CN112340691B - Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof - Google Patents
Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof Download PDFInfo
- Publication number
- CN112340691B CN112340691B CN202011252868.2A CN202011252868A CN112340691B CN 112340691 B CN112340691 B CN 112340691B CN 202011252868 A CN202011252868 A CN 202011252868A CN 112340691 B CN112340691 B CN 112340691B
- Authority
- CN
- China
- Prior art keywords
- micro
- objects
- assembled
- tiny
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
- B81B3/0035—Constitution or structural means for controlling the movement of the flexible or deformable elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
- B81B3/0064—Constitution or structural means for improving or controlling the physical properties of a device
- B81B3/0083—Optical properties
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The application provides a method suitable for assembling and reconstructing tiny objects on a fluid interface and application thereof, wherein the deformation of a liquid interface around an actuator is generated by utilizing the photoinduced shape change of the tiny objects on the liquid surface, and the mutual attraction or repulsion force of a plurality of actuators is regulated and controlled by utilizing the capillary force generated by the deformation induction of the liquid interface, so that the programmed assembling and reconstruction of the tiny objects are realized, the patterned assembling and reconstruction on a gas-liquid interface can be realized, the independent assembling and reconstruction on a multi-layer liquid interface can be realized, and even the three-dimensional collaborative assembling on the multi-layer liquid interface can be realized. The novel method has considerable potential application value in the fields of micro-mechanical systems, biomedical equipment, metamaterials and the like.
Description
Technical Field
The application relates to the field of tiny object assembly and reconstruction, in particular to a method for realizing the programmed assembly and reconstruction of tiny objects by utilizing the change of the photoinduced shape of an actuator on a liquid surface to deform a liquid interface around the tiny objects and utilizing capillary force generated by the deformation induction of the liquid interface to regulate and control the mutual attraction or repulsion force of a plurality of tiny objects.
Background
Programmable assembly of tiny objects on a liquid surface is critical in many respects, from the fabrication of related functional materials and devices to the basic understanding of biological systems.
Capillary action between the tiny objects and the liquid surface can cause interface distortions and create capillary forces to attract or repel nearby objects, which provides a powerful means to assemble objects with various geometries and sizes. However, since the capillary interactions of an object are determined by the chemical composition and geometry of its surface, in most of the past studies, capillary interactions are generally used to assemble objects of a fixed shape, self-assembly of set conditions taking place once the object is placed on the surface of a liquid, and the final assembly shape is determined by the initial position of the dispersed object.
To date, achieving programmable assembly and reconfiguration of floating systems has remained a challenge due to the difficulty in dynamically adjusting capillary interactions between dispersed objects. Recently, efforts have been made to develop a programmed capillary force assembly technique using magnetic micro-processing or gradient expansion of temperature-responsive three-dimensional (3D) shaped hydrogels. However, the use of magnetic micro-technology drives the gel particles globally, and individual objects in the assembled structure cannot be controlled independently, i.e. the assembled form is still difficult to freely formulate, such as sci.adv.3, e1602522 (2017); the assembled structure cannot be reconfigured by using a temperature responsive manner, and the severe temperature variation also limits its application, such as adv.
In summary, there are still many limitations on the conventional fine particle reconstruction assembly technique for the surface of the liquid, in other words, there is no method for assembling a fine object capable of freely editing the reconstruction shape.
However, the present patent provides a bio-heuristic strategy to achieve reconfigurable assembly of two-dimensional and three-dimensional structures at the fluid interface. The deformation of the floating azobenzene functionalized liquid crystal polymer actuator is regulated by a simple and programmable light control method, thereby generating capillary force to drive assembly and reconstruction
Disclosure of Invention
The application aims to provide a method suitable for assembling and reconstructing a tiny object on a fluid interface and application thereof, which realizes two-dimensional and three-dimensional assembling of the tiny object on the fluid interface based on a biological heuristic strategy, and adjusts the deformation of a floating azobenzene functional liquid crystal polymer actuator in a simple and programmable light control mode to generate capillary force to drive the assembling and reconstructing of the actuator, so as to form different patterns.
