Synthesis and characterization of a plasmonic-semiconductor composite containing rationally designed, optically tunable gold nanorod dimers and anatase TiO2

Bryan F. Mangelson, Matthew R. Jones, Daniel J. Park, Chad M. Shade, George C. Schatz, Chad A. Mirkin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Herein we utilize on-wire lithography (OWL) to synthesize a composite plasmonic-semiconductor material composed of Au nanorod dimers embedded within anatase TiO2 sheets. We demonstrate that, despite the harsh conditions necessary to synthesize crystalline TiO2, the gapped nanostructures remain intact. Additionally, we show that the optical properties of these structures can be tailored via the geometric control afforded by the OWL process to produce structures with various gap sizes exhibiting different electric field intensities near the surface of the metal particles and that those fields penetrate into the semiconductor material. Finally, we show that this composite amplifies the electric field of incident light on it by a factor of 103, which is more that 750 times greater than the isotropic materials typically used for these systems.

Original languageEnglish
Pages (from-to)3818-3824
Number of pages7
JournalChemistry of Materials
Volume26
Issue number12
DOIs
Publication statusPublished - Jun 24 2014

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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