Volume-5 , Issue-6 , Dec 2017, ISSN 2348-3423 (Online) Go Back

• Open Access   Article

  Investigation of Structural and Spectroscopic Properties of Nanostructured CdS Films

  P.K. Mochahari

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.6 , pp.1-4, Dec-2017

  CrossRef-DOI:   https://doi.org/10.26438/ijsrpas/v5i6.14

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  Abstract
  Nanostructured cadmium sulphide (CdS) films have been prepared on glass substrates by chemical bath deposition (CBD) method at room temperature. Analysis of the samples by x-ray diffraction (XRD) exhibits the films have cubic phase structure of CdS. Different structural parameters such as crystallite size (using Scherrer’s relation) and dislocation density of the samples have been estimated. Optical absorption spectra of the sample falls in the visible region and various optical parameters such as optical band gap energy (using Tauc’s formula), refractive index as well as dielectric constant have been calculated. Chemical composition of the samples has been investigated using fourier transform infra red (FTIR) spectroscopy.

  Key-Words / Index Term
  XRD, optical band gap, refractive index, FTIR

  References
  [1] J. Zhao, J. A. Bardecker, A. M. Munro, et al., “Efficient CdSe/CdS Quantum Dot Light-Emitting Diodes Using a Thermally Polymerized Hole Transport Layer”, Nano Lett., Vol. 6, pp 463–467, 2006.
  [2] L. Yadava, R. Verma, R. Dwivedi, “Sensing properties of CdS-doped tin oxide thick film gas sensor”, Sensors and Actuators B: Chemical, Vol. 144, pp. 37-42, 2010.
  [3] G. Larramona, C. Choné, A. Jacob, et al., “Nanostructured Photovoltaic Cell of the Type Titanium Dioxide, Cadmium Sulfide Thin Coating, and Copper Thiocyanate Showing High Quantum Efficiency”, Chem. Mater., Vol. 18, pp. 1688–1696, 2006.
  [4] K. J. Wu, K. C. Chu, C. Y. Chao, Y. F. Chen, “CdS Nanorods Imbedded in Liquid Crystal Cells for Smart Optoelectronic Devices”, Nano Letters, Vol. 7, pp. 1908-1913, 2007.
  [5] N. R. Paudel, K. A. Wieland, A. D. Compaan, “Ultrathin CdS/CdTe solar cells by sputtering”, Solar Energy Materials and Solar Cells, Vol. 105, pp. 109-112, 2012.
  [6] A. H. Rubel, J. Podder, “Structural and Electrical Transport Properties of CdS and Al-doped CdS Thin Films Deposited by Spray Pyrolysis”, J. Sci. Res., Vol 4, pp.11-19, 2012.
  [7] S. P. Mondal, A. Dhar, S. K. Ray, “Optical properties of CdS nanowires prepared by dc electrochemical deposition in porous alumina template”, Materials Science in Semiconductor Processing, Vol. 10, pp. 185-193, 2007.
  [8] B. Ullrich, H. Sakai, Y. Segawa, “Optoelectronic properties of thin film CdS formed by ultraviolet and infrared pulsed-laser deposition”, Thin Solid Films, Vol. 385, pp. 220-224, 2001.
  [9] A. Ashour, N. El-Kadry, S. A. Mahmoud, “On the electrical and optical properties of CdS films thermally deposited by a modified source”, Thin Solid Films, Vol. 269, pp. 117-120, 1995.
  [10] G. Sasikala, P. Thilakan, C. Subramanian, “Modification in the chemical bath deposition apparatus, growth and characterization of CdS semiconducting thin films for photovoltaic applications”, Solar Energy Materials and Solar Cells, Vol. 62, pp. 275-293, 2000.
  [11] D. Bhattacharyya, M. J. Carter, “Effect of substrate on the structural and optical properties of chemical-bath-deposited CdS films”, Thin Solid Films, Vol. 288, pp. 176-181, 1996.
  [12] S. Sen, S. K. Halder, S. P. Sengupta, “An X-ray line broadening analysis in the vacuum-evaporated silver films”, J. Phys. Soc. Japan, Vol. 38, pp. 1641-1647, 1975.
  [13] S. Senthilarasu, R. Sathyamoorthy, S. Lalitha, “Synthesis and characterization of β-FeSi2 grown by thermal annealing of Fe/Si bilayers for photovoltaic applications”, Solar Energy Materials & Solar Cells, Vol. 82, pp. 299-305, 2004.
  [14] J. Cheng, D. B. Fan, H. Wang, et al., “Chemical bath deposition of crystalline ZnS thin films”, Semicond. Sci. Technol. Vol. 18, pp. 676-679, 2000.
  [15] J. Tauc (ed.), “Amorphous and liquid semiconductors”, Plenum publication, New York, pp. 159, 1974.
  [16] R. Banerjee, R. Jaykrishnan, R. Banerjee, P. Ayyub, “Effect of the size-induced structural transformation on the band gap in CdS nanoparticles”, Journal of Physics: Condensed Matter, Vol. 12, pp.10647, 2000.
  [17] P. Herve, L. K. J. Vandamme, “General relation between refractive index and energy gap in semiconductors”, Infrared Phys. Technol. Vol. 35, pp. 609-615, 1994.
  [18] G. A. Samara, “Temperature and pressure dependences of the dielectric constants of semiconductors”, Phys. Rev. B, Vol. 27, pp. 3494-3505, 1983.
  [19] R. Devi, P. Purkayastha, P. K. Kalita, B. K. Sarma, “Synthesis of nanocrystalline CdS thin films in PVA matrix”, Bull. Mater. Sci. Vol. 30, pp. 123-128, 2007.
  [20] D. H. Williams, I. Fleming, “Spectroscopic methods in organic chemistry”, (Tata McGraw-Hill: New Delhi) 5th ed., pp. 57, 2004.
  [21] A. Periasamy, S. Gunasekaran, et al., Proceedings of national conference on spectrophysics (ed.), pp. 95, 1997.
  

