Visible light extinction was measured in a series of nitrogen-diluted, ethylene/air, non-premixed flames and this data was used to determine the optical band gap, OBG, as a function of flame position. Collimated light from a supercontinuum source is telescopically expanded and refocused to match the f- number of a dispersing monochromator. The dispersed light is split into a power metering chan...

Pure aluminum oxide (Al2O3) and zinc aluminum oxide (Zn x Al1-x O) thin films were deposited by atomic layer deposition (ALD). The microstructure and optical band gaps (E g ) of the Zn x Al1-x O (0.2 ≤ x ≤ 1) films were studied by X-ray diffractometer and Tauc method. The band offsets and alignment of atomic-layer-deposited Al2O3/Zn0.8Al0.2O heterojunction were investigated in detail using char...

Ternary alloyed Cd 0.7 Zn 0.3 Te colloidal quantum dots were synthesized under open atmosphere conditions. The characterized XRD studies, DLS technique and optical absorption measurements. Using tauc urbach relation the energy bandgap obtained. intensity depended nonlinear parameters of determined with Z-scan experimental setup using a green laser source working on continuous wave mode. coeffic...

Copper oxide and Zinc (Zn)-doped nanostructures (CuO-NSs) are successfully synthesized by using a hydrothermal technique. The as-obtained pure Zn-doped CuO-NSs were tested to study the effect of doping in CuO on structural, optical, antibacterial properties. band gap is calculated Tauc plot. Our results have shown that reduces with addition Zinc. Optimization processing conditions concentration...

The NiO-ZnO nanocomposite (NiO-ZnO NC) was synthesized by ecofriendly process using Diospyros kaki (D. kaki) extract of leaves as reducing and capping agents. X-ray diffraction (XRD) used for examined crystallinity, cell dimensions, crystallite size (7.6 nm). To determine the purity sample weight percentage, energy dispersive (EDX) is used. surface morphology determined scanning electron micros...

Parametrization models of optical constants, namely Tauc-Lorentz (TL), Forouhi-Bloomer (FB) and modified FB models, were applied to the interband absorption of amorphous carbon films. The optical constants were determined by means of transmittance and reflectance measurements in the visible range. The studied films were prepared by rf sputtering and characterized for their chemical properties. ...

Abstract The Tin dioxide nanoparticles (SnO 2 NPs) were synthesized by modified microemulsion method and screened for antibacterial antioxidant applications. crystalline nature was explored using x-ray diffraction (XRD) analysis the calculated crystallite size is 24.68 nm. morphology examined scanning transmission electron microscopies (SEM TEM) particles based on TEM image 79.10 elemental perf...

This study focuses on the modification of natural hydroxyapatite (HAp) derived from clamshell by impregnation with palladium (Pd) at different pH in wet precipitation method to produce photoactive green materials for degradation synthetic dyes. It was found that, 10, Pd has been successfully impregnated into HAp lattice Ca/P ratio 1.77 and particle distribution size range 40?470 nm. The resulte...

در بحث امدادرسانی به مصدومان بلایای طبیعی و غیرطبیعی، هدف اصلی یک زنجیره این است که اقلام موردنیاز مانند آب مواد غذایی، دارویی، پناهگاه سایر ملزومات سریع‌ترین زمان ممکن در­دسترس قرار بگیرد تا از تعداد مرگ‌ومیر ناشی وقوع بلایا حد امکان کاسته شود؛ بنابراین طراحی توسعه اجرایی­کردن می‌تواند نقش مهم بزرگی دست­‌یافتن پاسخ مناسب ایفا کند. بارزترین تفاوت‌ها برخورد با ، غیرقابل‌پیش‌بینی‌­بودن تقاضا نظر ...

Optical properties of spin-cast chitosan films were determined in the vacuum ultraviolet (VUV) through visible regions of the spectrum using spectroscopic ellipsometry. The onset of absorption in the ultraviolet was determined for chitosan films modified with succinic anhydride (SA) and glycidyl phenyl ether (GPE). This absorption was accounted for by including Gaussian and Tauc– Lorentz shaped...