This is a schematic diagram of a metal-organic framework (SURMOF, left), the framework after cross-linking (center), and after copper ions have dissolved out (right).

The electron density distribution diagrams generated by the interaction of the petawatt laser with nitrogen gas jets for various nitrogen gas jet pressures at time instant 1000 fs. (IMAGE) ...

The metallic behaviour of the resistivity observed at low temperatures in low-disorder, dilute, two-dimensional (2D) carrier systems is of considerable interest as it defies the scaling theory of ...