  Citation
  P.K. Mochahari, "Investigation of Structural and Spectroscopic Properties of Nanostructured CdS Films," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.6, pp.1-4, 2017

• Open Access   Article

  Synthesis and Characterization of MnO2 Nanoparticles: Study of Structural and Optical Properties

  S.Ganeshan, P.Ramasundari, A.Elangovan, G.Arivazhagan, R.Vijayalakshmi

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.6 , pp.5-8, Dec-2017

  CrossRef-DOI:   https://doi.org/10.26438/ijsrpas/v5i6.58

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  Abstract
  Manganese dioxide nanostructures are of considerable importance in technological applications and have been intensively investigated as promising electrode material in primary/secondary batteries and electrochemical capacitors due to their excellent electrochemical properties, low cost, environmentally benign and ease of preparation. MnO2 nanoparticles are synthesized using Co-Precipitation method. The structural and optical characterization was carried out using Powder X-ray Diffraction method, Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopy, The powder X-ray Diffraction studies revealed the polycrystalline nature of MnO2 nanoparticles. SEM images showed that the particles are almost spherical with varying sizes. Energy Dispersive X-ray Spectroscopy analysis confirms the presence of Manganese and Oxygen.

  Key-Words / Index Term
  MnO2 nanoparticle, Co-Precipitation Method, EDAX, SEM, XRD

