Cheng Dan, Zhang Jun, Fu Jianye, Song Hao, Yu Chengzhong
Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia.
College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266555, China.
Sci Adv. 2023 Oct 6;9(40):eadi7502. doi: 10.1126/sciadv.adi7502. Epub 2023 Oct 4.
Assembly of silica and polymer in the absence of surfactant templates is an emerging strategy to construct intricate nanostructures, whereas the underlying mechanism and structural versatility remain largely unexplored. We report a hierarchical spatial assembly strategy of silica-polymer composites to produce silica and carbon nanoparticles with unprecedented structures. The assembly hierarchy involves a higher length scale asymmetric A-B-A core-shell-type spatial assembly in a composite sphere, and a nanoscale assembly in the middle layer B in which the silica/polymer ratio governs the assembled structures of silica nanodomains. Through an in-depth understanding of the hierarchical spatial assembly mechanism, a series of silica and carbon nanoparticles with intriguing and controllable architectures are obtained that cannot be easily achieved via conventional surfactant-templating approaches. This work opens an avenue toward the designed synthesis of nanoparticles with precisely regulated structures.
在没有表面活性剂模板的情况下组装二氧化硅和聚合物是构建复杂纳米结构的一种新兴策略，然而其潜在机制和结构多样性在很大程度上仍未得到探索。我们报道了一种二氧化硅-聚合物复合材料的分级空间组装策略，以制备具有前所未有的结构的二氧化硅和碳纳米颗粒。组装层次包括在复合球体中更高长度尺度的不对称A-B-A核壳型空间组装，以及在中间层B中的纳米级组装，其中二氧化硅/聚合物比例决定了二氧化硅纳米域的组装结构。通过深入了解分级空间组装机制，获得了一系列具有有趣且可控结构的二氧化硅和碳纳米颗粒，这些颗粒通过传统的表面活性剂模板方法难以轻易实现。这项工作为设计合成具有精确调控结构的纳米颗粒开辟了一条途径。
