Gas sensing properties of 3D mesoporous nanostructured ZnO thin films

Abstract

We successfully deposited a three dimensional (3D) mesoporous ZnO nanostructure on a glass substrate by using a hydrothermal method, and tested the material for its gas sensing performance.

Highly responsive and selective ppb-level NO2 gas sensor based on porous Pd-functionalized CuO/rGO at room temperature

“…The above redox reaction results in more electron depletion and more hole concentration, which dramatically reduces the resistance value of the sensor. The above reactions are as follows: 67 NO 2(gas) -NO 2(ads)…”

Modified SILAR Grown ZnO Films on p‐Si(100) with Enhanced Charge Separation for UV Light Sensing Application

“…Moreover, the spin-orbit splitting of Zn 2p is found around 23.0 eV, corresponding to the formation of Zn 2þ . [31][32][33][34][35] Figure 4b shows the XPS spectrum of O 1s state. The O 1s spectrum is deconvoluted, showing two peaks at binding energies of %529.5 and %531.5 eV.…”

“…Typically, ZnO emits characteristic PL emissions in the UV and visible regions. The characteristic PL in the UV region (appearing at a wavelength of %385 nm [34,35] ) is commonly attributed to near-band-edge (NBE) emission. In contrast, the usual broad PL emission in the visible region is associated to a significant concentration of defects.…”

“…In contrast, the usual broad PL emission in the visible region is associated to a significant concentration of defects. [34,35,45] In this PL study, to investigate the emission induced from the defects of ZnO nanostructured, a wide scan measurement was done only from 400 to 1000 nm. Figure 8 displays the PL spectra of ZnO grown on glass (ZG), and p-Si(100) (ZS) substrates.…”

Luminescence Properties of Nano Zinc Oxide Doped with Al(III) Ions Obtained in Microwave-Assisted Hydrothermal Synthesis

“…It is also used for production of varistors [11,12], sensors [13][14][15], semiconductors and due to a wide energy gap (3.37 eV) in optoelectronics [16][17][18][19][20][21][22]. Doping of such material with aluminum ions leads to another applications.…”