Redox-Executed Logic Operations through the Reversible Voltammetric Response Characteristics of Electroactive Self-Assembled Monolayers

Ganga Periyasamy; R. D. Levine; F. Remacle

doi:10.1071/CH09504

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Redox-Executed Logic Operations through the Reversible Voltammetric Response Characteristics of Electroactive Self-Assembled Monolayers

Ganga Periyasamy ^A , R. D. Levine ^B ^C ^D and F. Remacle ^A ^D

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, B6c, University of Liège, B4000 Liège, Belgium.

^B The Fritz Haber Research Center for Molecular Dynamics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

^C Department of Chemistry and Biochemistry, Crump Institute for Molecular Imaging and Department of Molecular and Medical Pharmacology, The University of California Los Angeles, Los Angeles, CA 90095, USA.

^D Corresponding authors. Email: fremacle@ulg.ac.be; rafi@fh.huji.ac.il

Australian Journal of Chemistry 63(2) 173-183 https://doi.org/10.1071/CH09504
Submitted: 19 September 2009 Accepted: 13 January 2010 Published: 26 February 2010

Abstract

We propose charge quantization in electrochemical oxidation–reduction (redox) systems as a route to performing logical operations efficiently and reversibly. The theory is based on the interfacial potential distribution for electrodes coated with electroactive self-assembled molecular films. We monitor the change in the oxidation number by studying the current as a function of the working and reference electrode potentials and of the temperature. Diamond-shaped regions can be defined that delineate the stability of a given redox species as a function of the applied and reference potentials. Using these electrochemical Coulomb diamonds, we then show the principles for the design of a complete set of binary gates and a finite-state set–reset machine. We demonstrate the analogies between these redox systems and nanoscale solid-state systems where the charging energy is finite. Redox systems allow simple logic operations at room temperature because typically the standard potential is higher than the thermal energy.

Acknowledgements

Our work is supported by the FET-Proactive STREP FP7 project MOLOC. G.P. is supported by a post-doctoral fellowship of the Inter-University Attraction Pole (IAP) project ‘Cluster and Nanowires’ of the Belgian Federal Government.

References

Redox-Executed Logic Operations through the Reversible Voltammetric Response Characteristics of Electroactive Self-Assembled Monolayers

Abstract

Acknowledgements

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