Author/Authors :
Capasso، نويسنده , , A. and Placidi، نويسنده , , Patricia E. and Zhan، نويسنده , , H.F. and Perfetto، نويسنده , , E. and Bell، نويسنده , , J.M. and Gu، نويسنده , , Y.T. and Motta، نويسنده , , N.، نويسنده ,
Abstract :
Atomic scale periodic ripples that extend for several nanometers on the surface of adjacent graphitic grains have been observed for the first time on highly ordered pyrolitic graphite by UHV-STM. The ripples emanate from a grain boundary, and are explained in terms of a mechanical deformation due to the elastic strain accumulated along the GB, which is relieved out-of-plane in the topmost graphene layer. We present a molecular dynamics model that accounts for the formation of similar ripples as result of the lattice mismatch induced by two different grain orientations.
