Mohsen Mehrabi

Persian Gulf University | PGU · Department of physics

In This study, n-type single-crystal silicon was used to make porous silicon by electrochemical and photoelectrochemical methods to investigate the hydrogen storage capacity. Carbon dots are made via a hydrothermal method, and palladium nanoparticles are decorated on porous silicon by electroless and drip processes. The morphology of the structures...

Doped Lithium tetraborate nano-powders with copper (sample 1) and co-doped with copper–manganese (sample 2) impurities were synthesized via the combustion process and were used to investigate the optical properties. Scanning electron microscopic images plus X-ray diffraction patterns confirm the morphology, size and crystal structure of the produce...

The MWCNTs are decorated by Pd nanoparticles via various techniques including laser ablation in liquid, chemical reduction, and simultaneously both of them. To study the hydrogen adsorption mechanism, Pd K-edge X-ray absorption spectroscopy (XAS) is carried out via heating/cooling processes under He/H2 exposure. The Fourier transform X-ray absorpti...

Optical absorbers have many applications in the field of optoelectronics, photovoltaics, and energy harvesting because of their capability to absorb electromagnetic waves, as well as their ability to adjust the absorption of specific wavelengths in the mid-IR region. In this study, a perfect optical absorber was designed, which included a gold refl...

The pure and Eu²⁺-doped NaCl crystal were successfully grown by the melt (Czochralski) method. The structural, mechanical and optical properties were characterized by carrying out X-ray diffraction (XRD), micro-hardness, optical absorption, photoluminescence (PL) and thermoluminescence (TL) measurements. The XRD analysis indicates that the Eu²⁺ ion...

Lithium tetraborate nanoparticles co-doped with various percentages of Cu and Mg impurities were synthesized through the combustion process. Scanning electron microscopy images along with X-ray diffraction patterns confirmed the shape and structure of the products. Williamson-Hall equation was used to measure the nanoparticles size that resulted in...

This work’s main purpose is to investigate the effect of Gd ³⁺ substitution on the structural, cation distribution, morphological, and magnetic characteristics of cobalt ferrite nanostructures. The nanostructures were synthesized through the sol-gel auto combustion technique. X-ray diffraction (XRD) analysis with the Rietveld refinement through the...

A series of samarium doped cobalt ferrites with the nominal compositions of CoSmxFe2−xO4 (where x=0, 0.02, 0.04, and 0.06 at.%) was synthesized using sol-gel auto-combustion method. The crystal structure, morphology and magnetic properties of the nanoparticles have been investigated. The XRD data analyzed by the MAUD program confirmed the successfu...

Lithium tetraborate nanoparticles co-doped with various percentages of Cu and Mg impurities were synthesized through the combustion process. Scanning electron microscopy images along with X-Ray diffraction pattern confirmed the shape and structure of the products. The Williamson-Hall equation was used to measure the size of nanoparticles that resul...

Cerium-doped sodium chloride micro and nanoparticles were synthesized without (sample a) and with (sample b) applying 20 kHz ultrasonic waves. Particles size and shape were identified by scanning electron microscopy and X-ray diffraction pattern. Using the Williamson Hall equation, the approximate sizes of ∼462 nm and 45 nm were obtained for sample...

In this work, the optical properties of Rhodamine B (RdB) are investigated in the attendance of various red blood cells (RBCs). RdB fluorophores, as biological markers, is excited using SHG-CW Nd:YAG laser at 532 nm. In fact, the addition of biomolecules of interest to the reference fluorophore notably changes the fluorescence properties of the sus...

The catalytic effect of nickel is addressed to decorate the multi-walled carbon nanotubes for the purpose of hydrogen storage. The hydrogen sorption/desorption are investigated using the volumetric technique. Nickel nanoparticles are distributed on the surface of nanotubes using the laser ablation/chemical reduction treatments. The hydrogen uptake...

Simultaneous laser ablation and chemical reduction processes are introduced here to decorate the multi-wall carbon nanotubes with metal nanoparticles (palladium and nickel) in order to enhance the hydrogen storage capacity. This lucidly elevates the abundance of metal nanoparticles, as well as creating more nano cavities in the carbon nanotubes lea...

