Matches in SemOpenAlex for { <https://semopenalex.org/work/W1987103726> ?p ?o ?g. }
- W1987103726 abstract "Fused silica substrates were implanted with $2ifmmodetimeselsetexttimesfi{}{10}^{17}phantom{rule{0.3em}{0ex}}{mathrm{In}}^{2+}∕{mathrm{cm}}^{2}$ ions at $320phantom{rule{0.3em}{0ex}}mathrm{keV}$. Indium crystalline nanoclusters with an average size of about $15--20phantom{rule{0.3em}{0ex}}mathrm{nm}$ were found in the as-implanted samples. The thermal behavior of the nanoclusters was studied by performing heating-cooling cycles in vacuum and by using in-situ techniques based on glancing-incidence x-ray diffraction and transmission electron microscopy. The precipitates showed both superheating and supercooling. Moreover, no evidence of clusters growth or reorientation during the thermal cycle was found. A detailed study of the heating sequence showed that the melting temperature of the Indium precipitates depended on their size, i.e., the smallest particles melt first and at a temperature which is about $7phantom{rule{0.3em}{0ex}}mathrm{K}$ below the bulk melting point, while the largest ones were superheated until about $13phantom{rule{0.3em}{0ex}}mathrm{K}$ above it. Moreover, a remarkable stability of the In cluster well above their melting temperature (up to about $980phantom{rule{0.3em}{0ex}}mathrm{K}$) was evidenced by in-situ transmission electron microscopy analysis. From a thermodynamic point of view, the experimental results were explained by considering two effects acting on the clusters: the thermodynamic size effect and the pressure of the silica matrix." @default.
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- W1987103726 date "2004-08-01" @default.
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- W1987103726 title "Thermal behavior of indium nanoclusters in ion-implanted silica" @default.
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- W1987103726 doi "https://doi.org/10.1103/physrevb.70.075418" @default.
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