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New Particle Formation from the Vapor Phase: From Barrier-Controlled Nucleation to the Collisional Limit
Kayane K Dingilian1, Martina Lippe2, Jakub Kubečka3
1William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States.
The Journal of Physical Chemistry Letters
|May 10, 2021
Summary
Researchers studied vapor phase nucleation in carbon dioxide, bridging the gap between barrier-dominated and collisional limits. This provides a comprehensive view of new particle formation across diverse conditions.
Area of Science:
- Physical Chemistry
- Chemical Physics
- Thermodynamics
Background:
- Vapor phase nucleation studies often focus on two extremes: high free energy barrier nucleation or the negligible barrier collisional limit.
- Investigating the transition between these nucleation regimes, especially for weakly bound systems, presents significant experimental challenges.
Purpose of the Study:
- To explore and characterize the transition between barrier-dominated nucleation and the collisional limit in weakly bound systems.
- To provide new experimental data for new particle formation in carbon dioxide across a wide range of conditions.
Main Methods:
- Utilized complementary Laval expansion experiments to gather new particle formation data.
- Combined experimental data with a kinetic model incorporating rate constants from high-level quantum chemical calculations.
Main Results:
- Successfully bridged the gap between the nucleation barrier-dominated and collisional regimes.
- Generated comprehensive data on new particle formation in carbon dioxide under varied conditions.
Conclusions:
- The study provides a comprehensive picture of new particle formation during the transition from barrier-dominated nucleation to the collisional limit.
- The combined experimental and theoretical approach overcomes previous limitations in studying nucleation transitions.
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