Chiral nanostructure with adjustable circular dichroism and preparation method thereof

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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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.

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