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Related Experiment Video

Updated: Oct 17, 2025

High Throughput Analysis of Liquid Droplet Impacts

High Throughput Analysis of Liquid Droplet Impacts

Published on: March 6, 2020

Chemical Reactions at the Interface Periphery of Colliding Droplets Studied by Raman Image Analysis.

Shuhei Suzuki¹, Aya Kamoshita¹, Jun-Ya Kohno¹

¹Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.

The Journal of Physical Chemistry. A

|October 13, 2021

Summary

Collision of sulfuric acid and ammonia droplets reveals new reaction interfaces. Product concentrations suggest a dynamic interface, not simple diffusion, impacting solution reaction understanding.

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Published on: January 11, 2018

Area of Science:

Chemical Kinetics
Solution Chemistry
Interface Science

Background:

Understanding solution reactions requires knowledge of interfacial chemical processes.
Droplet collisions create dynamic interfaces crucial for reaction kinetics.

Purpose of the Study:

To investigate chemical reactions occurring at the interface of colliding aqueous droplets.
To quantify reaction extent and compare it with diffusion models.

Main Methods:

Utilized Raman spectroscopy and imaging to analyze light scattered from the interface of colliding H2SO4 and NH3 droplets.
Measured product concentration at the droplet interface.

Main Results:

Observed product concentrations were lower than predicted by a simple diffusion model.
Identified the formation of a fresh interface at the periphery of the mixing zone.

Conclusions:

The dynamic interface generated during droplet collision influences reaction outcomes.
This method offers a novel approach for studying rapid interfacial reactions in solutions.