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Enhanced electrochemical stimuli multilayers based on a ferrocene-containing polymer

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  • Chemistry
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Science Bulletin

Abstract

Based on the noncovalent functionalization of ferrocene-grafted polyethylenimine (PEI-Fc) and carbon nanotubes (CNTs), CNT bundles are exfoliated by PEI-Fc solution and thus form stable compounds PEI-Fc@CNTs, which is used to construct the PEI-Fc@CNTs/DNA multilayers through layer-by-layer assembly. The multilayers show a highly uniform and homogeneous characteristic, which significantly improve the electrical property of the multilayers. Upon the oxidation electrical potential, the ferrocene groups are switched from reduction state ([Fe(C5H5)2]) to oxidation state ([Fe(C5H5)2]+), leading to change of microenvironments’ charge density, resulting in swelling of the multilayers and a final degree of swelling of 37 % and the decrease of multilayer stiffness. We maintain that electrochemical control over the swelling behavior of multilayers could have important implications for responsive coatings of nanoscale devices, including mechanically tunable surfaces which are used to modulate cellular activities and control drug delivery.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (21174126, 51333005, 21374095), the National Basic Research Program of China (2011CB606203), Research Fund for the Doctoral Program of Higher Education of China (20110101110037, 20120101130013), the Qianjiang Excellence Project of Zhejiang Province (2013R10035), and International Science & Technology Cooperation Program of China (2014DFG52320).

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Yi-**n Sun, Ke-Feng Ren, Guo-Xun Chang, Yi-**u Zhao, **ang-Sheng Liu & Jian Ji

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  1. Yi-**n Sun
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  2. Ke-Feng Ren
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  3. Guo-Xun Chang
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  4. Yi-**u Zhao
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  5. **ang-Sheng Liu
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  6. Jian Ji
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Correspondence to Ke-Feng Ren or Jian Ji.

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Sun, YX., Ren, KF., Chang, GX. et al. Enhanced electrochemical stimuli multilayers based on a ferrocene-containing polymer. Sci. Bull. 60, 936–942 (2015). https://doi.org/10.1007/s11434-015-0780-5

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  • DOI: https://doi.org/10.1007/s11434-015-0780-5

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