A three-valued photoelectrochemical logic device realising accept anything and consensus operations

Warzecha, Monika; Oszajca, Marcin; Pilarczyk, Kacper; Szaciłowski, Konrad

doi:10.1039/c4cc09980j

Cited by 32 publications

(29 citation statements)

References 25 publications

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“…Due to its simplicity it can be applied for signal and pattern processing and could be integrated into larger neuromimetic systems. Furthermore, along with bioinspired neuromorphic computing, other information processing paradigms may be implemented within the same system: Boolean logic [43], ternary logic [44] and fuzzy logic [45]. The latter one is especially tempting, as it may contribute to the development of novel neuro-fuzzy information processing devices [46,47,48].…”

Section: Resultsmentioning

confidence: 99%

Hardware Realization of the Pattern Recognition with an Artificial Neuromorphic Device Exhibiting a Short-Term Memory

et al. 2019

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Materials exhibiting memory or those capable of implementing certain learning schemes are the basic building blocks used in hardware realizations of the neuromorphic computing. One of the common goals within this paradigm assumes the integration of hardware and software solutions, leading to a substantial efficiency enhancement in complex classification tasks. At the same time, the use of unconventional approaches towards signal processing based on information carriers other than electrical carriers seems to be an interesting trend in the design of modern electronics. In this context, the implementation of light-sensitive elements appears particularly attractive. In this work, we combine the abovementioned ideas by using a simple optoelectronic device exhibiting a short-term memory for a rudimentary classification performed on a handwritten digits set extracted from the Modified National Institute of Standards and Technology Database (MNIST)(being one of the standards used for benchmarking of such systems). The input data was encoded into light pulses corresponding to black (ON-state) and white (OFF-state) pixels constituting a digit and used in this form to irradiate a polycrystalline cadmium sulfide electrode. An appropriate selection of time intervals between pulses allows utilization of a complex kinetics of charge trapping/detrapping events, yielding a short-term synaptic-like plasticity which in turn leads to the improvement of data separability. To the best of our knowledge, this contribution presents the simplest hardware realization of a classification system capable of performing neural network tasks without any sophisticated data processing.

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Section: Resultsmentioning

confidence: 99%

Hardware Realization of the Pattern Recognition with an Artificial Neuromorphic Device Exhibiting a Short-Term Memory

et al. 2019

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“…This is the reason behind the exploration of ternary, quaternary, and fuzzy logic systems, the intensification of works on neuromorphic engineering, and more extravagant approaches . Some preliminary studies on the use of chemical, electrochemical and photochemical systems along with the three‐valued logic formalism have already been presented—for organic compounds in solutions by U. Pischel, for elements composed of carbon nanostructures by P. Viswa Saidutt, for DNA‐based systems by R. Orbach and E. Wang, and for solid‐state devices by the authors of this work . Switching to the ternary logic may be one of the solutions for the breakdown of Moore′s law, which is expected to happen in approximately ten years.…”

Section: Introductionmentioning

confidence: 90%

Organotitania‐Based Nanostructures as a Suitable Platform for the Implementation of Binary, Ternary, and Fuzzy Logic Systems

et al. 2017

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Titanium dioxide nanocomposites were synthesized in hierarchical architectures through the use of a 1,4‐dihydroxyanthraquinone photosensitizer. In the first step, the dye was either incorporated into the TiO2 core or adsorbed on its surface. In the subsequent phase, both structures were covered with an outer layer of titanium dioxide. The structure, morphology, aggregation, spectroscopic, and electrochemical properties of the synthesized TiO2‐based materials are presented with emphasis on the photosensitization and the photocurrent switching phenomena, which are also discussed within the context of the optical logic gates implementation and fuzzy logic systems operation. We present three different interpretations of the photocurrent action spectra yielding binary, ternary, or fuzzy logic circuits.

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“…More subtle, but still very important variation happens in the anodic region, where the profile of the slope is perturbed. We assume it is caused directly by a competition between typically observed anodic current and enhanced-in the case of the ternary hybridcathodic response, a situation similar to the ones discussed in our previous works 13,39 .…”

Section: Discussionmentioning

confidence: 82%

Light intensity-induced photocurrent switching effect

et al. 2020

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A better control over processes responsible for the photocurrent generation in semiconductors and nanocomposites is essential in the fabrication of photovoltaic devices, efficient photocatalysts and optoelectronic elements. Therefore, new approaches towards photochemical properties tuning are intensively searched for. Among numerous parameters, the photocurrent polarity is of great importance to the overall performance of a device. Usually, the polarity is controlled through an alignment of electronic states/bands, tailoring of applied potential or suitable selection of incident light wavelengths. In most scenarios though, the influence of light intensity is somehow neglected and either some arbitrarily chosen, natural conditions are mimicked or this parameter is varied only in a narrow range. Here we present a ternary nanocomposite in which the persistent photocurrent polarity switching is achieved through changes in the light intensity. We also present arguments suggesting this behaviour is of a general character and should be considered also in other photochemical systems.

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A three-valued photoelectrochemical logic device realising accept anything and consensus operations

Cited by 32 publications

References 25 publications

Hardware Realization of the Pattern Recognition with an Artificial Neuromorphic Device Exhibiting a Short-Term Memory

Hardware Realization of the Pattern Recognition with an Artificial Neuromorphic Device Exhibiting a Short-Term Memory

Organotitania‐Based Nanostructures as a Suitable Platform for the Implementation of Binary, Ternary, and Fuzzy Logic Systems

Light intensity-induced photocurrent switching effect

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