Gradient magnetic heterointerfaces have injected infinite vitality in optimizing impedance matching, adjusting dielectric/magnetic resonance and promoting electromagnetic (EM) wave absorption, but still exist a significant challenging in regulating local phase evolution. Herein, accordion-shaped Co/Co₃O₄@N-doped carbon nanosheets (Co/Co₃O₄@NC) with gradient magnetic heterointerfaces have been fabricated via the cooperative high-temperature carbonization and low-temperature oxidation process. The results indicate that the surface epitaxial growth of crystal Co₃O₄ domains on local Co nanoparticles realizes the adjustment of magnetic-heteroatomic components, which are beneficial for optimizing impedance matching and interfacial polarization. Moreover, gradient magnetic heterointerfaces simultaneously realize magnetic coupling, and long-range magnetic diffraction. Specifically, the synthesized Co/Co₃O₄@NC absorbents display the strong electromagnetic wave attenuation capability of -53.5 dB at a thickness of 3.0 mm with an effective absorption bandwidth of 5.36 GHz, both are superior to those of single magnetic domains embedded in carbon matrix. This design concept provides us an inspiration in optimizing interfacial polarization, regulating magnetic coupling and promoting electromagnetic wave absorption.

Contrary to widespread assumptions, the largest shark that ever lived – Otodus megalodon – fed on marine creatures at various levels of the food pyramid and not just the top, as an international research team led by Goethe University Frankfurt has now discovered. The scientists analyzed the zinc content of a large sample of fossilized megalodon teeth, which had been unearthed above all in Sigmaringen and Passau, and compared them with fossil teeth found elsewhere and the teeth of animals that inhabit our planet today.

Jellyfish cyborgs may sound like something straight out of science fiction. But harnessing jellyfishes’ natural locomotion provides an efficient and environmentally-friendly means to monitor coral reefs, track oil spills or observe climate change. Now,  a team from Tohoku University’s Department of Robotics has successfully modulated the swimming behavior of jellyfish using gentle electric pulses and generated a means of measuring it via AI. In doing so, they have created a gentle way to harness the powerful swimming mechanisms of jellyfish.

A new study led by the University of Sydney reveals how cities around the world are restoring wildlife to their former habitats in the face of ongoing urban sprawl.