The effect of laser excitation on the Raman microspectroscopy of nanoindentation-induced silicon phase transformation

Denise Mahon, P Mahon, Dudley Creagh

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    It is well established that silicon undergoes a series of phase transformations when subjected to the pressure of nanoindentation. Phase transformations in silicon are studied using diamond anvil apparatus. The effect of the high pressure is an increase in density in diamond-cubic Si-I and as a result an unstable metallic phase of silicon (Si-II) is formed. This rapidly transforms to other phases upon pressure release. Depending on the rate of pressure release, rhombohedral (r8) Si-XII, body-centered-cubic (bc8) Si-III and/or the amorphous phase (a-Si) can occur. Raman spectroscopy is particularly useful for the characterization of the many different phases of the transformed silicon. A comparison of Raman spectra obtained with different laser wavelength excitations has been undertaken to examine whether source dependent effects occur during the characterization of the silicon phases. Preliminary results are presented here
    Original languageEnglish
    Pages (from-to)430-434
    Number of pages5
    JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
    Volume580
    Issue number1
    DOIs
    Publication statusPublished - 2007

    Fingerprint

    Laser excitation
    Nanoindentation
    nanoindentation
    phase transformations
    Phase transitions
    Silicon
    silicon
    excitation
    lasers
    Diamonds
    diamonds
    anvils
    Raman spectroscopy
    Raman scattering
    Raman spectra
    Wavelength
    Lasers
    wavelengths

    Cite this

    @article{62fc3efb05b2401db96cc566d3a03ebf,
    title = "The effect of laser excitation on the Raman microspectroscopy of nanoindentation-induced silicon phase transformation",
    abstract = "It is well established that silicon undergoes a series of phase transformations when subjected to the pressure of nanoindentation. Phase transformations in silicon are studied using diamond anvil apparatus. The effect of the high pressure is an increase in density in diamond-cubic Si-I and as a result an unstable metallic phase of silicon (Si-II) is formed. This rapidly transforms to other phases upon pressure release. Depending on the rate of pressure release, rhombohedral (r8) Si-XII, body-centered-cubic (bc8) Si-III and/or the amorphous phase (a-Si) can occur. Raman spectroscopy is particularly useful for the characterization of the many different phases of the transformed silicon. A comparison of Raman spectra obtained with different laser wavelength excitations has been undertaken to examine whether source dependent effects occur during the characterization of the silicon phases. Preliminary results are presented here",
    author = "Denise Mahon and P Mahon and Dudley Creagh",
    year = "2007",
    doi = "10.1016/j.nima.2007.05.071",
    language = "English",
    volume = "580",
    pages = "430--434",
    journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
    issn = "0168-9002",
    publisher = "Elsevier",
    number = "1",

    }

    TY - JOUR

    T1 - The effect of laser excitation on the Raman microspectroscopy of nanoindentation-induced silicon phase transformation

    AU - Mahon, Denise

    AU - Mahon, P

    AU - Creagh, Dudley

    PY - 2007

    Y1 - 2007

    N2 - It is well established that silicon undergoes a series of phase transformations when subjected to the pressure of nanoindentation. Phase transformations in silicon are studied using diamond anvil apparatus. The effect of the high pressure is an increase in density in diamond-cubic Si-I and as a result an unstable metallic phase of silicon (Si-II) is formed. This rapidly transforms to other phases upon pressure release. Depending on the rate of pressure release, rhombohedral (r8) Si-XII, body-centered-cubic (bc8) Si-III and/or the amorphous phase (a-Si) can occur. Raman spectroscopy is particularly useful for the characterization of the many different phases of the transformed silicon. A comparison of Raman spectra obtained with different laser wavelength excitations has been undertaken to examine whether source dependent effects occur during the characterization of the silicon phases. Preliminary results are presented here

    AB - It is well established that silicon undergoes a series of phase transformations when subjected to the pressure of nanoindentation. Phase transformations in silicon are studied using diamond anvil apparatus. The effect of the high pressure is an increase in density in diamond-cubic Si-I and as a result an unstable metallic phase of silicon (Si-II) is formed. This rapidly transforms to other phases upon pressure release. Depending on the rate of pressure release, rhombohedral (r8) Si-XII, body-centered-cubic (bc8) Si-III and/or the amorphous phase (a-Si) can occur. Raman spectroscopy is particularly useful for the characterization of the many different phases of the transformed silicon. A comparison of Raman spectra obtained with different laser wavelength excitations has been undertaken to examine whether source dependent effects occur during the characterization of the silicon phases. Preliminary results are presented here

    U2 - 10.1016/j.nima.2007.05.071

    DO - 10.1016/j.nima.2007.05.071

    M3 - Article

    VL - 580

    SP - 430

    EP - 434

    JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    SN - 0168-9002

    IS - 1

    ER -