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Electronic excitations in condensed biological matter.

J Bednár

    International Journal of Radiation Biology and Related Studies in Physics, Chemistry, and Medicine
    |August 1, 1985
    PubMed
    Summary

    Collective electronic excitations in biological matter manifest as plasmons, excitons, or solitons. These quasi-particles can transfer energy, charge, and biological information, with potential photobiological and radiation biology implications.

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    Area of Science:

    • Physics and Biology
    • Quantum Mechanics
    • Biophysics

    Background:

    • Electronic excitations in living matter can exhibit collective behavior.
    • Understanding these collective phenomena is key to comprehending energy and information transfer in biological systems.

    Purpose of the Study:

    • To review collective electronic excitations in simple physical terms.
    • To explore the nature and implications of plasmons, excitons, and solitons in biological contexts.

    Main Methods:

    • Conceptual review of collective electronic excitations.
    • Physical interpretation of plasmons, excitons, and solitons.
    • Discussion of their roles in biological structures.

    Main Results:

    • Collective excitations appear as plasmons (delocalized electron oscillations) or excitons (moving quantum quasi-particles) in liquids and solids.
    • In soft biological structures, they manifest as solitons (massive quasi-particles with quantum-classical character).
    • Solitons can stably transfer energy, charge, mass, and biological information along macromolecules, fibres, membranes, and surfaces.

    Conclusions:

    • Collective electronic excitations, including plasmons, excitons, and solitons, play a significant role in biological systems.
    • Solitons are particularly important for information and energy transfer in biological structures.
    • These phenomena may have implications for photobiology and radiation biology.

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