Chiral nanostructure with adjustable circular dichroism and preparation method thereof

A circular dichroism and nanostructure technology, which is applied in the field of chiral nanostructure and its preparation, can solve the problems of expensive precious metal coating materials, spectral line broadening, and inaccurate measurement, so as to facilitate long-term storage and reduce material consumption , The effect of measuring signal accuracy

Inactive Publication Date: 2017-02-15
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon existing designs by adding an insulating material on top that allows lights to pass normally but also adjusts its direction depending on their orientation. It achieves this by controlling how much space they occupy when lit up or closed off. By doing things like reducing costs while maintaining accuracy during measurements, these new design results are useful for making sensors that have high precision over time.

Problems solved by technology

Technological Problem: Current techniques used to measure linear dichromaticity (LD) involve complicated procedures involving several steps like creation of specific shapes, addition of expensive coatings material, etc., leading to increased complexity and expenses compared to simpler ones.

Method used

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  • Chiral nanostructure with adjustable circular dichroism and preparation method thereof

Examples

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Embodiment 1

[0041] A chiral nanostructure with adjustable circular dichroism, the original structure of the structure is L-type, there is a gap between the long side and the short side of the L-type, the long side of the L-type is silver, and the thickness is 50nm; L The short side of the type is a two-layer structure perpendicular to the long side. The bottom layer is silicon dioxide with a thickness of 20nm, and the upper layer is silver with a thickness of 50nm; SiO2 forms a chiral nanostructure with tunable circular dichroism.

[0042] The preparation method of any one of the above-mentioned chiral nanostructures with adjustable circular dichroism comprises the following steps:

[0043] Step 1, put the template with the polystyrene ball substrate into the vacuum coating machine, and vacuum;

[0044] Step 2, tilting the substrate by 4°, vapor-depositing silver;

[0045] Step 3, after the silver vapor deposition in the step 2 is completed, rotate the substrate by 90° to vapor deposit ...

Embodiment 2

[0061] A chiral nanostructure with adjustable circular dichroism, the original structure of the structure is L-type, there is a gap between the long side and the short side of the L-type, the long side of the L-type is silver, and the thickness is 300nm; L The short side of the L-type is a two-layer structure perpendicular to the long side. The bottom layer is silicon dioxide with a thickness of 40nm, and the upper layer is silver with a thickness of 300nm; SiO2 forms a chiral nanostructure with tunable circular dichroism.

[0062] The preparation method of any one of the above-mentioned chiral nanostructures with adjustable circular dichroism comprises the following steps:

[0063] Step 1, put the template with the polystyrene ball substrate into the vacuum coating machine, and vacuum;

[0064] Step 2, tilting the substrate by 4°, vapor-depositing silver;

[0065] Step 3, after the silver vapor deposition in the step 2 is completed, rotate the substrate by 90° to vapor depo...

Embodiment 3

[0072] A chiral nanostructure with adjustable circular dichroism, the original structure of the structure is L-type, there is a gap between the long side and the short side of the L-type, the long side of the L-type is silver, and the thickness is 100nm; L The short side of the L-type is a two-layer structure perpendicular to the long side. The bottom layer is silicon dioxide with a thickness of 30nm, and the upper layer is silver with a thickness of 100nm; SiO2 forms a chiral nanostructure with tunable circular dichroism.

[0073] The preparation method of any one of the above-mentioned chiral nanostructures with adjustable circular dichroism comprises the following steps:

[0074] Step 1, put the template with the polystyrene ball substrate into the vacuum coating machine, and vacuum;

[0075] Step 2, tilting the substrate by 4°, vapor-depositing silver;

[0076] Step 3, after the silver vapor deposition in the step 2 is completed, rotate the substrate by 90° to vapor depo...

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Abstract

The invention belongs to the technical field of metal nano materials, and particularly relates to a chiral nanostructure with adjustable circular dichroism and a preparation method thereof. A primary structure of the chiral nanostructure is an L-shaped structure, a gap exists between the long edge and the short edge of the L-shaped structure, the long edge of the L-shaped structure is made of metal, the short edge of the L-shaped structure is a two-layer structure perpendicular to the long edge, the bottom layer is made of silicon dioxide, and the upper layer is made of metal; the chiral nanostructure with the adjustable circular dichroism is formed by evaporating a medium layer on the long edge or the short edge of the primary structure, namely, the L-shaped structure. According to the chiral nanostructure with the adjustable circular dichroism and the preparation method thereof, the medium layer is added into a simple three-dimensional structure, the circular dichroism is achieved through a normal incidence mode of light, the circular dichroism is regulated and controlled through the position of the medium layer, and different requirements are met; precious metal material cost is greatly lowered, and the experiment cost is lowered; in addition, the chiral nanostructure is simple in preparation process, low in cost, more accurate in measurement signal due to normal incidence and capable of serving as a high-sensitivity biological sensor.

Description

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Claims

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Application Information

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Owner SHAANXI NORMAL UNIV
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