38 citations · 204 across the 30 of their papers we have counts for
18 papers · 1 filter
Surfing, sweeping, and assembly of particles by a moving liquid crystal phase boundary
Tom Shneer, Jocelyn Ochoa, Alauna C. Wheeler +5
Non-equilibrium transport of particles embedded in a liquid crystal host can, by cooling through a phase transition, be exploited to create a remarkable variety of structures inclu…
Effect of confinement on the mechanics of a swelling hydrogel bead
Chaitanya Joshi, Mathew Q. Giso, Jean-François Louf +2
We recast the problem of hydrogel swelling under physical constraints as an energy optimization problem. We apply this approach to compute equilibrium shapes of hydrogel spheres co…
Morpho -- A programmable environment for shape optimization and shapeshifting problems
Chaitanya Joshi, Daniel Goldstein, Cole Wennerholm +6
An emerging theme across many domains of science and engineering is materials that change shape, often dramatically. Determining their structure involves solving a shape optimizati…
Jamming on deformable surfaces
Zhaoyu Xie, Timothy J Atherton
Jamming is a fundamental transition that governs the mechanical behavior of particulate media, including sand, foam and dense suspensions but also biological tissues: Upon compress…
Structural Landscapes in Geometrically Frustrated Smectics
Jingmin Xia, Scott MacLachlan, Timothy J. Atherton +1
A phenomenological free energy model is proposed to describe the behavior of smectic liquid crystals, an intermediate phase that exhibits orientational order and layering at the mo…
Elongation and percolation of defect motifs in anisotropic packing problems
Zhaoyu Xie, Timothy J. Atherton
We examine the regime between crystalline and amorphous packings of anisotropic objects on surfaces of different genus by continuously varying their size distribution or shape from…
Geometry and kinetics determine the microstructure in arrested coalescence of Pickering emulsion droplets
Zhaoyu Xie, Christopher J. Burke, Badel Mbanga +2
An important strategy to stabilize emulsions is to arrest coalescence of the constituent droplets with an opposing rheological force. Colloidal particles adsorbed on the surface of…
Arrested coalescence of viscoelastic droplets: Ellipsoid shape effects and restructuring
Chen Hao, Zhaoyu Xie, Timothy J. Atherton +1
The stable configurations formed by two viscoelastic, ellipsoid-shaped droplets during their arrested coalescence has been investigated using micromanipulation experiments. Ellipso…
Deformation and chaining of flexible shells in a nematic solvent
Andrew DeBenedictis, Andrea L. Rodarte, Linda S. Hirst +1
A micrometer-scale elastic shell immersed in a nematic liquid crystal may be deformed by the host if the cost of deformation is comparable to the cost of elastic deformation of the…
Computing equilibrium states of cholesteric liquid crystals in elliptical channels with deflation algorithms
David B. Emerson, Patrick E. Farrell, James H. Adler +2
We study the problem of a cholesteric liquid crystal confined to an elliptical channel. The system is geometrically frustrated because the cholesteric prefers to adopt a uniform ra…
Arrested coalescence of viscoelastic droplets: Triplet shape and restructuring
Prerna Dahiya, Andrew DeBenedictis, Timothy J. Atherton +4
The stability of shapes formed by three viscoelastic droplets during their arrested coalescence has been investigated using micromanipulation experiments. Addition of a third dropl…
Percolation transition in the packing of bidispersed particles on curved surfaces
Andrew M. Mascioli, Christopher J. Burke, Timothy J. Atherton
We study packings of bidispersed spherical particles on a spherical surface. The presence of curvature necessitates defects even for monodispersed particles; bidispersity either le…
Shape minimization problems in liquid crystals
Andrew DeBenedictis, Timothy J Atherton
We consider a class of liquid crystal free-boundary problems for which both the equilibrium shape and internal configuration of a system must simultaneously be determined, for exam…
Jamming on curved surfaces
Christopher J. Burke, Timothy J. Atherton
Colloidal and other granular media experience a transition to rigidity known as jamming if the fill fraction is increased beyond a critical value. The resulting jammed structures a…
Competition of Lattice and Basis for Alignment of Nematic Liquid Crystals
Andrew DeBenedictis, Candy Anquetil-Deck, Douglas J. Cleaver +4
Due to elastic anisotropy, two-dimensional patterning of substrates can promote weak azimuthal alignment of adjacent nematic liquid crystals. Here, we consider how such alignment c…
The role of curvature anisotropy in the ordering of spheres on an ellipsoid
Christopher J. Burke, Badel L. Mbanga, Zengyi Wei +2
Non-spherical emulsion droplets can be stabilized by densely packed colloidal particles adsorbed at their surface. In order to understand the microstructure of these surface packin…
Simulating defect textures on coalescing nematic shells
Badel L. Mbanga, Kate K. Voorhes, Timothy J. Atherton
Two nematic shells brought in contact coalesce in order to reduce their interfacial tension. This process proceeds through the creation of a liquid neck-like bridge through which t…
Anomalous uniform domain in a twisted nematic cell constructed from micropatterned surfaces
T. J. Atherton, J. R. Sambles, J. P. Bramble +2
We have discovered an optically uniform type of domain that occurs in Twisted Nematic (TN) cells that are constructed from substrates chemically patterned with stripes via microcon…