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The use of DNA molecules as a physical computational material has attracted much interest, especially in the area of DNA computing. DNAs are also useful for logical control and analysis of biological systems if efficient visualization methods are available. Here we present a quick and simple visualization technique that displays the results of the DNA computing process based on a colorimetric change induced by gold nanoparticle aggregation, and we apply it to the logic-based detection ofdoi:10.1088/0957-4484/19/39/395103 pmid:21832585 fatcat:24tq3jg2ejbodpf5ddwbkx6uce