Lisa Tran

Shaping boundaries to control and transport topological defects in colloidal nematic liquid crystals

Gerardo Campos-Villalobos, André F. V. Matias, Ethan I. L. Jull, Lisa Tran et autres

Anisotropic rodlike particles form liquid crystalline phases with varying degrees of orientational and translational order. When confined geometrically, these phases can give rise to topological defects, which can be selected and controlled by tuning how the rods align near boundaries, known as …

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Controlling viscosity to engineer focal conic domains in photonic cellulose nanocrystal films

Diogo V. Saraiva, Lotte Polling, Ivo R. Vermaire, Sander J. W. Vonk et autres

Cellulose nanocrystals (CNCs) form cholesteric architectures that can have color specific reflectivity and enable sustainable photonic films. However, achieving uniform color, suppressing iridescence, and accessing ordered defect structures such as focal conic domains remain challenging. Here, we control the photonic properties of …

Connecting research and community: a methodological framework for investigating CMV transmission in childcare settings

Karen Del’Olio, Anne Geiger, Lauren Christine Howe, Delaney Platia et autres

The CMV Transmission and Immune Tracking (TransmIT) Study was developed to address critical gaps in understanding of cytomegalovirus (CMV) transmission dynamics in early education and care (EEC) settings. This two-stage, community-engaged study design integrates EEC center partnerships, digital study platforms, and data …

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Curvature-directed anchoring and defect structure of colloidal smectic liquid crystals in confinement

Ethan I. L. Jull, Gerardo Campos-Villalobos, Qianjing Tang, Marjolein Dijkstra et autres

Rod-like objects at high packing fractions can exhibit liquid crystalline ordering. By controlling how the rods align near a boundary, i.e. the anchoring, the defects of a liquid crystal can be selected and tuned. For smectic phases, the rods break rotational and …

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Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Cellulose Nanocrystals Plant-derived, cellulose nanocrystals (CNCs) are abundant nanoparticles that can helically stack and form structural color (background polarized image, inset electron micrograph). In article number 2400104, Lisa Tran and co-workers show through surface-modification with a single surfactant, CNCs can be dispersed …

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Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant‐derived, cellulose nanocrystals (CNCs) mimic these features by self‐assembling into a …

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Flexible, photonic films of surfactant-functionalized cellulose nanocrystals for pressure and humidity sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant-derived, cellulose nanocrystals (CNCs) mimic these features by self-assembling into a …

Microbiological analysis of foods to assess suitability for the neutropenic diet at a major teaching hospital in South Australia

Trinity Gulliver, Evangeline Mantzioris, Panagiotis S. Konstantopoulos, Lisa Tran et autres

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Curvature directed anchoring and defect structure of colloidal smectic liquid crystals in confinement

Ethan I. L. Jull, Gerardo Campos-Villalobos, Qianjing Tang, Marjolein Dijkstra et autres

Rod-like objects at high packing fractions can form smectic phases, where the rods break rotational and translational symmetry by forming lamellae. Smectic defects thereby include both discontinuities in the rod orientational order (disclinations), as well as in the positional order (dislocations). In …

Helfrich-Hurault elastic instabilities driven by geometrical frustration

Christophe Blanc, Guillaume Durey, Randall D. Kamien, Teresa López‐León et autres

The Helfrich-Hurault instability is a well-known mechanism behind the undulations that occur as a result of strain upon liquid crystal systems with periodic ground states. In this review, the Helfrich-Hurault elastic instability is examined with a focus on layered liquid crystals that …

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Topological defects with a half twist

Lisa Tran

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Convection Confounds Measurements of Osmophoresis for Lipid Vesicles in Solute Gradients

Yang Gu, Lisa Tran, Soo-Jung Lee, Jiayu Zhang et autres

Lipid vesicles immersed in solute gradients are predicted to migrate from regions of high to low solute concentration due to osmotic flows induced across their semipermeable membranes. This process─known as osmophoresis─is potentially relevant to biological processes such as vesicle trafficking and cell …

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