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. 2017 Jul 18;12(7):e0181369. doi: 10.1371/journal.pone.0181369

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© 2017 Welsch, Lyon

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — AFM height retraces of deposited microgels after drying. Microgels were synthesized at 80°C and contain different amounts of PEG-DA. From left to right: 0, 1, 5, and 10 mol-% PEG-DA. Each image has a scan size of 10 μm x 10 μm. (a). AFM height retraces of cross-linker-free microgels prepared at different polymerization temperatures. From left to right: 75, 80, 85, and 90°C. Each image has a scan size of 5 μm x 5 μm (b). The corresponding height profiles of the particles show the influence of cross-linking density on particle spreading (c). Panel (d) shows the particles heights after normalization to the corresponding hydrodynamic radii R_H. Errors were calculated via error propagation from the standard deviations derived for the AFM particle height and R_H.