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Carbon nanotubes (CNTs) have excellent performance in field emission; they can be used as field emission (FE) cold cathode. In this paper, we used thermal chemical vapor deposition to synthesize CNTs directly on the surface of traditional thermal-cathode; we changed the sputtering time of catalyst and found that it had a major impact on the emission properties, some discussion were also give.
Single-walled carbon nanotubes (SWCNTs) were grown by ethanol chemical vapor deposition (ECVD) and growth parameters were optimized using the Taguchi optimization technique. Optimized parameters such as catalyst, spin coating speed, temperature and flow rate of carrier gas are found to be cobalt (Co) and 5% nickel (Ni), 2000 rpm, 900??C, and 100 sccm (argon and 5% hydrogen), respectively. SWCNTs obtained...
Carbon nanotubes (CNTs) films were synthesized at low pressure using nickel as catalyst by thermal chemical vapor deposition with hydrogen-acetylene mixture. The Raman characteristics and morphological features of CNTs at different substrate temperatures were investigated. The variation of CNTs morphological feature mainly depends on the substrate temperatures. In the low temperature range (450-550degC),...
In this paper, novel and simple fabrication method of CNT field emitter by means of direct growth of CNT onto tungsten tip by CVD was developed. This method enables a fabrication of a high-quality CNT field emitter with simpler procedures than conventional methods. Aluminum (Al), nickel (Ni) and molybdenum (Mo) films were sequentially deposited onto a W tip with tip radius of ~ 0.1 micrometer. Ni...
The results of a study of multi-walled carbon nanotubes (CNTs) growth using two different chemical vapor deposition (CVD) techniques (low pressure plasma enhanced and atmospheric pressure thermal CVD) are presented. Thin films of Ni were used as a catalyst. The process of nickel nanoparticles formation during thermal pre-treatment of the catalyst was studied using AFM in a non-contact mode. The effect...
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