Dispersion and diameter separation of multi-wall carbon nanotubes in aqueous solutions.

Comparative studies on dispersing of multi-wall carbon nanotubes (CNTs) using two anionic surfactants (sodium dodecyl sulphate, SDS, and sodium dodecyl benzenosulfonate, SDBS) are presented. The studies were conducted on the surfactant concentrations that were close to the critical micelle concentration (CMC). The stability of CNTs suspensions obtained for surfactant solutions at concentrations lower than the CMC was investigated.

Single-walled carbon nanotubes synthesis: a direct comparison of laser ablation and carbon arc routes.

Carbon arc and chemical vapor deposition are at present the most efficient methods for mass production of single-walled carbon nanotubes. However, laser ablation is renowned for high quality nanotubes with narrow diameter distributions and hence is also of great interest. The aim of this work was to compare both the carbon arc and laser ablation techniques with respect to the quality--and relative yield of the produced SWCNTs.

Carbon encapsulated magnetic nanoparticles for biomedical applications: thermal stability studies.

Carbon encapsulated magnetic nanoparticles may find many prospective biomedical applications, e.g., in drug and gene delivery systems, disease detection, cancer therapy, rapid toxic cleaning, biochemical sensing, and magnetic resonance imaging.

Combustion synthesis as a novel method for production of 1-D SiC nanostructures.

1-D nanostructures of cubic phase silicon carbide (beta-SiC) were efficiently produced by combustion synthesis of mixtures containing Si-containing compounds and halocarbons in a calorimetric bomb. The influence of the operating parameters on 1-D SiC formation yield was studied. The heat release, the heating rate, and the chamber pressure increase were monitored during the process.

Formation of SWCnts in arc plasma: effect of graphitization of Fe-doped anode and optical emission studies.

Fe-doped (ca. 1 at%) homogeneous graphite electrodes (with different graphite microcrystallites, degree of graphitization and, thereby, electrical conductivities) were used to produce single-walled carbon nanotubes (SWCNTs) in Ar/Kr/Xe-H2 arc plasma under pressure equal to 26 kPa. The use of electrode with the smaller primary particle size (about 5 nm) comparing to the well-graphitized electrode (25 nm) drastically increased the yield of SWCNTs in Ar-H2 arc plasma, while plasma parameters (temperature, C2 content, and namely carbon vapor pressure) remained on similar levels.