University of KashanJournal of Nanostructures2251-78719220190401Simultaneous electrochemical determination of Acetaminophen and Codeine based on a MWCNT/MCM48 nanocomposite modified glassy carbon1902018876610.22052/JNS.2019.02.001ENAliBabaeiDepartment of Chemistry, Faculty of Science, Arak University, Arak, IranInstitute of Nanosciences and Nanotechnology, Arak University, Arak, IranSaraSoleimani BabadiDepartment of Chemistry, Faculty of Science, Arak University, Arak, IranMasoudSohrabiDepartment of Chemistry, Faculty of Science, Arak University, Arak, IranJournal Article20161125A novel chemically modified electrode was constructed based on multi-walled carbon nanotubes, MCM48 molecular sieve composite modified glassy carbon electrode .The modified electrode showed that it can be used for simultaneous determination of acetaminophen (ACT) and codeine (COD), simultaneously. The measurements were carried out by the application of differential pulse voltammetry (DPV), cyclic voltammetry (CV) and chronoamperometry (CA) methods. The fabricated sensor revealed some advantages such as excellent selectivity, good stability and high sensitivity toward ACT and COD determination. Application of DPV method under the optimum conditions showed the modified electrode provides linear responses versus ACT concentrations in the range of 0.2-40 µM and 80-350 µM. The results for COD showed the linear responses in the ranges of 4-70 µM and 150-400 µM respectively using DPV method. The modified electrode was used for determination of ACT and COD in real samples like human blood serum and plasma with satisfactory results.https://jns.kashanu.ac.ir/article_88766_2899cb90a415db47b280f272fc303623.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Structural, Electrical, and impedance spectroscopy studies of Barium substituted nano calcium ferrites synthesized by solution combustion method.2022108876710.22052/JNS.2019.02.002ENPuttarajuShankarDepartment of Physics, Sai Vidya Institute of Technology, Bengaluru, IndiaVisveswaraya Technological University, Belagavi, IndiaBhavyashriShettyDepartment of Physics, Don Bosco Institute of Technology, Bangalore, IndiaAntonyLazor JayasheelanDepartment of Physics, Maharani’s Science College for Women Bengaluru, IndiaNanjaReddy Sivasankara ReddyDepartment of Physics, Presidency University , Bangalore, IndiaChalla SeshuPrakashDepartment of Physics, SJC Institute of Technology, Chikkaballapura, IndiaJournal Article20180611Barium substituted nanocrystalline ferrites with chemical composition BaxCa1-xFe2O4 (x =0.0 to 0.25) BCAF were prepared by solution combustion method. The phase formation of mixed spinal structured ferrites was confirmed by PXRD analysis. The average crystallite size was calculated using Debye-Scherrer formula and it was found to be in the range of 27-44 nm. Surface morphology was analyzed by SEM, it reveals the highly porous nature of the synthesized samples. Nanocrystalline nature of samples was confirmed by TEM. The real and imaginary part of dielectric constant (ε′ & ε′′), dielectric loss factor (tan δ) and AC conductivity (σac) of the samples were measured using LCR meter in the frequency range of 100 Hz–5 MHz at room temperature. The dielectric constant of the synthesized ferrite samples was found to decrease with increase in frequency and finally reaches a constant value at higher frequencies which is typical behavior of dielectric ferrites. The observed dielectric dispersion is of Maxwell-Wagner type interfacial polarization. The contribution of grain boundary resistance has been studied from the cole-cole plots. The impedance spectroscopy analysis confirms the non-Debye type of conductivity relaxation for the nanocomposite. The high value of the dielectric constant makes the material suitable for miniature memory devices based capacitive components or energy storage devices. The samples also show low dielectric losses at high-frequency region which make them suitable for high-frequency applications and also long relaxation time of BCAF nanocomposites could make them suitable for nano scale spintronic devices.https://jns.kashanu.ac.ir/article_88767_f10bf1380f400a10246ddc39c092ea28.