西安电子科技大学学报（自然科学版）2019，Vol.46Issue(1)：151-157,7.DOI:10.19665/j.issn1001-2400.2019.01.024
沉积法掺金改善碳纳米管电接触特性
Study of improving the electrical contact performance of carbon nanotubes by doping Au using the deposition method
摘要
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 oxygencontaining 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％.关键词
碳纳米管/无电沉积/掺杂/金纳米粒子/接触电阻Key words
carbon nanotubes/electroless deposition/doping/gold nanoparticles/contact resistance分类
信息技术与安全科学引用本文复制引用
孙蒙蒙,常春蕊,张志明,张亚东,安立宝..沉积法掺金改善碳纳米管电接触特性[J].西安电子科技大学学报（自然科学版）,2019,46(1):151-157,7.基金项目
国家自然科学基金(51472074) （51472074）
河北省引进海外高层次人才"百人计划"(E2012100005) （E2012100005）
