Method for electrophoretic anode deposition preparation of carbon nanotube field-emission film

A carbon nanotube film, electrophoretic deposition method, applied in the field of nanomaterial application research, can solve the problems affecting the field emission performance of the carbon nanotube film, weak bonding force between the carbon nanotube film and the substrate, etc., and achieves low turn-on voltage, high Effect of Field Emission Current Density

Inactive Publication Date: 2007-05-16
TSINGHUA UNIV
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Problems solved by technology

[0003] Therefore, the existing carbon nanotube films are mainly prepared by the process of direct growth, and the impurities brought by the direct growth affect the fie

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  • Method for electrophoretic anode deposition preparation of carbon nanotube field-emission film

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Embodiment Construction

[0012] The invention provides an electrophoretic anode deposition preparation method of a carbon nanotube field emission film. The process steps of the present invention will be described below with reference to the drawings. As shown in Figure 1,

[0013] (1) First, the original carbon nanotube powder grown by the CVD method, 0.1 g of multi-walled carbon nanotubes with a length of about 0.1-50 μm and a diameter of 10-20 nm, is mixed with 0.5 g of surfactant, and added to 100 mL of deionized water. The ultrasonic power is about 100-500W for ultrasonic dispersion for 1 to 2 hours to form a very uniform carbon nanotube dispersion liquid. Experiments have observed that the carbon nanotube dispersion liquid obtained by ultrasonic can be maintained for more than half a year without coagulation.

[0014] (2) Use the electrophoretic deposition method to deposit the dispersed carbon nanotubes on the surface of the stainless steel or titanium anode. The schematic diagram of the electrophor...

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Abstract

The invention discloses a preparing method of launching film of carbon nanometer pipe field in the nanometer material preparing technical domain, which comprises the following steps: dispersing original carbon nanometer pipe in the sodium dodecyl sulfate solution through ultrasound; forming carbon nanometer suspension electrophoretic liquid; sedimenting dispersed carbon nanometer pipe on the surface of stainless steel or titanium anode; heating carbon nanometer pipe film slowly in the high-temperature furnace to 400 Deg C; insulating for 30 min; fetching; cooling protected by nitrogen.

Description

Technical field [0001] The invention belongs to the application research field of nano materials. In particular, it relates to an electrophoretic anode deposition preparation method of a carbon nanotube field emission film widely used in micro-nano manufacturing. Background technique [0002] In 1991, Iijima of Japan first discovered multi-walled carbon nanotubes (MWNT) with a diameter of 4-30nm and a length of 1um. Single-walled carbon nanotubes (SWNT) were also discovered in 1993, with diameters ranging from 0.4nm to 3-4nm and lengths up to several microns. Carbon nanotubes have unique electronic, mechanical and chemical properties, and have a wide range of applications in the fields of machinery, electrochemistry, energy, and display devices. Carbon nanotubes have two unique and excellent electrical properties, one is the field emission property, and the other is the double electrical property of carbon nanotubes. These two unique electrical properties make this new material h...

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Application Information

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IPC IPC(8): C25D13/02C25D15/00C01B31/02H01L21/205
Inventor 胡元中彭倚天王慧
Owner TSINGHUA UNIV
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