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Particle tip shape controls nematic order in growing colonies

When elongated cells grow and divide, they spontaneously arrange into ordered, nematic patterns. We showed that a seemingly minor geometric detail — the shape of a particle’s tips — is in fact a decisive control parameter for the mesoscale orientational order that emerges. An effective master-equation description dissects how ordered microdomains form and break up through distinct stress-mediated and stochastic mechanisms, offering a handle to predict and tune the resulting texture.

Well done, Jonas — a beautifully detailed study!

J. Isensee, P. Bittihn, Sensitive particle shape dependence of growth-induced mesoscale nematic structure, Soft Matter 21, 4233 (2025).