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Field emission studies of silver nanoparticles synthesized by electron cyclotron resonance plasma
Authors:Vishwas Purohit  Baishakhi MazumderAB Bhise  Pankaj PoddarDS Joag  SV Bhoraskar
Institution:a Department of Physics, University of Pune, Pune 411007, India
b Physical & Materials Chemistry Division, National Chemical Laboratory, Pune 411008, India
Abstract:Field emission has been studied for silver nanoparticles (25-200 nm), deposited within a cylindrical silver target in an electron cyclotron resonance (ECR) plasma. Particle size distribution was controlled by optimum biasing voltages between the chamber and the target. Presence of non-oxidized silver was confirmed from the X-Ray diffraction analysis; however, thin protective layer of oxide was identified from the selective area electron diffraction pattern obtained with transmission electron microscopy. The silver nanoparticles were seen to exhibit hilly pointed like structures when viewed under the atomic force microscopy (AFM). The emissive properties of these particles were investigated by field emission microscopy. It is found that this technique of deposition is ideal for formation of nanoparticles films on different substrate geometries with size controllability as well as its application to emission devices.
Keywords:Cold plasma  Nanoparticles  Field emission  Thin film
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