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Journal of Theoretical and Applied Physics (JTAP)

Editor-in-Chief: Davoud Dorranian, PhD

Online ISSN: 2251-7235

Print ISSN: 2251-7227

Publishes Bimonthly

Volume 18 (2024)

Issue 1, January & February 2024

Original Article
Spatial self-phase modulation in plasmon excited Graphene/WS2 heterostructure

In this work a spatial phase modulation and four-wave mixing in Graphene/ tungsten disulfide (WS2) heterostructure have been demonstrated, which is excited by plasmons of nano-plasmonic donate shape rings. For this purpose, a laser writing system was used to fabricate nanohole arrays and cover them with the plasmonic gold thin film via a sputtering machine […]

Original Article
Photocatalytic properties of silica nanoparticles in water decontamination; adsorption and photocatalytic disinfection

In this experimental research the adsorption and photocatalytic properties of silica nanoparticles were used to disinfection water against the gram-negative Escherichia coli bacteria. Silica nanoparticles were synthesized by modified Stober method and characterized. TEM image shows that the prepared nanoparticles were spherical with 20-30 nanometers diameter and 4.25 eV bandgap energy. The disc diffusion test […]

Original Article
Strong Plasmon–Exciton Coupling in Au Nanoparticle—Conjugated MEH-PPV Polymer

This study investigates the effects of incorporating gold nanoparticles (Au NPs) into a MEH-PPV polymer on its fluorescent properties. Analysis of the fluorescence spectrum of the polymer reveals a significant increase in fluorescence intensity upon the addition of Au NPs. Further investigation using Laser Induced Fluorescence (LIF) spectra demonstrates that the purified polymer emits light […]

Original Article
Structural and corrosion properties of SiC–NiCr nanocomposite coating on Zr substrate in high temperature

The present report describes the deposition of SiC-NiCr films on Zr substrates under an H2 gas environment by plasma focusing (PF). Using the spark plasma sintering (SPS) method, the anode for the plasma focus device was made from SiC, Ni, and Chromium powders. X-ray diffraction (XRD) of SiC-NiCr samples shows a change in the position and […]

Original Article
Influence of varying magnetic field on ion acoustic solitary waves in dissipative plasma

In this paper, we study obliquely propagating of small amplitude ion acoustic waves (IAWs) in non-relativistic cold plasma in which the ions are viscous fluid, electrons distribution is Maxwellian and external magnetic field varies in space. Using the reductive perturbation method, a nonlinear equation which complies with Korteweg–de Vries–Burgers (KdVB) equation is derived for this […]

Original Article
Preparation and evaluation of alginate nanocomposite containing clay and zein to remove tartrazine dye from aqueous solution

The use of clay-based nanocomposites as bioadsorbents was considered in this research due to their high mechanical and chemical stable properties, cheapness, compatibility, and abundance in nature. Thermal solution method was used to produce montmorilonite-alginate-zein (MMTALgZ) nanocomposites to remove tartazine dye. Zein and alginate polymers were used to modify the surface of clay. The samples […]

Original Article
Synthesis and characterization of TiO2- Ag- chitosan nano-composites in order to surface modification and bone tissue engineering using dip coating method

In this research, titanium dioxide (TiO2) nanopowder, TiO2-Ag (TA) and TiO2-Ag-CH (TACH) nanocomposite were produced by the hydrothermal method. After the synthesis of nanoparticles and nanocomposites, the skull titanium mesh implant pieces were immersed in solutions containing nanopowders of TiO2, TA, and TACH and coated using the dip coating method. Structural, chemical, and antibacterial properties […]

Original Article
The effect investigation of various parameters on the growth of silver nanoparticles via atmospheric pressure plasma

In this work atmospheric pressure plasma has been used for the synthesis of silver (Ag) nanoparticles immersed in liquid. we study the effects of various parameters such as the electrolyte, the process time, and the applied electric current on the synthesis of Ag nanoparticles. The products are analyzed by transmission electron microscopy (TEM), X-ray diffraction […]

Original Article
Modeling the generator of electro-pulse discharges

The article discusses some aspects of modeling the dynamics of high-gradient pulse processes accompanying technologies using electrical discharges in a liquid medium. Due to the presence of high pressure, these technologies are successfully used for the destruction and crushing of solid materials, the processing of mineral environments, the intensification of heat exchange processes, etc. The […]

Original Article
Improving the terahertz collection efficiency based on impedance matching in spintronic THz emitters

We study the improvement of terahertz collection efficiency in a THz-TDS system based on a spintronic THz emitter, by exploring the effect of substrate impedance matching. This improvement is obtained by properly coupling a hyper-hemispherical lens fabricated from suitable THz materials to a non-magnetic (NM)|ferromagnetic (FM)|substrate emitter structure. The emitter is a Ni|Pt bilayer film […]

Original Article
Electric and magnetic dipole moments in super cell dielectric meta-surface

Two dimensional all dielectric grating metamaterial based on polydimethylsiloxane and TiO2 materials were prepared via sputtering method in two different configurations as PDMS/TiO2 (50 nm)) and 2D grating (etalon) TiO2 (50 nm)/PDMS/TiO2 (50 nm). As it was measured by a charged coupled device (CCD) camera, the hotspots confirm four points symmetry of the structure and […]

Original Article
Deflection of null and time-like geodesics in topological defects space-time geometry

In this research, we investigate the bending of photon light and/or time-like geodesics within the context of four-dimensional space-time geometry, specifically in the presence of topological defects. These topological defects manifest as cosmic string space-time configurations, encompassing screw dislocation, spiral dislocation, and spacelike dislocation. Our primary objective is to determine the extent of deflection experienced […]

Original Article
Chromium ions effects on Sb2O3-PbO-GeO2 glass properties for radiation protection

In this work we studied the radiation shielding features of Li2O-Sb2O3-PbO-GeO2-Cr2O3 glass systems at different energies ranging from 0.284 to 1.33 MeV. The maximum linear attenuation coefficient (LAC) for the germinate glasses is in the order of 0.680-0.707 cm−1 and this is reported at 0.284 MeV, whereas the minimum LAC is observed at 1.33 MeV […]

Original Article
Surface plasmon polariton dispersion relation with a graded-permittivity plasmonic medium

In this paper, the Surface Plasmon Polariton (SPP) dispersion relation in the TM polarization for the plane interface between a homogeneous dielectric medium (with constant εd) and a gradedpermittivity (i.e. nonhomogeneous) plasmonic medium (with dielectric function εp(z)) is obtained where ‘z’ is normal coordinate to the interface. For small variation of εp(z) it is revealed […]

Original Article
Design and implementation of control system for IPM e-LINAC

The construction of a LINAC facility to provide hands-on experience has been under way at Institute for Research in Fundamental Sciences (IPM). The LINAC, which accelerates an electron beam of 1mA current to 4.5MeV energy, is mostly regarded as a facility for research and development and educational purposes in the field of beam physics and […]