How volatile components catalyze vapor nucleation
| Autor: | Martina Lippe, Chenxi Li, Jan Krohn, Ruth Signorell |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science 010504 meteorology & atmospheric sciences Vapor pressure Nucleation macromolecular substances 010402 general chemistry 01 natural sciences environment and public health Gas phase Quantitative assessment Chemical composition Physics::Atmospheric and Oceanic Physics Research Articles 0105 earth and related environmental sciences Multidisciplinary Chemical Physics Component (thermodynamics) technology industry and agriculture SciAdv r-articles 0104 chemical sciences 13. Climate action Chemical physics Physical Sciences health occupations Research Article |
| Zdroj: | Science Advances Science Advances, 7 (3) |
| ISSN: | 2375-2548 |
| Popis: | Molecular studies reveal how new particle formation in multicomponent vapors is enhanced by transient hetero-molecular clusters. Gas phase nucleation is a ubiquitous phenomenon in planetary atmospheres and technical processes, yet our understanding of it is far from complete. In particular, the enhancement of nucleation by the addition of a more volatile, weakly interacting gaseous species to a nucleating vapor has escaped molecular-level experimental investigation. Here, we use a specially designed experiment to directly measure the chemical composition and the concentration of nucleating clusters in various binary CO2-containing vapors. Our analysis suggests that CO2 essentially catalyzes nucleation of the low vapor pressure component through the formation of transient, hetero-molecular clusters and thus provides alternative pathways for nucleation to proceed more efficiently. This work opens up new avenues for the quantitative assessment of nucleation mechanisms involving transient species in multicomponent vapors. |
| Databáze: | OpenAIRE |
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