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Method for preparing titanium dioxide nano tip array film for field emission

A titanium dioxide, nano-tip technology, applied in the field of nano-materials, can solve the problems of unsatisfactory results, and achieve the effects of increasing field emission performance, reducing preparation costs and strong stability

Inactive Publication Date: 2013-03-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, some research groups have studied the field emission properties of titanium dioxide nanotubes, but the results are not very satisfactory due to the strong shielding effect.

Method used

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  • Method for preparing titanium dioxide nano tip array film for field emission
  • Method for preparing titanium dioxide nano tip array film for field emission
  • Method for preparing titanium dioxide nano tip array film for field emission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Pretreatment of titanium flakes

[0034] Sonicate the titanium sheet with acetone, alcohol, and deionized water for 15 minutes each, and set aside.

[0035] 2. Preparation of electrolyte

[0036] The electrolytic solution uses ethylene glycol as a solvent, to which 0.25% (mass percentage) of ammonium fluoride and 0.6% (volume percentage) of water are added.

[0037] 3. First Anodizing

[0038] Put the titanium sheet on the positive electrode, put it into the electrolyte solution prepared in step 2, use graphite as the negative electrode, anodize at 60V for 60h, and age the solution. Then, another titanium sheet was put in and anodized at 60V for 24h to obtain a titanium dioxide nanotube array.

[0039] 4. Ultrasound

[0040] Take out the titanium sheet with the titanium dioxide nanotube array grown in step 3, and wash it with deionized water, and then put it into an ultrasonic instrument to concentrate the ultrasound until the titanium dioxide nanotube array in s...

Embodiment 2

[0048] 1. Pretreatment of titanium flakes

[0049] Sonicate the titanium sheet with acetone, alcohol, and deionized water for 10 min each, and set aside.

[0050] 2. Preparation of electrolyte

[0051] The electrolytic solution uses ethylene glycol as a solvent, to which 0.25% (mass percentage) of ammonium fluoride and 0.8% (volume percentage) of water are added.

[0052] 3. First Anodizing

[0053] Install the titanium sheet on the positive electrode, put it into the electrolyte solution prepared in step 2, use the Pt electrode as the negative electrode, anodize at 60V for 36h, and age the solution. Then, another titanium sheet was put in and anodized at 60V for 12h to obtain a titanium dioxide nanotube array.

[0054] 4. Ultrasound

[0055] Take out the titanium sheet with the titanium dioxide nanotube array grown in step 3, and wash it with deionized water, and then put it into an ultrasonic instrument to concentrate the ultrasound until the titanium dioxide nanotube ar...

Embodiment 3

[0063] 1. Pretreatment of titanium flakes

[0064] Sonicate the titanium sheet with acetone, alcohol, and deionized water for 20 minutes each, and set aside.

[0065] 2. Preparation of electrolyte

[0066] The electrolytic solution uses ethylene glycol as a solvent, to which 0.25% (mass percentage) of ammonium fluoride and 1% (volume percentage) of water are added.

[0067] 3. First Anodizing

[0068] Install the titanium sheet on the positive electrode, put it into the electrolyte solution prepared in step 2, use graphite as the negative electrode, anodize at 60V for 48 hours, and age the solution. Then, another titanium sheet was put in and anodized at 60V for 18h to obtain a titanium dioxide nanotube array.

[0069] 4. Ultrasound

[0070] Take out the titanium sheet with the titanium dioxide nanotube array grown in step 3, and wash it with deionized water, and then put it into an ultrasonic instrument to concentrate the ultrasound until the titanium dioxide nanotube arr...

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Abstract

The invention provides a method for preparing a titanium dioxide nano tip array film for field emission, mainly comprising the following steps of: firstly, performing primary anodic oxidation on a swing-cleaned titanium sheet, and then removing the titanium dioxide nano-tube film attached to the titanium sheet through ultrasound; and next, loading the titanium sheet into the electrode again and performing secondary anodic oxidation, and then taking out the titanium sheet for cleaning through swinging to finally obtain the titanium dioxide nano tip array film. The method provided by the invention realizes the preparation of the titanium dioxide nano tip array film suitable for field emission. Compared with the traditional microelectronic field emission tip array, the method provided by the invention is simple, and preparation parameters are easy to control; and the tip of the array is sharp, which is advantageous for gaining field emission. Furthermore, the titanium dioxide nano tip array film annealed at high temperature previously has lower opening and threshold field intensity; and particularly, the sample annealed at 450 DEG C has the minimum opening and threshold field intensity and is obviously improved in field emission performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and relates to the preparation of titanium dioxide nanostructures, in particular to the preparation of a titanium dioxide nano-tip array thin film for field emission. Background technique [0002] In the past ten years, the use of nanomaterials to realize the performance of field emission has received widespread attention. In many studies, researchers have used bottom-up growth methods on substrates to grow nanomaterials that can be used in field emission, such as carbon tubes or zinc oxide nanorods. This material has a large aspect ratio, which has a significant effect on enhancing the performance of field emission. However, the shielding effect produced by this material is unavoidable. [0003] Titanium dioxide is a typical semiconductor material with a wide range of applications, especially the application of titanium dioxide nanomaterials. In recent years, people have done a lot of wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B82Y40/00
Inventor 梁佳张耿民
Owner PEKING UNIV
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