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Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

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Published on: December 16, 2016

Liquid crystal-driven interfacial ordering of colloidal microplastics: Advancing microplastic characterization below

Fiona Mukherjee¹, Anye Shi², Lourdes Aoi Latasa¹

¹Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.

Science Advances

|December 12, 2025

Summary

Researchers developed a new method to detect microplastics (MPs) in water using liquid crystals and computer vision. This technique can identify different plastic types even in complex environmental samples, aiding pollution monitoring.

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Sampling and Identification of Microplastics in Groundwater

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Published on: November 7, 2025

Area of Science:

Environmental Science
Materials Science
Analytical Chemistry

Background:

Detecting small plastic particles (microplastics or MPs) in the environment is difficult due to their size, varied surfaces, and presence of natural organic matter.
Current methods struggle to accurately characterize complex mixtures of MPs in environmental samples.

Purpose of the Study:

To develop an advanced method for characterizing mixtures of microplastics (MPs).
To leverage liquid crystal (LC)-aqueous interfaces for self-organization and detection of MPs.
To enable identification of MP composition in complex, weathered samples.

Main Methods:

Utilized spontaneous adsorption and self-organization of MPs at liquid crystal (LC)-aqueous interfaces.
Employed surface-sensitive interparticle interactions mediated by LCs to drive MP assembly.
Applied computer vision approaches for accurate recognition and classification of MP assembly patterns.

Main Results:

Demonstrated the ability to identify MP composition (polystyrene and polymethyl methacrylate) in complex samples containing natural organic matter and weathered MPs.
Showcased how computer vision methods classify MP samples, providing insights into colloidal dynamics at fluid interfaces.
Successfully recognized MP assembly patterns driven by LC-mediated interparticle interactions.

Conclusions:

The developed method advances the characterization of colloidal-scale MPs.
This approach offers a broadly accessible technique for MP detection, potentially usable by citizen scientists.
The findings contribute to understanding physical processes governing MP assembly at fluid interfaces.