Near-infrared luminescence from small gold nanocrystals

T. P. Bigioni, R. L. Whetten, Ö Dag

Research output: Contribution to journalArticlepeer-review

271 Scopus citations

Abstract

A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1-1.6 μm). Near-infrared photoluminescence spectra were measured at room temperature for 1.1 and 1.7 nm Au nanocrystals using a 1.06 μm excitation source. This photoluminescence is attributed to sp to sp-like transitions, analogous to intraband transitions in bulk gold; however, the exact mechanism is unknown. A conservative estimate for the quantum yield for the 1.7 nm gold nanocrystals is (4.4 ± 1.5) × 10-5 at room temperature, more than 5 orders of magnitude greater than that of bulk gold.

Original languageEnglish (US)
Pages (from-to)6983-6986
Number of pages4
JournalJournal of Physical Chemistry B
Volume104
Issue number30
DOIs
StatePublished - Aug 3 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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