Pregled bibliografske jedinice broj: 938392
Ag-Au nanoclusters: Structure and phase segregation
Ag-Au nanoclusters: Structure and phase segregation // Applied Physics Letters, 99 (2011), 17; 171914, 4 doi:10.1063/1.3656244 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 938392 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Ag-Au nanoclusters: Structure and phase segregation
Autori
Belić, D. ; Chantry, R. L. ; Li, Z. Y. ; Brown, S. A.
Izvornik
Applied Physics Letters (0003-6951) 99
(2011), 17;
171914, 4
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
nanoparticles, diffusion, gold, transmission electron microscopy, silver, oxidation, aggregation, phase segregation, nanostructures, catalysis
Sažetak
We present a systematic survey of unprotected Ag-Au nanoclusters prepared by inert gas aggregation. The clusters are initially fully and homogeneously alloyed, exhibiting icosahedral and decahedral structural motifs. Imaging using scanning transmission electron microscopy indicates that over a period of up to 2 yr, the nanoclusters undergo structural transitions into phase-segregated core-shell and Janus particles with Ag-Au cores and AgxO shells. Larger Janus particles undergo a ripening process which results in division into separate Ag-Au-rich and Ag2O-rich particles. We propose that oxidation of the Ag component and subsequent diffusion of AgxO are responsible for the observed phenomena.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
