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. 2023 Aug 10;13(8):801. doi: 10.3390/bios13080801

Figure 8.

Figure 8

(A). The principle of the colorimetric sensor for the LPSs. Route (a): aggregation of Au NSPs induced by the LBP; route (b): formation of LPSs–LBP complexes; route (c): interaction between Au NSPs and LPSs–LBP complexes. Reproduced with permission from [91]. Copyright 2016, Royal Society of Chemistry. (B) (a): The schematic illustration of the colorimetric assay of melamine using aptamer-functionalized Au NSPs. (b): The effect of overuse of Au NSPs on this colorimetric assay in practical applications. (c): The effect of overuse of aptamers on this colorimetric assay in practical applications. Reproduced with permission from [94]. Copyright 2018, Public Library Science. (C) Schematic illustration of the principle for colorimetric detection of heparin. Reproduced with permission from [95]. Copyright 2019, Royal Society of Chemistry.