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.

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