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pH sensor based on upconverting luminescent lanthanide nanorods

DOI to cite this document:
Sun, Li-Ning ; Peng, Hongshang ; Stich, Matthias I. J. ; Achatz, Daniela E. ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 18 Mar 2011 07:05


The pH sensor exploits the phenomenon of upconversion luminescence and is based on a hydrogel matrix containing (a) nanorods of the NaYF4: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.

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