A step toward production of smaller diameter single wall carbon nanotubes

Materials Research

V. Lemos¹  D. Silva²  C.a. Luengo²  J.g. Huber²  J.m. Rosolen² 

[1] ,Universidade Federal do Ceará Departamento de Física Fortaleza CE ,Brazil

关键词: single-wall carbon nanotubes;    raman scattering;    high resolution transmission electron microscopy;   

DOI  :  10.1590/S1516-14392003000100003

来源: SciELO

【 摘 要 】

Single-wall carbon nanotubes were produced with, either, a bimetallic or a mixture of three catalysts. Raman scattering and high resolution transmission electron microscopy were used as characterization tools. The mixture LiNi0.5Co0.5O2 leaded to a sample relatively free from impurities with long bundles, each containing a few tubes. A narrow distribution of diameters for the sample produced with this mixture was evidenced by Raman scattering experiences. The mean tube diameter was found to be smaller than those measured for the nanotubes obtained with the bimetallic catalysts, Fe/Ni and Ni/Co. Possible chiralities were calculated for the semiconductor nanotubes formed. Assignments of the Raman radial breathing mode frequencies to the calculated structures are presented.

【 授权许可】

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