TY - JOUR
T1 - Observation of quasimelting at the atomic level in Au nanoclusters
AU - Krakow, W.
AU - Jóse-Yacamán, M.
AU - Aragón, J. L.
PY - 1994
Y1 - 1994
N2 - Experimental evidence is presented for the atomic origin of quasimelting of small Au clusters. Real-time high-resolution transmission electron microscopy, an in situ evaporation facility, and the choice of a controlled substrate clearly shows atomic motion adjacent to and on nanoclusters in the <20 size range. We have been able to observe partial melting, atom sharing, absorption of small clusters, and shape adjustment. These phenomena are consistent with low-energy surface sputtering, energy minimization, and diffusive surface migration. Related to the transformation from icosahedral multiply twinned to single crystal observed under low voltage conditions, we propose a geometric model of the transformation which produces a continuum of low-energetic intermediate structures.
AB - Experimental evidence is presented for the atomic origin of quasimelting of small Au clusters. Real-time high-resolution transmission electron microscopy, an in situ evaporation facility, and the choice of a controlled substrate clearly shows atomic motion adjacent to and on nanoclusters in the <20 size range. We have been able to observe partial melting, atom sharing, absorption of small clusters, and shape adjustment. These phenomena are consistent with low-energy surface sputtering, energy minimization, and diffusive surface migration. Related to the transformation from icosahedral multiply twinned to single crystal observed under low voltage conditions, we propose a geometric model of the transformation which produces a continuum of low-energetic intermediate structures.
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U2 - 10.1103/PhysRevB.49.10591
DO - 10.1103/PhysRevB.49.10591
M3 - Article
AN - SCOPUS:0001375957
SN - 0163-1829
VL - 49
SP - 10591
EP - 10596
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 15
ER -