Fig. 4: Photothermal synthesis of silver nanoparticles/wires. | Nature Communications

Fig. 4: Photothermal synthesis of silver nanoparticles/wires.

From: Photothermally heated colloidal synthesis of nanoparticles driven by silica-encapsulated plasmonic heat sources

Fig. 4

a–f TEM images of silver nanoparticles synthesized in oleylamine (blue box). a, d using conventional heating, and (b, c, e, f), under photothermal conditions (b, e), with corresponding silica-encapsulated AuBPs decorated with the particles (c, f). Scale bars 50 nm. g–j Time-dependent (indicated by the brown arrow) TEM analysis of the AgNP formation (at the photothermal temperature of 130 °C) over the AuBP surface showing a gradual decrease in nanoparticle concentration on the surface: g, 30 min; h, 45 min; i, 2 h; and j, 3 h. Scale bars 50 nm. k TEM images of silver nanowires synthesized in ethylene glycol solvent (red box) under conventional heating with a small number of nanoparticles as a side product. l–m Silver nanowires synthesized under photothermal condition (l), with corresponding silica-encapsulated AuBPs m, decorated with silver nanoparticles produced as a byproduct. Scale bars for (k, l) 0.5 µm, and (m) 50 nm.

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