Table 3.
Summary of the main Ag-Au bimetallic NPs structures: synthesis techniques, size and shape.
| Alloy/Core@shell | Shape | Synthesis Technique | Size (nm) | Ref. |
|---|---|---|---|---|
| AgAu alloy | Spherical | Chemical co-reduction of HAuCl4 and AgNO3 with sodium citrate | 10–25 (0.27 < %Au < 1.00) |
[144] |
| AgAu alloy | Spherical | Simultaneous laser ablation of Ag and Au colloids | 5–50 | [145] |
| AgAu alloy | Spherical | Metal evaporation on glass support and annealing (500 °C) | 20–50 | [146] |
| AgAu alloy | Spherical | UV laser radiation (193 nm) on silicate glass | 5–40 | [147] |
| AgAu alloy | Spherical core/alloy/shell |
Sodium citrate reduction of Ag+ on AuNPs and hydrothermal treatment | 16–26 (T = 120 °C) 16–23 (T = 160 °C) |
[148] |
| AgAu alloy | Elliptical (quasi-spherical) |
Metal evaporation on glass support and annealing (350 °C) | Vertical radius: 4–12 Horizontal radius: 6–15 |
[149] |
| AgAu alloy | Nanoprisms (NPrs) | Nanosphere lithography and film deposition by thermal evaporation on a glass | 150 (length) 50 (height) |
[150] |
| Ag@Au core@shell |
Spherical | Laser ablation of Au in a suspension of Ag colloids | 30 (Ag core) 0.5–4 (Au shell) |
[53] |
| Ag@Au core@shell |
Nanoplates (NPls) | Electrodeposition of Au shell on Ag nanoplates (AgNPls) | 50 (Ag core) 0.5 (Au shell) |
[151] |
| Ag@Au core@shell |
Hemispherical NPls | Cycles of electrodeposition of Au shell on AgNPls supported on ITO glass | 100 (Ag core: width) 40 (Ag core: height) 1 (Au shell–20 cycles) |
[152] |
| Ag@Au core@shell |
Triangular nanoprisms (TNPrs) | Chemical reduction of HAuCl4 by AA with PVP on silver TNPrs (AgTNPrs) by slow addition of HAuCl4 solution | 60 (Ag core) 1 (Au shell) |
[153] |
| Au@Ag core@shell |
Spherical | Deposition of Ag (chemical reduction) on AuNPs | 10–15 (Au core) 1–10 (Ag shell) 30 (Au core)1–9 (Ag shell) |
[40] |
| Au@Ag core@shell |
Nanorods (NRs) | Sodium citrate and AA reduction of AgNO3 on AuNRs | 35 (Au core: length) 10 (Au core: width) 1–6 (Ag shell) |
[154] |
| Au@Ag core@shell |
NRs | Chemical reduction of AgNO3 with AA on seed-mediated grown in NaBH4 on AuNRs | 60 (Au core: length) 30 (Au core: width) 1–3 (Ag shell) |
[155] |
| Au@Ag core@shell |
NRs | Chemical reduction of AgNO3 with AA on seed-mediated grown in NaBH4 on AuNRs | 60 (Au core: length) 20 (Au core: width) 4 (Ag shell) |
[156] |
| Au@Ag(@Au) core@shell |
TNPrs | Sodium citrate and AA reduction of AgNO3 on seed-mediated grown AuNPs supported on an ITO glass (followed by electrodeposition of a thin Au layer) | Initial Au@Ag TNPrs 30 (height) Au shell very thin when it is present |
[157] |