The versatility of Fe(II) in the synthesis of uniform citrate-stabilized plasmonic nanoparticles with tunable size at room temperature

Core–shell nanoheterodimers: laser-assisted deposition of single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots on TiO2 nanoparticles

“…21,53–55 The Pd shell also has a strong damping effect on the dipole plasma oscillation of the Au core; adding even a thin Pd shell is indeed known to nearly suppress the SPR peak of the Au core in the Au@Pd core–shell BNDs. 56,57…”

“…21,[53][54][55] The Pd shell also has a strong damping effect on the dipole plasma oscillation of the Au core; adding a Pd shell even thin is indeed known to nearly suppress the SPR peak of the Au core in the Au@Pd core-shell BNDs. 56,57 Please do not adjust margins Please do not adjust margins non-negligible lattice constant mismatch (4.64 %) between Au and Pd, which first allows selective epitaxial growth of palladium on the Au NDs but then generates interfacial strains which prevent the continuous formation of a uniform shell (Figure 11e and Figure 11g (red arrows)). 30,58 This observed growth is coherent with the intermediate Stranski-Krastanov mode, which describes the growth of a thin layer becoming more and more irregular due to interfacial strain and explains why we deduced non-integer mean shell thicknesses at completion and why they are so thin when grown from electrons internally provided by the excitation of TiO 2 NPs; the high value of the surface energy strongly influences the 𝛾𝐴𝑢 𝑃𝑑 electron transfer at the Au/Pd interface.…”

Fabrication of Extremely Concentrated Silver Hydrosols without Additional Stabilizers

“…It is also worth mentioning the very recent synthesis of a variety of citrate-stabilized nanoparticles of precious metals using iron(II) as a reducing agent. 42 The studies conducted with the Carey Lea colloidal solutions after their dilution have suggested 33−36 that the Ag NPs negatively charged due to citrate anion adsorption obey the DLVO model; the reasons for the unusual stability of the dense sols remain elusive. Recently, we found 39−41 that the species adsorbed on the Ag NP surfaces are actually the products of citrate decomposition comprising an alcohol group and one or two carboxylates, in contrast to three carboxylic groups in citrate anions, and very minor ferric hydroxides.…”

“…Studies targeted at optimization of characteristics of the colloids are rare; for example, the homogeneous nanoparticles of about 20 nm have been reported to be produced with enhanced concentration of citrate (molar ratio AgNO 3 /FeSO 4 /Na 3 Cit of 1.0:1.8:4.8). It is also worth mentioning the very recent synthesis of a variety of citrate-stabilized nanoparticles of precious metals using iron­(II) as a reducing agent . The studies conducted with the Carey Lea colloidal solutions after their dilution have suggested − that the Ag NPs negatively charged due to citrate anion adsorption obey the DLVO model; the reasons for the unusual stability of the dense sols remain elusive.…”

Synthesis and Structural Characterization of Branched Bimetallic AuPd Nanoparticles with a Highly Tunable Optical Response

“…Following successful control in synthesizing spherical AuPd NPs that exhibit improved or novel properties, − researchers have turned their attention to developing anisotropic AuPd NPs. These particles can take advantage of the shape-dependent optical response of Au while allowing for control of the exposed crystallographic facets, which is crucial for catalytic properties …”