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Application of wood slices as TEM carrier net, TEM carrier net and preparation method of thereof

A wood, slicing technology, applied in the analysis of materials, material analysis using wave/particle radiation, discharge tubes, etc., can solve the problems of affecting high-quality sample observation, adverse hydrophilic sample adsorption, and increased cost.

Active Publication Date: 2021-04-09
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These grids with a relatively regular mesh structure are obtained by precise corrosion methods and electrodeposition methods. Therefore, the preparation process is complicated and the cost of the grid is high.
Moreover, these transmission electron microscope grid consumables are generally not recycled and reused after use, and are directly discarded, which not only causes waste of resources but also pollutes the environment
Moreover, the surface of various transmission electron microscope grids prepared directly is usually hydrophobic, which is not conducive to the adsorption of hydrophilic samples. However, many samples are hydrophilic when observed by transmission electron microscopy. Therefore, it is necessary to use plasma and other technologies to realize the hydrophilicity of the grid. Water-based, not only the process is complicated, but also the cost is greatly increased
In addition, some TEM sample preparation solutions are acidic, alkaline or other special environments, such as sampling and observation of samples after hydrofluoric acid solution etching, and the commonly used carrier grids are made of metal materials such as copper. In the sample preparation solution, these grids are prone to grid structure damage, which affects high-quality sample observation

Method used

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  • Application of wood slices as TEM carrier net, TEM carrier net and preparation method of thereof
  • Application of wood slices as TEM carrier net, TEM carrier net and preparation method of thereof
  • Application of wood slices as TEM carrier net, TEM carrier net and preparation method of thereof

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Embodiment 1

[0030] A TEM carrier net of the present invention is obtained by treating Chinese fir wood slices with alkali solution.

[0031] A preparation method of the TEM carrier grid of the present embodiment, comprising the steps of:

[0032] 1. First, soak 8mm*8mm*10mm Chinese fir pieces in boiling water for 30 minutes to soften;

[0033] 2. Fix the wet Chinese fir block on a slicer, slice along the direction perpendicular to the growth direction, and obtain wood slices with a thickness of 20 μm;

[0034] 3. Soak the fir wood slices obtained in 0.5mol / L sodium hydroxide solution for 24 hours, remove the resin and other contents in the wood pores, wash and dry for later use;

[0035] 4. Cut the obtained wood slices into discs of the size of the TEM grid, with a diameter of about 3 mm.

[0036] The prepared TEM grid was used for TEM test and observation.

[0037] The above-mentioned TEM grid is used to observe halloysite nanotubes and graphene oxide, including the following steps: ...

Embodiment 2

[0046] A TEM carrier net of the present invention is obtained by treating poplar wood slices with alkali solution.

[0047] A preparation method of the TEM carrier grid of the present embodiment, comprising the steps of:

[0048] 1. First, soak 8mm*8mm*10mm poplar blocks in boiling water for 30 minutes to soften;

[0049] 2. Fix the damp poplar wood block on a slicer, slice along the direction perpendicular to the growth direction, and obtain wood slices with a thickness of 20 μm;

[0050] 3. Soak the obtained poplar wood slices in 0.5mol / L sodium hydroxide solution for 24 hours, remove the resin and other contents in the wood pores, wash and dry for later use;

[0051] 4. Cut the obtained wood slices into discs of the size of the TEM grid, with a diameter of about 3 mm.

[0052] The prepared TEM grid was used for TEM test and observation.

[0053] Above-mentioned TEM grid is used for observing graphene oxide, comprises the following steps:

[0054] 1. Preparation of TEM s...

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Abstract

The invention provides an application of wood slices as a TEM carrier net, and also provides the TEM carrier net and a preparation method thereof, the TEM carrier net is obtained by softening and slicing wood, treating the obtained wood slices with an alkaline solution, then cleaning, drying and cutting the wood slices into the size of the TEM carrier net. The carrier net has the advantages of being cheap, easy to obtain, simple in preparation process, environmentally friendly, capable of resisting acid and alkali, excellent in hydrophilicity due to the fact that the surface of wood is rich in hydroxyl and the like, the morphology and the structure of a sample can be accurately and clearly represented, measured data have high reliability, the carrier net can be widely applied to the field of transmission electron microscope testing and has good application prospects, and the carrier net has a very attractive commercial application prospect.

Description

technical field [0001] The invention relates to the application of a wood slice as a TEM carrying net, the TEM carrying net and a preparation method thereof. Background technique [0002] In TEM technology, small-sized samples need to be placed on a special grid, its quality will directly affect the results of sample observation and research, and the grid is also one of the most commonly used consumables for TEM characterization. The main function of the carrier grid for transmission electron microscope is to load the sample and the electron beam can pass through the sample when observed by the transmission electron microscope, which requires the carrier grid to have a good mesh structure so that it has high transparency, and the mesh size is generally 6.5 to 200 Micron, and does not produce chemical reactions with various supported samples, good stability and other properties. [0003] At present, the commercial grid material used is mainly copper, in addition to nickel, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2204H01J37/20
CPCG01N23/2204H01J37/20
Inventor 刘贡钢孙雅婷徐东年胡进波刘元
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY