Abstract We report here the field emission studies of a layered WS 2 -RGO composite at base pressure ~1 × 10 −8 mbar. The turn on required to draw current density 1 μA/cm is found be 3.5, 2.3 and V/μm for , RGO respectively. enhanced behavior observed nanocomposite attributed high enhancement factor 2978, which associated with surface protrusions single-to-few layer thick sheets nanocomposite. highest ~800 drawn an applied 4.1 from few layers Furthermore, first-principles functional...

Abstract Field emission studies are reported for the first time on layered MoS 2 sheets at base pressure of ∼1 × 10 −8 mbar. The turn‐on field required to draw a current density μ A/cm is found be 3.5 V/ m sheets. values significantly lower than nanoflowers, graphene, and carbon nanotube‐based emitters due high enhancement factor (∼1138) associated with nanometric sharp edges sheet emitter surface. current–time plots show good stability over period 3 h. Owing low planar (sheetlike)...

We report field electron emission investigations on pulsed laser-deposited molybdenum disulfide (MoS2) thin films W-tip and Si substrates. In both cases, under the chosen growth conditions, dry process of laser deposition (PLD) is seen to render a dense nanostructured morphology MoS2, which important for local electric enhancement in application. case MoS2 film silicon (Si), turn-on required draw an current density 10 μA/cm(2) found be 2.8 V/μm. Interestingly, tungsten (W) tip emitter...

Field emission studies have been carried out on undoped as well N- and B-doped graphene samples prepared by arc-discharge method in a hydrogen atmosphere. These exhibit very low turn-on fields. N-doped shows the lowest field of 0.6 V/μm, corresponding to current density 10 μA/cm2. characteristics are superior other types nanomaterials reported literature. Furthermore, currents stable over period more than 3 h for samples. The observed behavior has explained basis nanometric features...

We report the synthesis of V₂O₅ nanosheets by a simple hydrothermal method.

We report here our experimental investigations on p-doped graphene using tin sulfide (SnS2), which shows enhanced field emission properties. The turn required to draw an current density of 1 μA/cm2 is significantly low (almost half the value) for SnS2/reduced oxide (RGO) nanocomposite (2.65 V/μm) compared pristine SnS2 (4.8 nanosheets. enhancement factor β (∼3200 and ∼3700 SnS2/RGO composite) was calculated from Fowler-Nordheim (F-N) plots, indicates that nanometric geometry emitter. versus...

Zinc oxide (ZnO) nanorods are grown hierarchically on cuprous (Cu2O) nanoneedles to form a Cu2O/ZnO hetero-nanobrush assembly. This increases the overall aspect ratio, which helps enhance field emission properties of system. Also, charge separation and transport facilitated because multiple p–n junctions formed at p-Cu2O/n-ZnO interfaces quasi-1-D structures both materials, respectively. significantly photocatalytic properties. As compared only Cu2O nanoneedles, shows excellent improvement...

Abstract Herein we report field emission (FE) investigations on an electrochemically exfoliated few‐layered black phosphorus nanosheet emitter at a base pressure of approximately 1 × 10 –8 mbar. The turn‐on electric required to draw current density μA/cm 2 is found be about 4.2 V/μm. Furthermore, emitters deliver 170 applied 7.5 vs. time plot measured preset values 5 μA shows fluctuations within ±10 % the average value, indicating highly stable nature emitter. Thus, 2D nanosheets synthesized...

2-D Ti3C2TX MXene nanosheets are obtained by etching Ti3SiC2 MAX phase that is synthesized heating the elemental Ti, Si, and C mixture at high temperature. The electron emission behavior of both studied. exhibits excellent field characteristics with a turn-on 4.7 V μm–1, for 6.5 μm–1. electric corresponding to an current density 10 μA cm–2 5.0 μm–1 7.5 phase. calculated enhancement factor ∼4280, which one highest reported factors date. In order get theoretical insight into properties Ti3C2...

A simple method of vapor deposition for the shape selective synthesis ZnO structures, namely, multipods, submicron wires, and spheres, has been successfully demonstrated. plausible growth mechanism based on studies scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS) is proposed. Our suggest that a multipod structure governed by screw dislocation propagation while vapor−liquid−solid (VLS) responsible formation wires spheres....

