Monoclinic Zirconium Oxide Nanostructures Having Tunable Band Gap Synthesized under Extremely Non-Equilibrium Plasma Conditions

Abstract

Zirconium oxide (ZrO2) is a wide and direct band gap semiconductor used for the fabrication of optoelectronic devices. ZrO2 based optoelectronic devices span a wide optical range depending on the band gap of ZrO2 material. The band gap of ZrO2 can be tuned by fabricating it to the nanoscale. In this paper, we synthesized the ZrO2 nanostructures on quartz substrate using ZrO2 ions produced by the ablation of ZrO2 pellet due to high temperature, high density, and extremely non-equilibrium argon plasma in a modified dense plasma focus device. Uniformly distributed monoclinic ZrO2 nanostructures with an average dimension of ~14 nm were obtained through X-ray diffraction and scanning electron microscopy studies. The monoclinic phase of ZrO2 nanostructures is further confirmed from photoluminescence (PL) and Raman spectra. PL spectra show peaks in ultra-violet (UV), near-UV, and visible regions with tunable band gap of nanostructures. A similar tunability of band gap was observed from absorption spectra. The obtained structural, morphological, and optical properties are compared to investigate the potential applications of ZrO2 nanostructures in optoelectronic devices.

Microstructure and Oxidation Behavior of the Oxide Dispersion Strengthened Stainless Steel 316l With Zirconia Dispersion

“…The XRD pattern of 316L powder has the three highest peaks at the diffraction angles 011), (002), and (003) planes are the peaks of ferrite reflection [10], [11], respectively. However, the XRD pattern of the ZrO2 material is dominantly identical to the study conducted by Onkar Mangla and Savita Roy [12] Several XRD patterns are shown in the figure below for samples of SS 316L (namely 316L steel) and SS 316L + ZrO2 (namely 316-ODS steel). The presence of Austenite peaks (FCC) and several ferrite peaks (BCC) in the diffractogram pattern for 316L steel makes further discussion in the XRD pattern refinement, as shown in Figure 2.…”

A Novel Method of 3D Printing High‐Loaded Oxide/H‐ZSM‐5 Catalyst Monoliths for Carbon Dioxide Reduction in Tandem with Propane Dehydrogenation

“…[ 25 ] A small new peak at 2θ = 42° was also present, which signifies the (120) index of nanoscale ZrO 2 . [ 26 ] In Ga 15 /ZSM‐5, additional peaks were observed at 2θ = 35°, 39°, and 65°, which correspond to the (111), (‐310), and (403) planes, respectively, in Ga 2 O 3 rods. [ 27 ] In V 15 /ZSM‐5, complete losses in both the diffractive index at 2θ = 7° as well as across any of the minor diffractive indices throughout the entire spectra, were observed.…”

Improvements of Arboblend V2 Nature Characteristics through Depositing Thin Ceramic Layers

“…The P3-143-9 passes sample (blue diffractogram) has a strong crystalline aspect due to the large amount of zirconium dioxide particles present in the structure of the ceramic powder. Thus, to the ZrO2 compound can be assigned the peaks from 2θ = 31.14°, 38.43°, 60°, 82° and 84.78° [46,52,53]. Titanium dioxide, as in the case of the P9-136-9 passes sample, is found at angles of 27.43°, 28.34°, 63.02° and 74.41° [54,55].…”

“…The P9-136-9 passes sample (red diffractogram) shows diffraction maxima associated with the presence of the polymer matrix, which has in its structure polylactic acid (16.73°) and lignin or natural fibers (19.04°) [53,57]. Diffraction angles corresponding to the coating with ceramic micropowder are also visible: The specific peaks to Cr2O3 crystallization at 2-theta angles of low intensity are 30.35°, 31.70 °, 35.16 °, 50.48° and 54.12° [47][48][49]58].…”