Interaction of cesium adatoms with free-standing graphene and graphene-veiled SiO2 surfaces

Free-standing epitaxial graphene.

We report on a method to produce free-standing graphene sheets from epitaxial graphene on silicon carbide (SiC) substrate. Doubly clamped nanomechanical resonators with lengths up to 20 microm were patterned using this technique and their resonant motion was actuated and detected optically. Resonance frequencies of the order of tens of megahertz were measured for most devices, indicating that t...

Tearing of free-standing graphene.

We examine the fracture mechanics of tearing graphene. We present a molecular dynamics simulation of the propagation of cracks in clamped, free-standing graphene as a function of the out-of-plane force. The geometry is motivated by experimental configurations that expose graphene sheets to out-of-plane forces, such as back-gate voltage. We establish the geometry and basic energetics of failure ...

Long-range interaction between adatoms in graphene.

We present a theory of electron-mediated interaction between adatoms in graphene. In the case of resonant scattering, relevant for hydrogenated graphene, a long-range 1/r interaction is found. This interaction can be viewed as a fermionic analog of the Casimir interaction, in which massless fermions play the role of photons. The interaction is an attraction or a repulsion depending on whether t...

Bacterial Interaction with Graphene Particles and Surfaces

Plasmon spectroscopy of free-standing graphene films

T. Eberlein,1 U. Bangert,2 R. R. Nair,2,4 R. Jones,1 M. Gass,3 A. L. Bleloch,3 K. S. Novoselov,4 A. Geim,4 and P. R. Briddon5 1School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, United Kingdom 2School of Materials, The University of Manchester, Manchester M1 7HS, United Kingdom 3SuperSTEM Laboratories, CCLRC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom 4School o...