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Light-Induced Ferroelectricity in Bioinspired Self-Assembled Diphenylalanine Nanotubes/Microtubes

Authors

  • Zhixing Gan,

    1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (P.R. China)
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  • Prof. Xinglong Wu,

    Corresponding author
    1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (P.R. China)
    • National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (P.R. China)
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  • Xiaobin Zhu,

    1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (P.R. China)
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  • Jiancang Shen

    1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093 (P.R. China)
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  • The authors sincerely thank Prof. X. M. Lv, Prof. D. Wu, and Dr. J. Su from the National Laboratory of Solid-State Microstructures, Nanjing University for their assistance in the measurement of polarization–electric field curves and Mrs. H. Xu and Mrs. J. Z. Ma from the Department of Electronic Science and Engineering, Nanjing University for the fabrication of the patterned Ni electrodes. This work was supported by the National Basic Research Program of China under grant numbers 2011CB922102 and 2013CB932901. Partial support was also from PAPD.

Abstract

original image

Spontaneous polarization reversal: Saturated polarization–electric field loops with a concave region were obtained from diphenylalanine peptide microtubes (FF PMTs) by combining the action of light during the hysteresis loop measurements (see picture; Ec=coercive field). The existence of ferroelectricity in FF peptide nanostructures was shown experimentally. The ferroelectricity of the FF PMTs is expected to extend their applications to biomedicine and microelectronics.

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