79 citations · 258 across the 15 of their papers we have counts for
11 papers · 1 filter
Buckling by disordered growth
Rahul G. Ramachandran, Ricard Alert, Pierre A. Haas
Buckling instabilities driven by tissue growth underpin key developmental events such as the folding of the brain. Tissue growth is disordered due to cell-to-cell variability, but…
Cut it out: Out-of-plane stresses in cell sheet folding of Volvox embryos
Pierre A. Haas, Stephanie S. M. H. Höhn
The folding of cellular monolayers pervades embryonic development and disease. It results from stresses out of the plane of the tissue, often caused by cell shape changes including…
Comment on "Faceting and Flattening of Emulsion Droplets: A Mechanical Model"
Pierre A. Haas, Raymond E. Goldstein, Diana Cholakova +2
García-Aguilar et al. [Phys. Rev. Lett 126, 038001 (2021)] have shown that the deformations of "shape-shifting droplets" are consistent with an elastic model, that, unlike previous…
Turing's diffusive threshold in random reaction-diffusion systems
Pierre A. Haas, Raymond E. Goldstein
Turing instabilities of reaction-diffusion systems can only arise if the diffusivities of the chemical species are sufficiently different. This threshold is unphysical in most syst…
Morphoelasticity of Large Bending Deformations of Cell Sheets during Development
Pierre A. Haas, Raymond E. Goldstein
Deformations of cell sheets during morphogenesis are driven by developmental processes such as cell division and cell shape changes. In morphoelastic shell theories of development,…
Shape-Shifting Polyhedral Droplets
Pierre A. Haas, Diana Cholakova, Nikolai Denkov +2
Cooled oil emulsion droplets in aqueous surfactant solution have been observed to flatten into a remarkable host of polygonal shapes with straight edges and sharp corners, but diff…
Embryonic Inversion in : The Flipping and Peeling of Elastic Lips
Pierre A. Haas, Raymond E. Goldstein
The embryos of the green alga are spherical sheets of cells that turn themselves inside out at the close of their development through a programme of cell shape cha…
Mechanics and Variability of Cell Sheet Folding in the Embryonic Inversion of
Pierre A. Haas, Stephanie S. M. H. Höhn, Aurelia R. Honerkamp-Smith +2
Many embryonic deformations during development are the global result of local cell shape changes and other local active cell sheet deformations. Morphogenesis does not only therefo…
A Theory of Shape-Shifting Droplets
Pierre A. Haas, Raymond E. Goldstein, Stoyan K. Smoukov +2
Recent studies of cooled oil emulsion droplets uncovered transformations into a host of flattened shapes with straight edges and sharp corners, driven by a partial phase transition…
Elasticity and Glocality: Initiation of Embryonic Inversion in
Pierre A. Haas, Raymond E. Goldstein
Elastic objects across a wide range of scales deform under local changes of their intrinsic properties, yet the shapes are , set by a complicated balance between loca…
Dynamics of a Embryo Turning Itself Inside Out
Stephanie Höhn, Aurelia R. Honerkamp-Smith, Pierre A. Haas +2
Spherical embryos of the algal genus must turn themselves inside out to complete their embryogenesis. This `inversion', which shares important features with morphological…