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Characterization techniques for heterogeneous nucleation from the gas phase
Journal of Aerosol Science ( IF 4.5 ) Pub Date : 2021-09-14 , DOI: 10.1016/j.jaerosci.2021.105875
Paul M. Winkler 1 , Paul E. Wagner 1
Affiliation  

Heterogeneous nucleation constitutes the initial step in the formation of new aerosol particles that evolve on the surface of pre-existing (seed) particles. To this end the interaction of vapor and seed particle plays a critical role which is governed by the seed particle's size, composition, solubility, electrical charge state as well as the chemical nature of the vapor and the wetting properties of the condensing liquid with the underlying surface. Despite being a process on the nanoscale under most conditions of relevance the effect of heterogeneous nucleation has global implications via the formation of clouds, and is technically utilized in condensation particle counters for the detection of nanoparticles. Proper techniques for the characterization of heterogeneous nucleation thus serve a better fundamental understanding and improve the detectability of nanoparticles. Here we review state-of-the-art experimental and theoretical techniques allowing quantitative analysis of heterogeneous nucleation and providing insight to properties of nucleating clusters. Building upon current knowledge we identify and discuss open questions in the field motivating prospective future research.



中文翻译:

气相异相成核的表征技术

异质成核构成了新气溶胶粒子形成的初始步骤,这些粒子在预先存在的(种子)粒子的表面上演化。为此,蒸汽和种子颗粒的相互作用起着关键作用,这取决于种子颗粒的大小、组成、溶解度、电荷状态以及蒸汽的化学性质和冷凝液体与底层的润湿特性表面。尽管在大多数相关条件下是纳米级的过程,但异质成核的影响通过云的形成具有全球影响,并且在技术上用于冷凝粒子计数器以检测纳米粒子。因此,用于表征异质成核的适当技术有助于更好地理解和提高纳米粒子的可检测性。在这里,我们回顾了最先进的实验和理论技术,允许对异质成核进行定量分析,并提供对成核簇特性的深入了解。在当前知识的基础上,我们确定并讨论该领域中的开放性问题,以激发未来的研究。

更新日期:2021-09-20
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