Layered perovskite oxynitride LiLaTa₂O_6.15N_0.57 with Dion-Jacobson phase was successfully exfoliated into colloidal suspension by using proton-exchange reaction and followed intercalation of ethylamine and tetrabutylammonium ion. According to the X-ray diffraction pattern, a basal spacing of the layered perovskite oxynitride concomitantly increased as the intercalation reaction with bulky cations proceeded. Transmission electron microscopy and atomic force microscopy analysis indicated that the exfoliated perovskite oxynitride was composed of single-layered and multi-stacked nanoplatelets. UV-vis diffuse reflectance showed that the self-reassembled perovskite oxynitride nanosheet also had characteristic absorption in a visible range, revealing that visible light harvesting property of the perovskite oxynitride maintained even after exfoliation and subsequent reassembling reaction. Extended X-ray absorption fine structure (EXAFS) analysis of samples clearly showed that structural disorder upon intercalation reaction resulted in damping of EXAFS oscillation, suggesting nanosized feature of the exfoliated nanosheet.

层状钙钛矿氧氮化物LiLaTa ₂ O _6.15 N _0.57通过质子交换反应，然后插入乙胺和四丁基铵离子，成功地将具有Dion-Jacobson相的Dion-Jacobson相剥落为胶体悬浮液。根据X射线衍射图，随着与大体积阳离子的嵌入反应的进行，层状钙钛矿氧氮化物的基本间距随之增加。透射电子显微镜和原子力显微镜分析表明，剥落的钙钛矿氧氮化物由单层和多层堆叠的纳米片组成。紫外可见漫反射显示自重组钙钛矿氧氮化物纳米片在可见光范围内也具有特征吸收，表明即使在剥离和随后的重组反应后，钙钛矿氧氮化物的可见光收集性能也得以保持。