Publications by authors named "Yvonne Zagzag"
Director Response of Liquid Crystals in Spatially Varying Magnetic Fields with Antagonistic Anchoring Conditions.
ACS Appl Mater Interfaces
December 2024
Article Synopsis
- In the presence of a magnetic field, liquid crystal directors can be distorted from their stable state, influenced by the combinations of liquid crystal elasticity and surface anchoring.
- The research outlines a method to achieve spatially complex distortions by utilizing high-permeability ferromagnetic microstructures embedded in nematic liquid crystals, which create distinct magnetic field patterns.
- The study includes simulations that illustrate how variations in magnetic field shape affect the liquid crystal director's orientation, enabling the design of customized microstructures for specific liquid crystal patterns.
We demonstrate that holographic particle characterization can directly detect binding of proteins to functionalized colloidal probe particles by monitoring the associated change in the particles' size. This label-free molecular binding assay uses in-line holographic video microscopy to measure the diameter and refractive index of individual probe spheres as they flow down a microfluidic channel. Pooling measurements on 10 particles yields the population-average diameter with an uncertainty smaller than 0.
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