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Electrochemical exfoliation enables the production of large quantities of optically accessible 2DMs with diverse morphology and large lateral sizes up to 20\u00a0\u00b5m. Image processing techniques are used to facilitate shape identification and matching within a dataset of 500 unique nanosheets. Rotational and translation invariant shape matching with no false positive matches between over 100\u2009000 unique shape pairings is shown. The approach enables individual nanosheets to be deposited onto products, such as packaging of luxury goods, pharmaceuticals, banknotes, etc., as a unique seal of authenticity. Quick inspection of the nanoscale tag by optical microscopy allows the shape to be compared against the genuine dataset, enabling unique identification. The optical features of 2D materials, such as Raman and\/or photoluminescence signals can be used as an additional chemical fingerprint, making the anticounterfeiting solution very robust.<\/jats:p>","DOI":"10.1002\/smll.202307232","type":"journal-article","created":{"date-parts":[[2023,12,11]],"date-time":"2023-12-11T03:00:32Z","timestamp":1702263632000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Novel Anticounterfeiting Solution Based on 2D Materials Produced by Electrochemical Exfoliation"],"prefix":"10.1002","volume":"20","author":[{"given":"Oliver","family":"Read","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Manchester  Manchester M13 9PL UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Khaled","family":"Parvez","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Manchester  Manchester M13 9PL 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