Optical and structural characterization of oleic acid-stabilized CdTe nanocrystals for solution thin film processing

Gutiérrez Lazos, Claudio Davet y Ortega López, Mauricio y Pérez Guzmán, Manuel A. y Espinoza Rivas, A. Mauricio y Solís Pomar, Francisco y Ortega Amaya, Rebeca y Silva Vidaurri, L. Gerardo y Castro Peña, Virginia Carolina y Pérez Tijerina, Eduardo (2014) Optical and structural characterization of oleic acid-stabilized CdTe nanocrystals for solution thin film processing. Beilstein Journal of Nanotechnology, 5. pp. 881-886. ISSN 2190-4286

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URL o página oficial: http://doi.org/10.3762/bjnano.5.100

Resumen

This work presents results of the optical and structural characterization of oleic acid-stabilized cadmium telluride nanocrystals (CdTe-NC) synthesized by an organometallic route. After being cleaned, the CdTe-NC were dispersed in toluene to obtain an inklike dispersion, which was drop-cast on glass substrate to deposit a thin film. The CdTe-NC colloidal dispersion as well as the CdTe drop-cast thin films were characterized with regard to the optical and structural properties. TEM analysis indicates that the CdTeNC have a nearly spherical shape (3.5 nm as mean size). Electron diffraction and XRD diffraction analyses indicated the bulk-CdTe face-centered cubic structure for CdTe-NC. An additional diffraction line corresponding to the octahedral Cd3P2 was also detected as a secondary phase, which probably originates by reacting free cadmium ions with trioctylphosphine (the tellurium reducing agent). The Raman spectrum exhibits two broad bands centered at 141.6 and 162.3 cm−1, which could be associated to the TO and LO modes of cubic CdTe nanocrystals, respectively. Additional peaks located in the 222 to 324 cm−1 range, agree fairly well with the wavenumbers reported for TO modes of octahedral Cd3P2.

Tipo de elemento: Article
Palabras claves no controlados: Cadmium telluride; Raman spectroscopy; Semiconductor Nanocrystals; Transmission electron microscopy; X-ray diffraction
Materias: T Tecnología > T Tecnología en General
Divisiones: Ciencias Físico Matemáticas
Usuario depositante: Lic. Jesús E. Alvarado
Creadores:
CreadorEmailORCID
Gutiérrez Lazos, Claudio DavetNO ESPECIFICADONO ESPECIFICADO
Ortega López, MauricioNO ESPECIFICADONO ESPECIFICADO
Pérez Guzmán, Manuel A.NO ESPECIFICADONO ESPECIFICADO
Espinoza Rivas, A. MauricioNO ESPECIFICADONO ESPECIFICADO
Solís Pomar, FranciscoNO ESPECIFICADONO ESPECIFICADO
Ortega Amaya, RebecaNO ESPECIFICADONO ESPECIFICADO
Silva Vidaurri, L. GerardoNO ESPECIFICADONO ESPECIFICADO
Castro Peña, Virginia CarolinaNO ESPECIFICADONO ESPECIFICADO
Pérez Tijerina, Eduardoeduardo.pereztj@uanl.edu.mxNO ESPECIFICADO
Fecha del depósito: 13 Mar 2019 23:11
Última modificación: 13 Mar 2019 23:11
URI: http://eprints.uanl.mx/id/eprint/15227

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