The inventor has made extensive and intensive studies on the use of a photo-deformable intelligent polymer material to prepare micro-actuators, and by using the property that the micro-actuators can change shape under the stimulation of light, the micro-actuators are illuminated to bend upwards or downwards on the liquid surface to generate a convex liquid surface or a concave liquid surface, and the deformation-induced capillary force is used to regulate the micro-actuators to realize mutual attraction or mutual repulsion, so as to regulate the assembly or reconstruction of a plurality of actuators into different patterns. Different from the magnetic micro process, the scheme can independently regulate and control a single micro actuator, further can assemble different pattern shapes by matching with different regulation and control strategies, and can regulate and control the incidence position and angle of light randomly at any time to regulate and control the micro actuator to generate different shape changes, thereby conveniently carrying out mutual switching of different patterns. In addition, the mode not only can regulate and control a plurality of micro-actuators on the same liquid level, but also can simultaneously assemble a plurality of actuators on a plurality of layers of liquid levels, thereby realizing three-dimensional cooperative assembly.
To achieve the above object, in particular, according to a first aspect of the present application, there is provided a method for assembling tiny objects on a fluid interface, in this embodiment, the tiny objects refer to all objects capable of bending and deforming under illumination, including the following steps:
the tiny objects on the fluid interface are irradiated by light to deform so as to induce the deformation of the liquid level and form capillary force to drive the tiny objects to be assembled.
In the embodiment of the present disclosure, the micro-object may be selected as a micro-actuator, where the micro-actuator is obtained by cutting a liquid crystal polymer film with an illumination bending property, and the polymer film can be bent and deformed under illumination, and can be bent in different directions when being illuminated on different surfaces. The shape of the micro-actuator can be triangle, square, rectangle, circle, ellipse or polygon.
The liquid crystal polymer film can be made of reversible photoinduced deformation liquid crystal polymers mentioned in CN102615885B, but the characteristics of the liquid crystal polymer films prepared from different materials are slightly different. In the examples of the present embodiment, the present inventors prepared the liquid crystal polymer film in the following manner:
the preparation method adopts an in-situ polymerization method: firstly, C9A and DA11AB6 are mixed according to the molar ratio of 78:20, then 2 percent of photoinitiator is added, and the mixture is injected into a liquid crystal box made of two substrates after uniform mixing. The substrate is coated with polyimide film subjected to orientation treatment, and a certain diameter of spacer material is placed between two substrates to maintain a certain spacing for controlThe thickness of the liquid crystal polymer composite film is controlled at 95 ℃ by a heat table, the wavelength emitted by a light source is more than 550nm, and the light intensity is 16mW/cm 2 And (3) reacting for 6 hours under the illumination of the light, and then opening the liquid crystal box to obtain the liquid crystal polymer composite film. .
Wherein the thickness of the liquid crystal polymer film is 0.1 μm to 2000 μm. Preferably, the liquid crystal polymer film is cut into an actuator having a length of 0.1mm to 100mm and a width of 0.1mm to 100 mm.
As shown in fig. 1A, the tiny object does not cause a change of the solid interface when bending to light on the gas-solid interface, and the tiny object is not influenced by the solid interface itself; as shown in fig. 1B, when the micro-object is bent upward at the gas-liquid interface, the bent portion of the micro-object is recessed on the surface of the liquid surface to form a concave liquid surface, and correspondingly, a convex liquid surface is generated at the side of the concave liquid surface, so as to induce different capillary forces.
In an embodiment of the present disclosure, at least two tiny objects are placed on at least a plurality of layers of liquid surfaces, where at least two layers of liquid surfaces are provided with tiny objects, and illumination is applied to the tiny objects on the plurality of layers of liquid surfaces, so as to enable the tiny objects to be assembled independently or cooperatively on the plurality of layers of liquid surfaces, at this time, three-dimensional cooperative assembly on the plurality of layers of liquid surfaces can be achieved, at this time, when the light intensity is high, the tiny objects placed on the lower layer puncture the upper layer of liquid surface, and then three-dimensional cooperative assembly is spontaneously formed. Correspondingly, the multi-layer liquid level is a gas-liquid and liquid-liquid interface, or a liquid-liquid and liquid-liquid interface.
Of course, if a plurality of tiny objects are placed on the same-layer gas-liquid interface, two-dimensional cooperative assembly is realized.
It is particularly preferable that the light intensity of the illumination is controlled to be 0.001-10W/cm -2 In addition, it should be noted that the method can control the assembly rate by controlling the intensity of the light source to adjust the bending curvature of the micro-actuator by controlling the intensity of the light source.
