کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1645602 | 1517294 | 2013 | 4 صفحه PDF | دانلود رایگان |
ZnO nanowires with high density are grown over zinc foil by thermal evaporation process at relatively low temperature. Electron microscopy studies confirmed that the as-grown nanowires are of single crystal hexagonal wurtzite structure, growing preferentially in the c-axis direction. The Raman spectrum of the ZnO nanowires shows an optical-phonon E2 mode at 440 cm−1 confirming good crystallinity for the grown nanowires. The field emission measurement indicated that ZnO nanowires have a turn-on field of 9.1 V/μm at current density of 0.001 μA/cm2.
► The annealing of the Zn foil gives optimum growth of nanowires (NWs) and very thin.
► The ZnO NWs grown on the Zn foil substrate are under compressive stress.
► The turn-on and emission current would be improved by growing well-aligned ZnO NWs array.
Journal: Materials Letters - Volume 93, 15 February 2013, Pages 326–329