RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

Abstract

We have reviewed the synthesis of nanocomposite zinc oxide deposited carbon nanotube with two different methods. Initially the multi-walled carbon nanotubes (MWCNT) were prepared by the plasma enhanced chemical vapour deposition technique. Then By two different methods ZnO layers were coated on the tubes. RF sputtering was one of the ways to directly deposit ZnO thin layer on the MWCNTs. On the other hand, we used the thermally physical vapour deposition for making thin Zn film to oxidize it later. Scanning electron microscopy and also Raman spectroscopy measurements of the prepared samples confirmed the presence of ZnO nanolayers on the CNT bodies. By the field emission microscopy measurements we found that ZnO deposited CNTs have a more efficient emissivity than that of CNTs alone.

Phage-Directed Synthesis of Photoluminescent Zinc Oxide Nanoparticles under Benign Conditions

“…Nanoparticles (NPs) obtained in physical processes are generally of lower quality as compared to their counterparts produced by chemical methods. Moreover, to obtain NPs with the use of physical methods, expensive vacuum systems, or equipment (plasmas) are usually required . On the other hand, the major drawback of chemical methods is the low stability and self-aggregation of the final product, which necessitates the addition of surfactants and stabilizers .…”

“…Moreover, to obtain NPs with the use of physical methods, expensive vacuum systems, or equipment (plasmas) are usually required. 24 On the other hand, the major drawback of chemical methods is the low stability and self-aggregation of the final product, which necessitates the addition of surfactants and stabilizers. 13 Hence, chemical synthesis methods give rise to the presence of toxic chemicals adsorbed on the surface of NPs, hindering the use of the final product in medical applications.…”