Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Exploring and Exploiting Quantum-Dot Cellular Automata 225 232 16977 EN S. A. Ebrahimi Faculty of Computer Engineering, University of Isfahan, Isfahan, I. R. Iran. M. R. Reshadinezhad Faculty of Computer Engineering, University of Isfahan, Isfahan, I. R. Iran. Journal Article 2015 01 25 The Full Adders (FAs) constitute the essential elements of digital systems, in a sense that they affect the circuit parameters of such systems. With respect to the MOSFET restrictions, its replacement by new devices and technologies is inevitable. QCA is one of the accomplishments in nanotechnology nominated as the candidate for MOSFET replacement. In this article 4 new layouts are presented for FA; implemented as two at one layer and the other two at three layers; this is performed in a step by step manner and by providing the details and introducing each one’s problems. The layout process continues till an optimized layout is obtained. The layout and correct assessment of the introduced circuit function is accomplished by using QCA Designer simulation tool. The comparison of the results obtained through simulation confirms that the third design is better than other three designs with respect to cell count and area.

https://www.ijnnonline.net/article_16977_fb81884e2893b11a86facda51150264d.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Catalytic Decomposition of Hydrogen Peroxide in the Presence of Synthesized Iron-Manganese oxide Nanocomposites via Different Methods 233 240 16986 EN S. L. Sharifi Chemistry Department of Imam Hussein University, Tehran, I.R. Iran M. H. Hosseini Chemistry Department of Imam Hussein University, Tehran, I.R. Iran A. Mirzaei Chemistry Department of Imam Hussein University, Tehran, I.R. Iran A. Salmani Oskuloo Chemistry Department of Imam Hussein University, Tehran, I.R. Iran Journal Article 2014 01 14 The special application of iron-manganese oxide nanocatalysts has been investigated in decomposition of hydrogen peroxide. In this research, iron-manganese oxide nanocomposites were synthesized by co-precipitation, sol-gel and mechanochemical methods using iron (III) nitrate, iron (II) sulfate and manganese (II) nitrate as starting materials. These nanocomposites were prepared on the various catalyst beds. The polyvinyl pyrrolidon was used as a capping agent to control the agglomeration of the nanoparticles. Nanocatalysts were identified by FT-IR, XRD and SEM. The sizes of nanoparticles were determined by XRD data and Scherer equation. Catalytic activity of prepared samples by co-precipitation method was higher than the samples prepared by other methods. Based on surface area analysis and BET data, using of sodium metasilicate bed led to the high surface area and catalytic activity. To optimize the catalytic activity of nanoparticles factors such as concentration, cations ratio, pH and calcination temperature were investigated.

https://www.ijnnonline.net/article_16986_2851389c12fee533abfa505b4c7551d1.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Analytical Investigation of MHD Jeffery–Hamel Nanofluid Flow in Non-Parallel Walls 241 248 16993 EN M. Sheikholeslami Department of Mechanical Engineering, Babol University of Technology, Babol, I. R. Iran H. Mollabasi Department of Civil Engineering, Babol University of Technology, Babol, I. R. Iran D. D. Ganji Department of Mechanical Engineering, Babol University of Technology, Babol, I. R. Iran Journal Article 2014 07 15 In this paper, Homotopy perturbation method (HPM) has been applied to investigate the effect of magnetic field on Cu-water nanofluid flow in non-parallel walls. The validity of HPM solutions were verified by comparing with numerical results obtained using a fourth order Runge–Kutta method. Effects of active parameters on flow have been presented graphically. The results show that velocity in boundary layer thickness decreased with increase of Reynolds number and nanoparticle volume friction and increased with increasing Hartmann number.

https://www.ijnnonline.net/article_16993_c5f31ecf4111f3bbfa2b36f851379d6e.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Investigation on Influences of Synthesis Methods on the Magnetic Properties of Trimetallic Nanoparticles of Iron-Cobalt-Manganese Supported by Magnesium Oxide 249 256 16997 EN A. Dahmardeh Department of Physics, Faculty of Science, University of Sistan and Baluchestan, Zahedan, I. R. Iran A. M. Davarpanah Department of Physics, Faculty of Science, University of Sistan and Baluchestan, Zahedan, I. R. Iran Journal Article 2015 06 16 Using Fe(NO3)3.9H2O, Co(NO3)2.6H2O and Mn(NO3)2.4H2O the magnetic properties of nanoparticles trimetalic Iron - Cobalt - Manganese, with supported Magnesium oxide have been prepared by Co-precipitation and Solvothermal methods. The prepared samples are characterized by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM) and Brunaer-Emmett-Teller (BET) surface area measurements. Data from SEM showed spherical and nearly uniform spherical shape particles for the samples which were synthesized with support by co-precipitation and by solvothermal methods, respectively. According to the patterns of XRD, the crystal size of the nanoparticles prepared by co-precipitation method with support are in the range of 25 to 30 nm and the size of the particles are in the range of 45 to 50 nm using solvothermal method. The results of the BET from all of the nanoparticles synthesized show that precursors have highest surface area of the calcinated samples. According to the VSM results taken at room temperature (RT), the samples with support after calcination were placed in the category of soft ferromagnetism.

