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Dynamically reversibly adjustable metal chiral nanometer structure and method for preparing same

A nanostructure and chiral technology, which is applied in the field of metal chiral nanostructure and its preparation, can solve the problems of high experiment cost, etc., and achieve the effect of reducing experiment cost and reducing consumption

Inactive Publication Date: 2016-12-07
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these experiments require multiple preparations of samples of different shapes to meet different chiral response frequency bands; in this process, multiple preparations require a large amount of precious metal coating materials; these precious metals are generally more than 99.99% pure Gold or silver, resulting in high experimental costs

Method used

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  • Dynamically reversibly adjustable metal chiral nanometer structure and method for preparing same
  • Dynamically reversibly adjustable metal chiral nanometer structure and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A dynamically reversible adjustable metal chiral nanostructure, the structure is to vapor-deposit a metal material on a polystyrene-based template, and then spin-coat a layer of temperature-sensitive material colloid after the metal material is evaporated. Rotate the substrate 90° clockwise, and vapor-deposit the metal material again.

[0033] In this embodiment, the metal material is gold; the temperature-sensitive material colloid is isopropylacrylamide.

[0034] The preparation method of the metal chiral nanostructure with dynamic reversible adjustment in this embodiment, the preparation method comprises the following steps:

[0035] Step 1, prepare at least five 1cm*2cm glass pieces a and two 1cm*1cm glass pieces b, and clean them. The specific cleaning process is: scrub the glass pieces a and insulating detergent, put them into acetone ultrasonic 15 minutes, then rinse the acetone with deionized water, and then ultrasonically use alcohol for 15 minutes, then rinse...

Embodiment 2

[0048] A dynamically reversible adjustable metal chiral nanostructure, the structure is to vapor-deposit a metal material on a polystyrene-based template, and then spin-coat a layer of temperature-sensitive material colloid after the metal material is evaporated. Rotate the substrate 90° counterclockwise, and vapor-deposit the metal material again.

[0049] In this embodiment, the metal material is silver; the temperature-sensitive material colloid is polyethylene.

[0050] The preparation method is the same as that in Example 1, except that the thickness d of the spin-coated temperature-sensitive material isopropylacrylamide is 200 nm.

Embodiment 3

[0052] A dynamically reversible adjustable metal chiral nanostructure, the structure is to vapor-deposit a metal material on a polystyrene-based template, and then spin-coat a layer of temperature-sensitive material colloid after the metal material is evaporated. Rotate the substrate 90° clockwise, and vapor-deposit the metal material again.

[0053] In this embodiment, the metal material is gold; the temperature-sensitive material colloid is polyisobutylene.

[0054] The preparation method is the same as that in Example 1, except that the thickness d of the spin-coated temperature-sensitive material polyisobutylene is 20 nm.

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Abstract

The invention relates to the technical field of metal nanometer materials, in particular to a dynamically reversibly adjustable metal chiral nanometer structure and a method for preparing the same. Metal materials are evaporated on mold plates with polystyrene which is used as a substrate, a layer of temperature-sensitive material colloid is rotationally coated on the metal materials after the metal materials are completely evaporated, the substrate rotates clockwise or anticlockwise by an angle 90 degrees after the temperature-sensitive material colloid is completely rotationally coated, and metal materials are further evaporated on the mold plates to obtain the dynamically reversibly adjustable metal chiral nanometer structure. The dynamically reversibly adjustable metal chiral nanometer structure and the method have the advantages that thermo-sensitive materials are led into the structure, the temperature of the structure can be adjusted, accordingly, the thicknesses of the thermo-sensitive colloidal materials can be changed, and the integral shape of the corresponding metal chiral nanometer structure can be reversibly adjusted; the structure only needs to be prepared at one step, so that chiral signal response wave bands of the metal chiral nanometer structure can be freely adjusted in certain wave bands and can be repeatedly adjusted, precious metal material consumption can be reduced to a great extent, and the experiment cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of metal nanomaterials, in particular to a dynamically reversible regulated metal chiral nanostructure and a preparation method thereof. Background technique [0002] Geometric chirality refers to the property that a structure cannot coincide with its mirror image structure. Optical chirality, or circular dichroism, refers to the property that chiral structures absorb differently for left-handed circularly polarized light and right-handed circularly polarized light. In nature, there are also many chiral structures, such as DNA and proteins. By analyzing the circular dichroism spectra of chiral molecules, the chemical structure of chiral molecules can be determined. However, the circular dichroism of biomolecules is relatively weak, which is not conducive to signal detection. Because the artificial metal chiral nanostructure has a stronger interaction with light, it exhibits stronger circular dichroism, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18B82Y40/00C23C14/24C23C14/20C08L25/06
CPCB82Y40/00C08J5/18C08J7/04C08J7/0423C08J2325/06C08J2423/06C08J2423/22C23C14/20C23C14/225C23C14/24
Inventor 张中月王勇凯
Owner SHAANXI NORMAL UNIV