[15p-2T-1~18] 17.3 Exploration of new functions and evaluation of basic properties

△ [15p-2T-2] Changes in Graphene Ambipolarity Due to Protein Absorption

〇Yana Mulyana¹, Mutsunori Uenuma¹, Naofumi Okamoto¹, Yasuaki Ishikawa¹, Ichiro Yamashita¹, Yukiharu Uraoka¹ (1.NAIST)

Keywords:graphene,protein absorption,ambipolar characteristic

Graphene possesses chemically and electronically exceptional properties, for instance, a great chemical stability and an enormous field-effect charge mobility even at room temperature. Moreover, since graphene is consisted only of carbon atoms, it is expected to have a superior bio-compatibility to other inorganic materials. In the current study, we investigated the interactions between graphene and bio-molecules such as ferritin. Ferritin is a protein complex consisting of 24 protein subunits, and capable of storing iron. We used two types of ferritin, which are apoferritin and iron-cored ferritin. Apoferritin is an empty ferritin or empty protein cavity. The interactions between graphene ferritin were investigated by examining the changes in transfer characteristic or ambipolarity curves of graphene-based field-effect transistors (G-FETs) after absorptions of those proteins. The changes in ambipolar curves were observed after several times dropping 0.3 µL of solution of each protein and pure water with a concentration of 1 mg/mL on graphene layer.