Electrodes serve as primary biosensors for collecting biopotential signals. This work proposed a design and a fabrication protocol of a dry microneedle electrode (DME) to enhance comfort, usability, and signal quality in comparison to traditional electrodes. This work introduced the utilization of the Nickel electroless plating method to transform the non-conductive polymeric microneedle into a conductive microneedle. Mechanical strength testing demonstrated the robustness of the microneedles, capable of skin penetration without needle breakage. Porcine skin penetration experiments showcased a commendable 91.35% rate of succession in effectively mitigating the skin surface impedance. Impedance tests further highlight the low impedance and high stability of DME across frequency ranges over commercial wet electrodes. The result of this work was expected to contribute to the development of a reliable and efficient tool for non-invasive bio-signal monitoring in healthcare and medical research.

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Fabrication and Evaluation of Metalized Polymeric Microneedle Array as a Dry Electrode for Measuring Biosignals

  • Hai-Yen Vu Thi,
  • Van-Anh Nguyen Thi,
  • Diem Quynh Le Hai,
  • Le-Giang Tran

摘要

Electrodes serve as primary biosensors for collecting biopotential signals. This work proposed a design and a fabrication protocol of a dry microneedle electrode (DME) to enhance comfort, usability, and signal quality in comparison to traditional electrodes. This work introduced the utilization of the Nickel electroless plating method to transform the non-conductive polymeric microneedle into a conductive microneedle. Mechanical strength testing demonstrated the robustness of the microneedles, capable of skin penetration without needle breakage. Porcine skin penetration experiments showcased a commendable 91.35% rate of succession in effectively mitigating the skin surface impedance. Impedance tests further highlight the low impedance and high stability of DME across frequency ranges over commercial wet electrodes. The result of this work was expected to contribute to the development of a reliable and efficient tool for non-invasive bio-signal monitoring in healthcare and medical research.