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Oxidized graphene carbon support film TEM grid and preparation method thereof

A graphene carbon, transmission electron microscope technology, applied in electrode system manufacturing, discharge tube/lamp manufacturing, circuits, etc., can solve the problems of samples failing to meet contrast requirements, complicated carbon support film preparation process, and low mechanical strength. , to achieve the effect of simple steps, simple preparation process and high contrast

Inactive Publication Date: 2017-08-25
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thinner the carbon film, the higher its contrast and the higher the resolution; but too thin carbon film will lead to lower mechanical strength
The existing carbon support film preparation process is complex and thick, and cannot meet the contrast requirements for some samples

Method used

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  • Oxidized graphene carbon support film TEM grid and preparation method thereof
  • Oxidized graphene carbon support film TEM grid and preparation method thereof
  • Oxidized graphene carbon support film TEM grid and preparation method thereof

Examples

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Effect test

preparation example Construction

[0018] A graphene oxide carbon support film transmission electron microscope grid and its preparation method, its steps are as follows: (1) get a piece of common carbon-free membrane electron microscope grid and put it on the filter paper; (2) evenly spread the graphene oxide solution on the (3) volatilize the solvent at normal temperature or under heating conditions.

[0019] The invention provides a method for preparing an ultra-thin carbon film with high mechanical strength, high sample adhesion and high contrast.

Embodiment 1

[0022] (1) Get the 1000-mesh transmission electron microscope copper carrier grid without supporting film and put it on the filter paper;

[0023] (2) Use a pipette gun to pipette the concentration to 0.1mg·mL -1 5 μL of graphene oxide aqueous solution was dropped naturally on the surface of the copper mesh;

[0024] (3) Place the above-mentioned whole sample in a clean and dust-free room temperature environment until the water evaporates naturally.

[0025] Depend on figure 1 It can be seen that the graphene sheets are tiled on the hollow holes, figure 2 It can be seen from the electron diffraction pattern that only three layers of graphene are formed at the thickest part. The carrier grid is used for the sample preparation of nano-silicon particles, such as image 3 shown in image 3 It can be seen from the figure that the strength of the graphene support film is high, and the integrity of the support film is still maintained after the nano-silicon particles are loaded...

Embodiment 2

[0027] (1) Take a 200-mesh transmission electron microscope grid with a microgrid support film, and immerse it at a concentration of 0.5 mg·mL -1 The graphene oxide ethanol solution is evenly pulled up at a speed of 1mm / min;

[0028] (2) Heat the above sample in a clean and dust-free oven at 40°C until the water evaporates naturally. Through testing, the graphene support film has high strength and high contrast.

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Abstract

The invention discloses a graphene oxide carbon support film transmission electron microscope grid and a preparation method thereof. Its steps are as follows: (1) take a piece of ordinary carbon-free electron microscope grid and put it on the filter paper; (2) evenly spread the graphene oxide solution on the surface of the grid; (3) volatilize the solvent under normal temperature or heating conditions. The invention can prepare ultra-thin carbon support film to realize high contrast and high resolution. And the unreduced carbon support film has negatively charged functional groups, which can enhance the adhesion between the carbon film and the sample. The method for preparing the carbon support membrane has the advantages of simple operation, low cost and the like.

Description

technical field [0001] The invention relates to a transmission electron microscope grid and a preparation method thereof, in particular to a graphene oxide carbon support film transmission electron microscope grid used for a transmission electron microscope and a preparation method thereof. Background technique [0002] Due to the use of electrons with shorter wavelengths as the light source, the transmission electron microscope can see structures below 200nm that optical microscopes cannot see, and at the same time ensure high resolution. Because of the above characteristics, it has become impossible in the fields of material science, life science, etc. Indispensable means of detection. Due to the small diameter and good dispersion of proteins and various nanomaterials, in order to ensure that the samples can be carried on the carrier network, an organic film will be covered on the carrier network, which is called "support film". However, due to the poor conductivity of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/20H01J9/00
CPCH01J37/20H01J9/00
Inventor 高超许震郭凡孙海燕
Owner 杭州德烯科技集团有限公司
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