▎ 摘　　要

Flexible and transparent electronic devices with extremely high mobilities are fabricated from a graphene sheet, a single atomic layer of graphite, by using the transfer printing method. "Printed" graphene circuits achieve field effect mobilities Of Up to 10000 CM2/Vs at room temperature. Our printing technique is scaleable and a more chemically-gentle process for fabricating high quality graphene, and nanoscale devices in general.