Ultrathin free-standing graphene oxide film based flexible touchless sensor

Lin Liu, Yingyi Wang, Guanghui Li, Sujie Qin*, Ting Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Ultrathin free-standing graphene oxide (GO) films were fabricated by vacuum filtration method assisted with Ni(OH)2 nanosheets as the sacrifice layer. The surface of the obtained GO film is very clean as the Ni(OH)2 nanosheets can be thoroughly etched by HCl. The thickness of the GO films can be well-controlled by changing the volume of GO dispersion, and the thinnest GO film reached ∼12 nm. As a novel and transparent dielectric material, the GO film has been applied as the dielectric layer for the flexible touchless capacitive sensor which can effectively distinguish the approaching of an insulator or a conductor.

Original languageEnglish
Article number013002
JournalJournal of Semiconductors
Issue number1
Publication statusPublished - Jan 2018


  • free-standing film
  • graphene oxide
  • touchless sensor

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