10.1007/s40089-017-0212-4

Spectroscopic properties of triangular silver nanoplates immobilized on polyelectrolyte multilayer-modified glass substrates

  1. Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima University, Kagoshima, 890-0065, JP
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Published in Issue 2017-07-15

How to Cite

Rabor, J. B., Kawamura, K., Muko, D., Kurawaki, J., & Niidome, Y. (2017). Spectroscopic properties of triangular silver nanoplates immobilized on polyelectrolyte multilayer-modified glass substrates. International Nano Letters, 7(3 (September 2017). https://doi.org/10.1007/s40089-017-0212-4

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Abstract

Abstract Fabrication of surface-immobilized silver nanostructures with reproducible plasmonic properties by dip-coating technique is difficult due to shape alteration. To address this challenge, we used a polyelectrolyte multilayer to promote immobilization of as-received triangular silver nanoplates (TSNP) on a glass substrate through electrostatic interaction. The substrate-immobilized TSNP were characterized by absorption spectrophotometry and scanning electron microscopy. The bandwidth and peak position of localized surface plasmon resonance (LSPR) bands can be tuned by simply varying the concentration of the colloidal solution and immersion time. TSNP immobilized from a higher concentration of colloidal solution with longer immersion time produced broadened LSPR bands in the near-IR region, while a lower concentration with shorter immersion time produced narrower bands in the visible region. The shape of the nanoplates was retained even at long immersion time. Analysis of peak positions and bandwidths also revealed the point at which the main species of the immobilization had been changed from isolates to aggregates.

Keywords

  • Triangular silver nanoplates,
  • Surface-immobilized nanoplates,
  • LSPR

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