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Combine flake like magnesium hydroxide and cubic like aluminum hydroxide nanostructures in order to improve fire retardant of PVC and PMMA2112188876810.22052/JNS.2019.02.003ENAhmadGholizadehDepartment of Chemistry, Arak branch, Islamic Azad University, Arak, IranSaeidJamehbozorgiDepartment of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, IranMohammadYousefiDepartment of Chemistry, Yadegar-e- Imam Khomeini(RAH), Shahr-e-Rey Branch, Islamic Azad University, Tehran, IranAliNiaziDepartment of Chemistry, Arak Branch, Islamic Azad University, Arak, IranJournal Article20170619In this study, Flake-like magnesium hydroxide (Mg(OH)2) and cubic-like aluminum hydroxide (Al(OH)3) nanostructures were synthesized via a simple co-precipitation method at relatively low temperature. Chemical properties and surface morphology of the magnesium hydroxide and aluminum hydroxide were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy image (SEM), transmission electron microscopy image (TEM), differential scanning calorimetery analysis (DSC) and thermo gravimetric analysis (TGA). Magnesium hydroxide and cubic-like aluminum hydroxide were then added to PVC, Graphite and PMMA polymers. The effect of cooperation between magnesium hydroxide and cubic-like aluminum hydroxide nanostructures on the fire retardant of the polymeric matrixes has been investigated. The results show that the thermal decomposition of the nanocomposites shifts towards higher temperature in the presence of the magnesium hydroxide and cubic-like aluminum hydroxide. As well as, the enhancement of fire retardant of nanocomposites is due to endothermically decomposition of these nanostructures and releases of water and dilutes combustible gases.https://jns.kashanu.ac.ir/article_88768_200fb099dc6e3d9cafd6f35b0466fe69.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Kaolin-SO3H nanoparticles: A new efficient and reusable catalyst for synthesis of 2-substituted benzimidazoles at room temperature2192297668810.22052/JNS.2019.02.004ENAbdolhamidBamoniriDepartment of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, IranBi Bi FatemehMirjaliliDepartment of Chemistry, College of Science, Yazd University, Yazd, IranNahidYaghmaeiyan-MahabadiDepartment of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, IranJournal Article20170628Kaolinite clay found its application in medicine, in toothpaste, in cosmetic and as a food additive. Recently, a specially formulated spray is used in fruit and vegetable production to repel the insects and prevent sunburn. Kaolin-SO3H nanoparticles were prepared via reaction of kaolin and chlorosulfonic acid and characterized by FT-IR, XRD, FESEM, TEM, XRF, EDS, BET and TGA. 2-Substituted benzimidazoles have been used as selective neuro-peptides YY, receptor antagonists, antitumor, antivirus, antimicrobial, antioxidant, antiparasitic, antihelmintics, antiproliferative, anti-HIV, anticonvulsant, anti-inflammatory, antihypertensive, antineoplastic, analgesicand antitrichinellosis, topoisomerase IV inhibitors, potent inhibitors of TiE-2 and VEGFER-2 tyrosine kinase receptor, and 5-HT3 antagonists. 2-Substituted benzimidazoles are prepared via condensation of o-phenylenediamines and aldehydes. In this article, we have used Kaolin-SO3H nanoparticles for the synthesis of 2-substituted benzimidazoles under mild reaction conditions. The structure of products were identified by FT-IR, 1H-NMR and 13C-NMR. This method has the advantages of high yields, short reaction times and easy work-up.https://jns.kashanu.ac.ir/article_76688_eb6e4e7d1a873ce1df52f867e2b6e9ff.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401The effect of sputtering RF power on structural, optical and electrical properties of CuO and CuO2 thin films2302378876910.22052/JNS.2019.02.005ENAlirezaRazeghizadehDepartment of Physics, Faculty of Science, Payame Noor University, Tehran, IranMaryamMahmudi GhalavandiDepartment of Physics, Faculty of Science, Payame Noor University, Tehran, IranFarhangSohiliDepartment of Physics, Faculty of Science, Kharazmi University, Tehran, IranVahdatRafeeDepartment of Physics, Faculty of Science, Payame Noor University, Tehran, IranJournal Article20170822In this paper, the RF power change effect on the structural, optical and electrical properties of CuO thin films prepared by RF reactive magnetron sputtering deposited on glass substrates are studied. At first, the thin films are prepared at 150, 280, 310 and 340W respectively. Then, the films are characterized by XRD, AFM, Uv-visible and four-point probe analysis respectively. The results show that the crystallite size and lattice constant of samples increased from about 20 nm to 59 nm and 4.15 to 4.51 respectively with an increase in RF power from 150 to 340W. The AFM and four-point analysis results show that the samples deposited at 150 and 340W have smooth surfaces and more surface electrical resistance than the samples deposited at 280 and 310W because the dominant phase of samples prepared at 150 and 340W are CuO2 and 280 and 310 are CuO respectively. Also, the results indicate the energy band gap increased from about 2.25 to 2.52eV with an increase in RF power from 150 to 340W and the extinction coefficient of samples prepared at 150W is more than samples prepared at 340W in all of the wavelength.https://jns.kashanu.ac.ir/article_88769_90b5ae1d6d81332c55bf5c4fd40fb160.