Nickel-titanium amorphous alloy grid supporting film for transmission electron microscope

A technology of electron microscopy and amorphous alloy thin film, which is applied in the direction of circuits, discharge tubes, sputtering coating, etc., can solve the problems of charge accumulation and low mechanical strength of the support film, and achieve large-scale mass production, improve mechanical strength, The effect of easy parameter control

Active Publication Date: 2015-05-13
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of charge accumulation and low mechanical strength of the above-mentioned support

Method used

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  • Nickel-titanium amorphous alloy grid supporting film for transmission electron microscope

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A nickel-titanium amorphous alloy grid supporting film for a transmission electron microscope, the nickel-titanium amorphous alloy grid supporting film is successively a grid and an amorphous alloy thin film layer from bottom to top, and the amorphous alloy thin film layer contains nickel and titanium elements.

[0030] Further, the content of the nickel element is 40-60 at.%, and the content of the titanium element is 60-40 at.%.

[0031] Further, the thickness of the amorphous alloy film layer is 5-18 nm.

[0032] The preparation method of the nickel-titanium amorphous alloy grid supporting film for the transmission electron microscope comprises the following steps:

[0033] (1) Prepare an organic film as a transition film;

[0034] (2) Floating the organic film into water, spreading the carrier net and filter paper on the organic film successively to obtain the carrier net covered with the organic film;

[0035] (3) Using magnetron sputtering or thermal evaporatio...

Embodiment 2

[0042] This embodiment is a preferred solution on the basis of Example 1, wherein the organic film is selected from Fanghua film, and the preparation method of the nickel-titanium amorphous alloy gold-carrying grid support film includes the following steps:

[0043] (1) Prepare a 0.5% Fanghua powder solution, insert a clean glass slide into the Fanghua powder solution, let it stand for 10 s, remove the slide from the solution, place it in a petri dish, dry it, and scratch it with a blade. Cut the surrounding area of ​​the film on the glass slide, insert the glass slide into clean distilled water obliquely, the Fanghua film will fall off from the glass slide and float on the surface of the distilled water.

[0044] (2) Ultrasonic clean the carrier grid without support membrane with acetone for 5 minutes, then wash it twice with clean distilled water, remove it, dry it, spread it on the Fanghua membrane one by one, cut the filter paper with the same size as the membrane area, La...

Embodiment 3

[0050] The present embodiment is a preferred scheme on the basis of Example 1, wherein the organic film is selected from collodion film, and the preparation method of the nickel-titanium amorphous alloy gold-carrying mesh support film comprises the following steps:

[0051] (1) make solvent with amyl acetate, prepare 2% collodion solution;

[0052] (2) Use a glass dropper to drop a drop of collodion solution on the surface of clean distilled water. The collodion solution quickly spreads to form a film on the water surface. Use a clean lens tissue to wipe off the collodion film on the water surface to clean the water surface. ;

[0053] (3) Drop another drop of collodion solution on the surface of distilled water, and the collodion solution spreads rapidly on the water surface to form a film;

[0054] (4) Soak the grid in clean acetone for 5 min to clean the organic matter on the surface of the grid, and then rinse it with clean distilled water for 3 times to obtain the cleane...

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Abstract

The invention discloses a nickel-titanium amorphous alloy grid supporting film for a transmission electron microscope and a preparation method of the nickel-titanium amorphous alloy grid supporting film. A conductive film used is a nickel-titanium alloy nanometer film; the nickel-titanium alloy is shape memory alloy which is high in elasticity and mechanical strength, serves as a good conductor for power and heat and can be widely applied to medical apparatuses and instruments. The nickel-titanium alloy is in a large-scale industry at present and is the alloy material easily obtained. The grid supporting film is prepared from the nickel-titanium alloy material, and thus the superelasticity, the high mechanical strength and the outstanding conductivity of the shape memory alloy can be fully utilized to problems of low mechanical strength and serious electric charge of a carbon supporting film can be solved.

Description

technical field [0001] The invention belongs to the new application field of metal materials and the field of transmission electron microscopy, in particular, the nickel-titanium amorphous alloy thin film is used to prepare the support film of the transmission electron microscope grid. Background technique [0002] As a shape memory alloy with superior performance, nickel-titanium alloy not only has shape memory function, but also has good superelasticity, electrical conductivity, wear resistance and corrosion resistance. Bulk nickel-titanium alloys have been widely used in many fields of engineering and medicine, and can be used to make cardiovascular stents. Thin-film nickel-titanium alloys can easily obtain amorphous thin films by magnetron sputtering, while retaining good electrical conductivity and mechanical strength, and can be used as support materials. [0003] Transmission electron microscopy can analyze the microstructure of materials, and now it has reached su...

Claims

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Application Information

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IPC IPC(8): H01J37/26C25D3/56
CPCC23C14/35C25D3/56H01J37/26
Inventor 张雷尹长城
Owner PEKING UNIV
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