50 citations · 254 across the 17 of their papers we have counts for
17 papers
Localized elasticity governs the nonlinear rheology of colloidal supercooled liquids
Dejia Kong, Wei-Ren Chen, Ke-Qi Zeng +2
We propose a microscopic picture for understanding the nonlinear rheology of supercooled liquids with soft-repulsive potentials. Based on Brownian dynamics simulations of supercool…
Size and shape fluctuations of ultrasoft colloids
Huarui Wu, Jing Song, Wei-Ren Chen +3
Ultrasoft colloidal particle fluctuates due to its flexibility. Such fluctuation is essential for colloidal structure and dynamics, but is challenging to quantify experimentally. W…
Experimental Search for Non-Newtonian Forces in the Nanometer Scale with Slow Neutrons
Y. Kamiya, R. Cubitt, L. Porcar +3
Improved limits for new gravity-like short-range interactions, in which a scattering potential is modeled by the Yukawa-type parametrization, have been obtained by measuring the an…
A Novel Experimental Approach for Nanostructure Analysis: Simultaneous Small Angle X-ray and Neutron Scattering (SAXS/SANS)
Ezzeldin Metwalli, Klaus Götz, Sebastian Lages +14
Exploiting small angle X-ray and neutron scattering (SAXS/SANS) on the same sample volume at the same time provides complementary nanoscale structural information at two different…
Microstructural understanding of the length and stiffness dependent shear thinning in semi-dilute colloidal rods
Christian Lang, Joachim Kohlbrecher, Lionel Porcar +4
Complex fluids containing low concentrations of slender colloidal rods can display a high viscosity, while little flow is needed to thin the fluid. This feature makes slender rods…
Kinky DNA in solution: Small angle scattering study of a nucleosome positioning sequence
Torben Schindler, Adrián González, Ramachandran Boopathi +10
DNA is a flexible molecule, but the degree of its flexibility is subject to debate. The commonly-accepted persistence length of Å is inconsistent with recent stu…
Scaling Behavior of Anisotropy Relaxation in Deformed Polymers
Christopher N. Lam, Wen-Sheng Xu, Wei-Ren Chen +12
Drawing an analogy to the paradigm of quasi-elastic neutron scattering, we present a general approach for quantitatively investigating the spatiotemporal dependence of structural a…
Dynamically Correlated Region in Sheared Colloidal Glasses Revealed by Neutron Scattering
Zhe Wang, Takuya Iwashita, Lionel Porcar +6
The microscopic deformation mechanism of charged colloidal glasses with extended-range interactions under shear is investigated by in-situ small-angle neutron scattering, and a dyn…
Dynamic Equivalence between Soft Star Polymers and Hard Spheres
Zhe Wang, Antonio Faraone, Panchao Yin +5
Understanding the dynamics of soft colloids, such as star polymers, dendrimers, and microgels, is of scientific and practical importance. It is known that the excluded volume effec…
Fingerprinting molecular relaxation in deformed polymers
Zhe Wang, Christopher N. Lam, Wei-Ren Chen +8
The flow and deformation of macromolecules is ubiquitous in nature and industry, and an understanding of this phenomenon at both macroscopic and microscopic length scales is of fun…
Local Elasticity in Nonlinear Rheology of Interacting Colloidal Glasses Revealed by Neutron Scattering and Rheometry
Zhe Wang, Takuya Iwashita, Lionel Porcar +7
The flow of colloidal suspensions is ubiquitous in nature and industry. Colloidal suspensions exhibit a wide range of rheological behavior, which should be closely related to the m…
The connection between shear thinning and biaxial orientation for quasi-ideal rods
Christian Lang, Joachim Kohlbrecher, Lionel Porcar +1
The complete orientational ordering tensor of quasi-ideal colloidal rods is obtained as a function of shear rate by performing rheo-SANS (rheology with small angle neutron scatteri…
Magnetic nano-fluctuations in a frustrated magnet
Krunoslav Prsa, Mark Laver, Martin Mansson +18
Frustrated systems exhibit remarkable properties due to the high degeneracy of their ground states. Stabilised by competing interactions, a rich diversity of typically nanometre-si…
Influence of Molecular Solvation on the Conformation of Star Polymers
Xin Li, Lionel Porcar, Luis E. Sánchez-Diáz +7
We have used neutron scattering to investigate the influence of concentration on the conformation of a star polymer. By varying the contrast between the solvent and isotopically la…
Dynamical Crossover in Soft Colloids below the Overlap Concentration
Xin Li, Luis E. Sánchez-Diáz, Bin Wu +8
The dynamics of soft colloids in solutions is characterized by internal collective motion as well as center-of-mass diffusion. Using neutron scattering we demonstrate that the comp…
Learning about SANS Instruments and Data Reduction from Round Robin Measurements on Samples of Polystyrene Latex
Adrian R. Rennie, Maja S. Hellsing, Kathleen Wood +12
Measurements of a well-characterised standard sample can verify the performance of an instrument. Typically, small-angle neutron scattering instruments are used to investigate a wi…
A Novel Method for Studying the Dynamics of Confined Polymers in Nanoparticles in Nanoblends
Fabrice Cousin, Jérémie Gummel, Daniel Clemens +2
The advances in new technologies have prompted the need for functional systems smaller than the gyration radius of polymer chains. Thus, understanding how nanoconfinement affects p…