What the study reports
Three smectic liquid-crystal elastomers exhibit negative Poisson ratios above approximately 40% strain. The authors report short smectic correlation lengths consistent with frustrated layering, anisotropic shear moduli, and a 31% difference in room-temperature tack between alignment geometries. Their analysis distinguishes measured tack from larger adhesion differences suggested by moduli. [1]
What this does not establish
This assessment uses the publisher abstract of a peer-reviewed accepted early version. Auxeticity emerges at substantial strain; it is not established here for small-amplitude vibration. A proposed twentyfold adhesion contrast is not the measured tack result. The paper declares a pending patent associated with one formulation.
Our engineering reading
Molecular alignment offers a design variable beyond porous geometry. Using these materials in a device requires verifying strain range, loading direction, adhesion test conditions and durability for that application.
Editorial interpretation; not an additional measured result.Frustrated smectic liquid crystal elastomers as multifunctional mechanical metamaterials
Nature Communications · 11 September 2026
DOI: 10.1038/s41467-026-76776-x- Publisher peer-reviewed accepted early version; not final version of record PRIMARY SOURCE · publisher · checked 3 October 2026
- Crossref corroboration of ordered authors, DOI and online publication date · metadata · checked 3 October 2026
Scientific coverage: Publisher accepted early version: abstract and complete author metadata accessible; full scientific text was not accessible. Not yet the final version of record.. Source check: 3 October 2026.
Metadata enrichment does not imply that the full scientific methods were reviewed.