DAST-carbon nano tube composite film and preparation method thereof

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of photoelectric detection, can solve the problems of weak temperature sensitivity of resistance, weak photon response in terahertz band, and inferior sensitivity to organic thin films, etc.

Inactive Publication Date: 2012-11-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, carbon nanotubes also have some disadvantages, including weak response to photons in the terahertz band, weak temperature sensitivity of resistance (small TCR value), and less sensitivity to some special gases than organic films, etc.

Method used

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  • DAST-carbon nano tube composite film and preparation method thereof
  • DAST-carbon nano tube composite film and preparation method thereof
  • DAST-carbon nano tube composite film and preparation method thereof

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Embodiment Construction

[0038] The guiding ideology of the present invention is in the DAST-carbon nanotube composite film structure, utilizes carbon nanotube and DAST respectively excellent electrical and optical performance, prepares the composite thin film with more excellent overall performance (such as figure 1 shown), used in the manufacture of infrared or terahertz detectors, temperature sensors, gas sensors and other devices to improve the overall performance of the device.

[0039] The embodiment that the present invention prepares DAST-carbon nanotube composite film is as follows: 1. clean the substrate 1 of film growth, then dry with nitrogen; 2. carry out hydrophilic treatment to the substrate 1 cleaned through ①, then dry with nitrogen, Standby; ③Put the pre-prepared carbon nanotubes in a beaker, and use chemical treatment to introduce -COOH, -COH or -CONH on the surface of the carbon nanotubes 2and other special functional groups, and then, go through steps such as filtration, washing, ...

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Abstract

The invention discloses a 4-(4-dimethylaminostyryl)methylpyridine p-toluenesulfonate (DAST)-carbon nano tube composite film and a preparation method thereof. The film is formed by compounding a carbon nano tube and a DAST film. According to the invention, the DAST-carbon nano tube composite film is used for manufacturing the devices such as infrared or terahertz photoelectric detector, temperature sensor and gas sensor, the shortcomings of the pure carbon nano tube or pure DAST material in the performance of electrics, optics and the like can be overcome, and the comprehensive performance of the device is improved. The preparation method of the DAST-carbon nano tube composite film disclosed by the invention does not need complicated and expensive film forming equipment, reduces the manufacturing cost, improves the working performance of the device, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a DAST-carbon nanotube composite film and a preparation method thereof. Background technique [0002] In recent years, organic nonlinear optical materials have received extensive attention. Among them, 4-(4-dimethylaminostyryl)picoline p-toluenesulfonate (DAST for short) is an important organic nonlinear optical material. Optical materials, its second-order nonlinear coefficient at 1542nm is 840pm / V, and its electro-optic coefficient at 820nm is 75p / V, which is 1 to 2 orders of magnitude higher than the corresponding value of ZnTe, which is widely used at present. Due to the low dielectric constant of DAST, it has longer coherence length and faster response characteristics (see Li Yin, Zhang Jianxiu, Fu Peizhen, Wu Yicheng, "Growth, Morphology and Transmission Spectrum of Organic Nonlinear Optical Crystal DAST", artificial Acta Crystallographica, Vol....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04
Inventor 许向东黄龙蒋亚东孙自强范凯樊泰君何琼敖天宏马春前
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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