Paper Titles

Phases in Austenitic Cast Steel
p.215

Numerical Modeling of Two Phase Flow under Centrifugation
p.221

Thermal Properties of CuGa₂ Phase in Inert Atmosphere
p.227

Temperature Dependence of Elastic Properties of Aluminum Foam Structures
p.233

Synthesis of ZnS/SiO₂ Core-Shell by Sol-Gel Process and Covering then with Gold Nanoparticle and Study of its Photoluminescence Properties
p.238

Silicon Carbide Solid-Phase Epitaxy on a Microporous Substratum
p.243

The Thermal Diffusivity of Mg-Al-Sr and Mg-Al-Ca-Sr Sand Casting Magnesium Alloys
p.249

The Corrosion Resistance of the Mg-Al-Ca-Sr Sand Casting Magnesium Alloys
p.255

Determination of Pressure-Saturation-Permeability Relations by Centrifugation
p.261

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 326-328Synthesis of ZnS/SiO2 Core-Shell by Sol-Gel...

Synthesis of ZnS/SiO₂ Core-Shell by Sol-Gel Process and Covering then with Gold Nanoparticle and Study of its Photoluminescence Properties

Article Preview

Abstract:

Semiconductors have been suggested as ideal candidates for many electrical and optical applications and several groups have reported their successful synthesis in recent years. In particular, ZnS that is a direct wide band gap (3.91 eV) semiconductor and an important phosphor host lattice material, can be used in electroluminescent devices (ELD), due to its large band gap, which enables emission of visible light without absorption and efficient electron transport. In this work, we report synthesis and structural characteristics of gold covered core-shell nanometer size of ZnS/SiO₂ thin films as a patterning materials for use as a protective layer in optical phase change discs prepared through a simple sol-gel process. The results obtained by transmission electron microscopy (TEM) images showed that, as prepared core-shell materials were well-aligned nanoprticles grew in the same direction and through X-ray diffraction (XRD) analysis, we found that ZnS/SiO₂ core shell material was composed of crystalline ZnS core covered by an amorphous SiO₂ shell. Photoluminescence (PL) measurements performed on core-shell samples before and after gold coverig samples have provided information regarding stoichiometric vacancies or interstitial impurities and enhenced intensity of the green emission of ZnS nanowires at room temperature due to sheelding with SiO₂.

You might also be interested in these eBooks

Diffusion in Solids and Liquids VII

Info:

Periodical:

Defect and Diffusion Forum (Volumes 326-328)

Pages:

238-242

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.326-328.238

Citation:

Cite this paper

Online since:

April 2012

Authors:

Mirabdullah Seyed Sadjadi, Nazanin Farhadyar, K. Zare

Keywords:

Core-Shell ZnS/SiO₂, Gold Covering, Photoluminescence (PL), Sol-Gel (SG)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] N. Chestnoy, R. Hull, L. E Brus: J. Chem. Phys. Vol. 85 (1996), p.2237.

[2] C. -S. Hwang, Cho IH: Bull. Korean Chem. Soc. Vol. 26 (2005), p.1776.

[3] L.E. Brus: J. Chem. Phys. Vol. 80 (1984), p.4403.

[4] Y. Wang, N. Herron: J. Phys. Chem. Vol. 91 (1987), p.257.

[5] D.D. Awschalom, J.M. Kikkawa: Phys. Today Vol. 52 (1999), p.33.

[6] X. Wang, Y. Ding, C.J. Summers, Z.L. Wang: J. Phys. Chem. B Vol. 108 (2004), p.8773.

[7] A. Narayanaswamy, H.F. Xu, N. Pradhan, M. Kim, X. Peng: J. Am. Chem. Soc. Vol. 128 (2006), p.10310.

[8] A.A. Khosravi, M. Kundu, L. Jatwa, S.K. Deshpande, U.A. Bhagwat, M. Sastry, S.K. Kulkarni: Appl. Phys. Lett. Vol. 67 (1995), p.2702.

DOI: 10.1063/1.114298

[9] Y. Li. G.W. Meng, L.D. Zhang, F. Phillipp: Appl. Phys. Lett. Vol. 76 (2000), p. (2011).

[10] Y.S. Zhang, L.S. Wang, X.H. Liu, Y.J. Yan, C.Q. Chen, J. Zhu: J. Phys. Chem. B Vol. 109 (2005), p.13091.

[11] E.J. Ibanga, C. Le Luyer, J. Mugnier: Matter. Chem. Phys. Vol. 80 (2003), p.490.

[12] J. Archana, M. Navaneethan, S. Ponnusamy, Y. Hayakawa, C. Muthamizhchelvan: Mat. Lett. Vol. 63 (2009), p. (1931).

[13] R. John, S. Sasi Florence: Chalcogenide Lett. Vol. 6 (2009), p.535.

[14] JCPDS card no. 80-0007.

[15] B.D. Cullity: Elements of X-ray Diffraction, second ed., Addison-Wesley Company, USA, p.102.

[16] S. Venkatachalam, R.T. Rajendrakumar, D. Mangalaraj, Sa.K. Narayandass, K. Kim, J. Yi: Solid State Electron Vol. 48 (2004), p.2219.

[17] N. Goswami, P. Sen: Solid State Comm. Vol. 132 (2004), p.791.

[18] M. Wang, L. Sun, X. Fu, C. Liao, C. Yan: Solid State Comm. Vol. 493 (2000), p.115.

[19] H. Miura, N. Iwata, N. Toyoshima, Y. Hayashi, K. Takeuchi, T. Mori, I. Hirosawa: Optical Data Storage Topical Meeting, Montreal, Que, 129 (2006).

DOI: 10.1109/ods.2006.1632741

[20] R. Thielsch, T. Böhme, H. Böttcher: Physica Status Solidi (a) Vol. 155 (1996), p.157.

[21] JCPDS card no. 80-0007.

[22] B.D. Cullity: Elements of X-ray Diffraction, second ed., Addison-Wesley Company, USA, p.102.

[23] R. John, S.S. Florence: Chalcogenide Letters Vol. 7 (2010), p.269.

[24] B. Geng, J. Ma, F. Zhan: Mat. Chem. Phy. Vol. 534 (2009), p.113.

[24] M. Nell, J. Marohn, G. Mclendon: J. Chem. Phys. Vol. 4359 (1990), p.94.

[25] L. Spanhel, M. Haase, H. Weller, A. Henglein: J. Am. Chem. Soc. Vol. 5649 (1987), p.109.

[26] M.A.S. Sadjadi, B. Sadeghi, M. Meskinfam, K. Zare, J. Azizian: Physica E Vol. 40 (2008), p.3183.