Highly ordered pyrolitic graphite HOPG

As an ex situ technique for structural information on surfaces, STM is an excellent complement to the standard electron and ion diffraction probes of surface order. The STM method can identify both short range order and long range periodicity, as well as disordered surface layers (e.g., images of sorbic acid on Highly Ordered Pyrolitic Graphite (HOPG), vida infra). In contrast,... 

---