| Title |
Electrochemical Detection of Hydrogen Peroxide based on Viologen Monolayers |
| Authors |
최원석(Choi, Won-Suk) ; 이동윤(Lee, Dong-Yun) ; 박상현(Park, Sang-Hyun) ; 박재철(Park, Jae-Chul) ; 권영수(Kwon, Young-Soo) |
| Keywords |
Hydrogen peroxide ; Viologen ; Hemoglobin ; Cyclic voltammetry ; Detection limit |
| Abstract |
In this paper, we fabricated a biosensor for detecting hydrogen peroxide and investigated the sensing property. We prepared a viologen and hemoglobin modified gold electrode using self-assembly and layer by layer method. The electrochemical property of the viologen derivative was characterized in 0.1 M NaClO_4 electrolyte solution by cyclic voltammetry. The modified electrode showed reversible electrochemical properties and high stability. From the results, the viologen can act as a charge transfer mediator for access to the electrode surface. The catalytic characteristics of the designed sensor proved that hemoglobin has been kept in its natural structure and can retain its biological activity. The designed biosensor showed a fast amperometric response, excellent linearity and low detection limit. In addition, it had high sensitivity, good reproducibility and stability. |