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. 2024 Apr 8;4(3):176–193. doi: 10.1021/acsnanoscienceau.3c00056

Figure 2.

Figure 2

Electron microscopy images (top, TEM; bottom, SEM) of CTAB-stabilized AuNPs. The letters designate the CTAB supplier: (A) Fluka (52370, ≥96%), (B) MP Biomedicals (194004, >98%), (C) Acros (22716V, ≥99%), (D) Sigma (H5882, ≥99%), and (E) Aldrich (855820, 95%). Interestingly, sourcing CTAB from different vendors results in either rods or spheres, though the label purity does not predict the shape direction (e.g., the Aldrich CTAB is only 95% yet produced spheres). Reproduced from ref (35). Copyright 2008 American Chemical Society.