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silver and copper to form local icosahedral structures in a bulk glass |
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differs from our observations on nanoparticles. |
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|
|
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+ |
|
| 261 |
|
\begin{figure}[htbp] |
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\centering |
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+ |
\begin{tabular}{c c c} |
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\includegraphics[width=2.1in]{images/Cu_Ag_random_30A_liq_icosonly.pdf} |
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\includegraphics[width=2.1in]{images/Cu_Ag_random_30A__0007_icosonly.pdf} |
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+ |
\includegraphics[width=2.1in]{images/Cu_Ag_random_30A_glass_icosonly.pdf} |
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+ |
\end{tabular} |
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+ |
\caption{Appearance of icosahedral clusters ($\hat{W}_6<0.15$) at 900 K, 471 K and 315 K for the 30 \AA\ nanoparticle cooled at the slower cooling rate. Silver atoms (blue) mostly exhibit icosahedral order at the surface whereas clusters of Copper atoms (green) with icosahedral order are distributed throughout the nanoparticle and increase in size with decreasing temperature.} |
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+ |
\label{fig:icoscluster} |
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+ |
\end{figure} |
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+ |
|
| 272 |
+ |
|
| 273 |
+ |
\begin{figure}[htbp] |
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\centering |
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\includegraphics[width=5in]{images/dens_fracr_stacked_plot.pdf} |
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\caption{Appearance of icosahedral clusters around central silver atoms |
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is largely due to the presence of these silver atoms at or near the |
