• 文献标题:   Transfer-Medium-Free Nanofiber-Reinforced Graphene Film and Applications in Wearable Transparent Pressure Sensors
  • 文献类型:   Article
  • 作  者:   REN HY, ZHENG LM, WANG GR, GAO X, TAN ZJ, SHAN JY, CUI LZ, LI K, JIAN MQ, ZHU LC, ZHANG YY, PENG HL, WEI D, LIU ZF
  • 作者关键词:   graphene, polyacrylonitrile nanofiber, graphene transfer, electrospinning chemical vapor deposition, conductive transparent film, flexible pressure sensor
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:   Peking Univ
  • 被引频次:   26
  • DOI:   10.1021/acsnano.9b00395
  • 出版年:   2019

▎ 摘  要

Graphene exhibits properties of atomic thickness, high transparency, and high carrier mobility, which is highly desirable for a flexible transparent conductive material. However, the electronic properties of large-area chemical vapor deposition grown graphene film suffer from insulated polymer contaminations introduced by the transfer process and the easily cracked nature. Here, we report a preparation method of a transfer medium -free large-area nanofiber-reinforced graphene (aPAN/G) film simply by annealing the electrostatically spun polyacrylonitrile (PAN) nanofibers on the graphene film. The film could be free-standing on water and suspended in air with high transparency and enhanced electrical and mechanical properties compared to that of a monolayer graphene film. The flexible transparent a-PAN/G films were demonstrated as active materials for sensitive pressure sensors. The obtained pressure sensors demonstrate high sensitivity (44.5 kPa' within 1.2 kPa), low operating voltage (0.01-0.5 V), and excellent stability for 5500 loading unloading cycles, revealing promising potential applications in wearable electronics.