Observation of self-polarization in BSA protected Au20 clusters

D. K. Swain, A. Narzary, A. K. Singh, A. Chandra, T. Nagasawa, S. Yamamoto, M. Mitsuishi, S. Rath

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    Bovine serum albumin (BSA)-protected gold clusters (atomicity ∼ 20), prepared using a wet chemical route, show strong dipolar radiative transition with a gap energy of 1.93 eV due to the high oscillator strength, as confirmed by the emission studies. Self-arrangement of the clusters with fixed atomicity yields a low dispersive dielectric and electric self-polarization nature. The electrical hysteresis loop measurements returned a remanent polarization of 0.05 μC cm-2, which can be correlated with the dipolar orientation (activation energy ∼ 45.32 meV), originating from the structure-dependent deformation of the charge density.

    Original languageEnglish
    Article number445704
    Issue number44
    Publication statusPublished - 2017 Oct 5


    • dielectric properties
    • electric polarization
    • gold cluster
    • optical properties

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering
    • Electrical and Electronic Engineering


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