Exerting Spatial Control During Nanoparticle Occlusion within Calcite Crystals.
Exerting Spatial Control During Nanoparticle Occlusion within Calcite Crystals.
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DOI：
10.1002/anie.202007110
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发表时间：
2020-07
影响因子：
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通讯作者：
Yin Ning;Yide Han;Lijuan Han;M. Derry;S. Armes
中科院分区：
文献类型：
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作者：
Yin Ning;Yide Han;Lijuan Han;M. Derry;S. Armes
原则上，纳米颗粒在晶体中的包埋为制备新的纳米复合材料提供了一条简单有效的途径。然而，开发一个更深入的理解的设计规则支持这一战略是非常可取的。特别地，控制客体纳米颗粒在主体晶体基质内的空间分布仍然是一个艰巨的挑战。在这里，我们表明，客体纳米粒子的表面化学和[Ca 2+ ]浓度在确定纳米粒子在方解石晶体内的精确空间位置中起着关键作用。此外，原位研究提供了关于表面限制的纳米颗粒包埋的重要机理见解。总的来说，这项研究不仅为有效的纳米颗粒包埋提供了有用的指导方针，而且还能够使用模型阴离子嵌段共聚物囊泡合理设计图案化的方解石晶体。
In principle, nanoparticle occlusion within crystals provides a straightforward and efficient route to make new nanocomposite materials. However, developing a deeper understanding of the design rules underpinning this strategy is highly desirable. In particular, controlling the spatial distribution of the guest nanoparticles within the host crystalline matrix remains a formidable challenge. Herein, we show that the surface chemistry of the guest nanoparticles and the [Ca 2+ ] concentration play critical roles in determining the precise spatial location of the nanoparticles within calcite crystals. Moreover, in situ studies provide important mechanistic insights regarding surface-confined nanoparticle occlusion. Overall, this study not only provides useful guidelines for efficient nanoparticle occlusion, but also enables the rational design of patterned calcite crystals using model anionic block copolymer vesicles.