▎ 摘　　要

We confirmed the specific detection of immunoglobulin E (IgE) using an aptamer-immobilized reduced graphene oxide (rGO) field effect transistor (FET). The detection limit and dynamic range were estimated to be 8.1 ng/ml and 104, respectively. These characteristics are comparable with these of current fluorescent markers. Although the mobility of rGO-FET was around 6 cm(2)V(-1) s(-1), which is two to three orders lower than that of mechanically exfoliated pristine graphene FET, its sensitivity to IgE was only one order lower than that of pristine graphene FET. (C) 2014 The Japan Society of Applied Physics