Light-Driven Bipolar Electrochemical Logic Gates with Electrical or Optical Outputs.

We present the design of AND and OR logic gates made with silicon and carbon materials and operated by bipolar electrochemistry. Such devices require electrical and light inputs to function and generate an electrical output or, alternatively, an optical output that can be readily observed with the naked eye. These operators are stable over time and can work in a wide range of electrolyte concentrations. Finally, we show that the input electrical potential can be considerably lowered in the presence of the Fe^III(CN)₆³⁻/Fe^II(CN)₆⁴⁻ redox couple in solution. [ABSTRACT FROM AUTHOR]