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On the solid state of bone.

J Behari, D V Rai, R Jha

    Calcified Tissue International
    |August 24, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Bone and its components, collagen and apatite, exhibit a photovoltaic effect under visible and infrared light. This effect diminishes after ultraviolet light exposure, suggesting protonic conduction is responsible.

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    Area of Science:

    • Biophysics
    • Materials Science

    Background:

    • The photovoltaic effect is a fundamental phenomenon in semiconductor materials.
    • Bone, a complex biological composite, has not been extensively studied for its photovoltaic properties.

    Purpose of the Study:

    • To investigate the presence and characteristics of the photovoltaic effect in bone and its primary constituents.
    • To explore the underlying mechanisms responsible for observed photovoltaic responses.

    Main Methods:

    • Observation of photovoltage in bone, collagen, and apatite under infrared and visible light at room temperature.
    • Measurement of current-voltage (I-V) relationships to determine charge carrier mobility.
    • Assessment of injected carrier lifetime and the impact of ultraviolet light exposure.

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    Main Results:

    • Photovoltaic effects were detected in bone, collagen, and apatite.
    • Ultraviolet light exposure led to a reduction in photovoltage magnitude across all samples.
    • Drift mobility and carrier lifetime were quantified, supporting a specific conduction mechanism.

    Conclusions:

    • The observed photovoltaic effects in bone and its components are likely attributable to protonic conduction.
    • These findings open new avenues for understanding bone's electrical properties and potential applications.