Search results for "ZNO"
showing 10 items of 264 documents
Preparation and photocatalytic activity of ZnO-SnO2, ZnO-ZnWO4 and SnO2-ZnO-ZnWO4 nanocomposites
2014
Fabrication and characterization of micrometer-scale ZnO memristors
2015
Memristors are an interesting class of resistive random access memory (RRAM) based on the electrical switching of metal oxide film resistivity . They are characterized for exhibiting resistive switching between a high-resistance state (HRS) and a low-resistance state (LRS) and have been recently considered as one of the most promising candidates for next-generation nonvolatile memory devices because of their low power consumption, fast switching operation, nondestructive readout, and remarkable scalability. The device structure is simply an oxide layer sandwiched between two metal electrodes. The switching behaviour is dependent both on the oxide material and the choice of metal electrodes.…
Pulsed laser deposition of ZnO and VO2 films for memristor fabrication
2015
Memristors are resistive switching memory devices which have attracted much attention over the last years for high-density memory applications because of their simple structure, small cell size, high speed, low power consumption, potential for 3-D stacking and excellent compatibility with the complementary metal-oxide-semiconductor (CMOS) technology [1]. Beside nonvolatile memory applications, memristors have been also proposed for other different applications including biosensors [2] and neuromorphic [3] circuits. The device structure is simply an oxide material sandwiched between two metal electrodes. The switching behavior is not only dependent on the oxide material but also on the choic…
Investigation of electrodeposited ZnO thin films as transparent conducting oxide for application in CIGS-based solar cells
2012
"To ńyma nasz fajer!", czyli o śląskiej polityczności. Elementy integracji i dezintegracji w procesie kształtowania się fenomenu śląskiej etniczności
2022
Przedmiotem artykułu jest analiza elementów integracji i dezintegracji w procesie kształtowania się fenomenu śląskiej etniczności. Autorka proponuje teoriopolityczną interpretację procesów, jakie zaszły na Górnym Śląsku w ostatnich trzech dekadach. W tym celu proponuje posłużenie się kategorią śląskiej polityczności, która ma oddawać specyfikę życia politycznego w regionie. Te jest oparte na wielokierunkowych relacjach podmiotów politycznych wyrażonych w diadzie integracja-dezintegracja. Stanowi ona schemat interpretacyjny pozwalający je opisać w negatywnej zależności, gdy integracja jednego podmiotu jest uwarunkowana dezintegracją drugiego. W tekście autorka proponuje ustrukturyzowanie życ…
Low-cost high-haze films based on ZnO nanorods for light scattering in thin c-Si solar cells
2015
Light scattering from ZnO nanorods (NR) is investigated, modeled, and applied to a solar cell. ZnO NR (120-1300 nm long, 280-60 nm large), grown by low-cost chemical bath deposition at 90 degrees C, exhibit diffused-to-total transmitted light as high as 70% and 30% in the 400 and 1000 nm wavelength range, respectively. Data and scattering simulation show that ZnO NR length plays a crucial role in light diffusion effect. A transparent ZnO NR film grown on glass and placed on top of a 1 mu m thick c-Si solar cell is shown to enhance the light-current conversion efficiency for wavelengths longer than 600 nm. (C) 2015 AIP Publishing LLC.
4 - 5 gadīgu bērnu plānošanas prasmju sekmēšana gleznošanā
2022
Signe Ungure bakalaura darbā “ 4 – 5 gadīgu bērnu plānošanas prasmju sekmēšana gleznošanā”, kas izstrādāts Dr. paed. Dagnijas Vigules vadībā, tiek pētīta plānošanas prasmju būtība, un tās sekmēšana gleznošanā. Bakalaura darba mērķis ir teorētiski un praktiski pētīt plānošanas prasmju attīstības iespējas gleznošanā 4 – 5 gadīgiem bērniem. Lai pierādītu darbā izvirzīto hpotēzi, autore ir veikusi teorētisko un praktisko pētījumu. Bakalaura darbs sastāv no 2 nodaļām un 6 apakšnodaļām, secinājumiem, un, noslēgumā, tiek sniegti ieteikumi pedagogiem šīs prasmes attīstīšanai saviem audzēkņiem. Pirmajā nodaļā tiek analizēta teorija par plānošanas prasmju būtību un attīstīšanas iespējām praktiskajā d…
Supercritical hydrothermal synthesis of ZnO nanopowders beyond the critical point : understanding of nucleation and growth steps
2014
The supercritical hydrothermal synthesis of nanopowders (especially metal oxide) has been widely studied. To the best of our knowledge, no nanoparticle formation mechanism has been published yet. In this prospect, this study is dedicated to the understanding of metal oxide nanoparticle nucleation and growth mechanisms. For this purpose, zinc oxide is used as a model material. First, the influence of synthesis operating conditions such as pressure, temperature, pH, precursor concentrations and solution flow rates on particle morphological properties (size, particle size distribution or morphologies) has been investigated. Hence, two approaches have simultaneously been carried out. The first …
Controlled synthesis of linear and branched Au@ZnO hybrid nanocrystals and their photocatalytic properties.
2013
Colloidal Au@ZnO hybrid nanocrystals with linear and branched shape were synthesized. The number of ZnO domains on the Au seeds can be controlled by the solvent mixture. Imidazole-functionalized Au@ZnO hybrid nanocrystals were soluble in water and exhibited a greatly enhanced photocatalytic activity compared to ZnO nanocrystals. The pristine heterodimeric NPs were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-Vis spectroscopy.
Propozycja regionalizacji fizycznogeograficznej Sudetów Wschodnich
2018
Artykuł przedstawia propozycję wyznaczenia granic Sudetów Wschodnich oraz podziału fizycznogeograficznego makroregionu na mezoregiony. Przy wyznaczaniu granic uwzględniono w większym stopniu genetyczno-geologiczny podział Sudetów związany z orogenezą waryscyjską. W podziale na mezoregiony w większym stopniu uwzględniono kryteria litostratygraficzne.