فهرست مطالب

International Journal Of Bio-Inorganic Hybrid Nanomaterials - Volume:7 Issue:3, 2018
  • Volume:7 Issue:3, 2018
  • تاریخ انتشار: 1397/07/09
  • تعداد عناوین: 8
|
  • H. Bagheri*, H. Hashemipour Pages 199-204

    A carbon nanotube (CNT) is a miniature cylindrical carbon structure that has hexagonalgraphite molecules attached at the edges. Nanotubes look like a powder or black soot, but they'reactually rolled-up sheets of graphene that form hollow strands with walls that are only one atom thick.Carbon nanotube has been one of the most actively explored materials in recent year(s) due to itsunique properties and wide range of applications. Various methods have been adopted to produce CNT,including laser ablation, arc discharge and CVD process. Chemical vapor deposition (CVD) is parent to afamily of processes whereby a solid material is deposited from a vapor by a chemical reaction occurringon or in the vicinity of a normally heated substrate surface. The resulting solid material is in the form ofa thin film, powder, or single crystal. Among these methods, the chemical vapor deposition method is acheap and simple method. Supercritical fluids, particularly supercritical CO2, have been used in variousareas such as nanoparticle and CNT synthesis. In this paper the CNT synthesis methods based onCVD and using supercritical fluids were studied.

    Keywords: Carbon Nanotube, CNT, CVD, Method, Nanotube, Supercritical
  • F. Shabani, S. Jamehbozorgi, *, M. Sheikhpour Pages 205-211

    An anti-tumor compound as N3-{phenyl [(4-pyridylcarbonyl) amino] methyl} weresynthesized and identified (NPPA). Fe (III), Co(II) and Pd(II) metal complexes of this ligand preparedby reaction of chloride salt of Fe (III), Co(II) and Pd(II) with NPPA in dry acetonitrile. Identification andCharacterization of the ligand was performed by FT-IR, 1H-NMR spectroscopy and elemental analysisand all complexes were characterized by several techniques using elemental analyze (C, H, N), FTIR,1H-NMR (except Co complex), electronic spectroscopy and molar conductance measurements.These new compounds were used to biological studies; and its anticancer properties against the twotypes of cancer cells such as k562 (human chronic myeloid leukemia) and Jurkat (human T lymphocytecarcinoma) was revealed. The results of in vitro activities were very interesting and promising. Theseresults showed that complexes offer a new outlook for chemotherapy. It should be noted that the resultssuggest that complex showed greater effects than ligand.

    Keywords: Anti-tumor, anticancer, In vitro activities, N3-{phenyl[(4 pyridylcarbonyl)amino]methyl}, Fe(III), Co(II), Pd(II) complexes, Synthesis
  • Sayed N. Hedayat, *, M. T. Ahmadi, Razali Bin Ismail Pages 213-219

    Graphene is determined by a wonderful carrier transport property and high sensitivityat the surface of a single molecule, making them great as resources used in Nano electronic use.TGN is modeled in form of three honeycomb lattices with pairs of in-equivalent sites as {A1, B1},{A2, B2}, and {A3, B3} which are located in the top, center and bottom layers, respectively. Trilayergraphene has two types of stable configurations, ABA and ABC stacking orders. In both types, the firsttwo layers are Bernal-stacked, where one sub lattice of the middle layer is located above the center ofthe hexagons of the bottom layer. The TGN is shown to have different electronic properties which arestrongly dependent on the interlayer stacking sequence. ABA-stacked TGN with width and thicknessless than De-Broglie wave length can be assumed as a one dimensional material. The present researchmodels transmission coefficient of the Schotcky structure in the graphene-based transistor based onsemiconducting channel width and then analysis its quantum properties given dependence on structuralparameter. At the same time, the quantum current is presented based on the transmission coefficient forthe trilayer graphene. Then, we obtain the quantum current of the proposed structure in the degenerateand non-degenerate states and compare it with experimental data.

    Keywords: Current-Voltage characteristic, Degenerate, nondegenerate regime, Quantum current, Transmission coefficient, Trilayer graphene, Transistor
  • M. Farahmandjou, *, M. Dastpak, Z. Panji Pages 221-226

    Recently, cerium oxide (CeO2) nanoparticles have been widely used in engineering andmedical sciences due to the diversity of their applications. Fe-Ce nanoparticles were synthesized bysimple co-precipitation method via iron nitrate (Fe(NO3)3.9H2O) and cerium nitrate (Ce(NO3)3.6H2O) asprecursor in the presence of cetyltrimethylammonium bromide (CTAB) surfactant. The samples werecharacterized by high resolution transmission electron microscopy (HRTEM), field effect scanningelectron microscopy (FESEM), X-ray diffraction (XRD), vibration sampling magnetometer (VSM), andFourier transform infrared spectroscopy (FTIR) in different temperature. The XRD results showed thatFe-doped CeO2 was single-phased with a cubic structure. The particle size of as-prepared sampleswas around 45 nm and for annealed one was around 32 nm in diameter at 500 °C for 3 hours. TheTEM studies showed the squared-like shaped nanosized particles with good distribution particle. Thesharp peaks in FTIR spectrum determined the element of Fe-Ce nanoparticles. The result of magneticmeasurements showed coercive field and saturation magnetism around 1632 G and 0.055 emu/g,respectively for as-prepared samples.