  References
  [1]. Y.Chen,Y.Hong,Y.Ma and J.Li, “Synthesis and formation mechanism of urchin like nano/micro hybrid - MnO2”, Journal of Alloys and Compounds, Vol.490, p.p. 2880- 2881 , (2002)
  [2]. X.Lang, A.Hirata, T.Fujita and M.Chem, “Nanoporous Metal/Oxide Hybrid Electrodes for Electrochemical Supercapacitors”, Nature Technology, Vol.6, No.4,2011, pp.232-236
  [3]. [3] W.Wei , X.Cui, W.Chen and D.G.Ivey, “Manganese Oxide-Based Materials as Electrochemical Supercapacitor Electrodes,” Chemical Society Reviews, Vol.40, No.3, 2011, pp.1697-1721
  [4]. W.Li, G.li, J.Sun,R.Zou,K.Xu,Y.Sun,Z.Chem,J.Yang and J.Hu , “Hierarchical Heterostructures of MnO2 Nanosheets or Nanorods Grown on Au-Coated Co3O4 Porous Nanowalls for High-Performance Pseudocapacitance,” Nanoscale, Vol.5, No.7, (2013), pp.2901- 2908.
  [5]. W.Li, Q.Liu, Y.Sun, J.Sun,R.Zou, G.li,K.Hu,G.Ma, J.Yang, ,Z.Chem, and J.Hu, “MnO2 Ultralong Nanowires with Better Electrical Conductivity and Enchanced Supercapacitor Performances,” Journal of Materials Chemistry, Vol.22, No.30, (2012), pp 14864- 14867
  [6]. M.M.Atabaki,R.Kovacevic, Electron Matter,Lett 9,133 (2013)
  [7]. C.Hu,T.Tsou, Electrochemistry Communications, 4, 105 (2002)
  [8]. M.Topuin,T.Brousse, D.Belenger, Chemistry of Materials , 14, 3946 (2002)
  [9]. L.X.Zhang,Y.Z.Wang,H.F.Jiu, Y.L.Wang, V.X. Sun,Z.Li, Electron Matter lett.10, 439(2014)
  [10]. Shao-Horn Y, Hackney SA, Johnson CS, Thackeray MM.J. Electrochem Soc 1998;145; 582-589
  [11]. Zoltowski P, Drazic DM,Vorkapic L, J Appl Electrochem 1993;3:271-283
  [12]. M.Senthilkumar, Balamurugan and B.G. Jeyaprakash ,Hydrothermal Synthesis of MnO2 Nanoparticles using Teflon Leined Autoclave, Research Journal of Pharmaceutical,Biological and Chemical Sciences, Vol.4 pp 1627-1632(2013)
  [13]. Harish Kumar, Manisha and Poonam Sangwan, “Synthesis and Characterization of MnO2 Nanoparticles using Co-Precipitation Technique. Vol.3, 3 (2013) pp155-160
  [14]. R. N. Iskenderov, I. A. Drabkin, T. L. Emel’yanova and Ya. Ksendzov, Fiz. Tverd. Tela 10, 2573 (1968). [Sov.Phys.–Solid State 10, 2031 (1969)].
  [15]. C. Franchini, V. Bayer, R. Podloucky, J. Paier, G. Kresse, Phys. Rev. B 72, 045132 [6 pages] (2005).
  

  Citation
  S.Ganeshan, P.Ramasundari, A.Elangovan, G.Arivazhagan, R.Vijayalakshmi, "Synthesis and Characterization of MnO2 Nanoparticles: Study of Structural and Optical Properties," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.6, pp.5-8, 2017

• Open Access   Article

  Optical and Electrical Properties of ZnO Nanorods at different Temperatures

  R.K. Das

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.6 , pp.9-12, Dec-2017

  CrossRef-DOI:   https://doi.org/10.26438/ijsrpas/v5i6.912

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  Abstract
  Here ZnO (Zinc Oxide) nanorods are synthesized by using hydrothermal process. ZnO nanorods were synthesized on annealed seeded layer by hydrothermal method at different temperatures 50°C, 65°C, 75°C, and 85°C. Optical and electrical properties were studied using Diffused Reflectance Spectra analyser (DRS) and current-voltage measurements are done on the prepared ZnO nanorods thin films. Diffused reflectance occurs when the incident radiation beam is focused on the sample at a particular temperature and the surface of the sample is rough or irregular so that a part of the incident beam is reflected which is considered to be diffuse reflection. Then the back reflected and diffusely scattered light is collected by the detector. The UV spectra analyser shows the absorption peaks appear at 366nm, 367nm, 366nm and 369nm while growth temperature increases from 50 ℃ to 85 ℃. Band Gap energy of the sample is also calculated at different temperatures. ZnO nanorods have huge applications in nanotechnology.

