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Eng."],"published-print":{"date-parts":[[2021,12,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Major efforts to reproduce the brain performances in terms of classification and pattern recognition have been focussed on the development of artificial neuromorphic systems based on top-down lithographic technologies typical of highly integrated components of digital computers. Unconventional computing has been proposed as an alternative exploiting the complexity and collective phenomena originating from various classes of physical substrates. Materials composed of a large number of non-linear nanoscale junctions are of particular interest: these systems, obtained by the self-assembling of nano-objects like nanoparticles and nanowires, results in non-linear conduction properties characterized by spatiotemporal correlation in their electrical activity. This appears particularly useful for classification of complex features: nonlinear projection into a high-dimensional space can make data linearly separable, providing classification solutions that are computationally very expensive with digital computers. Recently we reported that nanostructured Au films fabricated from the assembling of gold clusters by supersonic cluster beam deposition show a complex resistive switching behaviour. Their non-linear electric behaviour is remarkably stable and reproducible allowing the facile training of the devices on precise resistive states. Here we report about the fabrication and characterization of a device that allows the binary classification of Boolean functions by exploiting the properties of cluster-assembled Au films interconnecting a generic pattern of electrodes. This device, that constitutes a generalization of the perceptron, can receive inputs from different electrode configurations and generate a complete set of Boolean functions of <jats:italic>n<\/jats:italic> variables for classification tasks. We also show that the non-linear and non-local electrical conduction of cluster-assembled gold films, working at room temperature, allows the classification of non-linearly separable functions without previous training of the device.<\/jats:p>","DOI":"10.1088\/2634-4386\/ac29c9","type":"journal-article","created":{"date-parts":[[2021,9,24]],"date-time":"2021-09-24T22:11:18Z","timestamp":1632521478000},"page":"024007","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":30,"title":["A binary classifier based on a reconfigurable dense network of metallic nanojunctions"],"prefix":"10.1088","volume":"1","author":[{"given":"Matteo","family":"Mirigliano","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9314-1982","authenticated-orcid":false,"given":"Bruno","family":"Paroli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gianluca","family":"Martini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marco","family":"Fedrizzi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1476-7742","authenticated-orcid":false,"given":"Andrea","family":"Falqui","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alberto","family":"Casu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9325-4963","authenticated-orcid":false,"given":"Paolo","family":"Milani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2021,11,18]]},"reference":[{"key":"nceac29c9bib1","doi-asserted-by":"publisher","first-page":"1846","DOI":"10.1126\/science.282.5395.1846","article-title":"Consciousness and complexity","volume":"282","author":"Tononi","year":"1998","journal-title":"Science"},{"key":"nceac29c9bib2","author":"Kandel","year":"2000","edition":"4th edn"},{"key":"nceac29c9bib3","doi-asserted-by":"publisher","first-page":"474","DOI":"10.1016\/s1364-6613(98)01259-5","article-title":"Complexity and coherency: integrating information in the brain","volume":"2","author":"Tononi","year":"1998","journal-title":"Trends Cognit. 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