Ion-selective nanoplasmonic optical sensor

Taewook Kang, Yeonho Choi, Dukhyun Choi, Eunice Lee, Luke P. Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we demonstrate a label-free ion-selective optical sensor for metal ion. This sensing mechanism is based on (1) selective formation of metal-ligand complex on the surface of nanoplasmonic probes and (2) selective plasmonic resonance energy transfer (PRET) between conjugated metal-ligand complex and gold nanoplasmonic probes (GNPs). We used functionalized GNP with ethylenediamine ligands in order to demonstrate high selectivity and sensitivity toward Cu2+. Due to the selective energy transfer from GNP to dd transition of the Cu2+ complex, the scattering spectrum of GNP changes quantitatively down to 1 nM of Cu2+. Moreover, this Cu2+ nanoplasmonic senor has selectivity over Na+, Ca2+, K+, and Mg2+

Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007
EditorsJean-Louis Viovy, Patrick Tabeling, Stephanie Descroix, Laurent Malaquin
PublisherChemical and Biological Microsystems Society
Pages464-466
Number of pages3
ISBN (Electronic)9780979806407
Publication statusPublished - 2007
Externally publishedYes
Event11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007 - Paris, France
Duration: 2007 Oct 72007 Oct 11

Publication series

NameProceedings of the 11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007

Conference

Conference11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007
CountryFrance
CityParis
Period07/10/707/10/11

Keywords

  • Gold Nanoparticle
  • Metal-Ligand Complex
  • Plasmonic Resonance Energy Transfer
  • Rayleigh Scattering

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Bioengineering

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