg, Zn, Ca, Al, Ti and the combination thereof.

22. The nanostructured film according to claim 1 , wherein the first layer is formed by at least one of magnetron sputtering, vacuum evaporation, sputter coating, plasma coating, and ion plating.

23. The nanostructured film according to claim 1 , wherein the nanostructured film has a Vickers hardness of no less than 2 GPa.

Assignees

• Univ City Hong Kong

Inventors

• Lu Jian
• Bu Yu
• Wu Ge

Classifications

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• C23C14/35

  by application of a magnetic field, e.g. magnetron sputtering {(C23C14/3457 takes precedence)} · CPC title

• C23C28/046

  with at least one amorphous inorganic material layer, e.g. DLC, a-C:H, a-C:Me, the layer being doped or not · CPC title

• C23C14/3414

  Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title