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pH and ionic strength responsive photonic polymers fabricated by using colloidal crystal templating

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Abstract

In this paper, monodispersed silica particles were synthesized using tetraethoxysiliane hydrolyzing in ethanol by a Stöber–Fink–Bobn method and then self-assembled on cleaning glass slides to form silica colloidal crystals. After photopolymerization of methacrylic acid mixing with ethylene glycol dimethylacrylate and hydrofluoric acid etching, the pH-responsive polymers were obtained with highly 3D-ordered macroporous structures templated by silica colloidal crystals. These polymers films can swell or deswell in response to external stimuli, causing a change of Bragg diffraction to read pH or ionic strength of various solutions by optical signals or electrochemical signals. As an application, they can be used as chemical sensors to detect pH or ionic strength variation of environment.

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Acknowledgement

We gratefully acknowledge the financial support from the National Science Foundation of China (20473044, 20533050, 50673048), SRFDP (20060003080) and 973 Program (2006 CB806200).

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Authors and Affiliations

  1. School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China

    Jing Huang & Yihe Zhang

  2. Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China

    Jing Huang, Xiaobin Hu, Weixia Zhang & Guangtao Li

Authors
  1. Jing Huang
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  2. Xiaobin Hu
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  3. Weixia Zhang
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  4. Yihe Zhang
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  5. Guangtao Li
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Correspondence to Guangtao Li.

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Huang, J., Hu, X., Zhang, W. et al. pH and ionic strength responsive photonic polymers fabricated by using colloidal crystal templating. Colloid Polym Sci 286, 113–118 (2008). https://doi.org/10.1007/s00396-007-1775-9

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  • DOI: https://doi.org/10.1007/s00396-007-1775-9

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