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Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Novel Subtractor Design Based on Quantum-Dot Cellular Automata (QCA) Nanotechnology 257 262 17011 EN H. Dallaki Department of Electrical Eng, Shahid Bahonar University, Kerman, I. R. Iran M. Mehran Department of Electrical Eng, Shahid Bahonar University, Kerman, I. R. Iran Journal Article 2015 05 03 Quantum-dot cellular automaton (QCA) is a novel nanotechnology with a very different computational method in compared with CMOS, whereas placement of electrons in cells indicates digital information. This nanotechnology with specifications such as fast speed, high parallel processing, small area, low power consumption and higher switching frequency becomes a promising candidate for CMOS technology. In this paper, a new architecture of Half and Full subtractor based on the QCA is proposed. We take advantage of optimal XOR gate in designing these arithmetic units, which has been already designed based on the QCA majority voter gate. Using this XOR gate in the architecture of designed arithmetic units in this paper, reduces number of used QCA cells to 55 and 136 for Half and Full subtractor, respectively. Proposed design is more efficient in terms of cell counts, covered area and delay, than the conventional subtractors based on the QCA. These subtractors are designed and simulated using QCA Designer 2.0.3.

https://www.ijnnonline.net/article_17011_25819c8fe224033cc89bafa6a16cdd04.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Nanoscience and Nano Engineering in Concrete Advances , A Review 263 273 17012 EN M. Jafarbeglou Department of Nanotechnology, Amirkabir University of Technology, Hafez Ave, Tehran, I. R. Iran M. Abdouss Department of Chemistry, Amirkabir University of Technology, Hafez Ave, Tehran, I. R. Iran A. A. Ramezanianpour Department of Civil Engineering, Amirkabir University of Technology, Hafez Ave, Tehran, I. R. Iran Journal Article 2015 03 24 This paper reviews some progressive studies and innovations in cement and concrete materials in nano field. Due to the widespread acceptance of the special properties of nano materials and using them for engineering concrete performance, understanding and directing their properties are not achievable without instructing concepts and investigating interactions among components. Due to achievement of different properties of matters at the nanoscale, evaluating their physical and chemical effects on micro and macro scales in concrete and understanding the mechanisms that govern the interactions of nanoscale materials with appropriate characterization are essential. Advanced characterization techniques should be used for concrete to distinguish components of concrete multiphase composite. The other aim of this study was to better understand the importance of probably future advanced techniques and how they can be used as valuable tools to study the nanostructure and microstructure of cement and cement hydration products.

https://www.ijnnonline.net/article_17012_1780e9ba97e0174d231898c0bbfe79b5.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Catalytic Removal of Methane Over Cobalt Chromite (CoCr2O4) Nanospinels for CNG Vehicles 275 280 17013 EN Z. Kazemizadeh Research Institute of Applied Science, ACECR, Tehran, I. R. Iran Z. Bahrami Faculty of Nanotechnology, Semnan University, Semnan, I. R. Iran A. Khodadadi Catalysis, Nanostructured Materials Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, I. R. Iran F. Nazari Research Institute of Applied Science, ACECR, Tehran, I. R. Iran Journal Article 2014 08 03 Cobalt chromite (CoCr2O4) with normal spinel structure, shows catalytic activity for oxidation of unburned methane in the natural gas vehilcles (NGV). In this study, CoCr2O4 nanoparticles were synthesized through a conventional co-precipitation technique and investigated for the catalytic combustion of methane. Cobalt nitrate hexahydrate, chromium nitrate nonahydrate and ammonia solution (25%) were used as the starting materials. The obtained results show that the CoCr2O4 nanospinels were produced as single phase with an average diameter between 25-50 nm.Characterization studies by X- ray diffraction (XRD), N2 adsorption/desorption(BET), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), temperature program oxidation (TPO) and O2- temperature programmed desorption (O2-TPD) were carried out.The specific surface area (SBET) of the synthesized nanoparticles was measured using multiple point Brunauer–Emmett–Teller (BET) method.40 m2.g-1 was obtained for CoCr2O4 nanoparticles. The results revealed that cobalt chromite nanoparticles have significant capability for methane conversion at 435oC.

