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CdS Nanoparticles in Gel Film Network: Synthesis, Stability and Optical Properties

  • Arup K. Atta
  • Prasanta K. Biswas
  • Dibyendu Ganguli

Abstract

Development of quantum (Q) size metal and semiconductor nanoparticles1–3 in various kinds of hosts and their optical and opto-electronic characterization have become an important area of research in recent times. The importance of this activity is derived from the possibility of application of such materials in photonics. Sol-gel processing has proved to be a very useful method for generating these new composites, and a large number of papers have been published 4–6 in the last few years. Much of this work deals with generation of sulphide semiconductor nanoparticles in monolithic silica or silicate bodies. In general the basic optical properties of such materials are characterized by an excitonic HOMO-LUMO transition at around 400–460 nm and a fluorescence band around 460 nm, both at 298 K. The transition depends on the size of the microcrystals confined in a suitable host. At the lowest excitonic state 7 the CdS particles should exhibit an absorption shoulder in the UV range (270 – 300 nm). This has also been observed experimentally.8–10

Keywords

Soda Lime Glass Excitonic Band Defect Band Monolithic Silica Bake Film 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    R.K. Jain and R.C. Lind, Degenerate four-wave mixing in semiconductor-doped glasses, J. Opt. Soc. Am. 73:647 (1983).CrossRefGoogle Scholar
  2. 2.
    A Anon., Techno Japan, 26: 63(1993).Google Scholar
  3. 3.
    B.J. Potter and J.H. Simmons, Quantum confinement effects in CdTe-glass composite films produced using r.f. magnetron sputtering, J. Appl. Phys. 68:1218 (1990).CrossRefGoogle Scholar
  4. 4.
    M. Nogami and A. Nakamura, Emission spectra of CdS doped in sol-gel derived glasses, Phys. Chem. Glasses, 34:109(1993).Google Scholar
  5. 5.
    H. Nasu and J.D. Mackenzie, Non-linear optical properties of glasses and glasses-or gel-based composites, Opt. Engg. 26:102(1987).CrossRefGoogle Scholar
  6. 6.
    T. Hasimoto, T. Yoko and S. Sakka, Third-order non-linear optical susceptibility of-Fe2O3 thin film prepared by the sol-gel method, J. Ceram. Soc. Jpn. 101:64(1993).CrossRefGoogle Scholar
  7. 7.
    L.E. Brus, Electron-electron and electron-hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state, J. Chem. Phys. 80:4403(1984).CrossRefGoogle Scholar
  8. 8.
    A. Henglein, Small-particle research: Physicochemical properties of extremely small colloidal metal and semiconductor particles, Chem. Rev. 89: 1861(1989).CrossRefGoogle Scholar
  9. 9.
    L. Spanhel, E. Arpac and H. Schmidt, Semiconductor clusters in the sol-gel CdS nanocomposites, J. Non-cryst. Solids, 147 & 148:657(1992).CrossRefGoogle Scholar
  10. 10.
    C.T. Dameron, R.N. Reese, R.K. Mehra, A.R. Kortan, P.J. Carroll, M.L. Steigerwald, L.E. Brus and D.R. Winge, Biosynthesis of cadmium sulphide quantum semiconductor crystallites, Nature, 338: 596(1989).CrossRefGoogle Scholar
  11. 11.
    A.K. Atta, P.K. Biswas and D. Ganguli, Optical properties of CdS and (Cd, Zn)S doped sol-gel titania films, Mat. Lett. 15: 99–103(1993).CrossRefGoogle Scholar
  12. 12.
    K. Osakada, A. Taniguchi, E. Kubota, S. Dev, K. Tanaka, K. Kubota and T. Yamamoto, New organosols of Cu2S, CdS, ZnS, HgS, NiS and mixed metal sulfides in n-n-dimethyl formamide and dimethyl sulfoxide, preparation, characterisation and physical properties, Chem. Mat. 4: 562(1992).CrossRefGoogle Scholar
  13. 13.
    L. Spanhel, M. Haase, H. Weiler and A. Henglein, Photochemistry of colloidal semiconductors. 20. Surface modification and stability of strong luminescing CdS particles, J. Am. Chem. Soc. 109: 5649(1987).CrossRefGoogle Scholar
  14. 14.
    Y. Fainman, J. Ma and S.H. Lee, Non-linear optical materials and applications, Mat Sc. Reports, 9: 53(1993).CrossRefGoogle Scholar
  15. 15.
    A.I. Ekimov, I.A. Kudryavtsev, M.G. Ivanov and A.L. Efros, Spectra and Decay kinetics of radiative recombination in CdS microcrystals, J. Lumin., 46: 83(1990).CrossRefGoogle Scholar
  16. 16.
    J. Kuczynski and J.K. Thomas, Surface effects in the photochemistry of colloidal cadmium sulfide, J. Phys. Chem. 87: 5498(1983).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Arup K. Atta
    • 1
  • Prasanta K. Biswas
    • 1
  • Dibyendu Ganguli
    • 1
  1. 1.Sol-Gel LaboratoryCentral Glass and Ceramic Research InstituteCalcuttaIndia

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