Here, Zinc Oxide nanowires are synthesized using thermal chemical vapor deposition of a Zn granulate source and used to enhance a significant Si-solar cell efficiency with simple and low cost method. The nanowires are grown in various O2 flow rates. Those affect the shape, yield, structure and the quality of ZnO nanowires according to scanning elec...

Hydrogen storage properties of multi-walled carbon nanotubes decorated by palladium nanoparticles are investigated using laser ablation and chemical reduction methods, which shows drastic differences from that of laser ablation technique. In the case of laser ablation, the hydrogen uptake is elevated with the palladium content up to a certain value...

The NaCl:Cu and NaCl:Mn nanoparticles (NPs) were produced by co-precipitation and sono-chemistry methods and their thermoluminescence (TL) and photoluminescence (PL) properties were studied. By decreasing the particles size a considerable increase in sensitivity of the samples to high dose gamma radiation was observed. The NPs produced by sono-chem...

CaF2:Tm nanoparticles (NPs) were synthesized by the hydrothermal method. Intense afterglow emission with long lifetime was found for the produced NPs, so its applicability in photodynamic therapy was investigated. Since the wavelength of the afterglow emission of the NPs fairly matches with the absorption band of the PpIX sensitizer, especially in...

In this paper, the magnetic properties of carbon based material, graphene is studied, which is generated by laser ablation in cryogenic media. Transmission electron microscopy (TEM) and alternating gradient force magnetometer (AGFM) are applied to investigate the graphene morphology and magnetic properties, respectively. The graphene synthesized by...

Thermoluminecsence (TL) characteristics of pure CaSO4 nanoparticles produced by co-precipitation method are presented. The formation of the nanoparticles was confirmed by X-ray diffraction (XRD) and scanning electron microscope (SEM). TL glow curve of this phosphor, exposed to gamma radiation exhibits five overlapping glow peaks in the complex glow...

In this work, magnetic properties of new carbon-based material,graphene generated by laser ablationin Cryogenic Media was studied and improvingits magnetic properties byhybridization with silver atoms was carried out.

: CaF2:Dy,Tm nanoparticles have been synthesized by the hydrothermal method. The cubic lattice structure has been confirmed by the X-ray diffraction (XRD) pattern and an average size of 37 nm is obtained using Deby-Schere`s formula. The shape and size of particles are also observed by scanning electron microscopy (SEM). The thermoluminescence (TL)...

In this paper, properties of new carbon-based material, graphene was investigated. Here magnetic properties of graphene generated by laser ablation in Cryogenic Media was studied and compared with that of other reports. Results showed that graphene fabricated by laser method has structure close to low defect graphene lattice. Also graphene powders...

An efficient one-pot three-component condensation of aldehydes, thiols and malononitrile has been developed in the presence of calcium oxide nanoparticles. Highly substituted pyridines as privileged medicinal scaffolds have been efficiently prepared via carbon–carbon and carbon–heteroatom bond formation. This method provides a novel and improved ap...

Lithium tetra borate nanoparticles were synthesized by combustion method. The shape and size of nanoparticles were determined by scanning electron microscopy (SEM). X- ray diffraction pattern (XRD) confirmed the formation of lithium tetra borate nanocrystals. Thermo luminescence (TL) glow curve of the produced nanoparticles following irradiating...

Beryllium oxide (BeO) nanopowder was synthesized using sol-gel method and the effects of changes of chemical reagents were investigated. Because of tissue equivalence and other outstanding thermoluminescence (TL) properties of the bulk material in X and γ dosimetry, the applicability of this nanostructure in TL dosimetry was studied following irrad...

Nanosheet CaSO₄:Mn having an average thickness of 35nm was synthesized by the hydrothermal method and its thermoluminescence (TL) and photoluminescence (PL) characteristics were studied. Three overlapping TL glow peaks were identified in the complex glow curve using the T(stop) technique. Activation energies of 3.76, 2.22 and 2.47eV and kinetic ord...