Cation identity dependence of crown ether photonic crystal Pb2+ sensing |
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| Authors: | Fangyong Yan Sanford Asher |
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| Affiliation: | (1) Department of Chemistry, Chevron Science Center, University of Pittsburgh, Pittsburgh, PA 15260, USA |
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| 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.  Figure Cation identity dependence of crown ether photonic crystal Pb+ sensing |
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| Keywords: | Phase transition Hydrogel Crystalline colloidal array Crown ether ligand Ionic strength Wavelength diffracted |
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