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- W2188746868 abstract "This study examines structural variations found in the atomic ordering of different transition metal nanoparticles synthesized via a common, kinetically controlled protocol: reduction of an aqueous solution of metal precursor salt(s) with NaBH4 at 273 K in the presence of a capping polymer ligand. These noble metal nanoparticles were characterized at the atomic scale using spherical aberration-corrected scanning transmission electron microscopy (Cs-STEM). It was found for monometallic samples that the third row, face-centered-cubic (fcc), transition metal ((3M);Ir, Pt, and Au) particles exhibited more coherently ordered geometries than their second row, fcc, transition metal ((2M);Rh, Pd, and Ag) analogues. The former exhibit growth habits favoring crystalline phases with specific facet structures while the latter samples are dominated by more disordered atomic arrangements that include complex systems of facetsand twinning. Atomic pairdistribution function (PDF)measurements furtherconfirmed theseobservations, establishing that the3Mclusters exhibit longer ranged ordering than their 2M counterparts. The assembly of intracolumn bimetallic nanoparticles (AuAg, PtPd, and IrRh) using the same experimentalconditionsshowedastrongtendencyforthe3Matoms totemplate long-ranged,crystalline growthof2Mmetalatoms extendinguptoover 8 nm beyond the 3M core." @default.
- W2188746868 created "2016-06-24" @default.
- W2188746868 creator A5080335817 @default.
- W2188746868 date "2013-01-01" @default.
- W2188746868 modified "2023-09-24" @default.
- W2188746868 title "Metastability and Structural Polymorphism in Noble Metals: The Role of Composition and Metal Atom Coordination in Mono- and Bimetallic Nanoclusters" @default.
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