Biphasic High‐Entropy Heterojunctions Enabled by Perovskite Transformation
Biphasic High‐Entropy Heterojunctions Enabled by Perovskite Transformation
研究概述
利用钙钛矿前驱体原位还原，使B位过渡金属析出为高熵合金纳米颗粒，A位稀土转为高熵氧化物载体，形成锚定双相异质结。界面、缺陷及磁结构协同增强电磁损耗，有效吸收带宽较两类对照分别提高176%和242%；柔性膜还能促进电磁能转热及导热。
谱图与表征信息
FIGURE 3 Strain distribution and atomic-scale characterization at the HEA–HEO interface. (a) HAADF–STEM image of the HEA–HEO interface. (b) Local magnification of panel (a) showing the HEA (111) plane and HEO (002) plane. (c) FFT pattern corresponding to (b), indexed with HEA [110] and HEO [001] crystal zone axes. (d–g) εxx strain distribution maps and corresponding histograms for HEA (d,e) and HEO (f,g), respectively. (h) εxy strain distribution across the HEA–HEO interface. (i) Strain distribution curve along the marked line in (h). (j) Co K-edge XANES spectra of HEA–HEO, HE–LCO, and Co foil. (k) k2-weighted EXAFS Fourier transform spectra for the corresponding samples.