In addition, the application range of the scheme is wide, namely, the requirement on the assembled environment condition is low. The gas in the gas-liquid interface of the scheme is air, nitrogen and argon; the liquid is water, silicone oil, fluoridation liquid and salt solution. The light source is any one of ultraviolet light, visible light, red light and near infrared light. Changing the irradiation direction of the light source to control the bending direction of the tiny objects, wherein the light source can irradiate from top to bottom, and at the moment, the tiny objects bend upwards; if the light source irradiates from bottom to top, the photo-deformable micro-controller bends downward.
The two micro objects are adjacently arranged, wherein the placement position between the micro objects can have a certain influence on the final assembly form, as shown in fig. 12, the assembly form is always head-to-head connection after illumination when the initial positions of the two actuators are head-to-head connection, and two assembly modes of head-to-head and side-by-side appear when the initial positions of the two actuators are parallel, the assembly modes are related to a distance d, the two assembly modes are connected in a head-to-head mode when d is larger than a critical distance, the two assembly modes are assembled in a side-by-side mode when d is smaller than the critical distance, and the two actuators are assembled together in a T-shaped mode when the light source irradiates towards opposite directions when one of the two actuators is bent upwards and the other one of the two actuators is bent downwards.
According to a second aspect of the present application, there is provided a method for reconstructing a tiny object on a fluid interface, in an embodiment of the present application, the tiny object is a micro-actuator, and the micro-actuator is deformed by bending light, including the following steps:
specifically, at least two micro objects are placed on a gas-liquid interface, the illumination direction of ultraviolet light is determined according to the shape of an assembly pattern, and the self-assembly of the micro objects corresponding to the ultraviolet light illumination is completed; changing the illumination direction of ultraviolet light, irradiating the corresponding micro object by the ultraviolet light to induce the assembled pattern of the assembled micro object to change, and adjusting the irradiation direction and intensity of the light source to induce the micro object to form a specific assembled pattern.
Specifically, at least two micro objects are placed on a gas-liquid interface, the illumination direction of ultraviolet light is determined according to the shape of an assembly pattern, and the self-assembly of the micro objects corresponding to the ultraviolet light illumination is completed; switching the light source to at least one micro object assembled by visible light irradiation, so that the micro object is restored to an initial state; and determining the illumination direction of the ultraviolet light according to the shape of the reconstructed image, and illuminating the corresponding tiny object by the ultraviolet light.
It should be noted that, for the actuator, the light source driving the actuator to bend is an ultraviolet light source, when the actuator is reconfigured, the irradiation direction of the ultraviolet light source is adjusted after the actuator is returned to an original state by irradiation of visible light, and the different light sources are made of different materials, so that the method has strong universality, not only for the actuator prepared from the material, but also for other actuators with response, the actuator can be assembled and reconfigured by using the method.
Similarly, three-dimensional reconstruction can also be achieved on a multilayer liquid surface, in which case:
placing at least two tiny objects on at least a plurality of layers of liquid surfaces, wherein the tiny objects are arranged on the at least two layers of liquid surfaces, determining the illumination direction of ultraviolet light for the tiny objects on the plurality of layers of liquid surfaces according to the shape of the assembly pattern, and completing self-assembly of the tiny objects corresponding to the ultraviolet light illumination; changing the illumination direction of ultraviolet light, irradiating corresponding micro objects by the ultraviolet light to induce the assembled micro object assembly patterns to change, and adjusting the irradiation direction and intensity of the light source to induce the micro objects to form specific assembly patterns.
More specifically, in some embodiments, the switching light source irradiates at least one assembled tiny object with visible light, so that the tiny object is restored to an initial state; and determining the illumination direction of the ultraviolet light according to the shape of the reconstructed image, and illuminating the corresponding tiny object by the ultraviolet light.
The assembly conditions mentioned in the method of reconstructing the liquid-interface photo-controlled minute object are the same as those in the method of assembling the liquid-interface photo-controlled minute object thereon.
According to a third aspect of the present application there is provided a co-assembled miniature object assembled according to a method thereon suitable for assembling miniature objects on a fluid interface.
According to a fourth aspect of the present application there is provided a co-assembled micro-object, reconstituted according to a method thereon adapted for reconstruction of micro-objects at a fluid interface.
It is understood that within the scope of the present application, the above-described technical features and technical features described in detail below (e.g., in the examples) may be combined with each other to form new or preferred technical solutions. And are limited to a space, and are not described in detail herein.
