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Photonic Crystal-Based Sensing and Imaging of Potassium Ions

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Fenzl, Christoph ; Kirchinger, Michael ; Hirsch, Thomas ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 06 Feb 2015 11:30


We report on a method for selective optical sensing and imaging of potassium ions using a sandwich assembly composed of layers of photonic crystals and an ion-selective membrane. This represents a new scheme for sensing ions in that an ionic strength-sensitive photonic crystal hydrogel layer is combined with a K+-selective membrane. The latter consists of plasticized poly(vinyl chloride) doped ...


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