Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301High Efficiencies in Nanoscale Poly(3-Hexylthiophene)/Fullerene Solar Cells11238326ENS.AgbolaghiChemical Engineering Department, Faculty of Engineering, Azarbaijan Shahid Madani University, P.O. BOX: 5375171379, Tabriz, Iran.S.AbbaspoorSchool of Engineering, Damghan University, P.O. BOX: 36716–41167, Damghan, Iran.Journal Article20171229<em> A modified morphology was introduced for poly(3-hexylthiophene):phenyl-C71-butyric acid methyl ester (P3HT:PC71BM) bulk heterojunction (BHJ) solar cells by thermal and solvent annealing treatments in the presence of hydrophilic-hydrophobic block copolymers. Power conversion efficiency (PCE) plummet was prohibited during both thermal and solvent treatments for all BHJ devices modified with either hydrophobic- or hydrophilic-based copolymers. It was originated from ever increasing trend of fill factor (FF) and increasing or marginally decreasing trend of short circuit current density (J<sub>sc</sub>). Although PCEs were higher in untreated hydrophobic-compatibilized devices, the hydrophilic-compatibilized systems further benefited from thermal and solvent treatments. The vertical homogeneity increased for compatibilized BHJs during annealing processes, leading to very high FFs around 70%. The maximum values of Jsc and PCE for the well-controlled photovoltaic systems were 12.10 mA/cm<sup>2</sup> and 4.85%, respectively.</em>https://www.ijnnonline.net/article_38326_5148de37b36193bcf588c1bc4a3833c0.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301Application of Supercritical Fluid Technology for Preparation of Drug Loaded Solid Lipid Nanoparticles133338327ENZ.AkbariDepartment of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran. M.AmanlouDepartment of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran. J.Karimi-SabetJaberEbneHayyan National Research Laboratory, NSTRI, Tehran, Iran.A.GolestaniDepartment of Biochemistry, Faculty of medicine, Tehran University of Medical Sciences, Tehran, Iran.M.Shariaty NiassarDepartment of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran. 0000-0002-4477-8397Journal Article20140616<em> Small changes in pressure or temperature, close to the critical point, lead to large changes in solubility of supercritical carbon dioxide (CO<sub>2</sub>). Environmentally friendly supercritical CO<sub>2 </sub>is the most popular and inexpensive solvent which has been used for preparation of nanodrugs and nanocarriers in drug delivery system with supercritical fluid technology. Delivery of a drug is one of the most challenging research areas in pharmaceutical sciences. With a combination of drugs and innovative delivery systems such as lipid nanocarriers, drugs efficiency and safety have been improved significantly. There are various techniques available to produce drug loaded solid lipid nanoparticles. Among them, supercritical fluid technology has been identified as potentially effective and applicable approach which has attracted increasing attention during recent years. This technique has several advantages such as avoid the use of solvents, particles are obtained as a dry powder, instead of suspensions, mild pressure and temperature conditions can be applied. Nevertheless, little attention has been paid to formation of drug loaded solid lipid nanoparticles by supercritical fluid technology. In this paper, we present a brief introduction to solid lipid nanocarriers. Then a general overview of different processes of supercritical fluid technology has been provided and also case studies are presented to show the potential benefits of this approach in drug loaded solid lipid nanoparticle production. </em>https://www.ijnnonline.net/article_38327_351833a0bcc1c8cee856755bfc03c40a.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301Synthesis of Magnetic Graphene Oxide Nanocomposite for Adsorption Removal of Reactive Red 195: Modelling and Optimizing via Central Composite Design354838328ENZ.Monsef KhoshhesabDepartment of Chemistry, Payame Noor University, Tehran, Iran.Z.AyaziDepartment of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, P.O. Box 53714-161 Tabriz, Iran.M.DargahiDepartment of Chemistry, Payame Noor University, Tehran, Iran.Journal Article20180117<em> In this work, magnetic graphene oxide (MGO) was prepared by in situ synthesis of magnetite nanoparticles in the presence of graphene oxide (GO). The prepared nanocomposite was characterized by applying scanning electron microscopy (SEM), X-ray diffraction (XRD, Fourier transform infrared spectroscopy (FTIR) and </em><em>vibrating sample magnetometer (VSM).</em><em> MGO was applied as an efficient nano-sorbent for adsorptive removal of reactive red 195 (RR195). The adsorptive removal process of RR195 was modeled and optimized using the response surface methodology (RSM) based on central composite design (CCD). Important parameters influencing the adsorption of RR195 including pH, contact time, initial concentration of RR195 and adsorbent amount were selected as input variables for RSM.