Compared with the prior art, the technical scheme has the following characteristics:
1. the single micro-actuator is driven to deform and change in a light-operated mode, so that the assembly and reconstruction of a plurality of micro-actuators are realized, the deformation of the micro-actuators can be changed by adjusting the position and angle of incident light, the free reconstruction of the micro-actuators is realized, and the allocation mode is simple and easy to operate and has low requirements on environment.
2. The application scene is wide, and the assembly patterns are rich and changeable. The scheme can be carried out on various gas-liquid interfaces, the gas can be air, nitrogen or argon, the liquid can be water, silicone oil, fluoridized liquid, salt solution and the like, and the method can be applied to the fields of optical mechanical systems, collaborative micro robots, biomedical equipment, assembly of layered systems, material engineering from bottom to top and the like.
3. Not only can the assembly and reconstruction of the two-dimensional image be realized, but also the assembly and reconstruction of the three-dimensional image can be realized, namely, the assembly of a plurality of actuators on the multi-layer liquid level can be realized, so that the three-dimensional cooperative assembly among the multi-layer liquid level can be realized.
Drawings
FIG. 1A is a graph of the deformation of a micro-actuator at a solid interface.
FIG. 1B is a graph of the deformation of a liquid surface induced by a micro-actuator when the micro-actuator is on a liquid surface, resulting in a concave surface and a convex surface.
Fig. 2 is a schematic illustration of two rectangular light-operated micro-actuators assembled and reconfigured above a liquid surface under light stimulation according to one embodiment of the present application.
Fig. 3 is a schematic view of three rectangular light-operated micro-actuators assembled and reconfigured above a liquid surface under light stimulation according to one embodiment of the present application.
Fig. 4 is a schematic view of four rectangular light-operated micro-actuators assembled and reconfigured above a liquid surface under light stimulation according to one embodiment of the present application.
Fig. 5 is a schematic illustration of the assembly and reconstruction of nine rectangular light-operated micro-actuators on a liquid surface under light stimulation, according to an embodiment of the present application.
Fig. 6 is a schematic diagram of four square light-operated micro-actuators assembled and reconfigured above a liquid surface under light stimulation according to one embodiment of the application.
Fig. 7 is a schematic illustration of two triangular light-operated micro-actuators assembled and reconfigured above a liquid surface under light stimulation in accordance with an embodiment of the present application.
Fig. 8 is a schematic illustration of the reversible and repeatable patterned assembly of four rectangular light-operated micro-actuators on a liquid surface under light stimulation, according to one embodiment of the application.
Fig. 9 is a schematic illustration of patterned assembly and reconstruction of differently shaped optically controlled micro-actuators on a liquid surface under optical stimulation, according to one embodiment of the application.
Fig. 10 is a schematic diagram of a rectangular light-operated micro-actuator patterned assembly and reconstruction on a multi-layer liquid surface under light stimulation according to one embodiment of the application.
Fig. 11 is a schematic diagram of a rectangular light-operated micro-actuator cooperatively assembled and reconfigured on a multi-layer fluid surface under light stimulation in accordance with one embodiment of the present application.
Fig. 12 is a schematic view showing the effect of the placement position between the minute objects on the final assembled form according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Through extensive and intensive research, the inventor prepares a micro actuator by utilizing a photoinduced deformation intelligent high polymer material, utilizes the characteristic that the micro actuator can change shape under the stimulation of light, places the actuator in a liquid interface to deform and induce capillary force, and regulates a plurality of actuators to generate attractive force or repulsive force by utilizing the capillary force, thereby realizing the assembly of patterns in different shapes. The technology of the application not only can drive the micro-actuator to assemble and reconstruct at a single interface, but also can drive the micro-actuator to assemble and reconstruct at a multi-layer interface, and even can drive the micro-actuator to cooperatively assemble and reconstruct at the multi-layer interface. The method is a brand new method for assembling and reconstructing the light-operated micro-actuator, and has considerable potential application value in the fields of micro-mechanical systems, biomedical equipment, metamaterials and the like.
The following embodiments will be described with reference to the micro-actuator as an example, but of course, other micro-objects with deformable light have similar effects.
Preparation example 1: and preparing the liquid crystal polymer film by adopting an in-situ polymerization method. C9A and DA11AB6 are firstly mixed according to the molar ratio of 78:20, and then 2% of photoinitiator is added. And (3) uniformly mixing and then injecting the mixture into a liquid crystal box made of two substrates. The polyimide film subjected to orientation treatment is coated on the substrateAnd a certain diameter of spacing material is arranged between the two substrates to keep a certain interval so as to control the thickness of the liquid crystal polymer composite film. Controlling the temperature at 95deg.C with a heat stage, and emitting light with wavelength of more than 550nm and light intensity of 16mW/cm 2 And (3) reacting for 6 hours under the illumination of the light, and then opening the liquid crystal box to obtain the liquid crystal polymer composite film. Cutting the liquid crystal polymer film into various shapes to obtain the micro actuator.
The assembly and reconstruction schemes of the different embodiments are described below with reference to the accompanying drawings:
example 1: light-operated two rectangle micro-actuator equipment and reconfiguration:
the two elongated micro-actuators (size of 6 mm. Times.2 mm. Times.0.03 mm) obtained in preparation example 1 were placed on an air-water interface, and irradiated with ultraviolet light sources each having an intensity of 150-200mW cm -2 。
Results: as shown in fig. 2:
1. when two micro-actuators are simultaneously bent upwards, the micro-actuators are assembled together in a head-to-head or side-by-side fashion.
2. When two micro-actuators are simultaneously bent downward, the micro-actuators are assembled together in a head-to-head or side-by-side fashion.
3. When one micro-actuator is bent upward and the other is bent downward, the micro-actuators are assembled together in a "T" fashion.
Example 2: light-operated three rectangle micro-actuator assembly and reconstruction:
the experiment of example 1 was repeated except that three micro-actuators were placed simultaneously on the liquid surface, and the assembled pattern was formed by irradiation with ultraviolet light, and further the assembled pattern was reconfigured by adjusting the irradiation direction of the ultraviolet light source after returning part of the actuators to the original state by irradiation with visible light. .
Results: as shown in fig. 3, when three actuators are assembled, 9 different assembly patterns are obtained by adjusting the irradiation direction of the light source.
Example 3: light-operated four rectangle micro-actuator assembly and reconstruction:
the experiment of example 1 was repeated except that four micro-actuators were simultaneously placed on the liquid surface, and the assembled pattern was formed by irradiation with ultraviolet light, and further the assembled pattern was reconfigured by adjusting the irradiation direction of the ultraviolet light source after returning part of the actuators to the original state by irradiation with visible light.
Results: when four actuators are assembled, adjusting the illumination direction of the light source results in 25 different assembly patterns as shown in fig. 4.
Example 4: light-operated nine rectangular micro-actuators are assembled and reconstructed:
the experiment of example 1 was repeated except that nine micro-actuators were placed simultaneously on the liquid surface, and the assembled pattern was formed by irradiation with ultraviolet light, and further, the assembled pattern was reconfigured by adjusting the irradiation direction of the ultraviolet light source after returning part of the actuators to the original state by irradiation with visible light.
Results: when four actuators were assembled, adjusting the illumination direction of the light source resulted in 37 different assembly patterns shown in fig. 5.
From examples 1 to 4, it is understood that different assembly patterns can be combined by selecting different numbers of micro-actuators and performing light treatment on any micro-actuator therein.
Example 5: light-operated four square micro-actuator assembly and reconstruction
Four square micro-actuators (with the dimensions of 3mm multiplied by 0.03 mm) obtained in preparation example 1 are placed on an air-water interface, an assembly pattern is formed by ultraviolet light irradiation, and the assembly pattern can be reconstructed by adjusting the irradiation direction of an ultraviolet light source after the partial actuators are returned to an initial state by further irradiation with visible light.
Results: when four actuators are assembled, adjusting the illumination direction of the light source results in 4 different assembly patterns as shown in fig. 6.
Example 6: light-operated two triangle micro-actuator assembly and reconstruction
The two triangular micro-actuators (with the size of 3mm multiplied by 0.03 mm) obtained in preparation example 1 are placed on an air-water interface, an assembly pattern is formed by ultraviolet irradiation, and the assembly pattern can be reconstructed by adjusting the irradiation direction of an ultraviolet light source after the partial actuators are restored to the initial state by further irradiation of visible light.
Results: when four actuators are assembled, adjusting the illumination direction of the light source results in 3 different assembly patterns shown in fig. 7.
