Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Synthesis of CuO Nanoparticles and Study on their Catalytic Properties637013469ENE. AyomanDepartment of Chemistry, MalekAshtar University of Technology, Tehran, I. R. IranG. HossiniDepartment of Chemistry, MalekAshtar University of Technology, Tehran, I. R. IranN. HaghighiDepartment of Chemistry Engineering, Islamic Azad University of Sharod, Semnan,
I. R. IranJournal Article20140320<em>In this research, CuO spherical-like nanoparticles were synthesized using the planetary ball mill method. The structure, particle size and morphology of the resulting CuO nanoparticles were characterized by </em><em>XRD (X-ray diffraction)</em><em>, SEM</em><em> (scanning electron microscopy) </em><em>and SAXS (small-angle X-ray scattering) methods. The results of this investigation showed that the smallest particles which were only 82nm in size were achieved by ball milling at dry medium during 20h. These nanoparticles were studied as an additive for promoting the thermal decomposition of ammonium perchlorate (AP). For the first time, CuO nanoparticles were synthesized by planetary ball mill method for the thermal decomposition of AP</em><em>.</em><em> DSC (differential scanning calorimetry) and TGA (thermo gravimetric analysis) techniques were applied to investigate the thermal decomposition of pure AP with and without CuO nanoparticles. Addition of 2%CuO nanopowder</em><em> with 82 nm particle size to AP increased heat decomposition from 880 to </em><em>1719.87</em><em>J/g. Also, addition of 2%CuO nanopowder</em><em> with 82nm particle size to AP decreased the thermal decomposition temperature from 421.99 to </em><em>351.77</em><em>°</em><em>C.</em>https://www.ijnnonline.net/article_13469_03ee1b8cc1e38dd1a9cf270187b26d15.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Model for Thermal Conductivity of Nanofluids Using a General Hybrid GMDH Neural Network Technique718213470ENA. AzariFaculty of Oil, Gas and Petrochemical Engineering, Chemical Engineering Department, Persian Gulf University, Bushehr, I.R. IranS. MarhematiFaculty of Oil, Gas and Petrochemical Engineering, Chemical Engineering Department, Persian Gulf University, Bushehr, I.R. IranJournal Article20141224<em>In this study, a model for estimating the NFs thermal conductivity by using a GMDH-PNN has been investigated. NFs thermal conductivity was modeled as a function of the nanoparticle size, temperature, nanoparticle volume fraction and the thermal conductivity of the base fluid and nanoparticles. For this purpose, the developed network contains 8 layers with 2 inputs in each layer and also training algorithms of least</em><em> squares </em><em>regression. The obtained results of the model have shown good accuracy of hybrid GMDH-PNN for estimating the thermal conductivity of NFs. The RMSE of the model for 24 systems containing 211data sets was achieved 0.0224. </em><em>MAPE </em><em>for training and validation data setswere3.58 and 3.2%, respectively</em><em>. Also, the proposed hybrid GMDH-PNN model was compared with different models from the literature. The results showed that the developed model can successively correlate and predict the thermal conductivity of different groups of NFs. Moreover, a remarkable agreement for the model with the experimental data was achieved with respect to the other models from the literature.</em>https://www.ijnnonline.net/article_13470_8ed3229a8920e8c46168f4c5ed758bb0.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Effective Parameters in Contact Mechanic for Micro/nano Particle Manipulation Based on Atomic Force Microscopy839213471ENM. H. KorayemRobotic Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, I. R. IranH. KhaksarPhD student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, I. R. IranM. TaheriPhD student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, I. R. IranJournal Article20141015<em>The effect of geometry and material of the Micro/Nano particle on contact mechanic for manipulation was studied in this work based on atomic force microscopy. Hertz contact model simulation for EpH biological micro particle with spherical, cylindrical, and circular crowned roller shape was used to investigate the effect of geometry on contact simulation process in manipulation. Then, to validate the simulation results, they were compared to experimental ones. The results can be interpreted from two perspectives, first from the perspective of types of nanoparticles and second from the perspective of types of theories.To investigate the effect of the material of micro/nano particle in contact mechanic simulation process, spherical contact simulations of two EpH and C3T3 cells were compared with each other. EpH cells simulations with different geometries showed that the cylindrical shape estimation did not provide accurate response due to longer contact length. However, spherical and circular crowned roller estimations which had 19.6% and 15.6% difference from experimental results, respectively, had relatively accurate response. Therefore, selection of circular crowned roller geometry will produce more logical response. Also, the comparison of spherical contact simulation of EpH and C3T3 cells showed that C3T3 cell shows more indention depth under the same applied force</em><em>.