Journal ArticleSoft matter · July 2024
We study the local dynamics of a thixotropic yield stress fluid that shows a pronounced non-monotonic flow curve. This mechanically unstable behavior is generally not observable from standard rheometry tests, resulting in a stress plateau that stems from t ...
Full textCite
Journal ArticleJournal of Rheology · May 1, 2024
Knowledge of the evolution in the mechanical properties of a curing polymer matrix is of great importance in composite parts or structure fabrication. Conventional rheometry, based on small amplitude oscillatory shear, is limited by long interrogation time ...
Full textCite
Journal ArticlePhysical Review Fluids · November 1, 2023
This paper is associated with a video winner of a 2022 APS/DFD Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2022. ...
Full textCite
Journal ArticleNature Physics · August 1, 2023
Soft particulate gels are composed of a small amount of particulate matter dispersed in a continuous fluid phase. The solid components assemble to form a porous matrix, providing rigidity and control of the mechanical response, despite being the minority c ...
Full textCite
Journal ArticleFood Hydrocolloids · February 1, 2022
We investigated the gelation characteristics of aiyu jelly derived from the polymeric extract obtained by washing the seeds of Ficus Pumila var. Awkeotsang. The main gel component is low methoxyl pectin, which forms crosslinks with divalent ions that bind ...
Full textCite
Journal ArticleProceedings of the National Academy of Sciences of the United States of America · April 2021
Colloidal gels result from the aggregation of Brownian particles suspended in a solvent. Gelation is induced by attractive interactions between individual particles that drive the formation of clusters, which in turn aggregate to form a space-spanning stru ...
Full textCite
Journal ArticleNature nanotechnology · April 2021
Small-molecule self-assembly is an established route for producing high-surface-area nanostructures with readily customizable chemistries and precise molecular organization. However, these structures are fragile, exhibiting molecular exchange, migration an ...
Full textCite
Journal ArticleJournal of Rheology · September 1, 2020
Featured Publication
An experimental protocol is developed to directly measure the new material functions revealed by medium amplitude parallel superposition (MAPS) rheology. This protocol measures the medium amplitude response of a material to a simple shear deformation compo ...
Full textCite
Journal ArticlePhysical Review Fluids · October 24, 2019
This paper is associated with a poster winner of a 2018 APS/DFD Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available from the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2018.GFM.P0045. ...
Full textCite
Journal ArticlePhysical Review X · December 6, 2018
Featured Publication
The ability to measure the bulk dynamic behavior of soft materials with combined time and frequency resolution is instrumental for improving our fundamental understanding of connections between the microstructural dynamics and the macroscopic mechanical re ...
Full textCite
Journal ArticleJournal of Rheology · July 1, 2018
We use molecular dynamics simulations to investigate the linear viscoelastic response of a model three-dimensional particulate gel. The numerical simulations are combined with a novel test protocol (the optimally windowed chirp or OWCh), in which a continu ...
Full textCite
Journal ArticleJournal of Fluid Mechanics · December 25, 2017
Featured Publication
We present the results of a combined experimental and theoretical study of drop coalescence in the presence of an initial temperature difference ΔT0 between a drop and a bath of the same liquid. We characterize experimentally the dependence of the residenc ...
Full textCite
Journal ArticleJournal of Rheology · May 1, 2017
Featured Publication
The effect of thermal and shear history on the rheology of waxy crude oils is studied in detail. A protocol sequence is presented, which enables us to systematically extract the main thixotropic features of a model waxy oil by a series of steady state and ...
Full textCite
Journal ArticleProceedings of the National Academy of Sciences of the United States of America · September 2014
Separation of cells is a critical process for studying cell properties, disease diagnostics, and therapeutics. Cell sorting by acoustic waves offers a means to separate cells on the basis of their size and physical properties in a label-free, contactless, ...
Full textCite