Vibrational properties of sp carbon atomic wires in cluster-assembled carbon films

Authors

  • Giovanni Onida,

    Corresponding author
    1. Dipartimento di Fisica dell'Università degli Studi di Milano and ETSF, via Celoria 16, 20133 Milano, Italy
    • Phone: +39 02 50317407, Fax: +39 02 50317482
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  • Nicola Manini,

    1. Dipartimento di Fisica dell'Università degli Studi di Milano and ETSF, via Celoria 16, 20133 Milano, Italy
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  • Luca Ravagnan,

    1. Dipartimento di Fisica dell'Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
    2. CIMAINA, Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
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  • Eugenio Cinquanta,

    1. Dipartimento di Fisica dell'Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
    2. Dipartimento di Scienza dei Materiali, Università di Milano Bicocca, via Cozzi 53, 20125 Milano, Italy
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  • Davide Sangalli,

    1. Dipartimento di Fisica dell'Università degli Studi di Milano and ETSF, via Celoria 16, 20133 Milano, Italy
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  • Paolo Milani

    1. Dipartimento di Fisica dell'Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
    2. CIMAINA, Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
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Abstract

Linear chains made by a single row of sp-hybridized carbon are predicted to display fascinating mechano-electronic properties connected with their termination and stabilization inside realistic carbon structures. The present work describes how the computed vibrational properties of cumulenic and polyynic carbon chains allow one to interpret the carbynic features observed in Raman spectra of cluster-assembled sp–sp2 films. The overall picture is consistent with the measured decay of the components induced by air or oxygen exposure.

original image

The electronic properties of carbon atomic chains attached to the edges of graphitic fragments can be controlled by a relative twist of the terminating planes.

Ancillary