are they vantablack tho
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Mine are not aligned like theirs, so no. VANTA = "vertically aligned nano tube array". They grow them straight onto the surface. But they are somewhat similar to e.g. Vantablack-SVIS, the spray-on version. It mainly just depends on the binder, solvent, and bake process.pic.twitter.com/4e5oWF6mcD
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Comparison between the two-- the 'SVIS' form is basically just a standard random-alignment MWCNT coating (also seen in the images I uploaded above), albeit with very good binder, solvent, and application process optimization. Up to ~99.8% light absorption vs. ~99.965%.pic.twitter.com/Ycg6FT9ygG
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There are others now as well. Surrey came out with a lower temp vacuum-applied random alignment coating called VBx 1, plus an open-air low curing temp spray coating called VBx 2. The original Vantablack has also been further improved to essentially unmeasurable levels of black.
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Sources indicate the improved variant uses longer and more consistently single-walled nanotubes. Not sure whether further refinements in avoiding pinpoint imperfections were involved as well, but CVD thin film coating companies tend to make ongoing improvements in that area.
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Cycling applications are getting interesting. Graphene+carbon frames starting to come out... steel-impregnated carbon that doesn't shatter. There was this goofy grid stuff in the '00spic.twitter.com/IQRQR4YIAv
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Also, we now finally have a means of making cables out of aligned carbon nanotubes-- reaching ~80% of the full theoretical tensile strength of the individual nanotubes. This is real now.https://arstechnica.com/science/2018/05/forget-carbon-fiber-we-can-now-make-carbon-nanotube-fibers/ …
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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