کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5368228 | 1388388 | 2010 | 7 صفحه PDF | دانلود رایگان |
Carbon nanofibers were grown by electrodeposition technique onto aligned zinc oxide (ZnO) nanorods deposited by hybrid wet chemical route on glass substrates. X-ray diffraction traces indicated very strong peak for reflections from (0Â 0Â 2) planes of ZnO. The Raman spectra were dominated by the presence of G band at about 1597Â cmâ1 corresponding to the E2g tangential stretching mode of an ordered graphitic structure with sp2 hybridization and a D band at about 1350Â cmâ1 originating from disordered carbon. Fourier transformed infrared studies indicated the presence of a distinct characteristic absorption peak at â¼511Â cmâ1 for Zn-O stretching mode. Photoluminescence spectra indicated band edge luminescence of ZnO at â¼3.146Â eV along with a low intensity peak at â¼0.877Â eV arising out of carbon nanofibers. Field emission properties of these films and their dependence on the CNF coverage on ZnO nanorods are reported here. The average field enhancement factor as determined from the slope of the FN plot was found to vary between 1Â ÃÂ 103 and 3Â ÃÂ 103. Both the values of turn-on field and threshold field for CNF/ZnO were lower than pure ZnO nanorods.
Journal: Applied Surface Science - Volume 256, Issue 21, 15 August 2010, Pages 6172-6178