Triboelectrification-Induced Large Electric Power Generation from a Single Moving Droplet on Graphene/Polytetrafluoroethylene

Sung Soo Kwak, Shisheng Lin, Jeong Hwan Lee, Hanjun Ryu, Tae Yun Kim, Huikai Zhong, Hongsheng Chen, Sang Woo Kim

Research output: Contribution to journalArticlepeer-review


Recently, several reports have demonstrated that a moving droplet of seawater or ionic solution over monolayer graphene produces an electric power of about 19 nW, and this has been suggested to be a result of the pseudocapacitive effect between graphene and the liquid droplet. Here, we show that the change in the triboelectrification-induced pseudocapacitance between the water droplet and monolayer graphene on polytetrafluoroethylene (PTFE) results in a large power output of about 1.9 μW, which is about 100 times larger than that presented in previous research. During the graphene transfer process, a very strong negative triboelectric potential is generated on the surface of the PTFE. Positive and negative charge accumulation, respectively, occurs on the bottom and the top surfaces of graphene due to the triboelectric potential, and the negative charges that accumulate on the top surface of graphene are driven forward by the moving droplet, charging and discharging at the front and rear of the droplet.

Original languageEnglish
Pages (from-to)7297-7302
Number of pages6
JournalACS Nano
Issue number8
Publication statusPublished - 2016 Aug 23

Bibliographical note

Funding Information:
This work was financially supported by the Framework of International Cooperation Program managed by National Research Foundation of Korea grant (NRF- 2015K2A2A7056357) funded by the Ministry of Science, ICT & Future Planning and Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), and the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20154030200870).

Publisher Copyright:
© 2016 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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