A5002175989- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- ZnO doping and properties
- Luminescence Properties of Advanced Materials
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Nanocluster Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Gold and Silver Nanoparticles Synthesis and Applications
- Crystal Structures and Properties
- Advanced ceramic materials synthesis
- Ga2O3 and related materials
- Silicon Nanostructures and Photoluminescence
- Carbon and Quantum Dots Applications
- Electronic and Structural Properties of Oxides
- Glass properties and applications
- Microwave Dielectric Ceramics Synthesis
- Advanced Semiconductor Detectors and Materials
- X-ray Diffraction in Crystallography
- Layered Double Hydroxides Synthesis and Applications
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Ferroelectric and Piezoelectric Materials
- Photorefractive and Nonlinear Optics
- Transition Metal Oxide Nanomaterials
Nuclear Science and Technology Research Institute
2015-2024
Iranian Center for Quantum Technologies
2017-2024
Atomic Energy Organization of Iran
2005-2016
Kharazmi University
2013-2014
National University of Malaysia
2008-2013
CdS nanoparticles have been synthesized by a chemical reaction route using ethylenediamine as complexing agent.The were characterized techniques such X-ray powder diffraction (XRD), scanning electron microscope (SEM), UV-VIS absorption spectroscopy, and photoluminescence spectroscopy.The edge for the bulk hexagonal is at 512 nm (2.42 eV).Comparing with CdS, it believed that blue shift in peak was caused quantum confinement effect.Photoluminescence measurements indicate show fluorescence band...
In this study, surface modification of titanium oxide nanocrystals has been considered. PEG was employed to make bio-conjugated TiO2 nanopowders (TNPs). On the basis process, effect on size and morphology prepared samples evaluated. It found that addition stage plays a critical role in characteristics nanopowders. shown affects sol–gel reactions crystallization process nanoparticles. must be added before starting synthesis get well-defined distribution, compared post-synthesis. However,...
In this study, a sol–gel method was used to synthesize Al‐doped ZnO nanocrystals (AZO). For preparation of highly concentrated sol, zinc acetate concentration fixed at 2M. UV‐visible absorption and photoluminescence spectroscopy were evaluate optical properties the prepared samples. High temperature annealing employed solid solubility limit Al ions. XRD Raman are then doping process aluminum in nanopowders. Disappearing second order peak 1160 cm −1 confirm limit. It can be found that...
Introduction: In this study, a simple and facile route was employed to prepare highly transparent luminescent ultra-thin gallium doped ZnO film (GZO). Methods: The thin GZO has been deposited using the simultaneously ultrasonic vibration sol-gel spin-spray coating technique. structural optical properties of pure films were investigated by various methods, such as X-ray diffraction (XRD), photoemission spectroscopy (XPS), scanning electron microscopy (SEM), UV-Vis, PL spectroscopy. Results:...
Carbon quantum dots (C-QDs) with different size distributions and surface characteristics can exhibit good emission properties in the visible near-infrared (NIR) regions, which be applicable optoelectronic devices as well biomedical applications. Optical of colloidal C-QDs distilled water at concentrations produced using a method alkali-assisted surfactant-free oxidation cellulose acetate is presented. The structural optical were investigated, aim clarifying main mechanisms photoluminescence...
The present paper investigates the linear and nonlinear optical properties of CdSe colloidal nanocrystals which have been prepared by an improved sol-gel green technique. UV-visible absorption spectroscopy Z-scan technique were used to identify nanocrystals. maximum peaks for two samples 2.5 nm 3 480 485 nm, respectively. In addition, coefficients (α), (β), refractive index (n2), with their signs magnitudes different sizes quantum dots (QDs) obtained in 15, 25, 50 mW laser intensities using...
Objective(s): This paper describes synthesizing of magnetic nanocomposite with co-precipitation method. Materials and Methods: Magnetic ZnxFe3-xO4 nanoparticles 0-14% zinc doping (x=0, 0.025, 0.05, 0.075, 0.1 0.125) were successfully synthesized by The prepared zinc-doped Fe3O4 characterized X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) UV-Vis spectroscopy. Results: results obtained from...
In this research, highly transparent and conducting hafnium doped zinc oxide (HZO) thin films were prepared by the simple sol-gel dip coating technique. Controlled doping process synthesis method used to improve optical electrical properties of HZO films. The structures, samples characterized XRD, XPS, FESEM, TEM, EDS, UV-Visible, PL spectroscopy. Hall-effect measurement was performed study For first time, film with very low resistivity (4.2 × 10−3 Ω.cm) prepared. At room temperature, strong...