The Effect of Carbon Rod—Specimens Distance on the Structural and Electrical Properties of Carbon Nanotube

Abstract

The research studies the effect of the distance between the sample and the plasma sputtering source on the properties of the junction (silicon wafer-carbon nanotubes). The silicon wafer is fixed at (near, medium and far distances from the plasma source which is in the form of high purity graphite rod heated electrically). For the three cases, thickness of the sample is constant (20 nm). The samples were studied by scanning electron (SEM) and atomic force microscopes (AFM), X-ray and Raman spectra. For optimum distances the carbon layer is in the form of multi wall carbon nanotube (MWCNT). SEM images shows no formation of CNT on the Si wafer for near distance, which is consistent with the AFM images, X-ray and Raman spectrograms and no existence of characteristics (002) peaks whereas it appears for medium and longer distances, and by experience the optimum distance was found. This means that at closer distance high energy and high intensity plasma particles prevent the formation of CNT. This effect decreases with increasing distance of substrate from the graphite rod.

Determination of Output Power of Si–CNT Solar Cell

“…Figure 3 show the scanning electron microscope (SEM) images of the carbon layers. The images showed aggregates of carbon nanoparticles, which took the form of clusters, and also showed a slight change in the size of the grains with the change in the thickness of the carbon layer, this is due to the fact that the plasma during the deposition process scrapes the carbon layer as a result of the proximity of the samples surfaces to the plasma, which will negatively affect the growth of the grains [17].…”

Preparation of ZnTe thin films using chemical bath deposition technique

“…Chemical bath deposition technique was used to prepare ZnTe thin films on glass substrate. The substrates were cleaned using different cleaning and solvent solutions [18,[22][23][24].…”