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Method for preparing two-dimensional nanomaterial film on basis of liquid phase method

A two-dimensional nanomaterial and two-dimensional nanotechnology are applied in the field of large-area rapid preparation of two-dimensional nanomaterial thin films, which can solve the problems of high film production cost, poor film uniformity, and unfriendly environment, and achieve short preparation cycle and low cost , highly reproducible effect

Active Publication Date: 2016-01-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main advantages of the chemical vapor deposition preparation method is that the two-dimensional material film has stable properties and can form a single-layer thick film with excellent photoelectric and thermal properties, but the film is expensive to manufacture and difficult to transfer.
The common solution assembly methods often use methods such as spin coating and suction filtration, but the films prepared by these methods have poor uniformity and thick thickness, and may use environmentally unfriendly materials and chemical reagents during the preparation process.

Method used

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  • Method for preparing two-dimensional nanomaterial film on basis of liquid phase method
  • Method for preparing two-dimensional nanomaterial film on basis of liquid phase method
  • Method for preparing two-dimensional nanomaterial film on basis of liquid phase method

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Experimental program
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Effect test

Embodiment 1

[0026] 1) select the ethanol solution of 0.1mg / mL graphene for use;

[0027] 2) Single crystal silicon is selected as the substrate for film transfer;

[0028] 3) Place the monocrystalline silicon substrate on the bottom of the petri dish, pour water into the petri dish, and slowly inject the previously configured graphene ethanol solution along the wall of the cup with a dropper. At this time, a layer with a thickness of about Uniform graphene films with a thickness of several nanometers;

[0029] 4) Take out the water at the bottom of the petri dish with a syringe, the graphene film is closely attached to the silicon substrate, take out the substrate, and let it dry to obtain the final product graphene film (such as figure 1 , 2 , 3 shown).

Embodiment 2

[0031] 1) select the acetone solution of 10mg / mL graphene for use;

[0032] 2) Select polydimethylsiloxane as the substrate for film transfer;

[0033] 3) Put the polydimethylsiloxane at the bottom of the petri dish, inject 1mol / L sodium chloride solution into the petri dish, and slowly inject the graphene acetone solution prepared before with a dropper along the wall of the cup. A uniform graphene film with a thickness of several nanometers is formed on the surface of the liquid phase;

[0034] 4) Draw out the sodium chloride solution at the bottom of the petri dish with a syringe, the graphene film is closely attached to the polydimethylsiloxane, take out the substrate, and let it dry to obtain the final graphene film;

[0035] 5) Apply silver glue and silver wires on both ends of the graphene film, place the graphene / polydimethylsiloxane sample in a stretching machine, and connect the silver wires to the resistance tester at the same time, as the stretching machine stretch...

Embodiment 3

[0037] 1) select the isopropanol solution of 1mg / mL graphene for use;

[0038] 2) Select polyethylene terephthalate as the substrate for film transfer;

[0039] 3) Put the polyethylene terephthalate base material on the bottom of the petri dish, inject 0.1mol / L potassium chloride solution into the petri dish, and extend the graphene isopropanol solution prepared before with a dropper. The cup wall is slowly injected, and at this time, a uniform graphene film with a thickness of several nanometers is formed on the surface of the liquid phase;

[0040] 4) Draw out the potassium chloride solution at the bottom of the petri dish with a syringe, the graphene film is closely attached to the polyethylene terephthalate base material, take out the base material, and let it stand and dry to obtain the final graphene film.

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Abstract

The invention discloses a method for preparing a two-dimensional nanomaterial film on the basis of a liquid phase method. According to the method, an organic solution is prepared from two-dimensional nanomaterials and placed on the surface or inside an aqueous or saline solution, the two-dimensional nanomaterials are quickly assembled on the surface of the aqueous or saline solution to from a large-area film, the film is formed by stacking two-dimensional nanomaterial laminates, the film thickness is only 2-10 nm, and the film can be transferred onto any substrate. The method has the advantages that the cost is low, the energy consumption is low, the preparation cycle is short, the repeatability is high, the operation process is safe and simple, the preparation process is environment-friendly, and the method can be applied to large-scale industrial production; the film has high light transmission, the resistance of the film is very sensitive to deformation responses, and the film can be used as a high-sensitivity flexible strain sensor.

Description

technical field [0001] The invention relates to a method for quickly preparing a large-area two-dimensional nanomaterial thin film, and belongs to the technical field of nanomaterial preparation. Background technique [0002] The emergence of graphene has opened up a new field of research based on two-dimensional nanomaterials. Due to its perfect two-dimensional single atomic layer structure, two-dimensional materials such as graphene exhibit unique electrical, optical, thermal and mechanical properties, and thus have important application prospects in many fields. Two-dimensional nanomaterials mainly include graphene, boron nitride, molybdenum disulfide, tungsten disulfide, and black phosphorus; and low prices and convenient processing methods are crucial for the mass production of two-dimensional nanomaterials. [0003] In order to realize the industrial production of two-dimensional nanomaterials, the size and shape of two-dimensional nanomaterials must be controllable i...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G39/06C01B21/064C01G41/00C01B25/02B82Y40/00
Inventor 朱宏伟李昕明杨尧王昆林
Owner TSINGHUA UNIV
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