New paper out in Nature Materials

Coatings super-repellent to ultralow surface tension liquids, Nature Materials, DOI: 10.1038/s41563-018-0178-2

Link for free, full access to the paper: https://rdcu.be/9i75

Researchers from qBionano and collaborators have just published a new paper describing the design and engineering of a coating that is super-repellent to all liquids. Read more below.


Previous methods to achieve super-repellency have been based on “top-down approaches” (e.g. etching of silica wafer), this is the first method that describes a bottom-up approach (self-assembled nano-coating).

a.png

Electron microscopy images of the super-repellent coatings. Scale bars, 50 and 5 μm, respectively. The insets show the contact of a millimetre-sized oil droplet with the coating (a) and the typical inverted hierarchical trapezoidal structure at the cross-section (b). Inset scale bars, 5 mm and 5 μm, respectively.

“It’s been very exciting work”, Dr Mattias Björnmalm, one of the co-authors, said about the paper. “Being able to control liquid–solid interactions this precisely opens up a range of new research opportunities: both in fundamental and applied sciences. One could for example imagine medical devices that can resist fouling or new types of surfaces for exploring fundamental liquid dynamics”.

a

The images illustrate an ultralow surface tension oil droplet (n-hexane, initial droplet radius ≈ 1 mm) bouncing on a horizontally placed coated substrate. Time intervals are ~6 ms. Scale bar, 5 mm.

The work was an international collaboration with researchers from Imperial College London (UK), the University of Melbourne (Australia), the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology (Australia) and Hunan University (China).

The article is available online (DOI) and additional full-text options are available here.

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