Abstract
Biopotential is important and sensitive information in order to monitor and control growth condition for living cells. For detecting biopotential change accurately, a stable biocompatible polymer film is required. In this study, a stable surface of a SU-8 film is characterized, and it is possible for applying to a cover material of electrode surface or an element of a biological implanted device. Surface potential VSU-8 of a SU-8 film is measured by making a metallic electrode contact. As a standard equilibrium, VSU-8 indicates exponential decreasing to reach at +21mV. Biopotential Vbio of plant cells indicates large potential change for 10 to 42mV range. This potential change means an individualistic signal of living cells. By combination of a SU-8 film and living cells, it is capable of obtaining accurate and effective data.
