Sensing strategy for lithium ion based on gold nanoparticles

Sherine O. Obare, Rachel E. Hollowell, Catherine Jones Murphy

Research output: Contribution to journalArticlepeer-review


The detection of Li+ is currently in demand for both biomedical and industrial applications. We here report the functionalization of 4 nm Au particles with a 1,10-phenanthroline ligand that binds selectively to Li+. The ligand binds to Li+ by forming a 2:1 ligand-metal complex, causing Au nanoparticles to aggregate. Au nanoparticle aggregation causes a shift in the extinction spectrum with a concomitant color change, providing a useful optical method of detecting Li+ in aqueous solution.

Original languageEnglish (US)
Pages (from-to)10407-10410
Number of pages4
Issue number26
StatePublished - Dec 24 2002
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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