沉积法掺金改善碳纳米管电接触特性

doi:10.19665/j.issn1001-2400.2019.01.024

Abstract

Abstract:

The effect of doping metal gold into carbon nanotubes (CNTs) by the deposition method on the electrical contact characteristics between CNTs and metal electrodes is studied. First, defects and oxygen-containing functional groups are made by acid reflux on the surface of CNTs, and the CNT dispersion is prepared. Then, the gold sol solution is prepared by mixing the sodium citrate and chloroauric acid, and the prepared CNT dispersion is dropped into the gold sol solution to produce the samples of gold nanoparticle-doped CNTs by oscillating deposition. Scanning electron micrographs and infrared absorption spectra reveal that the acid treatment is successful in constructing some defects and hydrophilic functional groups on the walls and ends of CNTs. The morphological characterization and X-ray photoelectron spectroscopy demonstrate that gold nanoparticles are successfully doped on the surface and ends of CNTs. The increase in the G-band wavenumber of the Raman spectrum of the gold-doped CNTs indicates that the doping type is the p-type. Finally, dielectrophoresis is used to assemble the original and gold-doped CNTs between the gold electrodes, and the contact resistance is measured in real time. The results show that Au doping by the deposition method can reduce the contact resistance between CNTs and gold electrodes, and that the average resistance decrease is 71.49%.

Key words: carbon nanotubes, electroless deposition, doping, gold nanoparticles, contact resistance

CLC Number:

TN305.3

SUN Mengmeng,CHANG Chunrui,ZHANG Zhiming,ZHANG Yadong,AN Libao. Study of improving the electrical contact performance of carbon nanotubes by doping Au using the deposition method[J].Journal of Xidian University, 2019, 46(1): 151-157.

Figures/Tables 6

References 26

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Study of improving the electrical contact performance of carbon nanotubes by doping Au using the deposition method

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