In-situ electronic characterization of graphene nanoconstrictions fabricated in a transmission electron microscope
arXiv:1110.5925 · doi:10.1021/nl2023756
Abstract
We report electronic measurements on high-quality graphene nanoconstrictions (GNCs) fabricated in a transmission electron microscope (TEM), and the first measurements on GNC conductance with an accurate measurement of constriction width down to 1 nm. To create the GNCs, freely-suspended graphene ribbons were fabricated using few-layer graphene grown by chemical vapor deposition. The ribbons were loaded into the TEM, and a current-annealing procedure was used to clean the material and improve its electronic characteristics. The TEM beam was then used to sculpt GNCs to a series of desired widths in the range 1 - 700 nm; after each sculpting step, the sample was imaged by TEM and its electronic properties measured in-situ. GNC conductance was found to be remarkably high, comparable to that of exfoliated graphene samples of similar size. The GNC conductance varied with width approximately as, where w is the constriction width in nanometers. GNCs support current densities greater than 120 \muA/nm2, two orders of magnitude higher than has been previously reported for graphene nanoribbons and 2000 times higher than copper.
17 pages, 4 figures. Accepted by Nano Letters
References in corpus (19)
- Electric Field Effect in Atomically Thin Carbon Films
- 30 inch Roll-Based Production of High-Quality Graphene Films for Flexible Transparent Electrodes
- Ultrahigh electron mobility in suspended graphene
- Energy Band Gap Engineering of Graphene Nanoribbons
- Energy Gaps in Graphene Nanoribbons
- Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
- Ultrafast graphene photodetector
- Chaotic Dirac billiard in graphene quantum dots
- Room Temperature All Semiconducting sub-10nm Graphene Nanoribbon Field-Effect Transistors
- Graphene: A sub-nanometer trans-electrode membrane
- DNA Translocation through Graphene Nanopores
- Intrinsic Response of Graphene Vapor Sensors
- Tailoring the atomic structure of graphene nanoribbons by STM lithography
- Current-induced cleaning of graphene
- Electron beam nanosculpting of suspended graphene sheets
- Atomic-scale electron-beam sculpting of defect-free graphene nanostructures
- DNA-decorated graphene chemical sensors
- Electronic Transport in Chemical Vapor Deposited Graphene Synthesized on Cu: Quantum Hall Effect and Weak Localization
- Gate-Defined Graphene Quantum Point Contact in the Quantum Hall Regime
Cited by in corpus (8)
- Towards atomically precise manipulation of 2D nanostructures in the electron microscope
- Graphene at high bias: cracking, layer by layer sublimation and fusing
- Time-dependent Landauer-Büttiker formula: application to transient dynamics in graphene nanoribbons
- Lattice Expansion in Seamless Bi layer Graphene Constrictions at High Bias
- Electron interference in ballistic graphene nanoconstrictions
- Graphene nanoribbons: relevance of etching process
- The Synthescope: A Vision for Combining Synthesis with Atomic Fabrication
- In Situ Study of the Impact of Aberration-Corrected Electron-Beam Lithography on the Electronic Transport of Suspended Graphene Devices