CN112724438A

CN112724438A - Self-assembly preparation method and device of colloidal microsphere single-layer film

Info

Publication number: CN112724438A
Application number: CN202110079185.XA
Authority: CN
Inventors: 闫卫国; 苏兴杰; 罗春丽
Original assignee: Tianjin Chengjian University
Current assignee: Tianjin Chengjian University
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-04-30

Abstract

The invention discloses a self-assembly preparation method and a self-assembly preparation device of a colloidal microsphere single-layer film. Including basin, glass piece, Arduino controller, battery, miniature water pump, relay, bee calling organ, water pipe, bread board, level sensor and control button. Specifically, the invention provides a self-assembly preparation method of a colloidal microsphere single-layer film, which comprises the following steps: dripping the colloidal microsphere/alcohol mixed solution onto a clean glass sheet with a layer of deionized water laid on the surface in a water tank; and operating the automatic water supply system, supplying water into the water tank by the water pump, alarming by the buzzer after the water level reaches a set position, stopping the water pump, and obtaining the colloid microsphere single-layer film at the set water level. The method has the advantages of simple operation, low cost, high forming quality and high efficiency, and can be used for preparing large-area photonic crystal films.

Description

Self-assembly preparation method and device of colloidal microsphere single-layer film

Technical Field

The invention relates to the field of film preparation, in particular to a self-assembly preparation method and a self-assembly preparation device of a colloidal microsphere single-layer film.

Background

In 1887, experiments were conducted on the multilayer periodic dielectric stack by the british physicist gazel, and the results of the experiments showed that this structure had a one-dimensional photonic bandgap. Ever since the study of multidimensional periodic optical structures (now called photonic crystals) by ila-obonovich and sajeff john in 1987, there has been an increasing academic interest in photonic crystals. Photonic crystals have been widely used in many fields such as biological imaging, spectroscopy, face recognition, laser radar, virtual reality, etc., and recently, more popular researches on camisole also use photonic crystal materials.

Photonic crystals consist of periodic dielectrics, metal dielectrics and even superconductor microstructures or nanostructures that regulate the way electromagnetic waves propagate, just as periodic potentials in semiconductor crystals regulate the movement of electrons through electronic energy bands. The photonic crystal comprises periodically repeating regions of high and low dielectric constants. The inability of photons (represented as waves) to pass through this photonic crystal structure depends on the wavelength. The wavelengths propagated are called modes, the set of allowed modes form the conduction band of a photon, and the band of disallowed modes is called the photon forbidden band (also called the bandgap). Such properties create unique optical phenomena such as spontaneous emission suppression, highly reflective omnidirectional mirrors, and low loss waveguides. The band gap of a photonic crystal can be intuitively understood to result from destructive interference of multiple reflections of light propagating in the crystal at the interface of high and low dielectric constant regions, similar to the band gap of electrons in a solid.

The self-assembly technology is currently recognized as a key technology for preparing cheap and efficient nano materials, and is widely applied and researched in various laboratories around the world. In the solution, the surfaces of the colloidal particle globules are charged, and under the interaction of proper charge density and particle concentration and electrostatic force, the globules self-organize and grow into a periodic structure to form colloidal crystals. In the capillary vessel, electrostatic forces of the colloidal particles and the charged glass wall are used for interaction. When the volume fraction of the colloidal particles is higher, the colloidal suspension particles are stacked in a face-centered cubic lattice; when the volume fraction is low, there is a tendency for body-centered cubic lattice packing with the closely packed faces of the crystals parallel to the wall surface.

However, the reported single-layer film produced by the self-assembly technology often has the problems of poor forming quality, long forming time, small forming area, high cost and the like, and cannot meet the requirement of mass production. Therefore, there is an urgent need in the art to develop a new self-assembly film-forming technique that has high forming quality, short forming time, large forming area, and low cost, and can be used for mass production.

