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

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1 Citation (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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    Swain, D. K., Narzary, A., Singh, A. K., Chandra, A., Nagasawa, T., Yamamoto, S., Mitsuishi, M., & Rath, S. (2017). Observation of self-polarization in BSA protected Au20 clusters. Nanotechnology, 28(44), [445704]. https://doi.org/10.1088/1361-6528/aa8718