Fabrication of Electrochemical Electrodes Based on Platinum and \(\text{ZnO}\) Nanofibers for Biosensing Applications

Dang Thi Thanh Le, Nguyen Van Hoang, Nguyen Van Hieu, Vu Quang Khue, Tran Quang Huy

Abstract


Platinum (Pt) electrodes were designed in imitation of screen-printed electrodes, and prepared by microelectronic techniques. These electrodes were then modified with zinc oxide (ZnO) nanofibers for biosensing applications. ZnO nanofibers with average length \( \sim 20-30\; \mu\) m and diameter \(\sim 150\) nm in hexagonal crystalline structure are prepared using electrospinning method. Their surface characteristics were analyzed by field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. Electrochemical properties of modified Pt electrodes were investigated in comparison with commercial carbon screen-printed electrodes. The results showed that the cyclic voltammogram of modified Pt electrodes was stable, but has much lower resistance compared to that of carbon screen-printed electrodes.

Keywords


biosensing, nanofibers, electrochemical Pt electrodes, ZnO

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