</em>https://www.ijnnonline.net/article_13471_e2998e257305045b1ad22fdc922f89e6.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601One Pot Chemically Attachment of Amino Groups on Multi walled Carbon Nanotubes Surfaces939913472ENL. MoradiDepartment of Organic Chemistry Faculty of Chemistry, University of Kashan,
Kashan, I. R. IranN. IzadiNano Technology Center, Research Institute of Petroleum Industry, Tehran, I. R. IranF. RostamiDepartment of Organic Chemistry Faculty of Chemistry, University of Kashan,
Kashan, I. R. IranJournal Article20141214<em>Functionalization of multiwalled carbon nanotubes (MWCNTs) with NH<sub>2</sub> groups under a one pot reaction is studied. During the first step of the reaction, Cl and CHCl<sub>2</sub> groups were attached to the surfaces of MWCNTs through an electrophilic addition reaction. In the second step of process, Cl atoms were replaced with NH<sub>2</sub> and amino groups (ethylene diamine and butyl amine) under a nucleophilic substitution reaction. The aminated MWCNTs have high solubility and dispersion stability in organic solvents and polymeric matrixes. FTIR, XRD, TGA and Raman spectroscopy were used for characterization of the achieved products. The analysis results indicate that the MWCNTs functionalized with high concentration of amino groups. Also, treated CNTs show good dispersity and interfacial compatibility when used to make MWCNT/polymer composites. Proposed method is an efficient route to introduce of amino groups onto the surfaces of MWCNTs and the process is a very effective, clean, safe and easy to operate, and the scale up of this method is easy.</em>https://www.ijnnonline.net/article_13472_09c49cab80d7a8d55ac234c5add3ddf5.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Synthesize and Optical properties of ZnO: Eu Microspheres Based Nano-sheets at Direct and Indirect Excitation10111313473ENM. NajafiDepartment of Physics, Shahrood University, Shahrood, I. R. Iran.H. HaratizadehDepartment of Physics, Shahrood University, Shahrood, I. R. Iran.Journal Article20141028<em>Europium (Eu) doped ZnO microsphere based nano-sheets were synthesized through hydrothermal method. Effects of different concentrations of Europium on structural and optical properties of ZnO nano-sheets were investigated in detail. Prepared un-doped and Eu-doped ZnO samples were characterized using X-Ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS) and Photoluminescence (PL) spectroscopy at fluorescence and phosphorescence modes .Results for XRD and EDX showed Eu ions were successfully incorporated into ZnO nanostructures. Fluorescence Spectroscopy indicated that indirect excitation of Eu ions was more effective than direct excitation, which is attributed to an efficient absorption process at UV wavelengths in ZnO host and energy transfer from photon generated electron-hole pair in the ZnO nano-sheets to Eu ions at indirect excitations. Phosphorescence spectroscopy also showed a sharp red luminescence from intra 4f transitions of Eu<sup>3+</sup> ions at excitation wavelengths of 395nm and 464nm which was consistent with XRD and EDX results</em>https://www.ijnnonline.net/article_13473_1f3787a9ac1d29f459d29fa880195b0f.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Effect of Nitric acid on Particle Morphology of the Nano-TiO211512213474ENM. RamazaniDepartment of Physics, Varamin Pishva Branch, Islamis Azad University, Varamin, I. R. IranM. FarahmandjouDepartment of Physics, Varamin Pishva Branch, Islamis Azad University, Varamin, I. R. IranT.P. FiroozabadiDepartment of Physics, Varamin Pishva Branch, Islamis Azad University, Varamin, I. R. IranJournal Article20141219<em>Nano-sized titanium dioxide TiO<sub>2</sub> powder was prepared by new wet chemical route from its precursor Titanium (IV) chloride (TiCl<sub>4</sub>) as precursor with isopropoxy alcohol in presence of nitric acid under ambient condition. </em><em>Their morphologies, phase compositions and components of