Vantablack
Synthetic material, one of the darkest substances known / From Wikipedia, the free encyclopedia
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Vantablack is a class of super-black coatings with total hemispherical reflectances (THR) below 1%[4] in the visible spectrum. The name is a combination of the acronym VANTA (vertically aligned nanotube arrays)[5] and the shade black.
| Names | |
|---|---|
Other names
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| Identifiers | |
| Properties | |
| C | |
| Appearance | Solid black coating |
| Density | 2.5 mg/cm3 |
| Melting point | >3,000 °C (5,430 °F; 3,270 K) |
| Insoluble | |
| Hazards | |
| GHS labelling: | |
 | |
| Warning | |
| H319, H335 | |
| P261, P281, P305+P351+P338 | |
| NIOSH (US health exposure limits): | |
REL (Recommended) |
<1 μg/m3 over an 8-hour TWA |
| Safety data sheet (SDS) | CAS 308068-56-6 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The original Vantablack coating was grown from a chemical vapour deposition process (CVD) and is claimed to be the "world's darkest material", absorbing up to 99.965% of visible light measured perpendicular to the material.[6][7] The coatings are unique in that they are super-black and retain uniform light absorption from almost all viewing angles. Original CVD Vantablack is no longer manufactured for commercial applications as it has been superseded by Vantablack spray coatings that offer similar optical performance in key parts of the electromagnetic spectrum.[8]