</em><em> The highest adsorption capacity of MGO sorbent (77.2 mg g<sup>-1</sup>) was obtained at an initial dye concentration of 325 mg L<sup>-1</sup>, contact time of 65 min, adsorbent amount of 89.4 mg, and pH of 3.</em> <em> Moreover, the adsorption isotherms and kinetics studies were performed, indicating that the adsorption process best fitted in pseudo-second-order model and Langmuir isotherm model, in which the maximum adsorption capacity, q<sub>m</sub>, was calculated to be 80 mg g<sup>-1</sup>. </em>https://www.ijnnonline.net/article_38328_572d375abf307ce8a9652a76f02df10e.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301The Electronic and Optical Properties of Pristine, Fluorinated and Chlorinated Pentacene Molecules: An ab-initio Study495838329ENR.Pilevar ShahriDepartment of Physics, Payame Noor University (PNU), P.O. Box 19395-3697, Tehran, Iran.S. S.MousaviDepartment of Physics, Payame Noor University (PNU), P.O. Box 19395-3697, Tehran, Iran.M. R.BenamDepartment of Physics, Payame Noor University (PNU), P.O. Box 19395-3697, Tehran, Iran.Journal Article20180808<em> </em><em>In This research the effect of fluorine and chlorine substituents on the electronic and optical</em><em>properties of pentacene molecule </em><em>have been investigated </em><em>based on density functional theory as implemented in SIESTA </em><em>code. </em><em>The results show thatthe full replacement of hydrogen atoms with fluorine and chlorine in pentacene molecule, leads to shrink the HOMO-LUMO gap by the value of 0.14 and 0.46 eV, respectively. Moreover, the cohesive energy of fluorinated (F-PENT) and chlorinated pentacene (Cl-PENT) follow</em> <em>F-PENT< PENT < Cl-PENT order with respect to the cohesive energy value of -7.54 eV corresponding to pristine pentacene. Therefore F- PENT shows better stability than others. The results of optical properties demonstrate that fluorinated and chlorinated pentacene have greater dielectric constant and refractive index with respect to pristine pentacene. The reflectivity feature along the long axis of pentacene molecule undergoes a red shift and accordingly the violet color of pentacene changes to blue and green by the influence of fluorination and chlorination, respectively. These results can be utilized to improve molecular electronic and optical devices. </em>https://www.ijnnonline.net/article_38329_5d2cbbbc9b4754cc72672b40296c76ec.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301The Effect of Different Dopants (Cr, Mn, Fe, Co, Cu and Ni) on Photocatalytic Properties of ZnO Nanostructures596538330ENA.Anaraki FiroozDepartment of Chemistry, Faculty of Science, Shahid Rajaee Teacher Training University, P.O. Box 167855-163, Tehran, Iran.M.KeyhaniDepartment of Chemistry, Faculty of Science, Shahid Rajaee Teacher Training University, P.O. Box 167855-163, Tehran, Iran.Journal Article20181003<em> ZnO structures with different dopants (</em><em>1</em><em>mol% Cr, Mn, Fe, Co, Cu and Ni) have been synthesized via a simple hydrothermal method using sucrose as a template. These doped ZnO nanostructures characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL). The photocatalytic property of these synthesized materials was studied by a photocatalytic characterization system. The PL results confirmed that these dopants showed a significant effect on photoluminescence properties of ZnO structure. Among the synthesized photocatalysts, Ni doped ZnO showed a significant enhancement of photodecolorization capability (98.6 %) toward Congo red dye in UV irradiation. Also, it showed the highest dye adsorption (80%) at dark conditions. The improvement of decolorization of this photocatalyst might be attributed to enhancement the chance of the separation of electrons and holes, high capacity of dye adsorption and presence of defects in its structure. Preliminary experiment suggested Ni doped ZnO as effective photocatalyst for treating some pollution such as azo dyes. </em>https://www.ijnnonline.net/article_38330_6fc9706ccfb7b37d1f715ce48f82c226.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416120200301Synthesis and Structural Studies of Nickel Doped Cobalt Ferrite Thin Films677238331ENB.SinghDepartment of Applied Physics, Jabalpur Engineering College, Jabalpur, M. P., India.0000-0002-4057-0601N.KatariyaShri Vaishnav Vidyapeeth Vishwavidyalaya, Indore, M. P., India. V.GanesanUGC-DAE, Consortium for scientific research, Indore, M. P., India.S.ShrivastavaSchool of Studies in Physics, Vikram University, Ujjain, M. P., India. Journal Article20190218<em> </em><em>The growth and structural study of Nickel doped Cobalt ferrite thin films on glass substrate using spray pyrolysis technique have been done. The structural studies confirmed the growth of polycrystalline film having cubic structure with Fd3m space group. The x ray density was found to increase with Ni concentration, where as the reduction, in crystalline size, was found in XRD measurements. The AFM studies also showed the grain size and roughness of the films decrease with increase in Ni concentration.</em>https://www.ijnnonline.net/article_38331_11f26f3efee36d3d5d140d9a43ae8c00.pdf