In addition, there are two gate voltages applied to the molecule as the two inputs of the logical gates.
The ring is symmetrically attached to two semi-infinite one-dimensional metallic electrodes, and two gate voltages, Va and Vb, are applied in one arm of the ring; these are treated as the two inputs of the OR gate.
The double quantum ring is sandwiched symmetrically between two semi-infinite one-dimensional metallic electrodes, and two gate voltages, namely, Va and Vb, are applied, respectively, in lower arms of the two rings those are treated as the two inputs of the NOR gate.
The double quantum ring is attached symmetrically to two semi-infinite one-dimensional metallic electrodes and two gate voltages, namely, Va and Vb, are applied, respectively, in the lower arms of the two rings which are treated as two inputs of the AND gate.
The ring, composed of identical quantum dots, is symmetrically attached to two semi-infinite one-dimensional metallic electrodes and two gate voltages, viz, Va and Vb, are applied, respectively, in each arm of the ring which are treated as the two inputs of the XOR gate.
Finally, after the last step the OR gate with three inputs of tetR and and an OR gate with two inputs of cI followed by a NOT gate are introduced.
Fig. 3A shows that the device behaves as expected, with clear digital-like logic AND characteristics: the sensor output is high only when both arsenic and mercury are above a certain threshold, similar to that of the single input sensors, sufficient to activate the two inputs of the genetic AND gate.
In this section, we discuss the design of nucleic acid molecular gates that follow the logic of all possible two inputs conventional logic gates.
The complete truth table of all the possible two input logic gates is listed in Table 2.
The partial products are set to zero by connecting the MB decoder output to two input AND gate and the other input of the AND is the control signal.
The gate g3 has two inputs, d (the output of gate g1) and a side input f.
