材料科学
纳米结构
纳米技术
无定形二氧化硅
单体
无定形固体
化学工程
结晶学
化学
复合材料
工程类
聚合物
作者
Jeong Hun Choi,Nitee Kumari,Jung Hun Koo,Amit Kumar,Changhoon Lee,Ji Hoon Shim,Zhipeng Wang,Sang Ho Oh,In Su Lee
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-01-28
卷期号:22 (3): 1159-1166
标识
DOI:10.1021/acs.nanolett.1c04268
摘要
Despite the enormous applications of and fundamental scientific interest in amorphous hollow-silica nanostructures (h-SiNSs), their synthesis in crystal-like nonspherical polygonal architectures is challenging. Herein, we present a facile one-shot synthetic procedure for various unconventional h-SiNSs with controllable surface curvatures (concave, convex, or angular), symmetries (spherical, polygonal, or Janus), and interior architectures (open or closed walls) by the addition of a metal salt and implementing kinetic handles of silica precursor (silanes/ammonia) concentrations and reverse-micellar volume. During the silica growth, we identified the key role of transiently in situ crystallized metal coordination complexes as a nanopolyhedral "ghost template", which provides facet-selective interactions with amino-silica monomers and guides the differential silica growth that produces different h-SiNSs. Additionally, crystal-like well-defined polygonal h-SiNSs with flat surfaces, assembled as highly ordered close-packed octahedral mesoscale materials (ca. 3 μm) where h-SiNSs with different nanoarchitectures act as building units (ca. 150 nm) to construct customizable cavities and nanospaces, differ from conventionally assembled materials.
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