As can be seen from example 3, example 5 and example 6, the shape of the micro-actuator is not required in this embodiment, and the micro-actuator may be triangular, square or rectangular, although other polygons are also possible.
Example 7: reversible and repeatable assembly of light-operated micro-actuator on liquid surface under light stimulation
The four rectangular micro-actuators obtained in preparation example 1 are placed on an air-water interface, ultraviolet light is used for irradiation to form an assembled pattern, and further visible light is used for irradiation to restore part of the actuators to an initial state, and then the irradiation direction of an ultraviolet light source is adjusted to reconstruct the assembled pattern.
Results: when four actuators are assembled, the irradiation direction of the light source is adjusted so that the assembled pattern is repeatedly and reversibly assembled between the straight shape and the I shape. The pattern change is shown in fig. 8. This embodiment demonstrates that the solution is reversible for deformation control of the micro-actuator, and further allows for subsequent reconstruction.
Example 8: light-operated micro-actuator assembly and reconstruction in different shapes
The two triangular micro-actuators (with the size of 3mm×0.03 mm) and the two elongated micro-actuators (with the size of 6mm×2mm×0.03 mm) obtained in preparation example 1 were placed on an air-water interface, and were irradiated with ultraviolet light to form an assembly pattern, and further, after the partial actuators were returned to the initial state by irradiation with visible light, the irradiation direction of the ultraviolet light source was adjusted to reconstruct the assembly pattern. .
Results: when the micro-actuators of different shapes are assembled, the irradiation direction of the light source is adjusted so as to resemble an arrow-shaped pattern. The pattern change is shown in fig. 9.
Example 9: patterning assembly and reconstruction of light-operated micro-actuator on multi-layer liquid level
The fluorinated liquid (FC-70) was first poured into a petri dish and then added with the appropriate amount of water to form the liquid-gas multi-layer interface. Three elongated micro-actuators (size 6 mm. Times.2 mm. Times.0.03 mm) obtained in preparation example 1 were placed on a liquid-liquid interface, two triangular micro-actuators (size 3 mm. Times.0.03 mm) and one rectangular micro-actuator (size 6 mm. Times.2 mm. Times.0.03 mm) were placed on a gas-liquid interface, and an assembly pattern was formed by irradiation with ultraviolet light, and further, after a part of the actuators was returned to an initial state by irradiation with visible light, the irradiation direction of the ultraviolet light source was adjusted to reconstruct the assembly pattern.
Results: by adjusting the irradiation direction of the light source, the assembly pattern on each interface can be individually controlled, and the specific pattern is shown in fig. 10.
Example 10: the light-operated rectangular micro-actuator is cooperatively assembled and reconstructed on the multilayer liquid level:
a multi-layer interface is constructed by the method of the embodiment 9, wherein the interface is in the form of gas-liquid, two rectangular micro-actuators with the dimensions of (6 mm multiplied by 2mm multiplied by 0.03 mm) and one rectangular micro-actuator with the dimensions of (12 mm multiplied by 2mm multiplied by 0.03 mm) are placed on the liquid-liquid interface, two rectangular micro-actuators with the dimensions of (6 mm multiplied by 2mm multiplied by 0.03 mm) are placed on the gas-liquid interface, an assembly pattern is formed by ultraviolet irradiation, and the assembly pattern can be reconstructed by further adjusting the irradiation direction of an ultraviolet light source after the partial actuators are returned to an initial state by irradiation of visible light.
Results: the micro-actuator cooperative assembly between the liquid-liquid interface and the gas-liquid interface can be realized by adjusting the irradiation direction of ultraviolet light, and meanwhile, different patterns can be converted, and the specific pattern conversion is shown in fig. 11.
The present application is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present application can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present application fall within the scope of the present application.
Claims (10)
1. A method for assembling tiny objects on a fluid interface is characterized in that the tiny objects on the fluid interface are irradiated to deform to induce the deformation of a liquid level and form capillary force to drive the tiny objects to be assembled, wherein the tiny objects can bend and deform all objects under illumination, when a light source irradiates two tiny objects in the same direction, when the initial positions of the two tiny objects are connected end to end, the assembled form after illumination is always connected end to end, and when the initial positions of the two tiny objects are parallel, two assembly modes of end to end and side to side can occur; when the light source irradiates two tiny objects in opposite directions, the tiny objects are assembled in a T-shaped manner.
