Screening and enrichment of metal nanoparticles with novel optical properties

Steven R. Emory, Shuming Nie

Research output: Contribution to journalArticlepeer-review


A rapid screening and enrichment method is reported for exploring the size and shape diversities (libraries) of nanometer-scale colloidal particles. With the use of surface-enhanced Raman scattering, a new class of metal nanoparticles has been identified from heterogeneous silver colloids. These particles are relatively large, faceted nanocrystals that are able to enhance the efficiencies of surface optical processes by as much as 14-15 orders of magnitude. The population of these novel nanoparticles is only about 0.1-1% in standard colloid preparations but can be enriched to about 10-15% by size-selective fractionation. This new class of nanoparticles could find potential uses in optoelectronic devices, ultrasensitive chemical sensors, and single-molecule detection.

Original languageEnglish (US)
Pages (from-to)493-497
Number of pages5
JournalJournal of Physical Chemistry B
Issue number3
StatePublished - Jan 15 1998
Externally publishedYes

ASJC Scopus subject areas

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


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