In Situ Transmission Electron Microscopy Modulation of Transport in Graphene Nanoribbons.

ABSTRACT: In situ transmission electron microscopy (TEM) electronic transport measurements in nanoscale systems have been previously confined to two-electrode configurations. Here, we use the focused electron beam of a TEM to fabricate a three-electrode geometry from a continuous 2D material where the third electrode operates as side gate in a field-effect transistor configuration. Specifically, we demonstrate TEM nanosculpting of freestanding graphene sheets into graphene nanoribbons (GNRs) with proximal graphene side gates, together with in situ TEM transport measurements of the resulting GNRs, whose conductance is modulated by the side-gate potential. The TEM electron beam displaces carbon atoms from the graphene sheet, and its position is controlled with nanometer precision, allowing the fabrica

SUBMITTER: Rodriguez-Manzo JA 

PROVIDER: S-EPMC4850503 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature