▎ 摘　　要

Graphene is considered as an excellent biosensing material due to its outstanding and unique electronic properties such as providing large area detection, ultra-high mobility and ambipolar field-effect characteristic. In this paper, general conductance model of DNA sensor-based graphene is obtained, and the electrical performance of nanostructured graphene-based DNA sensor is evaluated by the current-voltage characteristic. As a result, by increasing the complementary DNA concentration, the drain current is going toward higher amounts.