Journal
CHEMICAL SCIENCE
Volume 6, Issue 5, Pages 2859-2868Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4sc03425b
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Funding
- European project FP7-ICT-8 PhyChip-Physarum Chip: Growing Computers from Slime Mould [316366]
- Provincia Autonoma di Trento
- Fondazione Cassa di Risparmio di Parma (CAR-IPARMA) - project BioNiMed (Multifunctional Hybrid Nanosystems for Biomedical Applications)
- N-Chem project within the CNR-NANOMAX Flagship program
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A hybrid bio-organic electrochemical transistor was developed by interfacing an organic semiconductor, poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate), with the Physarum polycephalum cell. The system shows unprecedented performances since it could be operated both as a transistor, in a three-terminal configuration, and as a memristive device in a two terminal configuration mode. This is quite a remarkable achievement since, in the transistor mode, it can be used as a very sensitive bio-sensor directly monitoring biochemical processes occurring in the cell, while, as a memristive device, it represents one of the very first examples of a bio-hybrid system demonstrating such a property. Our system combines memory and sensing in the same system, possibly interfacing unconventional computing. The system was studied by a full electrical characterization using a series of different gate electrodes, namely made of Ag, Au and Pt, which typically show different operation modes in organic electrochemical transistors. Our experiment demonstrates that a remarkable sensing capability could potentially be implemented. We envisage that this system could be classified as a Bio-Organic Sensing/Memristive Device (BOSMD), where the dual functionality allows merging of the sensing and memory properties, paving the way to new and unexplored opportunities in bioelectronics.
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