Concepedia

pH sensor based on upconverting luminescent lanthanide nanorods

Lining Sun, Hongshang Peng, Matthias I. J. Stich, Daniela E. Achatz, Otto S. Wolfbeis

Chemical Communications · 2009 · 197 citations · 18 references

DOI

Concepts

Abstract

The pH sensor exploits the phenomenon of upconversion luminescence and is based on a hydrogel matrix containing (a) nanorods of the NaYF(4):Er,Yb type that can be excited with 980-nm laser light to give a green and red (dual) emission, and (b) a longwave absorbing pH probe that causes a pH-dependent inner filter effect.

References

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