  Key-Words / Index Term
  ZnO, Nanorods, Optical, Electrical Properties, Diffusedr eflectance, QDSSC

  References
  [1] M.H. Huang, Y.Wu, H. Feick, N. Tran, E.Weber, P.Yang, “Catalytic growth of zinc oxide nanowires by vapour transport,” Advanced. Materials, vol.13, pp.113-116, 2001.
  [2] Y.C. Kong, D.P. Yu, B. Zhang,W. Fang, S.Q. Feng,“Ultraviolet-emitting ZnO nanowires synthesized by a physical vapour deposition approach,”, Applied Physics Letters, vol.78, pp.407-409, 2001
  [3] J.-J. Wu, S.-C. Liu, “Low-Temperature and Catalyst-Free Synthesis of Well-Aligned ZnO Nanorods on Si (100),”Advanced Materials, vol.14, pp.215-218, 2002.
  [4] G. Chandraprabha, T. Sankarappa, T. Sujatha, “Structure and magnetic studies of Cobalt Nanoparticles prepared by Modified Polyol Process”, International Journal of Scientific Research in Physics and Applied Sciences, vol.5, Issue 4, pp. 17-20, 2017.
  [5] C.X. Xu, A. Wei, X.W. Sun, Z.L. Dong, “Aligned ZnO nanorods synthesized by a simple hydrothermal reaction.”, Journal of Physics D :Applied Physics, Vol.39, pp. 1690-1693, 2006.
  [6] J. Song, S. Baek, S. Lim, “Effect of hydrothermal reaction conditions on the optical properties of ZnO nanorods”, Physics.B: Condensed Matter, Vol. 403 ,pp.1960-1963, 2008.
  [7] L. Vayssieres, K. Keis, S. Lindquist, A. Hagfedt, “Hydrothermal Synthesis and Properties of Diluted Magnetic Semiconductor Zn 1- xMn x O Nanowires”, Journal of Physical Chemistry B, Vol. 105, pp.3350-3352, 2001.
  [8] B. Liu, C.H. Zeng, “Hydrothermal Synthesis of ZnO Nanorods in the Diameter Regime of 50 nm”, Journal of American Chemical Society, Vol. 125, pp. 4430-4431, 2003.
  [9] Z. Qiu, K.S. Wong, M. Wu, W. Lin, H. Xu, “Microcavity lasing behaviour of oriented hexagonal ZnO nanowhiskers grown by hydrothermal oxidation”, Applied Physics Letters, Vol.84, pp.2739-2741, 2004.
  [10] R.K. Das, “Preparation of ZnO Nanorods by Hydrothermal Process at Different Temperatures”, International Journal of Scientific Research in Physics and Applied Sciences, vol.5, Issue 5, pp. 12-15, 2017.
  [11] J.-J. Wu, S.-C. Liu, “Catalyst-Free Growth and Characterization of ZnO Nanorods,”,Journal of Physical Chemitry B, Vol.106, pp.9546-9551, 2002.
  [12] J. Zhang, L. Sun, H. Pan, C. Liao, C. Yan, “ZnO nanowires fabricated by a convenient route”, New Journal of Chemistry, Vol.26, pp.33-34, 2002.
  [13] Y. Li, G.W. Meng, L.D. Zhang, F. Phillipp, “Ordered semiconductor ZnO nanowire. Arrays and their photo luminescence properties”, Applied Physics Letters, Vol.76, pp.2011-2014, 2000.
  

  Citation
  R.K. Das, "Optical and Electrical Properties of ZnO Nanorods at different Temperatures," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.6, pp.9-12, 2017