The Influence Of Infrared Laser On Super-aligned Carbon Nanotubes And Graphene

Graphene, a two-dimensional crystal with only one carbon atomic layer’s thickness,has unique structure, mechanical and electronic properties. Carbon nanotube is wounded by a single layer graphene. These two kinds of materials have unique properties. Laser is a simple and effective heating method, which can change the properties about hydrophilicity of carbon nanotubes. In this work, we discuss the change of hydrophilicity on carbon nanotubes after laser treating, and the application in laser cleaning of graphene.Carbon nanotube is hydrophobic in nature. In this experiment, we extract super hydrophilic carbon nanotube films from the ultra-aligned carbon nanotube(SCNT) arrays.We use Nd:YAG laser system to scan SCNT films. And then test the changes of their hydrophobicity. By changing the laser scanning power and scanning rate parameters, the hydrophobicity of SCNT films can be regulated and controlled. In this way, the super hydrophilic SCNT films and the super hydrophobic SCNT films were prepared, which was helpful for the application of SCNT in biomedicine.Laser technology can clean micron and submicron particles. Clean surfaces are important to the electronic properties of devices based on graphene. In this paper, an Nd:YAG laser was used to directly irradiate mechanically exfoliated graphene flakes with SiO2/Si substrates. Results showed that several minutes of irradiation was able to remove impurity particles from the surface, and there is no defect peak of graphene induced in Raman spectra after laser cleaning. In this paper, a technique of laser cleaning graphene is developed. This method is simple and effective which is also a non-contact cleaning technology. A new method is provided for the cleaning of graphene devices.