Stefan Bruns
University of Copenhagen
52 Papers
108 Citations
Stefan Bruns is an academic researcher from University of Copenhagen. The author has contributed to research in topics: Porous medium & Chemistry. The author has an hindex of 15, co-authored 36 publications. Previous affiliations of Stefan Bruns include Technical University of Denmark & University of Marburg.
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Papers
Morphology and separation efficiency of a new generation of analytical silica monoliths.
TL;DR: A new generation of analytical silica monoliths are presented that deliver a substantially improved separation efficiency achieved through several advances in monolith morphology and possess not only smaller macropores, a more homogeneous macropore space, and a thinner silica skeleton, but also radial homogeneity of these structural parameters as well as of the local external or macroporosity.
108
Physical reconstruction of packed beds and their morphological analysis: Core–shell packings as an example
Stefan Bruns,Ulrich Tallarek +1 more
TL;DR: The presented approach allows to analyze and quantify the packing microstructure from pore to column scale and therefore holds great promise in a comparative study of packing conditions and particle properties, particularly for characterizing and minimizing the packing process-specific heterogeneities in the final bed structure.
86
Morphology and separation efficiency of low-aspect-ratio capillary ultrahigh pressure liquid chromatography columns.
TL;DR: This study derives a quantitative relationship between the bed morphology and the chromatographic separation efficiency of capillary columns packed with sub-2 μm particles, covering capillary inner diameters from 10 to 75 μm.
85
Influence of particle properties on the wall region in packed capillaries.
TL;DR: Experimental evidence is provided that the reduced eddy dispersion contribution with core-shell packings should be attributed to a higher transcolumn homogeneity rather than to an improved bed morphology on smaller length scales, e.g., to a reduced short-range disorder.
70
Confocal Laser Scanning Microscopy Method for Quantitative Characterization of Silica Monolith Morphology
Stefan Bruns,Tibor Müllner,Martin Kollmann,Joachim Schachtner,Alexandra Höltzel,Ulrich Tallarek +5 more
TL;DR: A fast, nondestructive, and quantitative approach to characterize the morphology of capillary silica-based monolithic columns by reconstruction from confocal laser scanning microscopy images, which allows the rapid acquisition of hundreds of longitudinal and cross-sectional images in a single session.
69