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. 2009 Sep 7:(33):5000-2.
doi: 10.1039/b907822c. Epub 2009 Jul 13.

pH sensor based on upconverting luminescent lanthanide nanorods

Li-Ning Sun  1 , Hongshang Peng, Matthias I J Stich, Daniela Achatz, Otto S Wolfbeis
Affiliations

pH sensor based on upconverting luminescent lanthanide nanorods

Li-Ning Sun et al. Chem Commun (Camb). .

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.

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