The 81st JSAP Autumn Meeting, 2020

Presentation information

Oral presentation

12 Organic Molecules and Bioelectronics » 12.6 Nanobiotechnology

[11a-Z12-1~10] 12.6 Nanobiotechnology

Fri. Sep 11, 2020 8:30 AM - 11:30 AM Z12

Koji Sumitomo(Univ. of Hyogo), Yoichiroh Hosokawa(NAIST), Takeo Miyake(Waseda Univ.)

8:45 AM - 9:00 AM

[11a-Z12-2] Charge Transfer Enhancement by the Second Redox Mediator

Huanwen Han1, Kazuyuki Nobusawa2, Ting-Chieh Chu1, Ichiro Yamashita1 (1.Grad. of Sch. Eng. Osaka Univ., 2.Textile Res. Ins. Gunma Pre. Gov.)

Keywords:EIS, Redox Probe, Second Mediator

Introduction
Electrochemical Impedance Spectroscopy (EIS) is a method wildly used for interface measurement and has high potential in biomolecules detection. The impedances can monitor the charge-transfer between electrode and electro-chemical redox probes. Magnifying of the charge transfer process will lead to high measurement performance. [1] The selection of the redox probe depends on various parameters. Fe(CN)63-/4-, Ru(NH3)63+/2+, p-benzoquinone/hydroquinone are widely used to monitor the charge transfer. [2, 3] 1 - 10 mM Fe(CN)63-/4- is the most frequently used as a redox probe pair. Recently, we have discovered that the addition of a small amount of second redox probe to the popular ferricyanide/ferrocyanide results in a significant improvement in charge-transfer.