Single-crystalline ultralong tin sulfide (SnS) nanowires has been grown by a thermal evaporation technique under optimized conditions on gold-coated silicon substrates, and for the first time, field emission investigations SnS at base pressure of 1 × 10–8 mbar are reported. It revealed that surface morphology as-synthesized nanostructures is significantly influenced deposition temperature duration. Structural morphological analyses have carried out using X-ray diffraction (XRD), scanning...

Electron emission properties of multilayer graphene (MLG) prepared by a facile exfoliation technique have been studied. Effect CO2 Ar, N2, plasma treatment was studied using Raman spectroscopy and investigated for field based application. The treated shows an enhanced behavior with low turn on 0.18 V/μm high current density 1.89 mA/cm2 at applied 0.35 V/μm. Further the MLG exhibits excellent stability lower higher value.

The field emission of individual ZnO multipods and a single arm multipod structure grown by vapor deposition were carried out. A current 1 nA with an ultralow onset voltage 40 V was observed repeatedly for the as well arm. nonlinearity in Fowler–Nordheim plots have been interpreted on basis theory electron from semiconductors scheme explaining behavior both high- low-field regions owing to very high geometrical factor has picturized.

Field emission measurements of current−voltage characteristics are reported for tetrapod structures ZnO. The nonlinear Fowler−Nordheim (FN) plot is analyzed according to a model calculation based on saturation conduction band current and predominance valence at high-field values. simulated FN exhibits similar features those observed experimentally. suggests that the slope variation plot, in low-field regions, does not depend magnitude saturation. Instead, it characteristic energy structure...

High-quality self-assembled V(2)O(5) nanofiber-bundles (NBs) are synthesized by a simple and direct hydrothermal method using vanadium(v) hydroxylamido complex as vanadium source in the presence of HNO(3). The possible reaction pathway for formation NBs is discussed demonstrated that HNO(3) functions both an oxidizing acidification agent. single-crystals orthorhombic phase have grown along [010] direction. A bundle made indefinite numbers homogeneous nanofibers where lengths up to several...

The present investigation explores the controlled architecture of a CeO2–ZnO nanocomposite via template-free, low temperature, facile single step solvothermal approach. This complex depicts cubic crystalline CeO2 nanoparticles (size ∼15 nm) grown on edges tapered ZnO nanorods with definite orientations and alignments. formation wurtzite ZnO, coexistence Ce3+ Ce4+ surface nanocomposites are confirmed using various characterization tools. finding such unique nanostructures by method is...

Spinel ZnCo₂O₄microflowers were synthesized by a facile route and their field emission properties studied in detail. They showed intriguing Field performance terms of good field-enhancement factor stability.

Abstract We report first‐principles DFT calculations of the single‐layer VS 2 work function, experimental synthesis flower‐like few‐layer‐thick nanosheets by a simple one‐step hydrothermal method, and investigation their field emission properties. The turn‐on required to draw current densities 1 10 μA/cm were 4 5.01 V/μm, respectively. observed values are attributed high enhancement factor (ca. 2500), which is due presence sharp protrusions in nanosheets. Furthermore, field‐emission...

In the present work, we have investigated charge storage capacitive response and field emission behaviour of platinum (Pt) nanoparticles decorated on carbon nano onions (CNOs) compared them with those pristine onions.

Electron emission properties of electrodeposited ZnO nanosheet arrays grown on Indium tin oxide coated glass substrates have been studied. Influence oxygen vacancies electronic structures and field nanosheets are investigated using density functional theory. The produce unshared d electrons which form an impurity energy state; this causes shifting Fermi level towards the vacuum, so barrier for electron extraction reduces. exhibit a low turn-on 2.4 V/μm at 0.1 μA/cm2 current 50.1 applied 6.4...

The morphology tuning with synthesis temperature shows 2D nanosheet conversion into 3D slabs improved crystallinity promising proton insertion the layered crystal structure for better supercapacitor performance.