▎ 摘　　要

Owing to its extraordinary electronic property, chemical stability and unique two-dimensional nanostructure graphene is being considered as an ideal material for the highly expected all-carbon based micro/nanoscale electronics. Herein we present a simple yelversatile approach to constructing all-carbon micro/nanoelectronics using solution-processing graphene films directly. From these graphene films, various graphene-based microcosmic patterns and structures have been fabricated using maskless computer controlled laser cutting. Furthermore a complete system involving a prototype of a flexible write-once read-many-times memory card and a fast data-reading system has been demonstrated with infinite data retention time and high reliability. These results indicate that graphene could be the ideal material for fabricating the highly demanded all-carbon and flexible devices and electronics using the simple and efficient roll-to-roll printing process when combined with maskless direct data writing.