Fabrication of Rh based solid-solution bimetallic alloy nanoparticles with fully-tunable composition through femtosecond laser irradiation in aqueous solution

Composition-controlled ternary Rh–Pd–Pt solid-solution alloy nanoparticles by laser irradiation of mixed solution of metallic ions

“…Similar tendency has been confirmed for the bimetallic case. 18 Although further investigation should be required, this may due to the differences of surface energy, interatomic distance, and atomic radius of Rh, Pd, and Pt played an important role in the reaction resulting in the different size of the prepared NPs. 22 The colloidal solutions remained dispersed for several days after irradiation depending on the fraction of Rh ions in the solution without any dispersants.…”

“…On the contrary, it is reported that electronic structures of these elements in a nanometer-sized particle retain, and therefore nanometersized particles have a favor to form homogeneous alloys and no rehybridization occurs due to band formation. 15 We have demonstrated binary Au-Ag, Au-Pt, Rh-Pd, and Rh-Pt, and ternary Au-Ag-Pt [16][17][18][19] NPs formation with fully tunable compositions by femtosecond laser irradiation of mixed ion solutions. In the case of tightly focused femtosecond laser irradiation in a solution, nonlinear optical processes such as multiphoton absorption and avalanche ionization can take place due to high photon density of strongly focused beam in a condensed matter.…”

“…Based on our successful preparation of binary Rh-Pd and Rh-Pt alloy NPs, 18 we extended our approach toward the synthesis of ternary Rh-Pd-Pt alloy NPs in this study. The morphology, crystal structure, elemental composition, and electronic state of fabricated NPs were evaluated by means of TEM, XRD, EDS, and XPS.…”

Nonlinear optical properties of Rh–Pd and Rh–Pt solid-solution alloy nanoparticles prepared by a laser-induced nucleation method in aqueous solution

“…Irradiation time was set for 30 min. The details of the synthesis procedure have been reported elsewhere [24]. Size and shape of fabricated particles were obtained by a transmission electron microscope (TEM; JEOL, JEM2000EXII) observation operated at 200 kV.…”

“…We had demonstrated the formation of solid-solution alloy NPs with tunable compositions by laser-induced nucleation method. In the method, alloy NPs were easily formed by high-intensity femtosecond irradiation of metallic ion solutions with different mixing ratios [24][25][26]. The main objective of this research is to study the third order nonlinear optical properties of Rh-Pd and Rh-Pt NPs synthesized through the laser-induced nucleation method.…”