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Method for preparing cathode of field emission display device based on metal/nano-pipe compound plated

A nanotube composite and display device technology is applied in the field of preparation in the field of nanotechnology, and can solve the problems of poor electrical conductivity and thermomechanical properties, low resolution of field emission display devices, affecting electron emission efficiency, and the like, and achieves short response time, The effect of long service life and high emission efficiency

Inactive Publication Date: 2006-09-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method usually uses a polymer as the matrix material, which has poor electrical conductivity and thermomechanical properties. The field emission turn-on voltage of the nanotubes embedded in it will be greatly increased, and the emission efficiency will also be reduced. It is difficult to withstand the damage caused by the field emission process. local high temperature
In addition, when the opening diameter of the gate electrode of the display device is increased to prevent the short circuit between the cathode electrode and the gate electrode caused by the nanotube, it becomes difficult to form a high electric field near the nanotube, which affects the electron emission efficiency
The resolution of the prepared field emission display device is also low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation process of zinc / carbon nanotube composite film field emission cathode is as follows:

[0052] 1. Pretreatment of nanotubes:

[0053] Select multi-walled carbon nanotubes with an average diameter of 20nm and a length of 15-20μm, and perform the following treatments in turn:

[0054] (a) ball milling, rotating speed 400rpm, time 4 hours;

[0055] (b) Treatment with molten potassium hydroxide at a temperature of 300° C. for 4 hours, washing with deionized water, and centrifugation;

[0056] (c) concentrated sulfuric acid was boiled for 20 hours;

[0057] (d) Wash with deionized water until neutral, and separate by natural sedimentation.

[0058] After pretreatment, the end of the nanotube structure is open, the purity is more than 95%, and the length is less than or equal to 10 μm.

[0059] 2. Add the pretreated nanotubes into the basic plating solution according to the following content, and ultrasonically treat for 1 hour;

[0060] 3. Composite elect...

Embodiment 2

[0073] The zinc / carbon nanotube composite film field emission cathode preparation process with a silver protective film is as follows:

[0074] 1. Pretreatment of nanotubes:

[0075] Select multi-walled carbon nanotubes with a diameter of 20-40nm and a length of 20-40μm, and perform the following treatments in sequence:

[0076] (a) treatment with molten potassium hydroxide at a temperature of 300° C. for 4 hours, washing with deionized water, and centrifugation;

[0077] (b) concentrated sulfuric acid was boiled for 20 hours;

[0078] (c) Wash with deionized water until neutral, and separate by natural sedimentation.

[0079] After pretreatment, the end of the nanotube structure is open, and the purity is more than or equal to 95%.

[0080] 2. Add the pretreated nanotube structure into the electroplating solution, and ultrasonically treat it for 1 hour;

[0081] 3. Composite electrodeposition

[0082] Zinc is selected as the thin film substrate of the electron emission s...

Embodiment 3

[0105] The silver / nanotube composite film preparation process for field emission display devices is as follows:

[0106] 1. Pretreatment of nanotubes:

[0107] Multi-walled carbon nanotubes (average diameter 20nm, length 15-20μm), single-walled carbon nanotubes (average diameter 1.8nm, length 15-20μm) and carbon nanofibers (average diameter 100nm, length 15-20μm) were selected, respectively. Do the following:

[0108] Multi-walled carbon nanotube processing flow:

[0109] (a) ball milling, rotating speed 400rpm, time 4 hours;

[0110] (b) Treatment with molten potassium hydroxide at a temperature of 300° C. for 4 hours, washing with deionized water, and centrifugation;

[0111] (c) concentrated sulfuric acid was boiled for 20 hours;

[0112] (d) Wash with deionized water until neutral, and separate by natural sedimentation.

[0113] Single-walled carbon nanotube processing flow:

[0114] (a) ball milling, rotating speed 400rpm, time 4 hours;

[0115] (b) Ultrasonic osci...

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Abstract

This invention relates to a cathode preparation method for field emission display devices based on metal / nm tube composite plating including: pre-processing nm tubes to open its end and purify it then scattering or adding a dispersant to scatter the nm tubes in a plating basic solution then to prepare metal / nm tube gradient composite film at the assigned position of the cathode of the display device by a mask plating method then to erode the surface of the composite plating layer so as to release part of the nm tubes of the extreme layer from the metal cladding, finally cleaning the plating layer to form a metal / nm tube composite micro-structure with part bared and part implanted in the metal matrix.

Description

technical field [0001] The invention relates to a preparation method in the field of nanotechnology, in particular to a method for preparing a cathode of a field emission display device based on metal / nanotube composite plating. Background technique [0002] Field emission display devices using high-performance field emission materials as cold cathode electron emission sources have both the advantages of high display quality of cathode ray tubes and low power consumption of liquid crystal displays, and are expected to become a new generation of image display devices that can replace traditional displays. Carbon materials are widely recognized as a field emission material, and carbon nanotubes and carbon nanofibers with graphene sheet coaxially coiled cylindrical structures have become the most potential for their extremely slender shape, good chemical stability and superior electrical conductivity. One of the field emission materials. The preparation methods of the electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02
Inventor 丁桂甫吴惠箐王裕超
Owner SHANGHAI JIAO TONG UNIV
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