Author
Listed:
- Alexander B. Tesler
(John A. Paulson School of Engineering and Applied Sciences, Harvard University
Wyss Institute for Biologically Inspired Engineering, Harvard University)
- Philseok Kim
(Wyss Institute for Biologically Inspired Engineering, Harvard University
Present address: SLIPS Technologies, Inc., Cambridge, Massachusetts 02140, USA.)
- Stefan Kolle
(John A. Paulson School of Engineering and Applied Sciences, Harvard University
Wyss Institute for Biologically Inspired Engineering, Harvard University)
- Caitlin Howell
(John A. Paulson School of Engineering and Applied Sciences, Harvard University
Wyss Institute for Biologically Inspired Engineering, Harvard University)
- Onye Ahanotu
(Wyss Institute for Biologically Inspired Engineering, Harvard University)
- Joanna Aizenberg
(John A. Paulson School of Engineering and Applied Sciences, Harvard University
Wyss Institute for Biologically Inspired Engineering, Harvard University
Kavli Institute for Bionano Science and Technology, Harvard University)
Abstract
Formation of unwanted deposits on steels during their interaction with liquids is an inherent problem that often leads to corrosion, biofouling and results in reduction in durability and function. Here we report a new route to form anti-fouling steel surfaces by electrodeposition of nanoporous tungsten oxide (TO) films. TO-modified steels are as mechanically durable as bare steel and highly tolerant to compressive and tensile stresses due to chemical bonding to the substrate and island-like morphology. When inherently superhydrophilic TO coatings are converted to superhydrophobic, they remain non-wetting even after impingement with yttria-stabilized-zirconia particles, or exposure to ultraviolet light and extreme temperatures. Upon lubrication, these surfaces display omniphobicity against highly contaminating media retaining hitherto unseen mechanical durability. To illustrate the applicability of such a durable coating in biofouling conditions, we modified naval construction steels and surgical instruments and demonstrated significantly reduced marine algal film adhesion, Escherichia coli attachment and blood staining.
Suggested Citation
Alexander B. Tesler & Philseok Kim & Stefan Kolle & Caitlin Howell & Onye Ahanotu & Joanna Aizenberg, 2015.
"Extremely durable biofouling-resistant metallic surfaces based on electrodeposited nanoporous tungstite films on steel,"
Nature Communications, Nature, vol. 6(1), pages 1-10, December.
Handle:
RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9649
DOI: 10.1038/ncomms9649
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