the TiO<sub>2</sub> nanoparticles</em><em> were characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), electron dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectrophotometer. The TEM results showed the as-synthesized TiO<sub>2</sub> formed in nanometer scale. The FE-SEM images showed that the size of TiO<sub>2</sub> nanoparicles decreased with increasing annealing temperature while the uniformity of size distribution decreased. The FE-SEM images also revealed that the size of annealed TiO<sub>2</sub> nanocrystals increased with increasing the value of nitric acid. The average grain size of anatase nanoparticles was obtained about 25nm. The crystal structure of the nanoparticles before and after annealing was analyzed by XRD analysis. When the calcinations increased above 550<sup>o</sup>C, the phase transformation of anatase to rutile occurred, but the anatase phase was still dominant. The sharp peaks in FTIR spectrum determined the purity of TiO<sub>2</sub> nanoparticles and absorbance peak of UV-Vis spectrum showed anatase phase at wavelength about 380 nm with band gap of 3.26 ev for as-prepared TiO<sub>2 </sub>and rutile phase at wavelength about 382 nm with band gap of 3.24 ev for annealed TiO<sub>2</sub> nanoparticles. The EDS spectrum showed peaks of titanium and oxygen. </em>https://www.ijnnonline.net/article_13474_7416ef6eb0c2166bf647eb341beb1066.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Imidazolium-based Ionic liquids on Morphology and Optical Properties of ZnO Nanostructures12313113475ENA. S. ShahvelayatiDepartment of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, I. R. Iran.M. SabbaghanChemistry Department, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran, I. R. Iran.S. E. BashtaniDepartment of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, I. R. Iran.Journal Article20141016<em>ZnO nanostructures have been synthesized by a simple reflux method, using different ionic liquids, such as 1-benzyl-3-methylimidazolium bromide ([BzMIM][Br]), 1,1'-(1,4 phenylenebis (methylene)) bis (3-methyl-1H-imidazol-3-ium) bromide ([MM-1,4-DBzIM<sub>2</sub>][Br]<sub>2</sub>) and 1-phenacyl-3-methylimidazolium bromide ([PMIM][Br]), with different amount of sodium hydroxide in water. Also the effect of reaction time on morphology of ZnO nanostructure using 1-octhyl-3-methylimidazolium bromide, [OMIM][Br] is reported. The structure, morphology and optical properties of samples were characterized by means of XRD, SEM and UV-visible absorption. The results show that benzoyl group at position-1 of imidazole ring causes nanosheet ZnO morphology. The time dependent experiments displayed that ZnO nanoparticle arrays and nanosheet ZnO were created. The width and diameter of the resulting ZnO nanosheets can be readily controlled. A possible formation mechanism based on evidence has been discussed. The band gaps are estimated to be 2.57-2.89 eV according to the results of the optical measurements of the ZnO nanostructures. This study shows that ionic liquid may be effect on band gap energy.</em>https://www.ijnnonline.net/article_13475_0a1d7a2af504edbcf26288dba061e42e.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700411220150601Synthesis of Silica Coated Magnetic Nanoparticles13313713476ENE. GhasemiInstitute for color Science and technology, Tehran, I. R. IranM. GhahariInstitute for color Science and technology, Tehran, I. R. IranJournal Article20130927<em>In this research controlled coating of magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles with SiO<sub>2</sub> was investigated. The Fe<sub>3</sub>O<sub>4</sub> nanoparticles were synthesized via chemical co-precipitation and then coated by silica according to Stober method. Effects of tetra ethyl ortho silicate (TEOS) concentration and ethanol to TEOS on the coating thickness were investigated. X-ray powder diffraction, </em><em>Fourier transform infrared spectroscopy</em><em>, transmission electron microscopy and alternative gradient force magnetometry techniques were used to characterize the magnetic nanoparticles and their coating. The results showed that the Fe<sub>3</sub>O<sub>4</sub> particles are in the 6-20 nm size range. Particles coating thickness increased when the TEOS concentration increased. Magnetic results revealed that the coating can prevent magnetite nanoparticles from surface oxidation and enhancement of saturation magnetization. For magnetic particles with mean diameter of 15nm coating diameter was about 7nm and the saturation magnetization of such particles was about 30emu/g.</em>https://www.ijnnonline.net/article_13476_853ec1bf2a89dd212301572a5b679d98.pdf