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. 2022 May 2;13:2372. doi: 10.1038/s41467-022-30124-x

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Schematic representation of glucose/GOx/HRP/ABTS cascade reaction. Here the color pattern is generated from production of the cyan-colored ABTS^+•. GOx: glucose oxidase, HRP: horseradish peroxidase, ABTS: 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid). b Random shaped pattern generated without applying audible sound (scale bar is 1.5 cm). c Time-dependent changes of a concentric ring pattern obtained by applying an audible sound input (40 Hz). d A line profile of image color intensity for the color pattern taken at 3 min. e Time-dependent changes in the image color intensity with standard deviation (N = 10) at the central region of the pattern and the first three antinodal concentric domains. f Schematic of the enzymatic cascade reaction with catalase as a competitive scavenger for H₂O₂. CAT: catalase. g Effect of catalase for the circular ABTS^+• pattern generation. The color intensities with standard deviation (N = 10) at the center of the patterns were compared. Inset: pattern images taken after 3 min of reaction.