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Thiol modified Au nanoparticles grafted manganese doped magnetic iron oxide nanoparticles for spectrometric determination of short-term release of mercury and copper from dental amalgam in saliva2382488880610.22052/JNS.2019.02.006ENMitraAmoli DivaDepartment of Chemistry, Payame Noor University (PNU), Tehran, IranKamyarPourghaziDepartment of Research and Development, Darupakhsh Pharmaceutical Co., Tehran, IranMajidAmoli DivaFaculty of Dentistry, Babol University of Medical Sciences, Babol, IranJournal Article20170828Abstract<br /> A new adsorbent, ethylene glycol bisthioglycolate modified gold nanoparticles grafted Mn doped Fe3O4 nanoparticles (EGBTG-Au@Mn-Fe3O4 NPs) were synthesized through chemical precipitation followed by an oxidative Mn doping process to use for extraction and preconcentration of trace amounts of Hg, and Cu ions in artificial and natural saliva. The prepared adsorbent was characterized by TEM, BET, XRD and VSM techniques. Fusayama artificial saliva was prepared and used as blank sample and natural saliva was collected from nine volunteers ranged from 15-29 years old who exposed to posterior decayed teeth amalgam filling and short-term release of heavy metal ions was assessed in 24, 72 and 96 h after filling. Various factors affecting extraction/desorption efficiency of target ions have been investigated and analytical characteristics of the recommended method were determined. Detection limits of 0.12 and 0.09 ng mL-1 were obtained for Cu and Hg ions respectively with preconcentration factor of 96. The results revealed that the adsorbent has high adsorbent capacity and good reusability for extraction/preconcentration of target ions in relatively high saline solution like biological fluids.https://jns.kashanu.ac.ir/article_88806_5870542417b97494773197280149d6df.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401A green approach to the facile synthesis of colloidal platinum nanoparticles by Preyssler polyoxometalate2492578880710.22052/JNS.2019.02.007ENMohamad RezaAfifehDepartment of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, IranAliAhmadpourDepartment of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, IranMohammad TaghiHamed MosavianDepartment of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.AliAyatiDepartment of Chemical Engineering, Quchan University of Technology, Quchan, IranFatemehF. BamoharramDepartment of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, IranFatemehAhmadi HekmatikarDepartment of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.Journal Article20170925In the present study, platinum nanoparticles were synthesized through an effective, facile and green method using H14[NaP5W30O110], a Preyssler-structured polyoxometalate, under UV light irradiation. Preyssler plays the roles of photocatalyst, reducing agent and stabilizer in the synthesis of Pt nanoparticles. The effect of different parameters, i.e. time, propan-2-ol volume, pH, molar ratio of Preyssler to Pt ions ([Preyssler]/[Pt4+]) and temperature on the size of prepared nanoparticles were investigated. Under different conditions, platinum nanoparticles with minimum size of 13 nm were ultimately obtained. The nanoparticles were characterized by UV/Vis spectroscopy, particle size distribution, transmission electron microscopy and electron diffraction techniques. The results showed that the photocatalytic behavior of Preyssler was a propulsion factor in reducing the Pt4+ ions. The resultant NPs are covered with a Preyssler layer which contributes to the stabilization of NPs. It was shown that the subsequent increasing of NP size can be on account of partly increasing rate of NP growth compared to nucleation. Moreover, the stability of obtained nanoparticles was inspected.https://jns.kashanu.ac.ir/article_88807_5ddd0ccf877396b79b8932b877ced306.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Photocatalytic degradation of rhodamine B, and phenol red dyes using NiMn2O4 nanoparticles prepared by a new approach2582678880810.22052/JNS.2019.02.008ENFaridehSedighiInstitute of Nano Science and Nano Technology, University of Kashan, Kashan, IranAliSobhani-NasabSocial Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, IranCore Research Lab, Kashan University of Medical Sciences, Kashan, IranMohsenBehpourInstitute of Nano Science and Nano Technology, University of Kashan, Kashan, IranMehdiRahimi-NasrabadiNanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IranFaculty of Pharmacy, Baqiyatallah University of Medical Sciences, Tehran, IranJournal Article20171014NiMn2O4 nanoparticles have been successfully prepared through sol-gel