Three-dimensional and quantitative reconstruction of non-accessible internal porosity in hematite nanoreactors using 360° electron tomography
Three-dimensional and quantitative reconstruction of non-accessible internal porosity in hematite nanoreactors using 360° electron tomography
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DOI：
10.1016/j.micromeso.2017.03.028
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发表时间：
2017-07
影响因子：
5.2
通讯作者：
M. Distaso;B. A. Zubiri;A. Mohtasebi;Alexandra Inayat;M. Dudák;P. Kočí;B. Butz;R. Taylor;W. Schwieger;E. Spiecker;W. Peukert
中科院分区：
文献类型：
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作者：
M. Distaso;B. A. Zubiri;A. Mohtasebi;Alexandra Inayat;M. Dudák;P. Kočí;B. Butz;R. Taylor;W. Schwieger;E. Spiecker;W. Peukert
在本论文中，介晶被用来作为有效的前体，设计具有不同类型的封闭孔隙率的纳米反应器。研究了赤铁矿介晶纳米颗粒的热处理，作为分级结构内部组织工程的后处理工具。通过透射电子显微镜、氮气吸附和360°电子断层扫描研究了起始材料和在不同温度下热处理的颗粒的孔隙率。虚拟毛细管凝聚和最大球题写被用作内部孔隙度定量评估的独立方法。实验证据和模拟的结合提供了对介晶颗粒热处理后纳米反应器内部拓扑结构的深入理解。这种新的设计策略可能为探索使用后处理的介晶作为载体来封装光电应用材料铺平了道路。
In the current paper, mesocrystals are used as effective precursors to design nanoreactors with different kinds of enclosed porosity. The thermal treatment of hematite mesocrystalline nanoparticles is investigated as a post-processing tool for the engineering of internal organization of hierarchical structures. The porosity of starting materials and of particles thermally treated at different temperatures is investigated by transmission electron microscopy, nitrogen sorption and 360° electron tomography. Virtual Capillary Condensation and Maximum Sphere Inscription are used as independent approaches for the quantitative assessment of internal porosity. The combination of experimental evidences and simulations provides a deep understanding of the internal topology of nanoreactors upon thermal treatment of mesocrystalline particles. This new design strategy may pave the way for exploring the use of the post-treated mesocrystals as carriers to encapsulate materials for optoelectronic applications.