A keypad locking system capable of processing entries at the molecular level has been recently developed in the month of December in 2006 by scientists at Weizmann Institute of Science and is named the MOLECULAR KEYPAD LOCKING SYSTEM.
A molecular keypad locking system is a molecular device that mimics an electronic keypad at molecular level. It is made up of molecules that fluoresce only in response to correct sequence of 3 input signals. These are an acidic molecule, an alkaline compound, and ultraviolet light. When the lock is exposed to one sequence of chemicals and light – the alkaline molecule, followed by ultraviolet light it will emit blue light. When the lock is given another “password”- the acid, the alkaline, and finally ultraviolet light- it will glow green.
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