38 citations · 204 across the 30 of their papers we have counts for
30 papers
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…
LGBT+ Inclusivity in Physics and Astronomy: A Best Practices Guide
Nicole Ackerman, Timothy Atherton, Adrian Ray Avalani +5
We present the second edition of a Best Practices Guide for academic departments and other institutions striving to create more inclusive environments for physicists and astronomer…
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…
Developing a project-based computational physics course grounded in expert practice
Christopher Burke, Timothy J Atherton
We describe a project-based computational physics course developed using a backwards course design approach. From an initial competency-based model of problem solving in computatio…
Maximizing the hyperpolarizability of 1D potentials with multiple electrons
Christopher J. Burke, Joseph Lesnefsky, Rolfe G. Petschek +1
We optimize the first and second intrinsic hyperpolarizabilities for a 1D piecewise linear potential dressed with Dirac delta functions for non-interacting electrons. The optim…
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…
Predicting the Influence of Plate Geometry on the Eddy Current Pendulum
Catherine Weigel, Jeremy M. Wachter, Paul Wagoner +1
We quantitatively analyze a familiar classroom demonstration, Van Waltenhofen's eddy current pendulum, to predict the damping effect for a variety of plate geometries from first pr…
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…
Topological Modes in One Dimensional Solids and Photonic Crystals
Timothy J. Atherton, Celia A. M. Butler, Melita C. Taylor +4
It is shown theoretically that a one-dimensional crystal with time reversal symmetry is characterized by a Z_{2} topological invariant that predicts the existence or otherwise of e…
Energy Minimization for Liquid Crystal Equilibrium with Electric and Flexoelectric Effects
J. H. Adler, T. J. Atherton, T. R. Benson +2
This paper outlines an energy-minimization finite-element approach to the modeling of equilibrium configurations for nematic liquid crystals in the presence of internal and externa…
An Energy-Minimization Finite-Element Approach for the Frank-Oseen Model of Nematic Liquid Crystals: Continuum and Discrete Analysis
J. H. Adler, T. J. Atherton, D. B. Emerson +1
This paper outlines an energy-minimization finite-element approach to the computational modeling of equilibrium configurations for nematic liquid crystals under free elastic effect…
Neuronal Growth as Diffusion in an Effective Potential
Daniel J. Rizzo, James D. White, Elise Spedden +4
Current understanding of neuronal growth is mostly qualitative, as the staggering number of physical and chemical guidance cues involved prohibit a fully quantitative description o…