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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Heterogeneous Freezing of Carbon Nanotubes: A Model System for Pore Condensation and Freezing in the Atmosphere
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Heterogeneous Freezing of Carbon Nanotubes: A Model System for Pore Condensation and Freezing in the Atmosphere

机译：碳纳米管的异质冻结：大气中孔隙凝结和冷冻模型系统

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摘要

Heterogeneous ice nucleation is an important mechanism for cloud formation in the upper troposphere. Recently, pores on atmospheric particles have been proposed to play a significant role in ice nucleation. To understand how ice nucleation occurs in idealized pores, we characterized the immersion freezing activity of various sizes of carbon nanotubes. Carbon nanotubes are used both as a model for pores and proxy for soot particles. We determined that carbon nanotubes with inner diameters between 2 and 3 nm exhibit the highest ice nucleation activity. Implications for the freezing behavior of porous materials and nucleation on soot particles will be discussed.
机译：异质冰成核是上层云形成的重要机制。 最近，已经提出了在大气颗粒上的孔在冰核中起着重要作用。 为了了解在理想化孔隙中发生冰核的情况，我们表征了各种碳纳米管的浸入冻结活性。 碳纳米管既用作孔颗粒的孔和代理的模型。 我们确定具有2至3nm的内径的碳纳米管显示出最高的冰核活性。 将讨论对多孔材料的冷冻行为和烟灰颗粒的凝聚力的影响。

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