method. The effects of different factors such as the type of solvent, and amino acid temperature were investigated on the size and morphologies of products. The smallest particle size of NiMn2O4 nanoparticles was found to be 25 nm in diameter. The magnetic properties of the samples were also measured by an alternating gradient force magnetometer (AGFM). The optical property of the desired products was investigated by UV–vis diffuse reflectance spectroscopy , and the band gap of product was computed nearly 3 eV. The estimated band gap confirms that this product may be used as a photocatalyst, so the photocatalytic test was conducted by photooxidation of dyes under ultraviolet irradiation and in the presence of NiMn2O4 nanoparricles. The results demonstrated that rhodamine B degradation was about 98 % under ultraviolet light for 80 min. Therefore, the synthesized product can be employed as an effective photocatalyst.https://jns.kashanu.ac.ir/article_88808_6d23d359d37074221ffae61c0750297d.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Core–shell titanium dioxide /carbon nanofibers decorated nickel nanoparticles as supports for electrocatalytic oxidation of ethanol2682756323210.22052/JNS.2019.02.009ENMozhganYavariDepartment of Chemistry, Faculty of Science, Yazd University, Yazd, IranMohammadMazloum-ArdakaniDepartment of Chemistry, Faculty of Science, Yazd University, Yazd, IranAlirezaKhoshrooDepartment of Chemistry, Faculty of Science, Yazd University, Yazd, IranJournal Article20171017Abstract<br /> Recently alcohol fuel cells has been increased consideration because of their environmental friendliness, high energy conversion efficiency and low emissions. Many effort have been made to improve the electro-oxidation performance of alcohols such as methanol, ethanol and propanol. In this work, a new method for ethanol oxidation based on core–shell titanium dioxide / carbon nanofibers (TiO2@C NFs), TiO2 as a core and carbon as a shell, decorated Ni nanoparticles (NiNPs) is presented. TiO2@C NFs were prepared by mixing the electrospinning technique and hydrothermal method. Nickel nanoparticles were electrodeposed on the surface of TiO2@C NFs denoted as TiO2@C- Ni. The catalyst was characterized by SEM and electrochemical methods. Performance of ethanol oxidation was investigated in aqueous NaOH solutions by chronoamperometry and cyclic voltammetry. The electrochemical measurements showed that this electrode is effective and has good electrocatalytic activity for ethanol oxidation and the structures of nanofibers have important effect on the electrooxidation of ethanol. The synergy between Ni, carbon shell and TiO2 support, boost ethanol oxidation on TiO2@C- Ni.<br /> Keywords: Ethanol electrooxidation; Electrospinning; Nickel nanoparticles; Core–shell titanium dioxide /carbon nanofibershttps://jns.kashanu.ac.ir/article_63232_eed62b0fbdb906ca5ba576df67741db9.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Tantalum/ Nitrogen and n-type WO3 semiconductor/FTO structures as a cathode for the future of nano devices2762868880910.22052/JNS.2019.02.010ENSiamkHoseinzadehYoung Researchers and Elite Club, West Tehran Branch, Islamic Azad University, Tehran, IranAmir HoshangRamezaniDepartment of Physics, West Tehran Branch, Islamic Azad University, Tehran, IranJournal Article20180106In the last decades an important number of research papers published on nano chip electrode and cathode electrochromic materials. Tantalum (Ta) with so high melting point can be as a good candidate for the future of nano chip devices. However, its surface has not enough trap centers and/or occupation states, so nitrogen ions exposed on Ta surafce, may solve this problem. For this purpose, in the present work, samples of tantalum with purities of 99.99% (0.58 mm thickness) were implanted by nitrogen ions. The ions’ implantation process was performed at 30 keV and also at different doses which were in the range between 1017- 1018 ions/cm2. The electrical, nano structural characteristics, sample surface topography characteristic were investigated on Tantalum nitrides (Ta/N) structures by looking at current–voltage (I–V) curves.In addition to Ta/N, WO3powders as a famous EC metal oxide, a silver metal deposited on fluorine doped tin oxide (FTO)-coated glass andmultilayer structure with using the physical vapor deposition (PVD) apparatus are formed. Some techniques such as uv- visible, Atomic Force Microscopy (AFM) and X Ray Diffraction (XRD) have been used. The obtained results show the formation of hexagonal tantalum nitride (TaN0.43), and more trap centers of sample surface (in comparison to current cathode material of EC device). The electrical resistivity of the tantalum after nitrogen implantation is also found to increase with ion doses.Therefore, Ta/N with more trap centers (rough surface) can be suggested as a good element of the future of EC and nano devices.https://jns.kashanu.ac.ir/article_88809_eeccd200502107ec7bccb7377f3f74ce.