Disclosure of Invention

The invention provides a method and a device for preparing a colloidal microsphere monolayer film, which have the advantages of high forming quality, short forming time, large forming area and low cost and can be used for large-scale production. In a first aspect, the present invention provides an apparatus for preparing a monolayer film of colloidal microspheres, the apparatus comprising: basin, glass piece, Arduino controller, battery, miniature pump, relay, bee calling organ, water pipe, bread board, level sensor and control button. The glass sheet can be square or rectangular, the length is 6-10 cm, the width is 2-10 cm, and the thickness is 1-2 mm. The glass sheet is horizontally placed 2-6 cm away from the bottom of the water tank. Battery voltage be greater than 5V, detain through T type battery and connect the Arduino controller. The miniature water pump is a direct-current water pump, and the working voltage is 3-6V. The relay is used for driving the water pump, and the water pipe is connected with the water pump to supply water to the water tank. The water sensor is used for monitoring the water level of the water tank, and the buzzer is used for giving out sound and giving an alarm to prompt that the water level of the water tank reaches a set height. The control key is used for starting and stopping the automatic water supply system. In a second aspect, the present invention provides a self-assembly preparation method of a colloidal microsphere monolayer film, comprising the following steps:

s1, horizontally placing a cleaned glass sheet in a water tank;

s2, sucking deionized water by using a plastic dropper, uniformly spreading the deionized water on a glass sheet, and forming a layer of deionized water layer on the surface of the glass sheet;

s3, dissolving the colloidal microspheres in a solvent to prepare a microsphere suspension; the colloidal microspheres can be polystyrene microspheres or silicon dioxide microspheres, the monodispersity of the colloidal microspheres is less than 6%, and the particle size range is 200 nm-3 mu m; the solvent can be absolute ethyl alcohol and water solution of ethyl alcohol with different proportions.

S4, sucking a proper amount of microsphere suspension by using a micro gun, dripping the microsphere suspension at one end of a glass sheet, and standing for several minutes; the volume of the microsphere turbid liquid sucked in a micro-grabbing mode is 60-100 mu L, and the measured microsphere turbid liquid is completely dripped into one end of a glass sheet and then stands for 5-8 minutes.

And S5, starting the automatic water supply system.

Drawings

FIG. 1 is a schematic diagram of a self-assembled manufacturing apparatus for colloidal microsphere monolayer films of the present invention;

FIG. 2 is a schematic view of an automatic water supply system of a preparation apparatus used in the present invention;

FIG. 3 is a schematic wiring diagram of an automatic water supply system of the manufacturing apparatus used in the present invention;

FIG. 4 is a photograph of a polystyrene microsphere monolayer film prepared by the present invention floating on the water surface in a water tank;

FIG. 5 is a photograph of a 300nm polystyrene microsphere monolayer film prepared by the present invention after being transferred to a conductive glass and dried;

FIG. 6 is a scanning electron micrograph of a monolayer film of polystyrene microspheres prepared according to the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, 2 and 3, the present invention provides a self-assembly preparation method of a colloidal microsphere monolayer film and a device thereof, comprising: basin, glass piece, Arduino controller, battery, miniature pump, relay, bee calling organ, water pipe, bread board, level sensor and control button. The glass sheet can be square or rectangular, the length is 6-10 cm, the width is 2-10 cm, and the thickness is 1-2 mm. The glass sheet is horizontally placed 2-6 cm away from the bottom of the water tank. Battery voltage be greater than 5V, detain through T type battery and connect the Arduino controller. The miniature water pump is a direct-current water pump, and the working voltage is 3-6V. The relay is used for driving the water pump, and the water pipe is connected with the water pump to supply water to the water tank. The water sensor is used for monitoring the water level of the water tank, and the buzzer is used for giving out sound and giving an alarm to prompt that the water level of the water tank reaches a set height. The control key is used for starting and stopping the automatic water supply system.

The glass sheet is horizontally placed on the supporting tables on the left side and the right side of the bottom of the water tank and is 2-6 cm away from the bottom. The miniature water pump is horizontally arranged at the bottom of the container filled with clear water, the water outlet is connected with the water pipe, and the other end of the water pipe is communicated with the water tank.

The water sensor is vertically fixed on the inner wall of the water tank and used for monitoring the water level in the water tank.

