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CdS semiconductor nanoparticles in silica sonogel matrices

Code: F12

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Abstract

SiO2 gels obtained by sonocatalytic method combined with DCCA were used as host-matrices for extremely fine dispersions of CdS semiconductor particles. Small crystallites were produced “in situ” by H2S gas diffusion method. The particles were characterized by TEM and HRTEM, EXAFS, UV-Vis and Raman spectroscopies. The size of crystallites ranged from 5 to 10 nm. The optical transmission spectra showed the characteristic blue shift as a function of the particles size, as predicted by the theory. The optical and mechanical qualities of the samples were substantially improved by an infiltration method using a sono-sol which sealed the superficial pores thus ensuring greater longevity and the possibility of obtaining transparent gels by polishing.

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Authors and Affiliations

  1. Dpto. Estructura y Propiedades de los Materiales, Universidad de Cádiz, Apdo 40, 11510, Puerto Real (Cádiz), Spain

    M. Piñero, R. Litrán, C. Fernández-Lorenzo, E. Blanco, M. Ramírez-Del-Solar, N. De La Rosa-Fox & L. Esquivias

  2. Laboratorio Nacional de Luz Sincrotron/CNPq, CP. 6192-13081, Campinas, Sao Paulo, Brazil

    A. Craievich

  3. Laboratory of Science of Vitreous Materials (LA 1119)-C.069, University of Montpellier II, 34095, Montepellier, France

    J. Zarzycki

Authors
  1. M. Piñero
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  2. R. Litrán
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  3. C. Fernández-Lorenzo
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  4. E. Blanco
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  5. M. Ramírez-Del-Solar
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  6. N. De La Rosa-Fox
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  7. L. Esquivias
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  8. A. Craievich
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  9. J. Zarzycki
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Piñero, M., Litrán, R., Fernández-Lorenzo, C. et al. CdS semiconductor nanoparticles in silica sonogel matrices. J Sol-Gel Sci Technol 2, 689–694 (1994). https://doi.org/10.1007/BF00486333

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  • DOI: https://doi.org/10.1007/BF00486333

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