Chemical and Laser Structuring of Carbon Nanotubes Arrays for Use in Biomedical Devices

Structuring effect of carbon nanotubes (CNT) arrays, processed with BaO and irradiated with nanosecond laser pulses was demonstrated. CNT arrays were synthesized by catalytic plasma-induced deposition from a gas phase on a silicon substrate. Effects of CNTs alignment, singling, splicing of nanotubes in a single structure were demonstrated. CNTs processing with BaO, laser and complex structuring were carried out. Chemical structuring of CNT arrays was performed by coating samples with 0.03 mg/ml aqueous Ba(NO3)(2) solution. Laser structuring of CNTs at a given area using impulse nanosecond Nd-YAG laser with radiation power 0.7 W, energy density 3.8 J/cm(2) is obtained. Raman spectroscopy was performed in order to show the small amount of defected nanotubes after laser irradiation. Electron emission of processed arrays was investigated. Application area of such materials includes: creating CNT-based biosensors, x-ray tubes for biomedical use, cathodes for electron emission, topological elements for medical devices.