ملکی, شهریار
انرژی اتمی ایران
[ 1 ] - مطالعه اثر توزیع فاز سخت بر رسانندگی الکتریکی کامپوزیت پلیمر- نانولوله کربن به عنوان دزیمتر پرتو با بهره‌گیری از روش مونت‌کارلو
The object of this research is the investigation of carbon nanotube (CNT) distribution effect on electrical conductivity of polymer-CNT composite as dosimetry response of this system. Thus, electrical conductivity of this composite was simulated for aligned, homogenous, and agglomerated distributions in 2D, and 3D situations. The results of simulation were compared and validated by experimental...
[ 2 ] - مطالعۀ خواص الکتریکی یک دزیمتر جدید بر پایۀ نانوکامپوزیت پلیمر-نانولوله کربن
Use of carbon nanotubes (CNTs) in dosimetry is a promising technique for real time in vivo dose measurements with high resolution for nuclear medicine and also dose rate monitoring for radiation protection utilizations. In this research with respect to extraordinary electrical properties of CNTs for several order of magnitudes increasing in electrical conductivity of polymeric matrix, the idea ...
[ 3 ] - مقایسه تجربی پاسخ آشکارسازی و دزیمتری میکرو/ نانو کامپوزیت پلی وینیل الکل- اکسید تنگستن به پرتوهای گاما و نوترون
Recently, polymeric nanocomposites have been used in dosimetry and detection of gamma rays, but due to their low photon absorption cross section, they exhibit a small sensitivity to gamma rays. In order to overcome this problem, metal oxide particles with a high atomic number are added to the polymer matrix. For this purpose, in this work, tungsten oxide particles (WO3) were distributed in poly...
[ 4 ] - Experimental investigation of dosimetry response of nanocomposite of polystyrene-multiwall carbon nanotube in gamma radiation field
Recently, polymeric nanocomposites have been used as real-time detectors and dosimeters of gamma radiation. In this experimental work, multi-wall carbon nanotubes (MWCNT) were dispersed in polystyrene (PS) martix with a weight percentage of 0.05 wt%. SEM images confirmed the appropriate and uniform distribution of carbon nanotubes in the polymer matrix. The dark current and photocurrent of the ...
[ 5 ] - Experimental evaluation of thermal stability of PS- MWCNT nanocomposite as a real-time dosimeter
Introduction: Carbon nanotubes (CNTs) are ideal reinforcing fillers for a polymer matrix, because of their nanometer size, high aspect ratio and, more importantly, their excellent mechanical strength, and electrical and thermal conductivity. The CNTs are categorized into two groups: SWCNT and MWCNT. MWCNTs would have diameters ranging from 2 to 100 nm and lengths of up to tens ...
[ 6 ] - Effect of dispersion state of the magnetic Fe3O4 nanoparticles on the thermal distribution in Hyperthermia
Introduction: Magnetic nanoparticle (MNP) hyperthermia is a promising cancer treatment approach. It is based on the evidence that by injecting MNPs such as Fe3O4 in the tumor and subjecting them to an alternating magnetic field, they release heat, generating temperatures up to 42°C that can kill cancer cells by apoptosis, usually with lowest damage to normal tissue. In previous...
[ 7 ] - Assessment of environmental high-doses using Raman spectroscopy of gamma irradiated MWCNT-OH Nanopowder utilized in radiation accidents
Introduction: The functionalized Multi-Walled Carbon Nanotube with hydroxyl group (MWCNT-OH) due to high aspect ratios (length to diameter), and also excellent mechanical, electrical and thermal characteristics, has great potential applications in flexible electronics, solar cells, antistatic devices, electromagnetic interference shielding, radiation shielding, electrode materi...
[ 8 ] - Linearity response characterization of Polystyrene/ Graphene oxide nanocomposite as real-time dosimeter for therapeutic purposes
Introduction: In recent years, one of the emerging two dimensional (2D) carbon based nano- materials namely Graphene Oxide has been incorporated into polymeric matrices to enhance the electrical properties of the composites. The electrical conductivity of Graphene Oxide is excellently used in fabricating polymer-based sensors, energy-related systems, biotechnology, anti-statics...
[ 9 ] - A Monte Carlo Study on the Shielding Properties of a Novel Polyvinyl Alcohol (PVA)/WO3 Composite, Against Gamma Rays, Using the MCNPX Code
Background: In recent years, there has been an increased interest toward non-lead radiation shields consisting of small-sized filler particles doped into polymer matrices. In this paper, we study a new polyvinyl alcohol (PVA)/WO3 composite in the presence of high-energy gamma photons through simulation via the Monte Carlo N-Particle (MCNP) simulation code. Materia...
[ 10 ] - Study on Fe3O4 Magnetic Nanoparticles Size Effect on Temperature Distribution of Tumor in Hyperthermia: A Finite Element Method
In recent years, Hyperthermia has been used as an emerging technique for cancer treatment, especially for localized tumors. One of the promising cancer treatment approaches is magnetic nanoparticle (MNPs) Hyperthermia. In this theoretical work, the temperature distribution of a common tumor over the different sizes of Fe3O4 magnetic nanoparticles, namely 25, 50, 100, and 200 nm, was stud...
[ 11 ] - Determination of the electrical percolation threshold of Polystyrene-Graphene Oxide nanocomposite using the experiment and simulation methods
Carbon nanostructures via adding to a polymer matrix, while improving the electrical, mechanical and optical properties of the nanocomposites, are widely used in the industry, medicine, and agriculture. The authors presented several investigations on a new type of gamma dosimeter based on the polymer-carbon nanostructures nanocomposite. In this research, the electrical percolation threshold of ...
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