As the latest breakthrough in the field of metamaterials, the interfacial coupling of topological and multistable states of wooden metamaterials remarkably enhances functionality and enables transformative applications. However, the high coupling and complex geometrical properties of the microlattice may impose constrain on design flexibility and scalability. Herein, we present a mechanically/thermomechanically electromagnetically multifunctional CFO-CNFene metamaterial featuring stochastically tunable aggregation-prone magnetic particles by in situ deposition of homogeneous magnetic CoFe ₂ O ₄ nanoparticles through intermolecular interactions in a lightweight CNFene aerogel backbone. The resulting lightweight porous CFO-CNFene metamaterials exhibit remarkable characteristics, including temperature-invariant superelasticity and ultralow thermal conductivity (26.12 mW m ⁻¹ K ⁻¹ ), and, combined with the synergistic enhancement provided by the agglomerate-free double cross-linked ferromagnetic cobalt ferrite nanoparticles, result in comprehensive multifunctionalities, including rapid deformation, fire resistance, infrared thermal camouflage behavior, electromagnetic interference shielding efficiency (99.999%), and electromagnetic wave absorption efficiency (99.99%). This breakthrough supports the development of advanced electromagnetic stealth technologies for military and civilian applications, including radar stealth and radiation protection.

Detailed anatomical features of bark are used and interpreted in plant taxonomy, phylogenetics, and other areas of plant science. However, the delicate nature of bark cells, combined with the difficulty of obtaining high-quality sections and reliable data, limits the potential for utilizing and processing bark. In this study, the anatomical structure of the bark of 10 Quercus species growing in Yunnan Province, China, was characterized in detail. The results indicate that the anatomical features of the barks of 10 Quercus spp. show a certain degree of consistency. Specifically, sieve tubes are distributed in solitary elements or in small groups, mostly as compound sieve plates containing 2–8 sieve areas, suggesting that Quercus spp. may occupy a conservative evolutionary position. Additionally, for the first time, this study reports the presence of simple sieve plates in the sieve tube elements of Quercus phloem. Each sieve tube element has a companion cell on one side. The companion cell strands contain 2–7 cells. Axial parenchyma is diffuse, with parenchyma strands typically consisting of 4–7 cells; druses are present within chambered crystalliferous cells. Phloem rays are of two distinct sizes and often exhibit dilatation and sclerification, and the ray composition consists of procumbent cells. Sclerenchyma is composed of fibers and sclereids, both of which contain prismatic crystals. Most of the fibers are gelatinous fibers, which are distributed in discontinuous tangential bands of about five cells in width. Sclereids appear in clusters. The presence of sclerenchyma provides mechanical support to the bark, reducing the collapse of the phloem. Periderm usually consists of around 10–30 layers of phellem, and Quercus acutissima and Q. variabilis can reach dozens or hundreds layers. The phelloderm typically consists of from two to five layers, with Q. variabilis having up to ten or more layers. The filling tissue of lenticels in all Quercus species is nonstratified (homogeneous) and largely nonsuberized. Overall, this study enriches our comprehension of Quercus bark anatomy, elucidating evolutionary patterns, functional adaptations, and ecological ramifications within this significant botanical genus.