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A kind of preparation method of chiral metal micro-nano helical structure

A technology of helical structure and metal, applied in the field of preparation of chiral metal micro-nano structure, can solve the problems of complicated and complicated preparation process of metal micro-nano helical structure

Active Publication Date: 2020-10-27
山东未来城建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the cumbersome and complicated preparation process of the metal micro-nano helical structure existing in the prior art, the present invention provides a preparation method of the chiral metal micro-nano helical structure. The metal micro-nano helical structure is prepared by the method, and the detection method is simple, convenient and easy to operate

Method used

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  • A kind of preparation method of chiral metal micro-nano helical structure
  • A kind of preparation method of chiral metal micro-nano helical structure
  • A kind of preparation method of chiral metal micro-nano helical structure

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Embodiment 1

[0048] A method for preparing a chiral metal micro-nano helical structure, characterized in that: the metal micro-nano helical structure is based on polystyrene spheres, and an insulating material is cyclically rotated and tilted clockwise or counterclockwise on the substrate. , form a spiral structure, and then vertically vapor-deposit a metal material on the spiral structure to form a metal spiral structure. The insulating material is silicon dioxide, and the metal material is gold or silver.

[0049] The preparation method of the above-mentioned chiral metal micro-nano helical structure comprises the following steps:

[0050] Step 1, prepare a single-layer polystyrene bead template;

[0051] In step 2, the prepared single-layer polystyrene bead template is adhered to the substrate with double-sided adhesive, placed on the sample stage of the vacuum coating machine, the electron beam evaporation coating machine is turned off, and vacuum is drawn;

[0052] Specifically: whe...

Embodiment 2

[0068] The preparation steps of this embodiment are basically the same as those of Embodiment 1, and the difference is only in the coating method in step 3. The specific coating process of step 3 in the preparation method of this embodiment is as follows:

[0069] First, set the deposition angle to 4°, vapor-deposit 5nm of insulating material at the No. 1 position, and then rotate the azimuth angle 120° clockwise to vapor-deposit 5nm of insulating material. This cycle is repeated 5 times, that is, 3-2 - The sequence of 1-3-2 positions is cyclically evaporated for 5 times, and the first layer of evaporation is completed, forming a similar triangular structure with end points connected;

[0070] Secondly, continue to evaporate on the basis of the first layer, rotate the azimuth angle clockwise by 240°, evaporate the insulating material 5nm at the 3rd position, then rotate the azimuth angle clockwise by 120°, and evaporate the insulating material at the 2nd position 5nm; Recycle ...

Embodiment 3

[0075] A kind of preparation method of chiral metal micro-nano helical structure proposed in embodiment 1 and 2, wherein the process of preparing monolayer polystyrene bead template in step 1 is as follows:

[0076] Step 1: Prepare a glass piece a and two pieces of glass piece b, the widths of the glass piece a and the glass piece b are not more than 1cm, and clean them. minutes, rinse the acetone with deionized water, ultrasonicate with alcohol for 15 minutes, rinse the alcohol with deionized water, and put it in deionized water for later use;

[0077] Step 2: Stack the two cleaned glass sheets b into a petri dish, and pour deionized water into the petri dish, and the deionized water level is lower than the upper surface of the upper glass sheet b;

[0078] Step 3: Mix the polystyrene pellet suspension with alcohol, put it into the sample tube and sonicate for 3 minutes,

[0079] A mixed solution of polystyrene beads and alcohol is obtained, the diameter of the polystyrene b...

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Abstract

The invention relates to the field of preparation of a chiral metal micro-nano structure, and particularly relates to a preparation method of a chiral metal micro-nano-spiral structure, wherein the metal micro-nano-spiral structure takes polystyrene spheres as a substrate, an inclined evaporation insulating material is rotated clockwise or counterclockwise on the substrate to form a spiral structure, and then a metal material is perpendicularly evaporated on the spiral structure to finally form a metal spiral structure. The preparation method is simple and easy to operate, has low requirementsfor experimental equipment, and the prepared chiral metal micro-nano-spiral structure is strong in circular dichroism signal.

Description

technical field [0001] The invention belongs to the field of preparation of chiral metal micro-nano structures, in particular to a preparation method of a chiral metal micro-nano helical structure. Background technique [0002] Chirality refers to the property that the structure and its mirror-image enantiomers cannot be perfectly superimposed. Chirality is the basic characteristic of the life process, and most of the organic molecules that constitute living organisms are chiral molecules. Circular dichroism is an important means to study chirality. [0003] The circular dichroism signal of chiral molecules in nature is very weak, which is not conducive to practical signal detection and application in biomedicine and pharmaceuticals. Metal nanostructures exhibit stronger circular dichroism due to surface plasmon interactions due to stronger interactions between metals and light, as described in the paper "Mario Hentschel, Martin Schaferling, Thomas Weiss, NaLiu, and Harald...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/30C23C14/10C23C14/18B82Y40/00
CPCB82Y40/00C23C14/10C23C14/18C23C14/225C23C14/30
Inventor 刘凯王天堃李敖
Owner 山东未来城建筑工程有限公司
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