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. Author manuscript; available in PMC: 2022 May 27.
Published in final edited form as: Chem Soc Rev. 2021 Jul 6;50(16):8954–8994. doi: 10.1039/d1cs00240f

Fig. 18.

Fig. 18

Portable DNAzyme devices for the detection of Pb2+ based on visual reading of capillary flow. (A) A portable hydrogel capillary sensor. Reprinted (adapted) from C. Jiang, Y. Li, H. Wang, D. Chen and Y. Wen, A portable visual capillary sensor based on functional DNA crosslinked hydrogel for point-of-care detection of lead ion, Sens. Actuators, B, 2020, 307, 127625, with permission from Elsevier.177 (B) A portable sensor with a microfluidic particle dam. Reprinted (adapted) with permission from G. Wang, L. T. Chu, H. Hartanto, W. B. Utomo, R. A. Pravasta and T.-H. Chen, Microfluidic Particle Dam for Visual and Quantitative Detection of Lead Ions, ACS Sens., 2020, 5, 19–23. Copyright 2020, American Chemical Society.178