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Experimental study of methylene blue adsorption from aqueous solutions onto Fe3O4/NiO nano mixed oxides prepared by ultrasonic assisted co-precipitation2873008881010.22052/JNS.2019.02.011ENGheffarKheraldeen KaraDepartment of Chemistry, Iran University of Science and Technology, Tehran, IranMahboubehRabbaniDepartment of Chemistry, Iran University of Science and Technology, Tehran, IranJournal Article20180212According to the increasing development of the mankind, social and technology activities in the earth, various industry is in a state of uncontrolled growth. In the present study, magnetite/nickel oxide mixed metal oxide nanoparticles (FNMMO NPs) were prepared by a simple method assisted by ultrasonic waves and applied as a novel adsorbent to dispose of dye wastewater. The morphology and chemical structures of the Fe3O4, NiO and FNMMO NPs were characterization by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray spectroscopy (EDX), scanning electronic microscope (SEM) and transmission electron microscope (TEM). The adsorption of methylene blue (MB) onto FNMMO NPs was studied in relation to initial concentration of MB, contact time, adsorbent dose and pH value of solution. The equilibrium adsorption isotherm was fitted by Langmuir isotherm. The capacity of adsorption was evaluated 40.1 mg.g-1 and the time required to reach the adsorption equilibrium was 180 min.https://jns.kashanu.ac.ir/article_88810_f533f58e6a6ad75068870a3b3c4c7882.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Optimization of electrospinning conditions for magnetic poly (acrylonitrile- co- acrylic acid) nanofibers3013158881110.22052/JNS.2019.02.012ENNafisehSabzrooDepartment of Chemical Engineering, Quchan University of Technology, Quchan, IranTaherehRohani BastamiDepartment of Chemical Engineering, Quchan University of Technology, Quchan, IranMajidKarimiDepartment of Polymerization, Faculty of Sciences, Iran Polymer and Petrochemical Institute, Tehran, IranTaherehHeidariDepartment of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, IranJournal Article20180223Magnetic poly (acrylonitrile-co-acrylic acid) (PAN-co-AA) composite nanofibers with different proportions of magnetic nanoparticles (MNPs) were fabricated using electrospinning technique. Electrospinning conditions like polymeric concentration, applied voltage, feeding rate, working distance, and collector type were explored and optimized to produce ultrafine- uniform size and bead free nanofibers. Electrospun nanofibers were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Brunauer−Emmett−Teller (BET) isotherms, X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and vibrating sample magnetometry (VSM). The optimum electrospinning conditions were obtained to be 12wt% concentration, 20 kV voltages, 20 cm tips to collector distance and 0.5 mL/h flow rate. At the optimal operating condition the nanofibers diameter dropped from 359 nm to 74 nm and the specific surface area increased to 12.09 m2g-1 with respect to MNPs content (0 to 40 wt. %). Also, the magnetic property of magnetic nanofibers facilitated the separation<br /> of solid phase much easier than nonmagnetic nanofiber.https://jns.kashanu.ac.ir/article_88811_07646726d890973ed0474d837f648ac3.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Synthesis and Nucleation Mechanism Recognition of BaSO4 Nanoparticle in the Presence of Biopolymers3163258881410.22052/JNS.2019.02.013ENMehrdadManteghianChemical Engineering Faculty, Tarbiat Modares University, Tehran, IranAbdolhamidSameniChemical Engineering Faculty, Tarbiat Modares University, Tehran, IranJournal Article20180325A major portion of BaSO4 is used as drilling fluid additives in the presence of some biopolymers such as starch and PAC (Polyanionic Cellulose) as filtration control and viscosifier. BaSO4 nanoparticle was synthesized in the presence of these applicable polymers with precipitation method by using BaS produced from carbothermal method and Na2SO4. Synthesized nanoparticles size and morphology were analyzed using DLS (Dynamic Light Scattering) and FESEM (Field Emission Scanning Electron Microscope). It can be concluded that, nanoparticles size have inverse proportion with polymer concentration. Also nanoparticles have smaller size in the presence of PAC with longer functional group than starch and prevent chemical reaction due to steric hindrance. If pH increases from 7 to 11, nanoparticles in starch had minimum size in pH=9 and various pH didn’t have noticeable effect on size with PAC. In kinetic study, conductometer is used to detect induction time in different Na2SO4 concentrations and polymers and it is indicated that interfacial tension is decreased as reactant concentration increased and PAC increase induction time and reduce interfacial tension more than starch.https://jns.kashanu.ac.ir/article_88814_47e825bb9e2a4779dac5dd6453a199f2.