Evaluation of field electron emission properties of ZnIn2S4 nanopetals grown on conducting carbon substrate

Field Electron Emission Experiments with Cold-Sprayed Cu-SiC Composite Coatings

“…The most frequently used materials for films and coatings are-(i) different forms of carbon (e.g., graphene [25], diamond [26][27][28], carbon nanofibers [29] or nanotubes [30]) deposited by dip coating [25], plasma-enhanced chemical vapor deposition (PECVD) [26,29], sludge printing [30] or electrodeposition [27,28], and (ii) complex alloys and materials (e.g., ZnIn 2 S synthesized from zinc nitrate (Zn(NO 3 ) 2 •6H 2 O), indium nitrate (In(NO 3 ) 3 •H 2 O) and thiourea ((NH 2 ) 2 CS) [31], perovskites as SrTiO 3 [32], composite coating made from mixtures of CeO 2 , B 4 C, and PSON (mixture of polysiloxane and polysilazan) [33]) deposited by hydrothermal [31] or chemical [33] synthesis, or vacuum electron beam physical vapor deposition (EBPVD) technique [32,34]. Some of the processes are time consuming, such as chemical synthesis with long-time curing for 3 days [33], hydrothermal synthesis with a duration of 15 h [31]. Some others are expensive, such as the EBPVD [32,34] or PECVD technique [26,29].…”

Enrichment of the field emission properties of NiCo2O4 nanostructures by UV/ozone treatment

“…The emission current stability for UV treated NiCo2O4 emitter is found to be very good and characterized by a very low number of fluctuations about the mean current value (~ µA) compared to pristine one. The fluctuations can be attributed to adsorption/ desorption of residual gaseous species on the emitter surface [48]. FE image is shown in inset For this simulation, we have considered the spinel structure of NiCo2O4 whose DFT optimized bulk structure is displayed in Figure 5 To get the modification in electronic properties, in Figure 6 we have plotted electronic density of states for pristine NiCo2O4 and NiCo2O4 with O vacancy.…”