Preparation method and device of chiral multi-lobed microstructure

Abstract

The invention provides a preparation method and device of a chiral multi-pedal microstructure, and belongs to the technical field of the micro-nano manufacturing. The preparation method of the chiralmulti-pedal microstructure comprises the following steps: computing a hologram of the chiral multi-pedal microstructure; processing a photoresist material sample by using a femtosecond holographic processing system according to the hologram to obtain a to-be-developed chiral multi-pedal microstructure sample; placing the to-be-developed chiral multi-pedal microstructure sample in developing liquidto obtain discrete and outward chiral multi-pedal microstructure, wherein the discrete and outward chiral multi-pedal microstructure is inwardly gathered through the capillary force effect of the residual developing liquid on the surface after being taken out from the developing liquid, thereby obtaining the chiral multi-pedal microstructure in a discrete state or assembling state. Through the preparation method and device of the chiral multi-pedal microstructure provided by the invention, the femtosecond laser holographic efficient processing technology and the capillary force driving self-assembling technology are combined to flexibly and quickly realize the preparation of the three-dimensional chiral multi-pedal microstructure, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of micro-nano manufacturing, in particular to a preparation method and device for a chiral multi-lobe microstructure. Background technique [0002] Chirality represents a symmetrical property of an object. A chiral structure means that the structure cannot be completely coincident with its mirror image through rotation or translation. There are many chiral structures in nature, such as amino acids, DNA molecules, hands, shells, spiral galaxies and so on. Chiral structures are also widely used in daily life, such as screws, helical springs, helical stairs, helical blades, helical shafts, and so on. At the micro-nano scale, chiral structures have unique optical response characteristics, and the rapid preparation of diverse chiral micro-nano structures is the cornerstone for studying their optical properties. [0003] With the development of micro-nano processing methods, chiral micro-nano structures can be ...

AI Technical Summary

Problems solved by technology

Relatively speaking, femtosecond laser direct writing has the unique advantage of true three-dimensional processing, and is an ideal chiral micro-nano structure processing method. However, femtosecond laser direct writing requires a single-focus scanning strategy, so the processing efficiency is low, and it needs to be overcome.

As for the bottom-up assembly technology, the main principle is to use chiral materials to induce the formation of chiral micro-nano structures in a liquid-phase environment, but the disadvantage of this type of technology is that the prepared chiral structures can only be attached to the chiral materials. On the other hand, it is difficult to obtain the required hand-shaped structural monomer, and its shape cannot be freely controlled

[0004] The preparation of conventional chiral micro-nano structures is generally achieved independently by using top-down processing technology or bottom-up assembly technology. The prepared structure is generally integral and monochiral, and the size and height of the structure often no control

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