An organic hydrogel film with micron-sized pillar array for real-time and indicator-free detection of Zn2+
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چکیده
A hydrogel sensing film for a real-time and indicator-free detection of Zn is developed by embedding a fluorescent indicator 11,16-bis(phenyl)-6,6,21,21-tetramethyl-m-benzi-6,21porphodimethene in a hydrogel host poly(2-hydroxyethyl methacrylate). The sensing film shows high stability and selectivity to Zn. The sensitivity of the sensing film is increased by fabricating a micron-sized pillar array on the surface of the sensing film to increase the surface area. For Zn concentrations of 10 4 and 10 3 M, the response time is 30 and 3 s, respectively. 2011 Elsevier B.V. All rights reserved.
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تاریخ انتشار 2011