Recognition of potassium ion in water by 15-crown-5 functionalized gold nanoparticles.

@article{Lin2002RecognitionOP,
  title={Recognition of potassium ion in water by 15-crown-5 functionalized gold nanoparticles.},
  author={S Lin and Shi-wei Liu and Cunguo Lin and Chun-Hsien Chen},
  journal={Analytical chemistry},
  year={2002},
  volume={74 2},
  pages={
          330-5
        }
}
Reported here is an efficient recognition of K+ by 15-crown-5 functionalized gold nanoparticles in aqueous matrix containing physiologically important cations, such as Li+, Cs+, NH4+, Mg2+, Ca2+, and excess amount of Na+. Upon exposure to K+, the colloidal solution changes from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. The concentration ranges of K+ detected in this study are 0.099-0.48 mM and 7.6 microM-0.14 mM, when concentrations of… CONTINUE READING
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