    Keywords: Chemical synthesis, Coprecipitation method, CTAB, Fe2O3, CeO2, Nanocrystals
  • M. Rajabi, M. Khaleghian, *, E. Balali Pages 227-239

    To determine the non-bonded interaction between methyl benzoate and boron nitridenanotube, we focused on an armchair single-wall boron nitride nanotube (9,9) With length 5 angstroms.The geometry of molecules was optimized using B3LYP method with 6-31g* basis set. Also reactivityand stability of methyl benzoate and boron nitride nanotube (9,9) was checked. Then NBO, FREQ,adsorption energy of methyl benzoate alone and in the presence of BNNT Field were derived to estimatemethyl benzoate structural stability. The results of any order was found reduce of reactivity and increaseof stability for methyl benzoate in the presence BNNT field.

    Keywords: BNNTs, DFT, FREQ, Methyl benzoate, NBO, Quantum mechanical study
  • A. Moghimi, *, M. Yari Pages 241-253

    A preconcentration/separation procedure is presented for the solid phase extractionof trace cadmium and lead ions as their 2-propylpiperidine-1-carbodithioate (PPCD) chelates inenvironmental samples on Nano Graphene, prior to cadmium and lead determinations by atomicabsorption spectrometry. The preconcentration procedure was optimized by using model solutionscontaining cadmium and lead ions. The influences of pH of the model solutions, amounts of PPCD,eluent type and volume etc. were investigated. Also the effects of the matrix constituents of the sampleswere also examined. Separation of cadmium and lead from real samples was achieved quantitatively.The procedure presented was checked with the analysis of standard reference materials (IAEA-336Lichen and SRM 1515 Apple leaves). The preconcentration procedure was applied for the lead andcadmium contents of the natural water samples, some salts with satisfactory results (recoveries >95%,relative standard deviations <7%).

    Keywords: Atomic absorption spectrometry, Cadmium(II), Extracting, Lead(II), Nano Graphene, Preconcentration, Solid phase extraction
  • R. Mohammadi, R. Rasoolzadeh*, A. Esfarjani Pages 255-265

    The investigation of the anticancer drugs will be important because of the proliferation ofcancer. We want to take steps to improve public health. The combination of two carbon nanotubes (singlewall nanotube and multi-wall nanotube) and Sup90-Dota (an anticancer drug) was investigated basedon Molecular Mechanic and Semi-Empirical methods. Our goal is to investigate the transfer of carbonnanotubes by drug Sup90- Dota and the study of structural changes caused by the interaction of thisanticancer drug combination with the nanotubes. We study of different parameters such as total energy,potential energy and kinetic energy and time of simulations are 20 ns. Calculation and geometricaloptimization in different temperature (295,298,310 and 315 Kelvin) were conducted via Monte Carlomethod (Amber, Bio+, MM+, and OPLS). The semi-empirical calculations such as total energy, bindingenergy, isolated atomic energy, electronic energy, core–core interaction and heat of formation in AM1,RM1, PM3, MNDO, INDO and CNDO for Sup90- Dota and CNT- Sup90- Dota complex. Analysis ofSup90- Dota and its interaction with CNTs show that this carrier can be applied to improve the activitiesof this anti-cancer drug.

    Keywords: anticancer, Carbon Nanotube, Molecular Mechanic, Semi-Empirical, Sup90 – Dota
  • F. Karbasi* Pages 267-277

    In this study, polyvinyl alcohol- Nanofibrillated cellulose –Montmorillonite (PVA-NFC-MMT)and Ethylene-vinyl acetate- Nanofibrillated cellulose –Montmorillonite (EVA-NFC-MMT) nanocompositescontaining 2% weight of NFC and MMT were prepared by melt blending method. Then, the effect ofNFC and MMT as reinforcing materials on biodegradability, morphology, and mechanical, thermal andbarrier properties of films was investigated. Field Emission Scanning Electron Microscopy images ofPVA-NFC-MMT and EVA-NFC-MMT indicated simultaneous uniform dispersion of NFC and MMT in thepolymer matrix leading to the highest values of transparency and strength compared to control samples.Results for Differential Scanning Calorimetry indicated an increase in glass transition temperature andthe crystallinity of PVA-NFC-MMT and EVA-NFC-MMT, compared to films without NFC and MMT.Oxygen permeability was decreased from 28.5 and 760 cc/m2.day.atm in pure PVA and EVA to 3.7and 114 cc/m2. day.atm in PVA-NFC- MMT and EVA-NFC-MMT, respectively. Compared to the controlsample, the tensile strength of PVA-NFC-MMT and EVA-NFC-MMT was increased by 20 and 44.4%,respectively. Biodegradability tests of films under soil indicated the improved degradation of PVA andEVA due to the simultaneous presence of NFC and MMT in such a way that they were degraded by 9.56and 8.36%, after 120 days under soil burial conditions, respectively.

    Keywords: Biodegradation, EVA, Food Packaging, MMT, Nanocomposite, NFC, PVA