We investigate through ab-initio simulations the gold-8PyrroleDiThiol-gold (Au-8PyDT) molecular quantum dot as an amperometric single-molecule sensor for the aflatoxin B1 (AFB1) detection. We study the adsorption of AFB1 onto the Au-8PyDT and we analyze the transport characteristics for the most probable adsorption configuration. We find that a significant current modulation occurs, with around 80% of current decrease in presence of AFB1. Interestingly, the investigated sensor exhibits a voltage-dependent response, that we motivate through a transmission properties analysis. Our results, considering the synthesis simplicity of PolyPyrroles and their non-toxicity, motivate future research efforts in this direction.

Single-molecule Aflatoxin B1 Sensing via Pyrrole-based Molecular Quantum Dot / Mo, Fabrizio; Spano, Chiara Elfi; Ardesi, Yuri; Roch, Massimo Ruo; Piccinini, Gianluca; Graziano, Mariagrazia. - ELETTRONICO. - (2022), pp. 153-156. ((Intervento presentato al convegno 22nd IEEE International Conference on Nanotechnology tenutosi a Palma de Mallorca, Spain nel 04-08 July 2022 [10.1109/NANO54668.2022.9928694].

Single-molecule Aflatoxin B1 Sensing via Pyrrole-based Molecular Quantum Dot

Mo, Fabrizio;Spano, Chiara Elfi;Ardesi, Yuri;Roch, Massimo Ruo;Piccinini, Gianluca;Graziano, Mariagrazia
2022

Abstract

We investigate through ab-initio simulations the gold-8PyrroleDiThiol-gold (Au-8PyDT) molecular quantum dot as an amperometric single-molecule sensor for the aflatoxin B1 (AFB1) detection. We study the adsorption of AFB1 onto the Au-8PyDT and we analyze the transport characteristics for the most probable adsorption configuration. We find that a significant current modulation occurs, with around 80% of current decrease in presence of AFB1. Interestingly, the investigated sensor exhibits a voltage-dependent response, that we motivate through a transmission properties analysis. Our results, considering the synthesis simplicity of PolyPyrroles and their non-toxicity, motivate future research efforts in this direction.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2973277