Modified carbon nanocone functionalized needle tip and preparation method thereof

A carbon nanocone, nanocone technology, applied in nanotechnology, nanotechnology, nanotechnology for information processing, etc., can solve the problems of reducing the utilization rate of carbon nanocones, improve the field enhancement effect, and avoid the damage of the needle tip structure. Even failure, the effect of ensuring stability

Pending Publication Date: 2022-04-05
THE GBA NAT INST FOR NANOTECHNOLOGY INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the curvature of the carbon nanocone tip, the common method is to select the carbon nanocone with a smaller curvature in the existing carbon nanocone, which greatly reduces the utilization rate of the carbon nanocone

Method used

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  • Modified carbon nanocone functionalized needle tip and preparation method thereof
  • Modified carbon nanocone functionalized needle tip and preparation method thereof
  • Modified carbon nanocone functionalized needle tip and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] see Figure 1-4 , this embodiment provides a modified carbon nanocone functionalized tip, the base material of which is metal tungsten, and the front end is modified by the modified carbon nanocone. The modified carbon nanocone is a product obtained by etching the carbon nanocone. Its tip and tail are etched into a stepped shape, the tip is sharp, the surface is clean and free of impurities, and there are dangling bonds on the surface of the tip. The tail of the modified carbon nanocone forms a covalent bond interface connection with the base of the needle tip, and the orientation of the tip is consistent with the orientation of the central axis of the needle tip. figure 1 It is the scanning electron microscope (SEM) photo of the modified carbon nanocone obtained in the present embodiment, and it can be observed that there is a slight etching phenomenon in the tip and tail of the modified carbon nanocone by scanning data; figure 2 It is the transmission electron micro...

Embodiment 2

[0046] see Figure 5-9 , this embodiment provides a modified carbon nanocone functionalized tip, the base material of which is metal cobalt, and the front end is modified by modified carbon nanocone. The modified carbon nanocone is a product obtained by etching the carbon nanocone. Its tip and tail are etched into a stepped shape, the tip is sharp, the surface is clean and free of impurities, and there are dangling bonds on the surface of the tip. The tail of the modified carbon nanocone forms a covalent bond interface connection with the base of the needle tip, and the orientation of the tip is consistent with the orientation of the central axis of the needle tip.

[0047] Figure 5 It is the SEM photo of the modified carbon nanocone obtained in this embodiment. It can be visually observed through the scanning data that there is an etching phenomenon at the tip and tail of the modified carbon nanocone. Image 6 It is a TEM photo of the modified carbon nanocone tip obtained ...

Embodiment 3

[0053] see Figure 10-11 , this embodiment provides a modified carbon nanocone functionalized needle tip, the base material of which is metal nickel, and the front end is modified by the modified carbon nanocone. The modified carbon nanocone is a product obtained by etching the carbon nanocone. Its tip and tail are etched into a stepped shape, the tip is sharp, the surface is clean and free of impurities, and there are dangling bonds on the surface of the tip. The tail of the modified carbon nanocone forms a covalent bond interface connection with the base of the needle tip, and the orientation of the tip is consistent with the orientation of the central axis of the needle tip.

[0054] Figure 10 It is the SEM photo of the modified carbon nanocone obtained in the present embodiment, and it can be visually observed that the tip of the modified carbon nanocone is completely etched by scanning data, which is open, and the tail is also severely etched; Figure 11 It is an HRTEM...

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Abstract

The invention relates to the technical field of metal material functionalization, in particular to a modified carbon nanocone functionalized needle tip and a preparation method thereof. According to the modified carbon nanocone functionalized needle tip and the preparation method thereof provided by the invention, the modified carbon nanocone of which the tip and the tail generate stepped damage is used as a functionalized needle tip modification material, the blunt tip of the modified carbon nanocone is etched into a stepped tip, the curvature of the tip is reduced, and the field enhancement effect is greatly improved; the surface of the modified carbon nanocone tip is clean and free of impurities, and a clean carbon nanocone tip with a complete tip structure can be obtained; in addition, dangling bonds exist on the surface of the stripped tip, and the emission performance can be better improved.

Description

technical field [0001] The invention relates to the technical field of metal material functionalization, in particular to a modified carbon nano-cone functionalized needle tip and a preparation method thereof. Background technique [0002] Electron emission sources are widely used in various vacuum electronic devices and equipment. In the field of display technology, it can be widely used in automobiles, household audio-visual appliances, industrial instruments and other fields. Among them, electron microscopes, electron beam exposure and other equipment require electron sources to have characteristics such as high brightness and large beam current. In recent years, with the development of nanomaterials and micro-nano manipulation technology, researchers have prepared nanomaterial-functionalized tips such as carbon nanotubes, one-dimensional nanowires, and carbon nanocones. The advantages of thermal conductivity, thermal conductivity and field emission performance have bee...

Claims

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Application Information

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IPC IPC(8): H01J1/304H01J9/02B82Y40/00B82Y10/00
Inventor 徐建勋李超杰陈子煊
Owner THE GBA NAT INST FOR NANOTECHNOLOGY INNOVATION
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