Studies Of Synthesis Of SWCNTs By ACCVD Method And Raman Spectra Of Fullerene Material

Since the discovery in 1993, SWCNTs have been the subject of focused studies in many fields because of their unique structural, physical and chemical properties and hence remarkable potential as a new material in a wide range of applications. With this concern, the synthesis and characterization of SWCNTs have been an area of intense research since then.SWCNTs are produced by three main techniques: arc discharge, laser ablation and chemical vapor deposition (CVD). Nowadays, the CVD method appears to be a promising technique since it has the potential for a large-scale synthesis of high-quality SWCNTs at relatively low cost.Besides the SWCNTs, Fullerene C₆₀ and its derivatives have also aroused exhaustless interests of researchers ever since their discovery, not only because of their fantastic properties, but also because of their promising utility foreground as new material.Raman spectroscopy, which can be used as a powerful technique for providing high-quality spectra exhibiting fine structural detail of molecules, has been proved to be a valuable tool for characterizing SWCNTs. Information such as the structure and quality of the SWCNTs can be obtained from the Raman spectra. In addition, Raman spectroscopy has been playing an important role in characterizing C₆₀ and its derivatives.The followings are the main results obtained in this paper:1 , The SWCNTs were synthesized by the ACCVD (Alcohol Catalytic Chemical Vapor Deposition) method using the fluidized-bed as the reactor. The ethanol vapor was introduced into the fluidized-bed by the flow of Ar. Then the as-grown SWCNTs were characterized by Raman spectroscopy and TEM.2,A series of SWCNTs sample were synthesized with different flow rate of Ar at different reaction temperatures during the process of the synthesis. The effects of the Ar flow rate and the reaction temperature were studied using Raman spectroscopy and TEM.3 , Characterization of C₆₀ derivatives were presented using Raman spectroscopy. The results showed that the Raman spectrum is an effective method for study the fullerene derivatives.