Dye-concentrated organically modified silica nanoparticles as a ratiometric fluorescent pH probe by one- and two-photon excitation

Sehoon Kim, Haridas E. Pudavar, Paras N. Prasad

Research output: Contribution to journalArticle

69 Citations (Scopus)


Basic dye-concentrated nanoparticles (∼ 33 nm in diameter) show fluorescence-based ratiometric pH response, by one- and two-photon excitations, with improved proton sensing ability (pKa ∼ 6.4) through nanoscopic intraparticle energy transfer.

Original languageEnglish
Pages (from-to)2071-2073
Number of pages3
JournalChemical Communications
Issue number19
Publication statusPublished - 2006 May 22
Externally publishedYes


ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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