Saeed Safa
Young researchers and elite groups
[ 1 ] - Structural, Optical and Ultra-Violet Photodetection Properties of ZnO Nanorods with Various Aspect Ratios
ZnO nanorods with various lengths were synthesized by a two-stage route (by changing the time of growth between 0-240 min) and were characterized using XRD, SEM, UV–Vis and PL techniques. The SEM and XRD results confirmed a fast growth of (0 0 2) plane in the preferential longitudinal orientation, in contrast to lateral growth and therefore, by increasing the time of hydrothermal growth, nanoro...
[ 2 ] - Investigating structural, optical and photocatalytic properties of hydrothermally synthesized ZnO nanorod arrays with various aspect ratios
ZnO nanorods with various aspect ratios (by changing the time of growth between 0-240 min) were synthesized using hydrothermal method and were investigated using XRD, SEM, UV–Vis and PL. It was found that growth time is directly coupled with the length, orientation and aspect ratio of the nanorod arrays. The optical transmittance of the NR arrays indicated a regular decrement of average transmi...
[ 3 ] - Increasing the hydrogen storage capacity of single-walled carbon nanotube (SWNT) through facile impregnation by TiO2, ZrO2 and ZnO nanocatalysts
Various nanocomposites of TiO2, ZnO and ZrO2 decorated single wall Carbon nanotubes (SWNTs) were fabricated by facile and template free continuous ultrasonication/stirring of virgin metal oxide nanopowders and SWNTs in ethanol under UV-light illumination. The TEM micrographs showed that nanoparticles (NPs) were uniformly dispersed and bonded on the surface of SWNTs. The results of XRD as well a...
[ 4 ] - Influence of Cr dopant on the microstructure and optical properties of ZnO nanorods
One-dimensional (1D) undoped and Cr doped ZnO nanorods with average length of 1 µm and diameter of 80 nm were synthesized using hydrothermal method where a fast growth of ZnO nanorods on the seed layer was observed. Afterwards, the effects of Cr dopant on structural, surface morphology and optical properties of nanorods were studied using X-ray diffraction (XRD), scanning electron microscopy (S...
[ 5 ] - اثر غلظت متان و دما درتعداد لایه های گرافین فوم سنتز شده به روش CVD
در این پژوهش گرافین فوم(GF) کملایه به روش رسوبدهی بخار شیمیایی(CVD) سنتز شد و اثر غلظت متان و دمای سنتز مورد مطالعه قرار گرفت. با تغییر غلظت گاز عامل(متان) با مقادیر 0.5، 0.6، 0.7، 1 و 1.5 sccm (standard cubic centimeters per minute) به ترتیب گرافین فوم با تعداد لایههای 2، 4، 6، 11 و25 بدست آمد. همچنین با تغییر دمای سنتز CVD در دماهای 900، 1000 و 1120 درجه سانتیگراد به ترتیب گرافین فوم 23، ...
نویسندگان همکار