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A dynamically reversible adjustable bichiral nanostructure and its preparation method

A nano-structured, chiral technology, applied in chemical instruments and methods, other chemical processes, vacuum evaporation plating, etc., can solve problems such as high experimental costs, and achieve the effect of reducing experimental costs and consumption.

Inactive Publication Date: 2019-01-01
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 satisfy both left-handed and right-handed chiral structures; in this process, a large amount of precious metal coating materials are required for multiple preparations; these precious metals are generally 99.99% pure Above Au (gold) or Ag (silver), resulting in high experimental cost

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  • A dynamically reversible adjustable bichiral nanostructure and its preparation method
  • A dynamically reversible adjustable bichiral nanostructure and its preparation method

Examples

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Embodiment 1

[0034] A dynamically reversible adjustable bichiral nanostructure, the bottom surface of the structure is L-shaped, the short side of the L-shape is a metal material, and the thickness is 20nm; the long side of the L-shape is a four-layer structure, the bottom layer is a metal material, the thickness The metal material is a gas-sensitive metal material with a thickness of 20nm, and the gas-sensitive metal material is an isolation layer with a thickness of 2nm; the upper layer of the isolation layer is a catalytic layer with a thickness of 2nm.

[0035] In this embodiment, the metal material is Au; the gas-sensitive metal material is Mg; the isolation layer is Ti; and the catalytic layer is Pd.

[0036] The preparation method of the bichiral nanostructure with dynamic reversible adjustment in this embodiment comprises the following steps:

[0037] Step 1, prepare at least five 1cm*2cm glass pieces a and two 1cm*1cm glass pieces b, and clean them up. The specific cleaning proces...

Embodiment 2

[0048] A dynamically reversible adjustable bichiral nanostructure, the bottom surface of the structure is L-shaped, the short side of the L-shape is a metal material, and the thickness is 100nm; the long side of the L-shape is a four-layer structure, the bottom layer is a metal material, the thickness 50nm, above the metal material is a gas-sensitive metal material with a thickness of 100nm, above the gas-sensitive metal material is an isolation layer with a thickness of 8nm; above the isolation layer is a catalytic layer with a thickness of 8nm.

[0049] In this embodiment, the metal material is Ag; the gas-sensitive metal material is Mg; the isolation layer is La; and the catalytic layer is Pd.

[0050] The preparation method is the same as the preparation method in Example 1, the difference is only in step 9: tilt the substrate of the single-layer polystyrene bead template obtained in step 8 by 4°, deposit Ag 50nm, after the Ag deposition is completed, reverse Rotate the su...

Embodiment 3

[0052] A dynamically reversible adjustable bichiral nanostructure, the bottom surface of the structure is L-shaped, the short side of the L-shape is a metal material, and the thickness is 60nm; the long side of the L-shape is a four-layer structure, the bottom layer is a metal material, the thickness The metal material is a gas-sensitive metal material with a thickness of 60nm, and the gas-sensitive metal material is an isolation layer with a thickness of 5nm; the upper layer of the isolation layer is a catalytic layer with a thickness of 5nm.

[0053] In this embodiment, the metal material is Au; the gas-sensitive metal material is a lanthanum-nickel alloy; the isolation layer is La; and the catalytic layer is Pd.

[0054] The preparation method is the same as the preparation method in Example 1, the difference is only in step 9: tilt the substrate of the single-layer polystyrene bead template obtained in step 8 by 4°, deposit Au 30nm, and after the gold deposition is complete...

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Abstract

The invention relates to the technical field of metal nanomaterials, in particular to a dynamic reversible-adjustment bis-chiral nano structure and a preparation method thereof. The dynamic reversible-adjustment bis-chiral nano structure is characterized in that a metal material is obliquely deposited on a template taking polystyrene as base; then the base is rotated by 90 degrees, and the metal material is deposited obliquely; then the base is rotated rightabout by 90 degrees, and a gas-sensitive metal material is obliquely deposited; finally an isolation layer and a catalytical layer are deposited sequentially, and the dynamic reversible-adjustment bis-chiral nano structure is obtained. The gas-sensitive metal material is introduced to the dynamic reversible-adjustment bis-chiral nano structure, the dielectric constant of the gas-sensitive metal material is changed through supplying different gasses, and the chirality of an integral metal chiral nano structure can be changed correspondingly. The metal chiral nano structure having bis-chirality can be prepared simply through one-time preparation, the adjustment can be used repeatedly, the consumption of noble metal materials is reduced substantially, and the experiment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metal nanomaterials, in particular to a dynamically reversible adjustable bichiral 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, and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/29C23C14/20
CPCB01J20/29C23C14/20
Inventor 张中月王勇凯
Owner SHAANXI NORMAL UNIV
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