title: Engineering graphene mechanical systems.
abstract: We report a method to introduce direct bonding between graphene platelets that enables the transformation of a multilayer chemically modified graphene (CMG) film from a "paper mache-like" structure into a stiff, high strength material. On the basis of chemical/defect manipulation and recrystallization, this technique allows wide-range engineering of mechanical properties (stiffness, strength, density, and built-in stress) in ultrathin CMG films. A dramatic increase in the Young's modulus (up to 800 GPa) and enhanced strength (sustainable stress ≥1 GPa) due to cross-linking, in combination with high tensile stress, produced high-performance (quality factor of 31,000 at room temperature) radio frequency nanomechanical resonators. The ability to fine-tune intraplatelet mechanical properties through chemical modification and to locally activate direct carbon-carbon bonding within carbon-based nanomaterials will transform these systems into true "materials-by-design" for nanomechanics.
authors: Naval Research Laboratory, Washington, D.C. 20375, United States.
authors: Maxim K
authors: MK
authors: Zalalutdinov
authors: Jeremy T
authors: JT
authors: Robinson
authors: Chad E
authors: CE
authors: Junkermeier
authors: James C
authors: JC
authors: Culbertson
authors: Thomas L
authors: TL
authors: Reinecke
authors: Rory
authors: R
authors: Stine
authors: Paul E
authors: PE
authors: Sheehan
authors: Brian H
authors: BH
authors: Houston
authors: Eric S
authors: ES
authors: Snow