Carbon nanotubes are the blackest material I have ever seen. Absolutely Lovecraftian structure.pic.twitter.com/mZHiHnINGA
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Carbon nanotubes are the blackest material I have ever seen. Absolutely Lovecraftian structure.pic.twitter.com/mZHiHnINGA
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
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
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.
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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