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Field emission and photo-enhanced field emission characteristics of single crystalline tapered CdS nanobelts have been investigated. The turn-on field for the emission current density of ∼ 0.1 µA/cm2 is found to be ∼ 2.1 V/µm, which is much lower than reported values for various CdS nanostructures. The photo-enhanced field emission current shows a reproducible photo-switching behavior with rise in...
A single crystalline CdS submicron wire has been synthesized by simple thermal evaporation route. A non-linear and linear F-N plots have been observed for the single submicron CdS wire and multiple nanowires, respectively. The observed non-linearity can be attributed to the band structure of CdS. We believe that at low electric field electron emission is believed to be from the conduction band and...
Nanocrystalline RuO2 doped SnO2 thin film has been synthesized by thermal evaporation on tungsten tip. The surface morphology of the as deposited thin film on tungsten tip has been characterized by SEM. The SEM studies reveal the complete required to draw an emission current of 1nA was observed to be 2 kV. An emission current density of the order of 8.9 A/cm2 has been obtained at an applied voltage...
Boron doped diamond films were synthesized using microwave plasma chemical vapor deposition (MPCVD) technique. The films were characterized using field emission scanning electron microscopy and Raman spectroscopy. The B2O3 concentration is varied from 1000 to 5000 ppm. With increase in B2O3 concentration particle size decreases, for 5000 ppm it is found to be 30 nm. The turn on field required to draw...
Field emission and photo-sensitive field emission characteristics of single crystalline CdS nanowires have been investigated. The turn-on field for the emission current density of ∼ 0.1µA/cm2 is found to be ∼ 1.4 V/µm, which is much lower than reported values for various CdS nanostructures. Extremely stable field emission current is observed from CdS nanowires for the duration of 24 hrs with current...
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