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Synthesis of Double-Shelled Hollow Inorganic Nanospheres through Block Copolymer-Metal Coordination and Atomic Layer Deposition

1,2, 3, 4, 1,2, 1,2, 1,2 and 1,2,*
1
Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
2
Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China
3
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
4
Jiangsu Bi-gold New Material Stock Co., Ltd., Zhenjiang 212400, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1208; https://doi.org/10.3390/polym11071208
Received: 24 May 2019 / Revised: 5 July 2019 / Accepted: 6 July 2019 / Published: 19 July 2019
(This article belongs to the Special Issue Self-assembly of Block Copolymers)
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Abstract

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 Fe2O3 stands inner and TiO2 outer the structures can be obtained with atomic layer deposition of a thin layer of TiO2 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. View Full-Text
Keywords: block copolymers; self-assembly; metal–ligand coordination; atomic layer deposition; double-shelled hollow structures block copolymers; self-assembly; metal–ligand coordination; atomic layer deposition; double-shelled hollow structures
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Yan, N.; Guan, Q.; Yang, Z.; Feng, M.; Jiang, X.; Liu, J.; Xu, L. Synthesis of Double-Shelled Hollow Inorganic Nanospheres through Block Copolymer-Metal Coordination and Atomic Layer Deposition. Polymers 2019, 11, 1208.

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