ArticleProceedings of the National Academy of Sciences of the United States of America2026
Lower charge, higher order: Revising electrostatic control of nematic phases in 2D polyelectrolytes.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Classical theories of nematic ordering in charged platelets predict that increasing surface charge stabilizes alignment. They also predict enhanced alignment when ionic strength is reduced. Here, in agreement with established theories, we show that in graphene oxide (GO) and related two-dimensional polyelectrolytes, nematic order and structural color emerge as surface charge density is reduced, concomitant with a decrease in self-generated ionic strength and an increase in the effective range of electrostatic repulsion. Using a minimal model combining counterion-only Poisson-Boltzmann electrostatics, van der Waals attraction, and Helfrich undulation, we show that ordering is governed by a self-screened electrostatic length scale, d
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