کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5368228 1388388 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth of carbon nanofibers on aligned zinc oxide nanorods and their field emission properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Growth of carbon nanofibers on aligned zinc oxide nanorods and their field emission properties
چکیده انگلیسی

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 (0 0 2) planes of ZnO. The Raman spectra were dominated by the presence of G band at about 1597 cm−1 corresponding to the E2g tangential stretching mode of an ordered graphitic structure with sp2 hybridization and a D band at about 1350 cm−1 originating from disordered carbon. Fourier transformed infrared studies indicated the presence of a distinct characteristic absorption peak at ∼511 cm−1 for Zn-O stretching mode. Photoluminescence spectra indicated band edge luminescence of ZnO at ∼3.146 eV along with a low intensity peak at ∼0.877 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 1 × 103 and 3 × 103. Both the values of turn-on field and threshold field for CNF/ZnO were lower than pure ZnO nanorods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 21, 15 August 2010, Pages 6172-6178
نویسندگان
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