Nucleation- and Emergence-Limited Growth of Ice from Pores
Nucleation- and Emergence-Limited Growth of Ice from Pores
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DOI：
10.1103/physrevlett.120.165701
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发表时间：
2018-04-16
影响因子：
8.6
通讯作者：
Christenson, Hugo K.
中科院分区：
文献类型：
--
作者：
Campbell, James M.;Christenson, Hugo K.
在大气气溶胶中，水蒸气的冰成核是由于过冷水在小孔中的凝结和冻结。在这里，我们使用云母上的楔形孔直接观察冰的生长之前，散装晶体的生长限制。我们报告了一个转变的行为随着温度的降低：在低温下，限制步骤不是成核，而是一个自由能垒与冰的生长通过一个狭窄的孔隙口，成为一个体相。
Nucleation of ice from vapor on atmospheric aerosols has been attributed to the condensation and freezing of supercooled water in small pores. Here we use wedge pores on mica to directly observe the growth of ice in confinement prior to the growth of bulk crystals. We report a transition in behavior with a decreasing temperature: At low temperatures, the limiting step is not nucleation but a free energy barrier associated with the growth of ice through a narrow pore mouth to become a bulk phase.