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Evaporation and Molecular Beam Scattering from a Flat Liquid Jet
Chin Lee1,2, Marvin N Pohl1,2, Isaac A Ramphal1,2
1Department of Chemistry, University of California, Berkeley, California 94720, United States.
The Journal of Physical Chemistry. A
|May 17, 2022
Summary
Researchers developed a new molecular beam scattering instrument to study gas-liquid reactions. This setup uses a flat liquid sheet to investigate evaporation and scattering dynamics for volatile liquids.
Area of Science:
- Physical Chemistry
- Surface Science
- Chemical Physics
Background:
- Studying reactions at gas-liquid interfaces is crucial for understanding chemical processes.
- Volatile liquids present unique challenges for surface reaction studies due to evaporation.
- Existing molecular beam techniques are not ideally suited for investigating liquid surfaces.
Purpose of the Study:
- To develop and characterize an experimental setup for molecular beam scattering from flat liquid sheets.
- To investigate the evaporation dynamics of volatile liquids.
- To study the scattering of molecules from liquid surfaces.
Main Methods:
- Adaptation of a crossed molecular beam instrument for liquid jet scattering.
- Utilizing a microfluidic chip to generate a stable, flat liquid sheet in vacuum.
- Employing a rotatable mass spectrometer to measure product time-of-flight distributions for evaporation and scattering.
Main Results:
- Successful characterization of evaporation and scattering from a dodecane flat jet.
- First measurements of Ne and dodecane evaporation from a Ne-doped dodecane flat jet.
- First measurements of Ne scattering from a pure dodecane flat jet.
Conclusions:
- The developed experimental setup is capable of studying gas-liquid interface dynamics.
- The instrument provides insights into evaporation and scattering processes at liquid surfaces.
- This technique opens new avenues for investigating reactions at gas-liquid interfaces.
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