Journal
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
Volume 17, Issue 6, Pages 388-395Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2012.08.002
Keywords
Colloids; X-ray microscopy; Confocal microscopy; In-situ visualization; Colloidal wettability; Interfacial tension
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Funding
- Creative Research Initiatives (Functional X-ray Imaging) of MEST/NRF
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Colloids (colloidal particles or nanoparticles) and their in-situ characterizations are important topics in colloid and interface science. In-situ visualization of colloids with X-ray microscopy is a growing frontier. Here, after a brief introduction on the method, we focus on its application for identifying nanoscale wettability of colloidal particles at fluid interfaces, which is a critical factor in colloidal self-assembly. We discuss a quantitative study on colloidal wettability with two microscopic methods: (i) X-ray microscopy by visualizing natural oil-water interfaces and (ii) confocal microscopy by visualizing fluorescently-labeled interfaces. Both methods show consistent estimation results in colloid-fluid interfacial tensions. This comparison strongly suggests a feasibility of X-ray microscopy as a promising in-situ protocol in colloid research, without fluorescent staining. Finally, we address a prospect of X-ray imaging for colloid and interface science. (C) 2012 Elsevier Ltd. All rights reserved.
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