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. 2007 Mar;387(6):2121-30.
doi: 10.1007/s00216-006-1088-8. Epub 2007 Feb 16.

Cation Identity Dependence of Crown Ether Photonic Crystal Pb2+ Sensing

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Cation Identity Dependence of Crown Ether Photonic Crystal Pb2+ Sensing

Fangyong Yan et al. Anal Bioanal Chem. .

Abstract

We quantitatively modeled the volume phase transition of a hydrogel containing a crystalline colloidal array with a crown ether ligand which binds Pb2+. The hydrogel volume response and the wavelength diffracted depend on the Pb2+ concentration and on both the ionic strength and the valence of the nonbinding ionic species. We successfully modeled the response of this hydrogel Pb2+ sensor to ionic strength and the cation valence of the added salts.

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