Colorimetric Nitrite and Nitrate detection with gold nanoparticle probes and kinetic end points

Weston L. Daniel, Min Su Han, Jae-Seung Lee, Chad A. Mirkin

Research output: Contribution to journalArticle

239 Citations (Scopus)

Abstract

We report the development of a novel colorimetric nitrite and nitrate ion assay based upon gold nanoparticle probes functionalized with Griess reaction reagents. This assay takes advantage of the distance-dependent plasmonic properties of the gold nanoparticles and the ability of nitrite ion to facilitate the cross coupling of novel nanoparticle probes modified with aniline and naphthalene moieties. The assay works on the concept of a kinetic end point and can be triggered at the EPA limit for this ion in drinking water (highlighted in red, -M). This rapid and simple assay could be useful for on-site water quality monitoring.

Original languageEnglish
Pages (from-to)6362-6363
Number of pages2
JournalJournal of the American Chemical Society
Volume131
Issue number18
DOIs
Publication statusPublished - 2009 May 13

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

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