2. The method for assembling a small object on a fluid interface according to claim 1, comprising the steps of: at least two tiny objects are arranged on a gas-liquid interface, and the tiny objects are irradiated by light to generate bending deformation to induce the deformation of the liquid level, and capillary force is formed to drive the tiny objects to be assembled.
3. The method of claim 1, wherein at least two micro-actuators are placed on the multi-layer surface, wherein at least two layers of the surface are provided with micro-objects, and wherein illumination of the micro-objects on the multi-layer surface causes the micro-objects to be independently assembled or cooperatively assembled on the multi-layer surface.
4. A method for assembling small objects on a fluid interface according to claim 3, wherein the multi-layer fluid level is a gas-liquid interface or a liquid-liquid interface.
5. The method for assembling a small object on a fluid interface according to claim 1, wherein the irradiation direction of the light source is changed to control the bending direction of the small object, such as the light source irradiates from top to bottom, and the small object bends upward; if the light source irradiates from bottom to top, the tiny objects bend downwards.
6. The method for assembling small objects on a fluid interface according to claim 1, wherein the gas in the gas-liquid interface is air, nitrogen, argon, and the liquid is water, silicone oil, fluorinated liquid, or salt solution; the light source is any one of ultraviolet light, visible light, red light and near infrared light.
7. A co-assembled micro-object, characterized in that it is assembled according to the method of any one of claims 1 to 6 above, which is suitable for the assembly of micro-objects on a fluid interface.
8. A method for reconstructing a tiny object on a fluid interface, wherein the tiny object is a tiny object capable of bending deformation under illumination, comprising the following steps: placing at least two micro-actuators on a gas-liquid interface, determining the illumination direction of ultraviolet light according to the shape of an assembly pattern, and completing self-assembly of micro objects corresponding to ultraviolet light illumination according to the method for assembling the micro objects on the fluid interface as set forth in any one of claims 1 to 6; changing the illumination direction of ultraviolet light, irradiating the corresponding micro object by the ultraviolet light to induce the assembled pattern of the assembled micro object to change, and adjusting the irradiation direction and intensity of the light source to induce the micro object to form a reconstructed assembled pattern.
9. The method for reconstructing a microscopic object at a fluid interface according to claim 8, comprising the steps of: placing at least two tiny objects on at least a plurality of layers of liquid surfaces, wherein the tiny objects are arranged on the at least two layers of liquid surfaces, determining the illumination direction of ultraviolet light for the tiny objects on the plurality of layers of liquid surfaces according to the shape of the assembly pattern, and completing self-assembly of the tiny objects corresponding to the ultraviolet light illumination; changing the illumination direction of ultraviolet light, irradiating the corresponding micro object by the ultraviolet light to induce the assembled pattern of the assembled micro object to change, and adjusting the irradiation direction and intensity of the light source to induce the micro object to form a reconstructed assembled pattern.
10. A co-assembled micro-object, characterized in that it is reconstituted according to a method suitable for the reconstitution of micro-objects at a fluid interface according to claim 8 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011252868.2A CN112340691B (en) | 2020-11-11 | 2020-11-11 | Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011252868.2A CN112340691B (en) | 2020-11-11 | 2020-11-11 | Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112340691A CN112340691A (en) | 2021-02-09 |
| CN112340691B true CN112340691B (en) | 2023-08-22 |
Family
ID=74363248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011252868.2A Active CN112340691B (en) | 2020-11-11 | 2020-11-11 | Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112340691B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410649B (en) * | 2021-06-18 | 2022-04-12 | 电子科技大学 | Optical-mechanical structural reflection type beam-controllable microwave super surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6507989B1 (en) * | 1997-03-13 | 2003-01-21 | President And Fellows Of Harvard College | Self-assembly of mesoscale objects |
