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. 2021 Sep 13;13:193. doi: 10.1007/s40820-021-00717-0

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© The Author(s) 2021

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 15 — a Overview of developed colorimetric and chronoamperometric assay for the detection of glucose using peroxidase-like activity of mesoporous iron oxide nanoparticles [242].

Copyright 2017 American Chemical Society. b Schematic representation of the assay for the detection of tumour-associated plasma (and serum) p53 autoantibody. A neutravidin-modified screen-printed carbon electrode was functionalized with biotinylated p53. Serum/plasma samples containing p53-specific autoantibody were then incubated with IgG/Au–NPFe₂O₃NC nanocatalysts. Au–NPFe₂O₃NC catalysed the oxidation of TMB in the presence of H₂O₂ and produced a blue-coloured complex product (naked eye). The level of p53 autoantibody was detected via measuring the intensity (UV–Vis) and amperometric current generated by the product [134]. Copyright 2017 American Chemical Society. c Schematic representation of a paper electrode-based flexible pressure sensor for point-of-care immunoassay with digital multimeter readout. Photographs of flexible pressure sensor, bendability of flexible pressure sensor, and immune device based on flexible pressure sensor [165]. Copyright 2018 American Chemical Society