Laser scribing of Ag-decorated graphene for high-performance and flexible heaters

Er Chieh Cho, Cai Wan Chang-Jian, Jen Hsien Huang, Rudder T. Wu, Cheng Zhang Lu, Kuen Chan Lee, Huei Chu Weng, Shih Chieh Hsu

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In this article, Ag nanoparticle decorated graphene-based film heaters are fabricated using a CO2 infrared laser writing technology. In this process, we use the commercial polyimide (PI) as carbon sources which can be directly converted into graphene during the laser irradiation. To prepare the Ag decorated graphene, the PI films are modified with KOH into potassium polyamate and incorporation of Ag+ ions through subsequent ion exchange prior to the laser irradiation. While the laser is irradiating on silvered PI, the temperature of the irradiated silvered PI increases in a flash leading to the reduction of Ag+ ions on the PI derived graphene (PDG) surface. The resultant Ag-decorated PDG (Ag-PDG) composites reveal an enhanced electric conductivity (16.2 Ω/sq.) with excellent mechanical properties. The flexible heaters constructed from the Ag-PDG film also show remarkable electrothermal performance in terms of saturated temperature (Ts, 248.3 °C), heating efficiency (142.8 °C cm2/W), response time (2.14 s) and durability with a small temperature deviation (1.3 °C) after 2000 bending cycles.

Original languageEnglish
JournalJournal of the Taiwan Institute of Chemical Engineers
Publication statusAccepted/In press - 2021


  • Electrothermal heater
  • Flexibility
  • Graphene
  • Laser
  • Polyimide

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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