科研之友
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摘要
One-step laser direct writing (LDW) is becoming an effective method in the production of conductive circuits on the surface of polyimide (PI). The laser radiation can significantly improve the conductivity of the polymer and result in potential applications in the microelectronics and sensing. We studied the effect of laser power and scanning speed on the conductivity of the LDW generated circuit with assistance of scanning electron microscope, Raman spectroscopy and electrochemical workstation. Although laser direct writing technique can greatly improve the conductivity of polyimide films, there is a certain limitation of this improvement. Therefore, we adopted two methods to further enhance the electrical conductivity: (1) PI surface coated with metal ion solution to form the surface composite of metal and carbonated structure through laser irradiation; and (2) the addition of metal nano-plates and graphene oxide into poly (amic acid) (PAA) solution as the precursor of polyimide. The results show that the latter is more effective. The conductive circuit on polyimide generated by LDW can be used as flexible and wearable sensors to monitor the change of stress and as a platform for other sensing.
- 出版日期2017-4
- 单位北京工业大学
