Synthesis of Near-Monodispersed Au–Ag Nanoalloys by High Intensity Laser Irradiation of Metal Ions in Hexane

Enhanced catalytic activity of inhomogeneous Rh-based solid-solution alloy nanoparticles

“…The details of the fabrication mechanism have been reported previously. [27][28][29][30][31][32] TEM images of the as-prepared NPs of Rh, Pd, Pt, RhPd, RhPt, and RhPdPt are shown in Fig. 1 STEM-EDS elemental mapping was performed to evaluate the distribution of elements in the alloy NPs fabricated in the mixed solutions.…”

“…Although it has been reported that NPs composed of immiscible metals tend to form solid solutions, 25 a special technique is still required for ensuring that the solid-solution alloys are homogeneous, even with the chemical reduction method. 26 Recently, we successfully demonstrated the formation of homogeneous solid-solutions of binary [27][28][29][30] and ternary alloy NPs 31,32 with fully tunable compositions using tightly focused femtosecond laser irradiation of mixed solutions containing metallic ions in an atmospheric pressure at room temperature, without using any reducing agents or complicated procedures. In a laser-induced highly intense optical eld, solvated electrons and hydrogen radicals are created via the optical decomposition of water molecules.…”

Spectroscopic monitoring on irradiation-induced formation of AuAg alloy nanoparticles by femtosecond laser

“…By recording the changes in the absorbance as the reaction time increases, the kinetic change in the solution can be followed to reveal the formation stages in the nanoparticles synthesis. We have demonstrated that the femtosecond laser can be used to synthesize pure Au [6], Ag [7] nanoparticles and their multi-component system (binary and ternary) via reduction process of the corresponding metal ion solutions [8,9]. The reduction process is governed by solvated electrons and hydrogen radicals as reducing species generated through the multiphoton excitation and ionization of solvent molecules by femtosecond laser [10].…”

Applications of Shaped Femtosecond near-IR Laser Irradiation in the Generation of Metal Nanoparticles

“…Laser irradiation methods such as ablation and photoreduction of precursor solutions have been used effectively to produce transition metal particles and alloys [1][2][3]. Plasmonic nanoparticles such as gold and silver are among the most extensively studied nanomaterials and thus serve as a benchmark to evaluate general methodologies for formation and stabilization of metal nanoparticles.…”