An organic hydrogel film with micron-sized pillar array for real-time and indicator-free detection of Zn |
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| Authors: | Yu-Chiang Chao Yi-Sa Huang Hsin-Ping Wang Ssu-Ming Fu Chien-Hao Huang Yen-Chun Liang Wen-Cheng Yang Yu-Sheng Huang Gao-Fong Chang Hsiao-Wen Zan Hsin-Fei Meng Chen-Hsiung Hung Chien-Chung Fu |
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| Affiliation: | aInstitute of Physics, National Chiao Tung University, Hsinchu 300, Taiwan;bDepartment of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan;cDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan;dInstitute of MEMS, National Tsing Hua University, Hsinchu 300, Taiwan;eDepartment of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan;fMolecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan;gInstitute of Chemistry, Academia Sinica, Taipei 115, Taiwan |
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| Abstract: | A hydrogel sensing film for a real-time and indicator-free detection of Zn2+ is developed by embedding a fluorescent indicator 11,16-bis(phenyl)-6,6,21,21-tetramethyl-m-benzi-6,21-porphodimethene in a hydrogel host poly(2-hydroxyethyl methacrylate). The sensing film shows high stability and selectivity to Zn2+. 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 Zn2+ concentrations of 10−4 and 10−3 M, the response time is 30 and 3 s, respectively. |
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| Keywords: | Zinc Hydrogel Sensor Signaling molecule Real-time Indicator-free |
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