One-step fabrication of Au-Ag alloys and its application for catalysts and SERS sensors

In situ engineering of Au–Ag alloy embedded PEDOT nanohybrids at a solvent/non-solvent interface for the electrochemical enzyme-free detection of histamine

“…3e), corresponding to the (111) planes of the fcc Au-Ag alloy. 58,59 Additionally, Fig. 3e shows that alloy NPs adopt an icosahedral morphology with a multiple-twinned structure, which is frequently observed in fcc metallic NPs with a small size.…”

“…3f exhibits 5 diffraction rings corresponding to (111), ( 200), ( 220), (311), and (222) reflections of fcc Au or Ag, suggesting the polycrystalline nature of PEDOT/Au-Ag (1 : 3) alloy NPs. 59 The high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) image of a single PEDOT/Au-Ag alloy nanoparticle (Fig. 3g), and corresponding elemental mappings of C, Ag, Au, S, and O can be observed in Fig.…”

Research on a three-dimensional SERS substrate based on a CNTs/Ag@Au/SiO2 composite for detection of fipronil and imidacloprid pesticides

“…16 Wei et al synthesized Au-Ag nanoparticles using a one-step method. 17 Au nanoparticles were used as the core, and Ag shells were wrapped around the Au core. By adjusting the amount of AgNO 3 , the ratio of silver to gold in the core-shell structure was controlled.…”

A SERS Biosensor Based on Functionalized Au-SiNCA Integrated with a Dual Signal Amplification Strategy for Sensitive Detection of Telomerase Activity During EMT in Laryngeal Carcinoma

“…[18][19][20] Attributed to the lattice-matching characteristics of Au and Ag, researchers have proved that Au-Ag core-shell nanostructures have outstanding optical performance. [21][22][23] Among these, Au-Ag core-shell nanorods (Au-AgNRs), as an anisotropic nanostructure, have gained widespread attention due to their sharper plasma peaks and stronger interparticle near-field coupling effect. 24,25 In particular, Au-AgNRs with absorption in the near-infrared region has a higher penetration depth, providing deep tissue penetration that can be widely used for photothermal therapy or bioimaging.…”