Abstract
The melting and freezing behavior of small connected and isolated Bi particles embedded in a SiO 2 matrix has been studied as a function of the mean particle size. Melting temperatures have been found to be strongly reduced with decreasing particle size, consistent with a r −1 type behavior as predicted by a number of theoretical approaches to the solid-liquid melting transition. When the freezing behavior of these particles was studied large undercoolings were found. In addition, strong fluctuations in the freezing time were observed in isothermal measurements at large undercoolings below the bulk Bi freezing temperature.
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