ABSTRACT
In the field of nanomaterials, one-dimensional structures such as nanotubes, nanowires, and nanofibers have been widely studied due to their unique properties that enable new-generation applications at nano-, micro-, and macroscale dimensions. The nanowires (NWs) are also prominent 1D nanostructures that possess unique electrical, thermoelectrical, optical, magnetic, mechanical, and chemical properties to name but a few. In general, an nanotube is a nanostructure with tubular shape and high aspect ratio, having diameter in nanometers but length in micrometers. This nanostructure has been synthesized, studied, and reported by several researchers since 1952, including Iijima who published a detailed analysis of carbon nanotubes (CNTs) in 1991. The CNTs can be synthesized by arc-discharge method with fewer structural defects in comparison with other techniques. Arc-discharge method produces higher temperatures, resulting in expansion defects of CNTs. The laser ablation technique uses a high-power YAG-type laser as energy source to evaporate the graphite target, which could contain metal particles as catalyst.
