Quantification of a Single Aggregate Inner Porosity and Pore Accessibility Using Hard X-ray Phase-Contrast Nanotomography

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• 作者：Pavel Trtik ; Miroslav Soos ; Beat M眉nch ; Alexandros Lamprou ; Rajmund Mokso ; Marco Stampanoni
• 刊名：Langmuir
• 出版年：2011
• 出版时间：November 1, 2011
• 年：2011
• 卷：27
• 期：21
• 页码：12788-12791
• 全文大小：785K
• 年卷期：v.27,no.21(November 1, 2011)
• ISSN：1520-5827

文摘

The 3D structure of three individual aggregates composed of 165 nm polystyrene primary particles is revealed nondestructively by hard X-ray phase-contrast synchrotron nanotomography. Three-dimensional image analysis allows us for the first time to obtain the complex inner porosity of the entire aggregate. It is demonstrated that despite their rather compact structure, characterized by a fractal dimension equal to 2.7, the produced aggregates are still porous, with porosity increasing with its size. Generated pores have diameters from 100 nm to 3 渭m and are almost completely interconnected.