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Flexible and biocompatible nanopaper-based electrode arrays for neural activity recording

  • Yichuan Guo
  • Zhiqiang Fang
  • Mingde Du
  • Long Yang
  • Leihou Shao
  • Xiaorui Zhang
  • Li Li
  • Jidong Shi
  • Jinsong Tao
  • Jinfen Wang
  • Hongbian Li
  • Ying Fang
Research Article
  • 55 Downloads

Abstract

Advances in neural electrode technologies can have a significant impact on both fundamental and applied neuroscience. Here, we report the development of flexible and biocompatible neural electrode arrays based on a nanopaper substrate. Nanopaper has important advantages with respect to polymers such as hydrophilicity and water wettability, which result in significantly enhanced biocompatibility, as confirmed by both in vitro viability assays and in vivo histological analysis. In addition, nanopaper exhibits high flexibility and good shape stability. Hence, nanopaper-based neural electrode arrays can conform to the convoluted cortical surface of a rat brain and allow stable multisite recording of epileptiform activity in vivo. Our results show that nanopaper-based electrode arrays represent promising candidates for the flexible and biocompatible recording of the neural activity.

Keywords

nanopaper neural electrode biocompatibility flexible epilepsy 

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Notes

Acknowledgements

We thank Prof. Qingfei Liu from School of Pharmaceutical Sciences in Tsinghua University for his kind help in cellulose homogenization. We thank Yuchen Lin for his help in AFM analysis. Y. F. thanks the support from the National Natural Science Foundation of China (Nos. 21673057 and 31600868) and Beijing Science and Technology Program (No. Z161100002116010). H. B. L. thanks from the support from BOE Technology Group Co., Ltd. under the project of nanopaper-based multifunctional flexible sensors and the National Key R&D Program of China (No. 2017YFF0209901).

Supplementary material

12274_2018_2005_MOESM1_ESM.pdf (1.6 mb)
Flexible and biocompatible nanopaper-based electrode arrays for neural activity recording

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Yichuan Guo
    • 1
    • 2
  • Zhiqiang Fang
    • 3
  • Mingde Du
    • 1
    • 2
  • Long Yang
    • 4
  • Leihou Shao
    • 1
    • 2
  • Xiaorui Zhang
    • 1
    • 2
  • Li Li
    • 1
    • 2
  • Jidong Shi
    • 1
    • 2
  • Jinsong Tao
    • 3
  • Jinfen Wang
    • 1
    • 2
  • Hongbian Li
    • 1
    • 2
  • Ying Fang
    • 1
    • 2
    • 5
  1. 1.CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhouChina
  4. 4.Department of Neurobiology, David Geffen School of MedicineUniversity of California, Los AngelesLos AngelesUSA
  5. 5.CAS Center for Excellence in Brain Science and Intelligence TechnologyShanghaiChina

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