Single molecule 'switch' milestone for molecular electronics

The international team of scientists behind the breakthrough believe that molecules like the ones they have discovered could offer information density of around 250 terabits per square inch.

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In the study, molecules of an organic salt can be switched using a small electrical input to appear either bright or dark, which provides binary information. This this information can be written, read and erased at room temperature and in normal air pressures. Most previous research into molecular electronics for similar applications has been conducted in vacuum and at very low temperatures.

In a statement, Dr Stijn Mertens, Senior Lecturer in Electrochemical Surface Science at Lancaster University and lead researcher on the study, said: "There is an entire list of properties that a molecule has to possess to be useful as a molecular memory. Apart from being switchable in both directions under ambient conditions, it has to be stable for a long time in the bright and dark state, and also spontaneously form highly ordered layers that are only one molecule thick, in a process called self-assembly. Ours is the first example that combines all these features in the same molecule."