American Journal of Nanosciences

Archive

Volume 3, Issue 3, September 2017

  • Surface Morphology and Magnetic Properties of Isolated Cylindrical Nickel Nanowires

    Musaab Salman Sultan

    Issue: Volume 3, Issue 3, September 2017
    Pages: 30-38
    Received: 10 May 2017
    Accepted: 5 June 2017
    Published: 4 July 2017
    DOI: 10.11648/j.ajn.20170303.11
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    Abstract: In this article, the surface morphology and magnetic properties of isolated cylindrical nickel (Ni) nanowires fabricated by electrodeposition have been thoroughly investigated using scanning electron microscopy and Magneto-Optical Kerr Effect (MOKE) magnetometry, respectively. The surfaces of most nanowires were found to be homogenous, uniform, and... Show More
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  • Fully Crystallized Silicon Nanostructured Film Prepared at Low Temperatures by Plasma-Enhanced Chemical Vapor Deposition

    Dmitry Evgenyevich Milovzorov

    Issue: Volume 3, Issue 3, September 2017
    Pages: 39-46
    Received: 14 May 2017
    Accepted: 6 June 2017
    Published: 14 July 2017
    DOI: 10.11648/j.ajn.20170303.12
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    The chemical bonding properties was studied by using the Fourier-transformed infrared spectroscopy in the range from500 cm-1 to 2300 cm-1. Spectral peak at wave number of 1100 cm-1 is related to the Si-O-Si bonding configuration. Hydrogenation of film can be estimated by using spectral lines at 2100 cm-1 and 2080 cm-1. The Si-O dipoles which are located into silicon film play great role because of electron affinity for oxygen. Photoluminescent (PL) properties are significant for the films which were made by using hydrogenation of silicon. Fourier-transformed infrared spectra of film’s absorption show the changes in chemicals in the film: from the oxygen incorporation into silicon to the elimination the Si-O bonding by adding the silicon tetra fluoride into electrochemical reactor, and increasing the Si-F density of bonds. The dissociation of SiF4 molecule causes the appearance of fluorine on the film surface, but the hydrogen atoms react with fluorine and excess fluorine is removed. By increase of SiF4 flow rate, the Si-O-Si bridges were etched by HF acid. The size effect in PL from nanocrystalline silicon film can be explained by means of statistical method. We suggested that the ƒ(x) is distribution function of crystallites in their sizes, θ(x) is a quantum efficiency of nanocrystals. Accordingly, the quantity of emitted hydrogenizednanocrystals by band-to-band radiative transitions is important to estimate the PL linear optical response. The processing of grown hydrogeneited silicon nanocrystalline film by annealing and etching the oxides results in preparation of fully crystallized silicon film for manufacturingthe photonic devices with significant quantum yield. Abstract: I studied the nanocrystalline silicon thin films by means of photoluminescent spectroscopy, Raman spectroscopy and Fourier-transformed infrared spectroscopy technique. The chemical bonding properties was studied by using the Fourier-transformed infrared spectroscopy in the range from500 cm-1 to 2300 cm-1. Spectral peak at wave number of 1100 cm-1 i... Show More
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  • Optimization of Optical Nanoantenna Based on Structures Chiral Photonic Crystal

    Mezache Zinelabiddine, Seghaouil Samir, Chaibi Walid, Benabdelaziz Fatiha

    Issue: Volume 3, Issue 3, September 2017
    Pages: 47-52
    Received: 11 May 2017
    Accepted: 5 July 2017
    Published: 16 August 2017
    DOI: 10.11648/j.ajn.20170303.13
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    Abstract: A novel Optical nanoantenna based on chiral photonic crystals is studied via numerical simulation under environment COMSOL Multiphysics 5.0. We have shown new model of optical nanoantenna. Where this miniaturized antenna has great potential application in biomedical and nanotechnologies. Numerical results are given and discussed to confirm these ch... Show More
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  • Numerical Simulation of CuInSe2 (CIS) Thin Film Solar Cell with (ZnO, ZnO:F) Buffer Layers

    T. Belal, R. Tala-Ighil Zair, F. Ghezal

    Issue: Volume 3, Issue 3, September 2017
    Pages: 53-58
    Received: 8 April 2017
    Accepted: 14 August 2017
    Published: 23 October 2017
    DOI: 10.11648/j.ajn.20170303.14
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    Abstract: This study focuses on the solar cells based on CIS simulation with buffer layer zinc oxide (ZnO) and fluorine-doped zinc oxide (ZnO:F). ZnO is a multifunctional material with several applications in electronics and photovoltaics, with multiple possibilities of synthesis involve inexpensive methods. ZnO (ZnO:F) is a prominent candidate to be an alte... Show More
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  • Study the Effect of Solvent / Non-solvent on Polycarbonate

    Raad S. Sabry, Muntazer I. Al-mosawi

    Issue: Volume 3, Issue 3, September 2017
    Pages: 59-62
    Received: 20 March 2017
    Accepted: 1 April 2017
    Published: 23 October 2017
    DOI: 10.11648/j.ajn.20170303.15
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    Abstract: A stable superhydrophobic PC surface was obtained by a simple phase separation method at room temperature. The water contact angle of the superhydrophobic PC surface is 156± 2°. FESEM image exhibited that the PC surface composed of flower-like shaped linked together centrally with branches offered roughness on the surface with a hierarchical micro/... Show More
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