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Masood Hamadanian,Zahra Tavangar,Sara Naseh 한국물리학회 2015 Current Applied Physics Vol.15 No.12
In this article, we reported the structural and conductive properties of benzene derivatives/carboxylated zigzag SWCNTs. It was noticed that the carboxylated carbon nanotubes were appropriate adsorbents for benzene derivatives. We presented novel density of states and band structures for modified SWCNTs by both carboxylic group and benzene derivatives. The result showed that nitrobenzene/COOH-SWCNT comprising superb electronic properties can be effectually applied for electronic devices and solar cells, instead of aniline/SWCNT combined system.
Ashrafi, Ali-Reza,Hamadanian, Masood 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.14 No.1
The non-rigid molecule group theory (NRG) in which the dynamical symmetry operations are defined as physical operations is a new field of chemistry. Smeyers in a series of papers applied this notion to determine the character table of restricted NRG of some molecules. In this work, a simple method is described, by means of which it is possible to calculate character tables for the symmetry group of molecules consisting of a number of NH3 groups attached to a rigid framework. We study the full non-rigid group (f-NRG) of tetraammineplatinum(II) with two separate symmetry groups C2v and C4v. We prove that they are groups of order 216 and 5184 with 27 and 45 conjugacy classes, respectively. Also, we will compute the character tables of these groups.
Group theory for tetraammineplatinum(II) with C_{2v} and C_{4v} point group in the non-rigid system
Ali Reza Ashrafi,Masood Hamadanian 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.14 No.-
The non-rigid molecule group theory (NRG) in which the dynamical symmetry operations are defined as physical operations is a new field of chemistry. Smeyers in a series of papers applied this notion to determine the character table of restricted NRG of some molecules. In this work, a simple method is described, by means of which it is possible to calculate character tables for the symmetry group of molecules consisting of a number of NH3 groups attached to a rigid framework. We study the full non-rigid group (f-NRG) of tetraammineplatinum(II) with two separate symmetry groups C2v and C4v. We prove that they are groups of order 216 and 5184 with 27 and 45 conjugacy classes, respectively. Also, we will compute the character tables of these groups.
Vahid Jabbari,Masood Hamadanian,Sajad Karimzadeh,Dino Villagra´n 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
C–N–S-tridoped TiO2 nanoparticles is synthesized via sol–gel method using cysteine as nonmetalssource. Moreover, to suppress recombination of photogenerated charge carriers, silver nanoclusters aredeposited over C–N–S-tridoped TiO2 via photodeposition technique and the catalyst Ag@C,N,S–TiO2 isdeveloped. The prepared catalysts are characterized by XRD, SEM-EDAX, TEM, XPS, IR, Raman, UV–visDRS, and N2 adsorption–desorption isotherms. Our findings show that Ag@C,N,S–TiO2 catalyst has anexcellent and outstanding photocatalytic performance compared to that of pure TiO2 and commercialTiO2 P25 which the reason is attributed to improved visible-light harvesting, enhanced organic pollutantadsorption and increased photo-efficiency in separation of the charge carriers.
Mahdi Ashrafi,Masood Hamadanian,Saeed Mirsafai,Keivan Torabi 한국섬유공학회 2019 Fibers and polymers Vol.20 No.11
In this study, nitrile-butadiene rubber (NBR) based nanocomposites reinforced with PVC as a polymeric filler andNiFe2O4 as nanofllers with different weight fractions (wt%) were prepared and characterized. The experiments weredeveloped according to response surface methodology (RSM) combined with central composite design (CCD) to optimizethe effects of two variable parameters (PVC and NiFe2O4) on the mechanical properties. The NiFe2O4 nanoparticles (NPs)were synthesized by sol-gel auto-combustion method and, the NBR/PVC/NiFe2O4 nanocomposites were prepared by tworollmill method. The elongation and tensile strength of the optimized nanocomposite were obtained to be 300 % and18 MPa, respectively. The surface SEM images showed that the NiFe2O4 NPs were well distributed in the NBR matrix. Furthermore, cross-sectional SEM images showed that the cracks on the nanocomposite matrix decreased compared to pureNBR. Also, NBR/PVC/NiFe2O4 nanocomposite shows weak ferromagnetic behavior at room temperature than NiFe2O4 NPs. The NiFe2O4 NPs and optimal sample of NBR/PVC/NiFe2O4 nanocomposites were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM), energy dispersive X-ray (EDX), vibrating sample magnetometer (VSM).