An all-optical terahertz absorption technique for nondestructive characterization of nanometer-scale metal oxide thin films grown on silicon substrates is described. Example measurements of laser-deposited TiO2 and atomic layer-deposited films of HfO2 are presented to demonstrate applicability to pure Y2O3, Al2O3, and VOx and mixed combinatorial films as a function of deposition conditions and ...

A robust hydrophobic Y2O3 coating at high temperatures is important for industrial applications. In this study, thin films on Si substrates were prepared by reactive direct current magnetron sputtering. By changing the deposition power, with different microstructures obtained in poison mode and metallic mode, respectively. order to understand effect of heat treatment microstructure hydrophobici...

Impregnation and deposition-precipitation syntheses have been used to obtain Y2O3/SiO2 samples. In the deposition method, the urea causes the precipitation of yttrium hydroxide, which leads to the formation of yttria nanocrystalline particles in the final composites. Delaying the silica addition up to the visible muddying of the solution, a relevant formation of yttria nanocrystalline particles...

In this work, Y2O3–Al2O3 dielectrics were prepared and used in ZnO thin film transistor as gate insulators. The Y2O3 by the sol–gel method has many surface defects, resulting a high density of interface states with active layer TFT, which then leads to poor stability devices. We modified it atomic deposition (ALD) technology that deposited Al2O3 on dielectric layer, finally fabricated TFT devic...

NMR spin echo measurements of 13C in C60, 89Y in Y2O3, and 29Si in silicon are shown to defy conventional expectations when more than one pi pulse is used. Multiple pi-pulse echo trains may either freeze out or accelerate the decay of the signal, depending on the pi-pulse phase. Average Hamiltonian theory, combined with exact quantum calculations, reveals an intrinsic cause for these coherent p...

The main purpose of this study was to fabricate carbon nanotubes (CNTs) reinforced zircon­nium yttrium coatings on boiler tube steel and investigate the microstructural mechanical properties these coatings. Plasma sprayed conventional ZrO2-Y2O3, ZrO2-Y2O3 1 wt.% CNT 4 were prepared deposited successfully material T-91 (ASTM SA-213) by plasma thermal spray technology. Microhardness, porosity, XR...

Nanoparticles suspended in polymeric host materials are found to have tremendous potential for various photonic and biological applications due to their unique material properties. Polymethyl methacrylate (PMMA) is known to be one of the best vinyl polymers owing to its excellent dimensional quality, weather resistance, easiness of synthesis, resistance to laser damage, and high mechanical stre...