Fig. 3
From: Coincident molecular auxeticity and negative order parameter in a liquid crystal elastomer
Material volume conservation and microstructure with strain. For samples tested under condition I: a z-axis strains, εz in response to imposed x-axis strains, εx, measured via direct observation of the LCE xz plane (green crosses) and through application of the constant volume condition to strain measurements of the xy plane (orange boxes). Errors are measurement errors (n = 1). b Photographs of the xy plane of the LCE showing consistent transparent and non-scattering, or stress-whitened, appearance. Scale bar, 5 mm. c, d Cryo-SEM images of a sample strained to the auxetic regime and freeze fractured to expose a yz cross section. Scale bars, 2.5 µm and 250 nm, respectively
