Phonons in polyacenic chains

O. Rafil, M. Tamine, B. Bourahla, R. Tigrine, S. Amoudache, A. Khater

    Research output: Contribution to journalArticle

    Abstract

    We have theoretically resolved phonon excitations in quasi-two-dimensional organic crystals of polyacenic semiconductor material which may be obtained by the pyrolytic treatment of phenol-formaldehyde resin. A model for studying the dynamical properties using three polyacene chains is proposed with the aim to present the vibrational properties of this structure. It employs the formalism of solid states in two dimensions which admit phonons. A simulation process of the two-dimensional lattice structure shows that elastic waves may explain the existence of vibrational modes in the frequency range 100-400 cm-1. The presence of acoustic and optical like phonons is discussed in terms of the elastic force constants. A hyperfine resonance structure is obtained. It allows the analysis of the dynamical evolution in thin films of polyacene. It is found that the behavior of the phonon density of states exhibits resonance between modes in the structure.

    Original languageEnglish
    Pages (from-to)229-236
    Number of pages8
    JournalChinese Journal of Polymer Science (English Edition)
    Volume24
    Issue number3
    DOIs
    Publication statusPublished - 1 May 2006

      Fingerprint

    Keywords

    • Elastic waves
    • Localized modes
    • Polymers
    • Surface phonons

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Organic Chemistry
    • Polymers and Plastics

    Cite this

    Rafil, O., Tamine, M., Bourahla, B., Tigrine, R., Amoudache, S., & Khater, A. (2006). Phonons in polyacenic chains. Chinese Journal of Polymer Science (English Edition), 24(3), 229-236. https://doi.org/10.1142/S0256767906001242