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A preparation method of optical frequency band metamaterial based on gold branched unit

A metamaterial, branched technology, applied in chemical instruments and methods, layered products, glass/slag layered products, etc., can solve the limitations of the wide research and application of metamaterials in the visible light band, the difficulty of preparation, and the complex preparation process, etc. question

Inactive Publication Date: 2016-03-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods require expensive equipment, the preparation process is complex, and the preparation is difficult, which greatly limits the extensive research and application of metamaterials in the visible light band.

Method used

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  • A preparation method of optical frequency band metamaterial based on gold branched unit
  • A preparation method of optical frequency band metamaterial based on gold branched unit
  • A preparation method of optical frequency band metamaterial based on gold branched unit

Examples

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preparation example Construction

[0026] 1. Preparation of gold branched unit structure: first prepare nano-silver particle sol with an average particle size of 20nm, take 5mL deionized water, mix with 0.01-0.05mL nano-silver particle sol with an average particle size of 20nm, and add 0.05M dodecyltrimethylammonium bromide solution 1.0-2.0mL, 0.01MHAuCl 4 Mix 0.1 mL of the solution with 0.5 mL of a freshly prepared 0.1 M ascorbic acid solution, add to the above solution, and keep it at 25° C. for 10 hours to obtain gold branched units with a diameter of 300-500 nm. After the reaction, 1 mL of 1% (w / v) PVP deionized aqueous solution was added for protection to prevent agglomeration and maintain the morphology of gold branched units.

[0027] 2. Soak the glass sheet in Piranha washing solution (V concentrated sulfuric acid: V hydrogen peroxide = 7:3) for half an hour, and then in dilute ammonia water: H 2 o 2 :H 2 O(V 1:1:1 ) mixed solution, acetone, ethanol and ultrapure water for ultrasonic treatment for 2...

Embodiment 1

[0033] (1) Preparation of gold branched unit:

[0034] Prepare 20mL of 0.25mmol / L silver nitrate solution and 20mL of 0.25mmol / L sodium citrate solution, mix and stir at 2000 rpm for 5 minutes, adjust the speed to 3000 rpm, add 0.1mol in 10 seconds / LNaBH 4 Solution 2mL, continue to stir for 1 hour, obtain the silver particle sol of average particle diameter 20nm.

[0035] Take 0.01mL of the above-mentioned nano-silver particle sol, add it to 5mL deionized water, place it on an electromagnetic stirrer, stir at a speed of 700 rpm, and add 0.05M dodecyltrimethylammonium bromide solution 1.0 after stirring for 1 hour. mL, after standing for half an hour, add 0.01MHAuCl under stirring at 2500 rpm 4Solution 0.1mL and newly prepared 0.1M ascorbic acid solution 0.5mL, after 10 hours at 25°C, add 1% (w / v) PVP deionized water solution 1mL, shake gently by hand, after standing for 5 hours, a gray sol was obtained , pour it into a centrifuge tube and centrifuge at 3000 rpm for 10 min,...

Embodiment 2

[0044] (1) Preparation of gold branched unit:

[0045] Prepare 20mL of 0.25mmol / L silver nitrate solution and 20mL of 0.25mmol / L sodium citrate solution, mix and stir at 2000 rpm for 5 minutes, adjust the speed to 3000 rpm, add 0.1mol in 10 seconds / LNaBH 4 Solution 2mL, continue to stir for 1 hour, obtain the silver particle sol of average particle diameter 20nm.

[0046] Take 0.05mL of the above nano-silver particle sol, add it to 5mL deionized water, place it on an electromagnetic stirrer, stir at a speed of 700 rpm, and add 0.05M dodecyltrimethylammonium bromide solution 2.0 after stirring for 1 hour. mL, after standing still for half an hour, add 0.01M HAuCl4 solution 0.1mL and newly prepared 0.1M ascorbic acid solution 0.5mL under stirring at 2500 rpm, and add 1% (w / v) Shake 2mL of PVP deionized water solution by hand. After standing for 5 hours, a gray sol is obtained. Pour it into a centrifuge tube and centrifuge at a speed of 3000 rpm for 10min. Discard the supernat...

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Abstract

The invention relates to a preparation method of an optical frequency band metamaterial based on gold-branch-shaped units and particularly relates to a preparation method of a metamaterial. The preparation method of the metamaterial comprises the following steps: firstly preparing the gold-branch-shaped units in an aqueous solution by using dodecyltrimethylammonium bromide as a template by virtue of a nano self-assembly method, then assembling the prepared gold-branch-shaped units into a single-layer array on a glass substrate, coating the surface of the single-layer array with a PVA (Poly Vinyl Alcoho) film and overlapping the single-layer array and a sheet of ITO (Indium Tin Oxide) conductive glass to form the metamaterial of a composite structure. The metamaterial shows relatively strong transmission passband peak in a visible light frequency band and has obvious plate focusing effect on light with corresponding wavelengths.

Description

technical field [0001] The invention relates to a method for preparing an optical frequency band metamaterial, in particular to a method for preparing an optical frequency band metamaterial based on a gold branch unit. Background technique [0002] Metamaterials (Metamaterials, MMs) are artificial structural materials with negative permittivity and magnetic permeability at the same time. Because the phase velocity and group velocity of the electromagnetic waves propagating in it are in opposite directions, they exhibit a series of abnormal electromagnetic properties, such as abnormal Doppler effect, anomalous Cherenkov radiation, anomalous Goos- Displacement, negative refraction effects, and perfect lens effects, etc. These special properties originate from the structure of the basic units that make up the metamaterial rather than the components themselves. In 2003 and 2006, the negative refraction phenomenon of metamaterials and the "invisibility cloak" prepared based on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B17/06C03C17/36
Inventor 赵炜酒少武杨康
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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