Silicon chips have thousands of electronic logic gates etched on them. But there are other ways to decorate monolithic surfaces with logic gates, as a system using metal complexes secured to glass slides shows.
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de Silva, A. A layer of logic. Nature 454, 417–418 (2008). https://doi.org/10.1038/454417a
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DOI: https://doi.org/10.1038/454417a
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