Method suitable for assembling and reconstructing tiny objects on fluid interface and application of method

A fluid interface, object technology, applied in chemical instruments and methods, liquid/fluid solid measurement, fluid velocity measurement using thermal variables, etc., can solve the structure that cannot be reconfigured and assembled, the application limitations of temperature changes, and the assembly form is difficult to freely adjust and other problems, to achieve the effect of rich and variable assembly patterns and wide application scenarios

Active Publication Date: 2021-02-09
WESTLAKE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of magnetic microfabrication will drive gel particles globally, and cannot independently control individual objects in the assembled structure, that is, the assembled form is still difficult to freely deploy, such as "Sci.Adv.3, e1602522 (2017)"; and Using the temperature response method cannot reconfigure the assembled structure, and the drastic temperature change also limits its application, such as "Adv.Mater.31, 1900932 (2019)"
[0005] All in all, there are still many limitations in the current particle reconstruction and assembly technology on the surface of the liquid surface. In other words, there is currently no assembly method for tiny objects that can freely edit and reconstruct the shape

Method used

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  • Method suitable for assembling and reconstructing tiny objects on fluid interface and application of method
  • Method suitable for assembling and reconstructing tiny objects on fluid interface and application of method
  • Method suitable for assembling and reconstructing tiny objects on fluid interface and application of method

Examples

Experimental program
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Effect test

preparation example 1

[0054] Preparation Example 1: The liquid crystal polymer film was prepared by the photopolymerization method in the in-situ polymerization method. First, mix C9A and DA11AB6 in a molar ratio of 78:20, and then add 2% photoinitiator. After mixing evenly, pour it into a liquid crystal cell made of two substrates. The substrate is coated with an orientation-treated polyimide film, and a spacer material with a certain diameter is placed between the two substrates to maintain a certain distance so as to control the thickness of the liquid crystal polymer composite film. Use a hot stage to control the temperature at 95°C, and when the wavelength emitted by the light source is greater than 550nm, the light intensity is 16mW / cm 2 The reaction was carried out for 6 hours under the light of sunlight, and then the liquid crystal cell was opened to obtain a liquid crystal polymer composite film. Cut the liquid crystal polymer film into various shapes to obtain micro-actuators.

[0055]...

Embodiment 1

[0056] Example 1: Assembly and reconstruction of light-controlled two rectangular micro-actuators:

[0057] Place the two strip-shaped micro-actuators (6mm×2mm×0.03mm in size) obtained in Preparation Example 1 on the air-water interface, and respectively irradiate them with ultraviolet light sources, wherein the light intensity of the ultraviolet light sources is 150-200mW cm -2 .

[0058] Result: if figure 2 Shown:

[0059] 1. When two micro-actuators are bent upward at the same time, the micro-actuators are assembled together in the form of multiple heads or side by side.

[0060] 2. When two micro-actuators are bent downward at the same time, the micro-actuators are assembled together in the form of multiple heads or side by side.

[0061] 3. When one micro-actuator is bent upwards and the other is bent downwards, the micro-actuators are assembled together in a "T" fashion.

Embodiment 2

[0062] Example 2: Assembly and reconstruction of light-controlled three rectangular micro-actuators:

[0063] Repeat the experiment of Example 1, the difference is that three micro-actuators are placed on the liquid surface at the same time, and the assembly pattern is formed by irradiating with ultraviolet light, and further using visible light to return some actuators to the initial state, and then adjusting the irradiation direction of the ultraviolet light source can be adjusted. Assemble the pattern for reconstruction. .

[0064] Result: if image 3 As shown, when three actuators are assembled, nine different assembly patterns can be obtained by adjusting the irradiation direction of the light source.

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Abstract

The invention provides a method suitable for assembling and reconstructing tiny objects on a fluid interface and an application of the method. A liquid interface around an actuator is deformed by utilizing the photoinduced shape change of a tiny object on the liquid level, and the attraction or repulsion force among the actuators is regulated and controlled by utilizing capillary acting force generated by liquid interface deformation induction. Therefore, programmed assembly and reconstruction of the tiny object are realized, patterned assembly and reconstruction can be carried out on a gas-liquid interface, independent assembly and reconstruction can be carried out on a multi-layer liquid interface, and even three-dimensional collaborative assembly can be carried out on the multi-layer liquid interface. The brand-new method has considerable potential application value in the fields of micromechanical systems, biomedical equipment, metamaterials and the like.

Description

technical field [0001] The invention relates to the field of assembly and reconstruction of tiny objects, in particular, it relates to a method of using the light-induced shape change of an actuator on the liquid surface to deform the liquid interface around the tiny object, and using the capillary force induced by the deformation of the liquid interface to regulate multiple Attract or repel each tiny object, so as to realize the programmatic assembly and reconstruction of tiny objects. Background technique [0002] Programmable assembly of tiny objects on liquid surfaces is crucial in many ways, from the fabrication of related functional materials and devices to the fundamental understanding of biological systems. [0003] Capillary interactions between tiny objects and liquid surfaces induce interfacial distortions and generate capillary forces to attract or repel nearby objects, providing a powerful means to assemble objects of various geometries and sizes. However, sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81B3/00B81B1/00
CPCB81B3/0035B81B3/0083B81B1/00
Inventor 吕久安胡志明
Owner WESTLAKE UNIV
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