Fig.2. High-resolution images of a short chain.
a) Three-dimensional topographic STM image of a characteristic atomic chain. Individual D2 molecules covering the whole area in a dense phase are resolved on the surface (one molecule is marked within a white ellipse) as a hexagonal pattern and on the chain. 9x9 nm2, 30 pA, +20 mV. b) Constant height current map of a quasi-1D chain measured showing atomic resolution. Every protrusion on the chain can be ascribed to a single D2 molecule, 9x3 nm2, +20 mV.
