Logical Combination

Logical Combination

Author: David Bradley

Chemists have investigated the possibilities of building logical units – akin to semiconductor-based circuits – from molecules for years.

By hooking together photoswitchable, bistable chromophores in a single molecule, an international team has successfully built a multifunctional device. Rather than requiring chemical, electrical thermal, or pH input, this device can absorb information via photonic input, process it and generate a photonic output. The superficially simple but sophisticated device can be made to operate as various types of logic gate as well as to function as a keypad lock.

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