| JP2009283264A (en) * | 2008-05-22 | 2009-12-03 | National Institute Of Advanced Industrial & Technology | Micro topography switch array |
| JP2010068691A (en) * | 2008-09-12 | 2010-03-25 | Tokyo Institute Of Technology | Optical-driving actuator, its manufacturing method, and power transfer system |
| CN102990644A (en) * | 2012-11-30 | 2013-03-27 | 电子科技大学 | Photo-induced bending conductive actuator and manufacturing method thereof |
| CN110176541A (en) * | 2019-06-09 | 2019-08-27 | 苏州大学 | A kind of vulcanized lead Colloidal Quantum Dots solar battery and preparation method based on convection current assembling sedimentation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7520933B2 (en) * | 2006-08-30 | 2009-04-21 | Korea Advanced Institute Of Science And Technology | Method for manufacturing colloidal crystals via confined convective assembly |
| WO2012061138A2 (en) * | 2010-10-25 | 2012-05-10 | The Johns Hopkins University | Curved and flexible microfluidics |
| US11046887B2 (en) * | 2018-03-21 | 2021-06-29 | Korea Advanced Institute Of Science And Technology | Photonic crystal comprising photo-responsive molecules and method of preparing the same |
-
2020
- 2020-11-11 CN CN202011252868.2A patent/CN112340691B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6507989B1 (en) * | 1997-03-13 | 2003-01-21 | President And Fellows Of Harvard College | Self-assembly of mesoscale objects |
| JP2009283264A (en) * | 2008-05-22 | 2009-12-03 | National Institute Of Advanced Industrial & Technology | Micro topography switch array |
| JP2010068691A (en) * | 2008-09-12 | 2010-03-25 | Tokyo Institute Of Technology | Optical-driving actuator, its manufacturing method, and power transfer system |
| CN102990644A (en) * | 2012-11-30 | 2013-03-27 | 电子科技大学 | Photo-induced bending conductive actuator and manufacturing method thereof |
| CN110176541A (en) * | 2019-06-09 | 2019-08-27 | 苏州大学 | A kind of vulcanized lead Colloidal Quantum Dots solar battery and preparation method based on convection current assembling sedimentation |
Non-Patent Citations (1)
| Title |
|---|
| Hyunki Kim等."Light-dirven Shape Morphing,Assembly,and Motion of Nanoomposite Gel Surfers".《ADVANCED AMTERIALS》.2019,第31卷(第27期),第1-7页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112340691A (en) | 2021-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nocentini et al. | Optically driven soft micro robotics | |
| Palagi et al. | Light‐controlled micromotors and soft microrobots | |
| Lv et al. | Humidity-responsive actuation of programmable hydrogel microstructures based on 3D printing | |
| Luo et al. | Magnetically actuated dynamic iridescence inspired by the neon tetra | |
| Aranson | Active colloids | |
| Chen et al. | Light-powered micro/nanomotors | |
| Rajabasadi et al. | 3D and 4D lithography of untethered microrobots | |
| Dai et al. | Integrated assembly and flexible movement of microparts using multifunctional bubble microrobots | |
| Zhang et al. | Spiropyran-decorated SiO2–Pt Janus micromotor: Preparation and light-induced dynamic self-assembly and disassembly | |
| Zhao et al. | Bio-inspired variable structural color materials | |
| Maruo et al. | Force-controllable, optically driven micromachines fabricated by single-step two-photon microstereolithography | |
| RU2007131686A (en) | MICROFLUIDAL SYSTEMS BASED ON EXECUTIVE ELEMENTS | |
| CN112340691B (en) | Method suitable for assembling and reconstructing tiny objects on fluid interface and application thereof | |
| Zhang et al. | Metachronal μ-cilia for on-chip integrated pumps and climbing robots | |
| US20150093823A1 (en) | Environmentally Responsive Microstructured Hybrid Actuator Assemblies For Use in Mechanical Stimulation of Cells | |
| Dai et al. | 2D to 3D manipulation and assembly of microstructures using optothermally generated surface bubble microrobots | |
| Park et al. | Programmable stepwise collective magnetic self-assembly of micropillar arrays | |
| Ge et al. | Controlled group motion of anisotropic Janus droplets prepared by one-step vortex mixing | |
| Chen et al. | Near-infrared light-driven controllable motions of gold-hollow-microcone array | |
| KR100928057B1 (en) | Super water-repellent surface modification method using ultrafast laser | |
| Yang et al. | Femtosecond laser regulated ultrafast growth of mushroom-like architecture for oil repellency and manipulation | |
| Joyee et al. | Magnetic field-assisted stereolithography for productions of multimaterial hierarchical surface structures | |
| Zhang et al. | Functional shape-morphing microarchitectures fabricated by dynamic holographically shifted femtosecond multifoci | |
| WO2008097502A1 (en) | Massively parallel assembly of composite structures using depletion attraction | |
| Xiong et al. | Divalent multilinking bonds control growth and morphology of nanopolymers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |