Design of "turn-ON and turn-OFF" fluorescence switching based photonic logic gates through multiple input-output...

We demonstrate Boolean logic gates like behavior of Molybdenum disulfide quantum dots (MoS₂ QDs) based on "turn-ON" and "turn-OFF" fluorescence switching response upon the addition of various biomolecules, carbon based materials and other organic molecules as inputs. The logic gates are constructed through single input single output (SISO), double inputs single output (DISO) and single input double outputs (SIDO) models. The fluorescence enhancement/"turn-ON" response of MoS₂ QDs is observed in the presence of glucose and bovine serum albumin (BSA). The fluorescence quenching/"turn-OFF" response of MoS₂ QDs is observed in the presence of graphene oxide (GO), reduced graphene oxide (RGO) and poly aniline (PANI) and interestingly, this quenched fluorescence is recovered back in the presence of additional input BSA. These fluorescence "turn-ON" and "turn-OFF" responses of MoS₂ QDs in the presence of various inputs demonstrate the Boolean logic operations include YES, NOT, PASS0, OR, NOR and IMPLICATIOIN.