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- Title
OPTICAL AND FIELD EMISSION PROPERTIES IN DIFFERENT NANOSTRUCTURES OF ZnO.
- Authors
Singh, Jai; Kumar, P.; Ramam, Kouduri; Late, Dattatray J.; More, M. A.; Joag, D. S.; Tiwari, R. S.; Srivastava, O. N.
- Abstract
ZnO nanostructures with different morphologies e.g. nanotetrapods, nanorods, nanocombs and nanoaeroplanes has been fabricated by evaporation of pure zinc powder without catalysts in the temperature range of 400∼900 °C. The structures and properties of obtained products were examined using scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, room temperature photoluminescence and field emission. Photoluminescence spectra showed an ultravoilet-green emission and strong orange-red emission peaks at room temperature. The field emission studies of the as grown nanocombs revealed that threshold field, required to draw a current density of ∼1.0 μA/cm² is ∼ 1.4 V/μm. An emission current density of ∼9.05 μA/cm² has been drawn from nanocombs at an applied electric field of ∼ 1.92 V/μm. The field enhancement factor found to be ∼8050, indicating that the electron emission from nanometric dimension of the emitter. Such, ZnO nanostructures are likely to be candidates as building blocks for constructing photonic and flat panel display.
- Subjects
FIELD emission; NANOSTRUCTURED materials; ZINC powder; SCANNING electron microscopy; TRANSMISSION electron microscopy; X-ray diffraction
- Publication
Digest Journal of Nanomaterials & Biostructures (DJNB), 2012, Vol 7, Issue 2, p525
- ISSN
1842-3582
- Publication type
Article