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Studies on sol-gel dip-coated nanostructured ZnO thin films3263308881510.22052/JNS.2019.02.014ENAnilRamdas BariDepartment of Physics, Arts, Commerce and Science College, Bodwad, 425 310, Maharashtra, IndiaPraptiAnil BariDepartment of Physics, Arts, Commerce and Science College, Bodwad, 425 310, Maharashtra, IndiaRamesh HarishchandraBariNanomaterials Research Lab., Department of Physics, G.D.M. Arts, K.R.N. Commerce and M.D. Science College, Jamner, 424 206, Maharashtra, IndiaJournal Article20180622Nanostructured ZnO thin films were prepared by sol-gel dip coating technique. Zinc acetate and ammonium hydroxide were used as precursors and ethanol was as solvent. Ammonium hydroxide (NH4OH) solution was added drop-wise under vigorous stirring to obtain the sol-gel of different pH (varying from 6.9 to 7.2). ZnO thin films were obtained by dipping the glass substrates for few seconds and then dried in air at room temperature. This process was repeated for different number of coats for the typical sol. Different numbers of coating cycle was employed to obtain the films with varying thicknesses. These films were annealed at 5000C and were characterized by x-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive analysis of x-rays (EDAX). ZnO thin films obtained from sol-gel dip-coating technique were observed to nanostructured. Average particle size was observed to be smaller than 50 nm. The most of the particles were observed to be spherical in shape. ZnO films were observed to be nonstoichiometric (Zinc deficient) in nature. The results were discussed and interpreted.https://jns.kashanu.ac.ir/article_88815_8e343dceccd2c2814be78ce5a6f3b1fe.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Fabricant and characterization of SrWO4 and novel silver-doped SrWO4 using co-precipitation method: their photocatalytic performances for methyl orange degradation3313398881610.22052/JNS.2019.02.015ENFaridehSedighiInstitute of Nano Science and Nano Technology, University of Kashan, Kashan, IranAliSobhani-NasabSocial Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, IranCore Research Lab, Kashan University of Medical Sciences, Kashan, IranMahdiyehEsmaeili-ZareInstitute of Nano Science and Nano Technology, University of Kashan, Kashan, IranMohsenBehpourInstitute of Nano Science and Nano Technology, University of Kashan, Kashan, IranJournal Article20180423A simple co-presipitation method has been developed to synthesize SrWO4 and Ag°-SrWO4 micro/nanostructures with different morphologies, including platelet-, star- and flower-like, in the presence of Na(B(C6H5)) as surfactant. The formation of platelet-, star- and flower-like shapes of particulate system was examined by electron microscopy technique. The products were characterized by X-ray diffraction, scanning electron microscope, UV-vis absorption, energy dispersive X-ray and fourier transform infrared spectra. The scheelite type tetragonal structure of all the synthesized compounds was revealed by powder X-ray diffraction analysis. The influence of surfactant concentration (sodium tetraphenylborate as new surfactant) on the size and morphology of products was investigated. Finally, a good photocatalytic activity was first discovered of the Ag°-SrWO4 microcrystals for the degradation of methyl orange dye after 100 min under UV-vis light. Hence, from the present investigation it was observed that the doping of Ag in SrWO4 will yield a new kind of multifunctional material for fabricating electronic devices.https://jns.kashanu.ac.ir/article_88816_126f550a4090e4c7c0ebba8e40c6be77.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Fabrication and Characterization of Polymer Blend Doped With Metal Carbide Nanoparticles for Humidity Sensors3403488881710.22052/JNS.2019.02.016ENAhmedMohaisenUniversity of Babylon, College of Education for Pure Sciences, Department of Physics, IraqZinahHamadUniversity of Babylon, College of Education for Pure Sciences, Department of Physics, IraqJournal Article20180506Nanocomposites films of (polymer blend-ceramics) were prepared from (PVA-PAA) blend and (PVA-PAA) blend doped with niobium carbide nanoparticles for humidity sensors have low cost, easy fabrication, high sensitivity, lightweight and high corrosion resistance. The structural, electrical and optical properties of (PVA-PAA-NbC) nanocomposites have been studied. The D.C electrical properties of (PVA-PAA-NbC) nanocomposites were studied with different temperature range. The results showed that the D.C electrical conductivity (PVA-PAA) blend increases with increase in niobium carbide nanoparticles concentrations and temperatures. The activation energy of (PVA-PAA) blend decreases with increase in niobium carbide nanoparticles concentrations. The results of optical properties showed that the transmittance of (PVA-PAA) blend decreases with increase in niobium carbide nanoparticles concentrations. The (PVA-PAA-NbC) nanocomposites tested for humidity sensors and the results showed that the (PVA-PAA-NbC) nanocomposites have high sensitivity for humidity sensors.<br /> Keywords: niobium carbide, nanocomposites, humidity sensors, activation energy.https://jns.kashanu.ac.ir/article_88817_14b675cc9d22ca70bf5aafd5e20c6db4.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Synthesis and characterization of TBA-PV2Mo10@PVA as an efficient and reusable heterogeneous catalyst for oxidative desulfurization of gasoline3493648881810.22052/JNS.2019.02.017ENMohammad AliRezvaniDepartment of Chemistry, Faculty of Science, University of Zanjan, Zanjan, IranMaryamShaterianDepartment of Chemistry, Faculty of Science, University of Zanjan, Zanjan, IranNasrinKhalafiDepartment of Chemistry, Faculty of Science, University of Zanjan, Zanjan, IranJournal Article20180511To prepare ultra-clean gasoline fuel, a new nanocomposite TBA-PV2Mo10@PVA was introduced as an efficient and green catalyst for oxidative desulfurization (ODS) process. The nanocomposite was successfully prepared by reaction of tetrabutylammonium bromide (TBA), H5PMo10V2O40, and poly vinyl alcohol (PVA) at room temperature via sol–gel method under oil-bath condition. The synthesized TBA-PV2Mo10@PVA was characterized by FT-IR, XRD, UV-vis, SEM and 31P NMR spectroscopy. The catalytic activity of catalyst was tested on the ODS of gasoline in the presence of CH3COOH/H2O2 (1/1 volume ratio) as oxidant system and results were compared with model sulfur compounds (MSCs). After 2 h, the results were shown that the removal of total sulfur content could be reduced to 97% at the temperature of 35 °C. The main factors affecting the desulfurization efficiency, including catalyst dosage and temperature were investigated in detail. In addition, the kinetic parameters of oxidation of MSCs, reaction mechanism, and reusability of catalyst were discussed. The TBA-PV2Mo10@PVA nanocatalyst was separated and reused conveniently at the end of the reaction for five times. The excellent performance of this catalytic oxidation system can be a promising rout to achieve ultra-clean gasoline.https://jns.kashanu.ac.ir/article_88818_f60e4f86d362d76f250936277dedb4bd.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Magnetic investigation of microwave synthesized and thermal stable poly vinyl alcohol-cobalt ferrite nanocomposites3653758881910.22052/JNS.2019.02.018ENMatinKarbasiNano Physics MS Student, Arak Branch, Islamic Azad University, Arak, Iran.FarnazMaghazeiiMathematics and Physics Department, Science Faculty, Arak Branch, Islamic Azad University, Arak, Iran.DavoodGhanbariDepartment of Science, Arak University of Technology, Arak, IranJournal Article20180516We synthesized CoFe2O4 nanoparticles using heating in various times by simple microwave method at power about 600W. Water, ethylene glycol and their combination were used as solvent. X-ray diffraction pattern(XRD) analysis was performed for evaluation of structural characterization of samples. We also used scanning electron microscopy (SEM) to evaluate the effects of various parameters of heating time and solvent type on mean grain size and nanostructure of the samples. Our results showed that with changing of these parameters, we can control the nanostructure and grain size of prepared samples. In addition, we produced polymeric nanocomposite of PVA/CoFe2O4 using poly vinyl alcohol films. The thermal stability of it in comparison to PVA polymer was assessed by thermal gravimetric analysis (TGA). Also the nanostructures of polymer nanocomposite were analyzed by SEM. To evaluate the magnetic parameters of samples, vibrating sample magnetometer (VSM) analysis were done. Also the spectrum of synthesized nanoparticles and polymer nanocomposite were drawn by FT-IR. Our results confirmed that the nanostructures, magnetic behavior and thermal stability of the prepared nanocomposite are acceptable for needed applications.<br /> Key Words: Cobalt ferrite nanoparticles, Magnetic behavior, Nanostructure, Polymer nanocomposite, Thermal stabilityhttps://jns.kashanu.ac.ir/article_88819_7549f90d0f9735c01bdca6e253622109.