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A comment on New carbon nanotube-metal hierarchical material is 10x darker than Vantablack. Parent comment

Re:New carbon nanotube-metal hierarchical material is 10x da... by SamReidHughes on Sunday September 15, 2019 @12:11AM (#20975536)
There is a piece of domed sapphire in front of it with an imperfect anti reflective coating.
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