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Carbon nano-tube film supported on an aluminum substrate and preparation method thereof

A carbon nanotube film and carbon nanotube technology, applied in the field of carbon nanotube film preparation, can solve problems such as complex operation process, expensive, and limited film uniformity, and achieve the effect of simple preparation process

Active Publication Date: 2009-09-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used vacuum filtration method has certain restrictions on the filter membrane, and the transfer technology should also be considered to realize its further application. The carbon nanotube film is transferred to the specified substrate, and the operation process is complicated; Requires expensive equipment; the uniformity of the film prepared by the solvent evaporation method is limited

Method used

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  • Carbon nano-tube film supported on an aluminum substrate and preparation method thereof
  • Carbon nano-tube film supported on an aluminum substrate and preparation method thereof
  • Carbon nano-tube film supported on an aluminum substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 10mL(T) 60 Single-stranded DNA aqueous solution with a concentration of 0.1 mg / mL, weighed 1 mg of single-walled carbon nanotubes with a diameter of 0.5 nm, placed in the solution, dispersed in an ice-water bath with 10 W ultrasonic for 6 hours, and the temperature was controlled below 4 °C. The obtained mixture was centrifuged at a high speed of 12000 r / min for 60 minutes, the precipitate was filtered off, and the supernatant was taken to obtain a carbon nanotube DNA solution. The aluminum sheet with a purity of 99.99% is cleaned in ethanol, and the natural oxide layer is removed in a 1mol / l sodium hydroxide solution, and electrochemically polished in a perchloric acid ethanol solution (volume ratio 1:3), with a voltage of 12V . Carry out anodic oxidation once in a sulfuric acid solution with a concentration of 5%, the temperature is 5°C, the voltage is 15V, and the time is 1h. After removing the film in a mixed solution of 2% dichromic acid and 6% phosphoric ac...

Embodiment 2

[0019] Take 4mL(T) 5 Single-stranded DNA aqueous solution with a concentration of 0.1 mg / mL, weighed 1 mg of multi-walled carbon nanotubes with a diameter of 20 nm, placed in the solution, dispersed in an ice-water bath with 80 W ultrasonic for 6 hours, and the temperature was controlled below 4 °C. The obtained mixture was centrifuged at a high speed of 12000 r / min for 40 minutes, the precipitate was filtered off, and the supernatant was taken to obtain a carbon nanotube DNA solution. The aluminum substrate was pretreated as described in Example 1. After the aluminum substrate is naturally dried, take the carbon nanotube solution prepared in the above steps. The temperature of the solution is 20°C and the pH value is 5.5, and the aluminum substrate is immersed below the liquid surface. A relatively uniform carbon nanotube film is formed. The carbon nanotube film has good compactness. A single dispersed carbon nanotube can be seen under the scanning electron microscope. The a...

Embodiment 3

[0021] Take 4mL (GT) 10 Single-stranded DNA aqueous solution with a concentration of 10 mg / mL, weighed 1 mg of single-walled carbon nanotubes with a diameter of 2 nm and placed in the solution, dispersed in an ice-water bath with 200 W ultrasonic for 0.5 hours, and controlled the temperature below 4 °C. The obtained mixture was centrifuged at a high speed of 8000 r / min for 60 minutes, the precipitate was filtered off, and the supernatant was taken to obtain a carbon nanotube DNA solution. The aluminum sheet with a purity of 99.99% is cleaned in ethanol, and the natural oxide layer is removed in a 1mol / l sodium hydroxide solution, and electrochemically polished in a perchloric acid ethanol solution (volume ratio 1:3), with a voltage of 12V . An anodic oxidation is carried out once in a sulfuric acid solution with a concentration of 10%, the temperature is 15°C, the voltage is 25V, and the time is 3h. After removing the film in a mixed solution of 2% dichromic acid and 6% phos...

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Abstract

The invention relates to a carbon nano-tube film supported on an aluminum substrate and a preparation method thereof, wherein, the substrate is an anodized aluminum substrate with the pore diameter of the oxide film being 15nm to 200nm and the thickness thereof being 5 to 150 Mum; the film supported on the aluminum substrate comprises a carbon nano-tube with the diameter being 0.5nm to 20nm and single-stranded DNA (deoxyribonucleic acid) which is 5 to 60 guanines (G) or 5 to 60 thymines (T) or the combination of the two bases; the thickness of the carbon nano-tube film is 2nm to 500nm; and the square resistance value is 0.5k to 50k ohm / sq. The preparation method comprises the following procedures: soaking the anodized aluminum substrate into the DNA solution of a single-walled carbon nano-tube for 0.5h to 96h; and self-assembling on the surface of the substrate to form the carbon nano-tube conducting film. The invention has the advantages that the preparation is simple, and the obtained carbon nano-tube conducting film is uniform and stable with good conductivity and certain light transmittance.

Description

technical field [0001] The invention belongs to the field of preparation of carbon nanotube films. In particular, it relates to a carbon nanotube film supported on an aluminum substrate and a preparation method thereof. Background technique [0002] Carbon nanotubes have a unique structure. The p electrons of carbon atoms form a large range of delocalized π bonds. Due to the significant conjugation effect, carbon nanotubes have some special electrical properties. Under a specific structure, carbon nanotubes exhibit good electrical conductivity, which can reach 10,000 times that of copper. Since the carbon nanotube film is both conductive and transparent, has good flexibility and large surface area, it is very suitable for organic light-emitting diodes, transparent electrodes for flat panel displays, and electrodes for solar cells. The prepared carbon nanotube transparent conductive film can be used as a substitute for ITO (indium tin oxide). ITO is currently the most comm...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C20/00C25D11/04C25D11/12
Inventor 杨全红郭敏张少波
Owner TIANJIN UNIV
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