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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Acknowledgement
We gratefully acknowledge financial support from NIH Grant EB004132. We are grateful to Dr Matti Ben-Moshe, who supplied us with his colloid.
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Yan, F., Asher, S. Cation identity dependence of crown ether photonic crystal Pb2+ sensing. Anal Bioanal Chem 387, 2121–2130 (2007). https://doi.org/10.1007/s00216-006-1088-8
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DOI: https://doi.org/10.1007/s00216-006-1088-8