A step toward production of smaller diameter single wall carbon nanotubes

Abstract

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

The Study of Electrical Transport in Rubber Blends Filled by Single Wall Carbon Nanotubes

“…We are standing before a new challenge in rubber industry created by the application of carbon nanotubes to a rubber blend. The technological process of a carbon nanotubes (CNT) production is relatively well understood [1,2]. The physical structure and properties of carbon allotropes are described in detail for instance in the work [3].…”