The scientist made the process in platinum, titanium, and brass
This can be huge, water is one of the most damaging substance to metals, corrosion kills any metal structure if not treated with some anticorrosion
coating in a few years, these usually are usually hydrophobic polymers that due to several factors are not very efficient doing so. Nature have a
different approach to generate hydrophobicity, instead of using hydrophobic materials it creates a very rough surface that prevent water for wetting
most of the the surface as in the case of Lilly pads.
Lilly pads have a macro and micro structure that makes the leaves hydrophobic
Now scientist of the University of Rochester have created something similar with the use of femtosecond laser pulses to create the roughness necessary
to allow the metal by itself to repel water.
hierarchical structures on the platinum surface
This have very big potential applications in many industries, for example airplanes have the problem that in certain climates ice can be generated in
the surface of the plane often with fatal consequences, with this kind of surface water cannot deposit in the surface and small ice particle generated
on it are quickly removed as they earn mass.
The biggest problem is that the roughness have to be maintained i n order for it to work, erosion would quickly change the roughness of the surface so
who knows if this really will get to something one day, that what i think at least, it all depends on how much the treatment last, perhaps a plane
just need to be "burned" again every couple of years, or after one flight the surface properties completely change, 500 mph winds can be really
But at lest something cool that shows we are progressing, slowly but we are, the same material we have been using for ages now can have a potential
new use, just by the way we process it, not a new exotic material super rare in the world, just the same old metals we have been using for so long;
perhaps some day we will be traveling the stars in wooden ships, its just that we don't know yet how to use it .
I don't think so, all this systems where there is an heterogeneous surface only means that the area that is in contact with the liquid is less than
the total area following the Cassie's law, at the end what happens is something like this
So still a big chunk of the surface is in contact with the liquid having friction and all, friction and wetting is not the same, in principle the
smaller the area is the wetting will have a bigger impact in the friction, the larger the area is this impact decreases.
Sweet find...I've been watching this nano tech too.
I would like to get ahold of it for some testing. See what it does to a boat hull when displacing water.
Would a boat with only part of the hull coated propel itself without any other power source?
...Path of least resistance and all. Might have the worlds most efficient propulsion.
Imagine a metal roof with this texture. Hell, even just applying it to sattelite dishes would seemingly remove the issue with built-up ice and loss of
Sadly, thought, I can't imagine the surface retaining the micro-texture for too long, though, especially if there is any direct friction being
applied to the surface. I'd like to see that part of the equation addressed--it's durability. Obviously, it'd depend on the hardness of the metal,
so maybe things would need to be titanium-plated after the texture is applies (or maybe before) in order for it to last. That seems like it could get
Also, since hydrodynamics and aerodynamics retain many similar physical properties, I wonder how this works at keeping compressed air off of moving
vehicles to allow them to slice through the air better...much like the divits on a golf ball, but at the nano scale.
Another thought...imagine a water slide with this surface treatment!
So maybe our pretty colored cars will have to combine the superhydrophobic metals with that find about plants that make their colors from the size of
surface anomalies instead of pigmentation. (I have no idea where to find the reference to that one...but it's out there. I think I even heard about
it on ATS, even.)
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