https://www.ijnnonline.net/article_17013_3ee2f957cab60715fac7a587a62fab46.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Biogenic Synthesis of Silver Nanoparticles Using Mustard and Its Characterization 281 288 17014 EN M. Khatami 1. Department of Biotechnology, Shahid Bahonar University of Kerman, Kerman, I.R. Iran. 3. Young Researcher Society, Shahid Bahonar University of Kerman, I.R. Iran. M. Soltani Nejad 2. Department of Plant Pathology, Shahid Bahonar University of Kerman, Kerman, I.R. Iran. 3. Young Researcher Society, Shahid Bahonar University of Kerman, I.R. Iran. Sh. Pourseyedi 1. Department of Biotechnology, Shahid Bahonar University of Kerman, Kerman, I.R. Iran. Journal Article 2014 06 17 The field of nanobiotechnology mainly encompasses with physics, biology, chemistry and material sciences and it develops novel therapeutic nano-scale materials for biomedical, drug delivery, cancer therapy and pharmaceutical applications. Silver nanoparticles (AgNPs) have unique physiochemical, biological and environmental properties which make them useful in a wide range of applications, so AgNPs was synthesized using mustard plant. The formation and characterization of AgNPs were investigated using UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR),X-ray diffraction (XRD) and transmission electron microscopy (TEM). UV-visible spectroscopy showed surface plasmon resonance peak at about 411 nm. FTIR indicated the role of different functional groups (carboxyl, amine, aromatic and hydroxyl) in the formation process of AgNPs. TEM analysis showed spherical particles with size range 1-35 nm and an average size 14 nm. Our measurements showed that mustard seed exudates could mediate facile and eco-friendly biosynthesis of colloidal spherical AgNPs. Also, we studied influence of concentrations of silver nitrate on stability of biosynthesized AgNPs. The results clearly showed that the stability of biosynthesized AgNPs strongly depended on the concentration of used silver ions and increased with increasing the concentration of silver ions in the biosynthesis process. Our results indicated that AgNPs synthesized at higher concentrations of silver nitrate were more stable.

https://www.ijnnonline.net/article_17014_373321f3ae1bebd3f6818359b0f8f6e6.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 4 2015 12 01 Fabrication and Characterization of Visible Light active Fe-TiO2 Nanocomposites as Nanophotocatalyst 289 293 17015 EN M. Mirzaei Transport Phenomena and Nano Technology (TPNT) laboratory, Dept. of Chem. Eng., Faculty of Engineering, University of Tehran, Tehran, I. R. Iran H. Ahadi Transport Phenomena and Nano Technology (TPNT) laboratory, Dept. of Chem. Eng., Faculty of Engineering, University of Tehran, Tehran, I. R. Iran M. Shariaty-Niassar Transport Phenomena and Nano Technology (TPNT) laboratory, Dept. of Chem. Eng., Faculty of Engineering, University of Tehran, Tehran, I. R. Iran M. Akbari Transport Phenomena and Nano Technology (TPNT) laboratory, Dept. of Chem. Eng., Faculty of Engineering, University of Tehran, Tehran, I. R. Iran Journal Article 2014 02 07 In this research Fe-TiO2 nanocomposites with different molar ratios of Fe/Ti were prepared as nano-photocatalyst using a modified Sol-Gel process at ambient temperature. Crystallographic properties of nanocomposites were characterized by X-ray Diffraction (XRD). Surface morphology and mean particle size of nanocomposites were specified by Field Emission Scanning Electron Microscopy (FESEM) and light absorption spectrum of nanocomposites was evaluated by Diffuse Reflectance Spectra (DRS). XRD patterns revealed that Fe3+ is successfully substituted by Ti4+ in TiO2 lattice and no rutile phase is present in nanocomposites. From FESEM images it was specified that mean particle size of nanocomposites changed in the range of 28-47nm and narrow size distribution was seen. DRS analysis represented that by doping of Fe into the TiO2 lattice, light absorption spectrum of TiO2 shifted to visible light spectrum and led to decrement in energy band gap of TiO2.Band gap of nano-photocatalysts was in the range of 1.98-2.89 eV.

https://www.ijnnonline.net/article_17015_690f9037d32604b195becdf8dce82890.pdf