Photoluminescence characterization of Er‐implanted Al2O3films

synthesis and characterization of some macrocyclic schiff bases

ماکروسیکلهای شیف باز از اهمیت زیادی در شیمی آلی و دارویی برخوردار می باشند. این ماکروسیکلها با دارابودن گروه های مناسب در مکانهای مناسب می توانند فلزاتی مثل مس، نیکل و ... را در حفره های خود به دام انداخته، کمپلکسهای پایدار تولید نمایند. در این پایان نامه ابتدا یک دی آلدئید آروماتیک از گلیسیرین تهیه می شود و در مرحله بعدی واکنش با دی آمینهای آروماتیک و یا آلیفاتیک در رقتهای بسیار زیاد منجر به ت...

Reflectance and photoluminescence characterization of BexZn1 xTe epilayers

BexZn1 xTe thin films were grown on InP substrates by molecular beam epitaxy (MBE). Optical properties of the epilayers were studied using reflectance and photoluminescence (PL) measurements. An increase in the full width at half maximum of the emission line with the increase in BeTe content was observed and explained by the disorder-induced broadening. The temperature dependence of the band ga...

Microwave Synthesis, Characterization, and Photoluminescence Properties of Nanocrystalline Zirconia

We report synthesis of ZrO₂ nanoparticles (NPs) using microwave assisted chemical method at 80°C temperature. Synthesized ZrO₂ NPs were calcinated at 400°C under air atmosphere and characterized using FTIR, XRD, SEM, TEM, BET, and EDS for their formation, structure, morphology, size, and elemental composition. XRD results revealed the formation of mixed phase monoclinic and tetragonal ZrO₂ phas...

Lowtemperature epitaxial growth and photoluminescence characterization of GaN

Photoluminescence characterization of MBE grown Zn 1 ~ x Be x

We report photoluminescence (PL) studies of high-quality Zn 1~x Be x Se "lms grown by molecular beam epitaxy (MBE) on GaAs substrates by use of a novel growth method of Be}Zn co-irradiation before the growth of a thin ZnSe bu!er layer. Samples show double-crystal X-ray linewidth as narrow as 23 arcsec. Low-temperature (13K) PL of undoped samples showed free exciton emission, which de"ned the ba...