Li Xiao, Xue Zhenjie, Chen Xiangyu, Qiao Xuezhi, Mo Guang, Bu Wensheng, Guan Bo, Wang Tie
Life and Health Intelligent Research Institute, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China.
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Sci Adv. 2022 Nov 11;8(45):eadd1559. doi: 10.1126/sciadv.add1559.
Hierarchical assemblies of functional nanoparticles can have applications exceeding those of individual constituents. Arranging components in a certain order, even at the atomic scale, can result in emergent effects. We demonstrate that printed atomic ordering is achieved in multiscale hierarchical structures, including nanoparticles, superlattices, and macroarrays. The CsPbBr perovskite nanocubes self-assemble into superlattices in ordered arrays controlled across 10 scales. These structures behave as single nanoparticles, with diffraction patterns similar to those of single crystals. The assemblies repeat as two-dimensional planar unit cells, forming crystalline superlattice arrays. The fluorescence intensity of these arrays is 5.2 times higher than those of random aggregate arrays. The multiscale coherent states can be printed on a meter-scale panel as a micropixel light-producing layer of primary-color photon emitters. These hierarchical assemblies can boost the performance of optoelectronic devices and enable the development of high-efficiency, directional quantum light sources.
功能性纳米粒子的分层组装体可能具有超越单个组分的应用。即使在原子尺度上按特定顺序排列组分，也会产生涌现效应。我们证明了在包括纳米粒子、超晶格和宏观阵列在内的多尺度分层结构中实现了印刷原子有序排列。CsPbBr钙钛矿纳米立方体在跨越10个尺度控制的有序阵列中自组装成超晶格。这些结构表现得如同单个纳米粒子，其衍射图案类似于单晶的衍射图案。组装体作为二维平面晶胞重复出现，形成晶体超晶格阵列。这些阵列的荧光强度比随机聚集阵列的荧光强度高5.2倍。多尺度相干态可以作为原色光子发射器的微像素发光层印刷在米级面板上。这些分层组装体可以提高光电器件的性能，并推动高效、定向量子光源的发展。
