Jiecai Han

TL;DR: The results provide an approach that breaks the long-standing trade-off between low energy consumption and high-speed nanophotonics, introducing vortex microlasers that are switchable at terahertz frequencies.

TL;DR: The authors fabricate a metasurface with high brightness and large gamut structured colors by combining a silicon metasURface with a refractive index matching layer, improving the brightness and the color purity significantly.

TL;DR: The results indicated that ANFs are promising nanoscale building blocks for functional ultrastrong and stiff materials potentially extendable to nanocomposites based on other nanoscales fillers.

TL;DR: It is determined that a higher content of N does not necessarily lead to enhanced electrocatalytic activity; rather, at a relatively low N content and a high ratio of graphitic-N/pyridinic-N, the nitrogen-doped graphene obtained by annealing at 900 °C provides the most promising activity for ORR.

TL;DR: In this article, a dc magnetron sputtering at different Ar/N 2 discharges was used to deposit FeN thin films on glass substrates and the composition, structure and surface morphology of the films were characterized using X-ray photoelectron spectroscopy (XPS), XRD, and atomic force microscopy (AFM).