Electrical and optical properties of (PPh4)(2)[Fe(CN)(5)NO] non-crystalline thin films prepared with the vacuum thermal evaporation technique
Por:
Sánchez-Vergara M.E., González-Aranzábal S.A., Sauceda-Arriaga M.A., Ortiz A., Alvarez J.R., García-Montalvo V.
Publicada:
15 feb 2010
Resumen:
Molecular-material thin films of (PPh4)(2)[Fe(CN)(5)NO] and a double potassium salt from 1,8-dihydroxyanthraquinone have been prepared by vacuum thermal evaporation on Corning glass substrates and crystalline silicon wafers. The surface morphology, thickness and structure of the deposited films were studied by scanning electron microscopy (SEM), atomic force microscopy (AFM), ellipsometric measurements, ultraviolet-visible (UV-vis) and Fourier-transform infrared (FT-IR) spectroscopies. The amorphous films show the same intra-molecular bonds as the IR spectroscopic studies, which suggests that the thermal evaporation process did not alter the initial chemical structures. The conductivity and the electrical-conduction mechanism in the thin films were also investigated. Finally, the optical band gap (E-g) of these molecular complexes was evaluated from optical absorption measurements. (C) 2009 Elsevier B.V. All rights reserved.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico
Coordinación de Ingeniería Mecatrónica, Facultad de Ingeniería, Universidad Anáhuac México Norte, Ave. Universidad Anahuac 46, Col. Lomas Anahuac, 52786 Huixquilucan, Estado de Mexico, Mexico
Instituto Tecnológico y de Estudios Superiores de Monterrey, Calle del Puente 222, Col. Ejidos de Huipulco, 14380 Mexico, D.F., Mexico
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