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Ta-AgNps are potential antimicrobial resistance breakers3763838882010.22052/JNS.2019.02.019ENTahiraAktherSchool of Life Sciences B. S. Abdur Rahman Crescent Institution of Science and Technology, Vandalur, Chennai (TN), IndiaSPriyaSchool of Life Sciences B. S. Abdur Rahman Crescent Institution of Science and Technology, Vandalur, Chennai (TN), IndiaSaroj KumarSahSchool of Life Sciences B. S. Abdur Rahman Crescent Institution of Science and Technology, Vandalur, Chennai (TN), IndiaMohd ShahanbajKhanSchool of Life Sciences B. S. Abdur Rahman Crescent Institution of Science and Technology, Vandalur, Chennai (TN), IndiaSHemalathaSchool of Life Sciences B. S. Abdur Rahman Crescent Institution of Science and Technology, Vandalur, Chennai (TN), IndiaJournal Article20180716An easy and rapid microwave-assisted green synthesis of silver nanoparticles (AgNPs) was carried out using aqueous bark extract of arjuna and their antibacterial and anti-biofilm potential was investigated. The AgNPs were characterized by various techniques .The FTIR data revealed the presence of plant organic constituents and metabolites bound to TA-AgNPs, which contributes for their stability. To elucidate the antibacterial efficacy and biofilm inhibition of Ta-AgNps against multidrug-resistant. Pathogenic E.coli harbouring the ESBLs. Treatment of TA-AgNps inhibited the growth of human pathogenic (both gram positive and gram negative) bacterial strains including Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), Salmonella typhimurium (ATCC 14028), Proteus mirabilis (ATCC 35659), Acinetobacter baumannii (ATCC 19606) and Methicillin-Resistant Staphylococcus Aureus (MRSA). Further, the clinical isolates of E.coli that are resistant and susceptible to antibiotics are utilized to test the efficacy of TA-AgNps. In E.coli, ESBLS are responsible for antibiotic resistance. Moreover, docking study with T.arjuna phytochemical constituents confirmed that the phytochemical constituents present in TA-AgNPs interacted well with CTXM-15 and highest interaction was observed with tannic acid. Hence the expression of gene encoding CTXM-15 was screened in clinical isolates. Interestingly, the expression of CTXM-15 was not observed in samples treated with TA-AgNps. The results suggested that AgNPs of Terminalia arjuna bark extract can be used to control multidrug-resistant E.coli to prevent the antibiotic resistance. To the best of our knowledge, this is the first attempted study to show the effectiveness of Ta-AgNps against multidrug-resistant E.coli harbouring CTXM-15.https://jns.kashanu.ac.ir/article_88820_8161c7354d5b7c860f4454a52150b498.pdfUniversity of KashanJournal of Nanostructures2251-78719220190401Electrochemical determination of gallic acid in Camellia sinensis, Viola odorata, Commiphora mukul, and Vitex agnus-castus by MWCNTs-COOH modified CPE3843958882110.22052/JNS.2019.02.020ENSheidaSarafrazDepartment of Biotechnology, Science and Research branch, Islamic Azad University, Tehran, IranHossain-AliRafiee-PourDepartment of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, IranMaryamKhayatkashaniSchool of Traditional Medicine, Tehran University of Medical Sciences, Tehran, IranAsaEbrahimiDepartment of Biotechnology, Science and Research branch, Islamic Azad University, Tehran, IranJournal Article20180910Gallic acid (GA) is the main phenolic antioxidant which has been subjected of many studies because of its important biological properties including anticancer, anti-inflammatory and antimicrobial activities as well as free radicals scavenger and cardiovascular diseases protector. Hereupon, fabricating a selective and sensitive sensor for GA detection and measurement is an important issue. In this paper a carboxylated MWCNTs modified carbon paste electrode (MWCNTs-COOH/CPE) was successfully fabricated and employed for GA determination.<br /> Activating the carboxylic sites of the MWCNTs carried out in nitric acid solution in ultrasonic bath and further studied by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The electrocatalytic oxidation of GA at the MWCNTs-COOH/CPE surface was studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The GA presented a high electrochemical response on MWCNTs-COOH/CPE at pH 2 in comparison with the CPE. This sensor showed a linear response range of 0.33 - 196 µM and detection limit of 17.2 nM (S/N = 3). Furthermore, the designed MWCNTs-COOH/CPE was successfully applied as a electrochemical sensing system for GA determination in extracts of Camellia sinensis, Viola odorata L, Commiphora mukul, and Vitex agnus-castus respectively with estimated amount of 11.4, 8.9, 11.91 and 2.9 mg L-1 GA in each extract.https://jns.kashanu.ac.ir/article_88821_7cdd3bece821f404d0ae8d17813a220b.pdf