期刊
LANGMUIR
卷 32, 期 28, 页码 7159-7169出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.6b01658
关键词
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资金
- EPSRC [EP/J019364/1]
- Engineering and Physical Sciences Research Council [EP/N51004X/1, EP/J019364/1] Funding Source: researchfish
- EPSRC [EP/J019364/1, EP/N51004X/1] Funding Source: UKRI
We evaluate the effect of epoxy surface structuring on the evaporation of water droplets containing Staphylococcus epidermidis (S.epidermidis). During evaporation, droplets with S. epidermidis cells yield to complex wetting patterns such as the zipping-wetting(1-3) and the coffee-stain effects. Depending on the height of the microstructure, the wetting fronts propagate circularly or in a stepwise manner, leading to the formation of octagonal or square-shaped deposition patterns.(4,5) We observed that the shape of the dried droplets has considerable influence on the local spatial distribution of epidermidis deposited between micropillars. These changes are attributed to an unexplored interplay between the zipping-wetting(1) and the coffee-stain(6) effects in polygonally shaped droplets containing S. epidermidis. Induced capillary flows during evaporation of S. epidermidis are modeled with polystyrene particles.. Bacterial viability measurements for S. epidermidis show high viability of planktonic cells, but low biomass deposition on the microstructured surfaces. Our findings provide insights into design criteria for the development of microstructured surfaces on which bacterial propagation could be controlled, limiting the use of biocides.
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