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. 2023 May 3;123(10):6716–6792. doi: 10.1021/acs.chemrev.2c00751

Figure 2.

Figure 2

Preparation of nanoporous gold (NPG) by electrochemical dealloying. (a) Au25Ag75 precursor (left) and as-dealloyed NPG sample (right). (b) Microstructure of NPG imaged by scanning electron microscopy. Inset shows the cross section of a sample that was intentionally cleaved using a scalpel; the scale bar corresponds to 300 μm. (c) Nanoporous gold disks air-dried after preparation. The samples were wetted by H2O (left) and n-pentane (right) before drying. Note, capillary-induced stresses cause bending and breaking of samples wetted by H2O which can be avoided by a final transfer to n-pentane. (a,b) Reproduced with permission from ref (192). Copyright 2020 The Author.