Examples

Taking the preparation of a large-area self-assembled monolayer film of 300nm polystyrene nano microspheres as an example, the method comprises the following specific steps:

s1, selecting a glass sheet with the length, the width and the thickness of 10cm and 1.8 mm. After the glass sheet was washed with a detergent, the glass sheet was horizontally placed on a support table with a height of 2cm at the bottom of the water tank.

S2, sucking deionized water by using a plastic dropper, dropping the deionized water on the glass sheet until a layer of deionized water covering the whole glass is formed on the surface of the glass sheet, and stopping dropping water.

S3, measuring 80 mu L of polystyrene nano microsphere stock solution by using a micro gun, placing the polystyrene nano microsphere stock solution into a miniature plastic U-shaped pipe with a cover, taking 160 mu L of absolute ethyl alcohol, placing the absolute ethyl alcohol into the U-shaped pipe (configured according to the proportion of 1: 2), sealing the U-shaped pipe, and placing the U-shaped pipe in an ultrasonic cleaning machine for ultrasonic oscillation for 4 minutes.

S4, after oscillation is finished, measuring 80 mu L of microsphere suspension by using a micro gun, dripping the suspension on one end of a glass sheet as shown in figure 1, and then standing for 6 minutes.

And S5, starting the automatic water supply system. The early warning water level is set to be 8cm away from the bottom of the water tank, the starting button is pressed, the water pump starts to work and conveys tap water to the water tank, the buzzer sounds for alarm after the water sensor monitors that the water level of the water tank reaches a set height, the water pump stops working, the buzzer model adopted in the embodiment is 5V in an active integrated mode, and the adopted water pump is a direct-current 3W horizontal micro water pump.

S6, finishing the generation of the thin film, as shown in figure 4. The film is obtained by using the selected substrate, wherein the polystyrene nano microsphere single-layer film is obtained by using a conductive glass sheet, and the film is dried in a forced air drying oven, and then is shown in figure 5.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a device of preparation colloid microballon individual layer film which characterized in that, the device includes basin, glass piece, Arduino controller, battery, miniature water pump, relay, bee calling organ, water pipe, bread board, water sensor and control button.

2. The apparatus of claim 1, wherein: the glass sheet can be square or rectangular, the length is 6-10 cm, the width is 2-10 cm, and the thickness is 1-2 mm. The glass sheet is horizontally placed 2-6 cm away from the bottom of the water tank.

3. The apparatus of claim 1, wherein: battery voltage be more than 5V, detain through T type battery and connect the Arduino controller.

4. The apparatus of claim 1, wherein: the miniature water pump is a direct-current water pump, and the working voltage is 3-6V.

5. The apparatus of claim 1, wherein: the relay is used for driving the water pump, and the water pipe is connected with the water pump to supply water to the water tank.

6. The apparatus of claim 1, wherein: the water sensor is used for monitoring the water level of the water tank, the buzzer is used for giving out sound and giving an alarm to prompt that the water level of the water tank reaches a set height, and the type of the buzzer can be selected from 3V, 5V and 12V of an active body.

7. The apparatus of claim 1, wherein: the control key is used for starting and stopping the automatic water pumping system.

8. A self-assembly preparation method of a colloidal microsphere single-layer film is characterized by comprising the following steps:

s1, horizontally placing a cleaned glass sheet in a water tank;

s3, dissolving the colloidal microspheres in a solvent to prepare a microsphere suspension;

s4, sucking a proper amount of microsphere suspension by using a micro gun, dripping the suspension at one end of a glass sheet, and standing for several minutes;

and S5, starting the automatic water supply system.

9. The self-assembly preparation method of the colloidal microsphere monolayer film according to claim 8, wherein the self-assembly preparation method comprises the following steps: in step S3, the colloidal microspheres may be polystyrene microspheres or silica microspheres, the monodispersity of which is less than 6%, and the particle size range is 200nm to 3 μm; the solvent can be absolute ethyl alcohol and water solution of ethyl alcohol with different proportions.

10. The self-assembly preparation method of the colloidal microsphere monolayer film according to claim 8, wherein the self-assembly preparation method comprises the following steps: in step S4, the volume of the microsphere suspension sucked by the micro gun is 60 to 100 μ L, and the measured microsphere suspension is dropped into one end of the glass sheet and then left for 5 to 8 minutes.