Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (01): 251-256.doi: 10.3866/PKU.WHXB201228251


Growth Mechanism and Morphology of ZnO/eosin-Y Hybrid Thin Films

MARÍ Bernabé1, SINGH Krishan-Chander2, MOLLAR Miguel1, MOYA Mónica2   

  1. 1. Departament de Física Aplicada- IDF, Universitat Politècnica de València, Camí de Vera s/n, 46022, València, Spain;
    2. Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India
  • Received:2011-08-08 Revised:2011-11-05 Published:2011-12-29
  • Contact: MARÍ Bernabé
  • Supported by:

    The project was supported by the Spanish Government through MCINN Grant (MAT2009-14625-C03-03) and MEC Financial Fund (SAB2010-0019) for Singh, K. C.

Abstract: Thin hybrid films of ZnO/eosin-Y were prepared by electrodeposition at -0.8 and -0.9 V in aqueous and non-aqueous baths at temperatures ranging from 40 to 90 °C with dye concentrations of 100 and 400 μmol·L-1. The films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), and absorption spectroscopy. The films prepared in a non-aqueous bath were non-porous and did not adsorb dye molecules on their surface. However, the films grown in aqueous media were porous in nature and adsorbed dye during the deposition of ZnO. Preferential growth of the film along the (002) face was observed, and the highest crystallinity was achieved when the film was deposited at 60 °C. The maximum absorption was achieved for the films grown at 60 to 70 °C, a deposition potential of -0.9 V, and a dye concentration of 100 μmol·L-1.

Key words: Electrodeposition, ZnO/eosin-Y, Thin crystalline hybrid film, Hybrid film, Porous film, Growth mechanism