Optical properties of gold nanoparticles on heavily-doped Si substrate synthesized with an electrochemical process

S. Zhu, T. P. Chen, Z. Liu, Y. C. Liu, Y. Liu, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

Gold nanoparticles on a heavily-doped Si substrate were synthesized through direct electroreduction of bulk AuCl4- ions. The optical properties of the nanoparticles were determined from ellipsometric analysis. The Lorentz-Drude model was used to represent the effective dielectric function of the gold nanoparticles. A prominent peak at ∼ 1.7 eV is identified in the imaginary part 2, which is attributed to the surface plasmon resonance. There are also two minor peaks located at ∼ 3.1 and ∼ 4.2 eV, respectively, which are related to the interband transitions. The interband transitions are greatly suppressed, which could be due to the modified lattice structures of the nanoparticles.
Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number6
DOIs
Publication statusPublished - 4 May 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

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