Controllable Ag nanoparticle coated ZnO nanorod arrays on an alloy substrate with enhanced field emission performance

Abstract

Ag–ZnO nanocomposites are conveniently prepared on alloy substrates, leading to much improved field emission performances.

Controlled Hetero‐Architectures of Au‐Nanoparticles‐Decorated ZnO Nanowires for Enhanced Field Electron Emission Displays

“…Au@ZnO nanorods have shown compatibly good performance than the Ag nanoparticle coated ZnO nanorods array. However, one should consider that the alloy substrate (details not mentioned in the manuscript) utilized might have backed up for better electron emission and also for lower E on in Ag@ZnO nanorods . Although Chang et al .…”

“…Therefore, interface engineering is imperative in determining the performance of the field electron emission devices. Inducing higher electric field, modifying emitter geometry, and impinging impurities without altering interfacial electronic structure are the emerging practices . Nevertheless, considering the moderate electric conductivity of most metal oxides, developing the one‐dimensional (1D) morphologies of the metal oxides and further decorating them with highly conducting metal/semiconducting nanoparticles is more feasible for fabricating field emission (FE) displays with improved emission ability.…”

“…Although, ZnO being one of them, moderately explored for FE displays owing to its large work function of 5.3 to 5.6 eV, limited hexagonal morphologies, random dispersion, and electron field screening effect . Larger work function of ZnO nanostructures was further tailored after doping with Ga, Mg, In, Al, Co, Cu, and C etc., or decorating with Ag, and annealing in different environments to improve the electron emission. The doping and annealing in different environment modify the electronic structure and significantly induce conductivity, are the motives for improved electron emission.…”

Spitzer shaped ZnO nanostructures for enhancement of field electron emission behaviors

“…[6][7][8][9] Therefore, emerging approaches to tailor the work function and improve electron emission such as the modication of emitter geometry, the introduction of impurity, decoration of metals and the vertical alignment of the structures have been reported. 2,10 The implantation of elements into ZnO nanowires was found to produce nanoscale protuberances and surface-related defects which reduced the turn-on eld (E on ) from 3.1 to 2.4 V mm À1 (at 0.1 mA cm…”

“…5.5 eV), 33 Ag decorated ZnO nanorods (i.e. 4.7 eV), 10 and Au faceted oxygen-decient ZnO nanostructures. 24 In the present case, the reduction in work-function is thought to originate from the spitzer shaped truncated tip morphology which might have helped enhance the FE behavior of the ZnO nanowires.…”