Atomic force microscopy of crystalline chains of the organic molecule Parahexaphenyl (6P) deposited on graphene. The single-layer graphene had been prepared by chemical vapor deposition on copper and transferred onto silicon oxide with polymethylacrylate. The crystalline 6P chains become the longer, the less PMMA residua are present. (Image size: 5 µm x 5µm; color scale: 0 nm - brown to 30 nm - white)
The picture has been chosen by the editors of Applied Physics Letters for a cover in March 2015. It was created in a cooperation between the Institute of Physics of Leoben University, and the universities of Cambridge, Vienna and Belgrade.