Yan Nina, Guan Qingbao, Yang Zhiming, Feng Min, Jiang Xizhi, Liu Jun, Xu Lei
Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China.
Polymers (Basel). 2019 Jul 19;11(7):1208. doi: 10.3390/polym11071208.
Double-shelled hollow (DSH) structures with varied inorganic compositions are confirmed to have improved performances in diverse applications, especially in lithium ion battery. However, it is still of great challenge to obtain these complex nanostructures with traditional hard templates and solution-based route. Here we report an innovative pathway for the preparation of the DSH nanospheres based on block copolymer self-assembly, metal-ligand coordination and atomic layer deposition. Polymeric composite micelles derived from amphiphilic block copolymers and ferric ions were prepared with heating-enabled micellization and metal-ligand coordination. The DSH nanospheres with FeO stands inner and TiO outer the structures can be obtained with atomic layer deposition of a thin layer of TiO followed with calcination in air. The coordination was carried out at room temperature and the deposition was performed at the low temperature of 80 °C, thus providing a feasible fabrication strategy for DSH structures without destruction of the templates. The cavity and the outer layer of the structures can also be simply tuned with the utilized block copolymers and the deposition cycles. These DSH inorganic nanospheres are expected to find vital applications in battery, catalysis, sensing and drug delivery, etc.
具有不同无机组成的双壳空心（DSH）结构在多种应用中，特别是在锂离子电池中，已被证实具有改进的性能。然而，利用传统的硬模板和基于溶液的方法来获得这些复杂的纳米结构仍然面临巨大挑战。在此，我们报道了一种基于嵌段共聚物自组装、金属-配体配位和原子层沉积制备DSH纳米球的创新途径。通过加热诱导的胶束化和金属-配体配位作用，制备了由两亲性嵌段共聚物和铁离子衍生的聚合物复合胶束。通过在空气中煅烧之前先进行TiO薄层的原子层沉积，可以获得内部为FeO、外部为TiO结构的DSH纳米球。配位在室温下进行，沉积在80°C的低温下进行，从而为DSH结构提供了一种可行的制备策略，而不会破坏模板。结构的空腔和外层也可以通过所使用的嵌段共聚物和沉积循环进行简单调节。这些DSH无机纳米球有望在电池、催化、传感和药物递送等领域找到重要应用。
