O wonder if they could use this to absorb sun light and transform into heat and generate electricity. Looking into the absorption rates in the chart, it’s clear that it would be 30x more efficient than solar panels these days.
New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
51–60 of 69 posts
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#52Earlier quoted context omitted.
Painting your car in it to avoid lidar
I can't imagine the temperature of that car after sitting in the sun for an hour.
It radiates more too. The steady state temperature of the steel plates will be the same as white paint, right?
I assume the AC has to work a little bit more during driving though.
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#53Can someone please explain to me the race to the blackest black?
Oh god. We developed the blackest tshirt in the world. So I know much more about this subject than what is possibly good for my mental health lol
I made a comparison video about the ultra blacks that are freely available https://youtu.be/ElVzQ2M6vh0
Regarding VB and the MIT stuff, they are hi-tech and useful for optical applications like space telescopes.
Interestingly, the creator of Vantablack told me that there are also some export restrictions due to it's possible usefulness in stealth technology where you want to get rid of stray light.
Let me know if you have additional questions
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#54Earlier quoted context omitted.
I love this line of thinking!! Also, if i were to dimple an an entire plane’s body like a golf ball, and paint it with this... how stealthy would that be?
Oh, about as stealthy as a metal golf ball, painted black? Put it this way: If you shine a flashlight at a cosmetic hand mirror, does the flashlight shine back and hit you in the eyes? Now tilt the mirror so that the flashlight doesn't blind you. Stealth surfaces are supposed to work like a tilted mirror. Now imagine a polished chrome golf ball. If you shine a flashlight at it, you'll still catch a bounce from the fl…
Thats not exactly accurate. Those nanotube coatings are optimised so it traps the light entirely
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#55Serious question: How do these materials both perform against radar? Will we be seeing them as stealth paints on planes or satellites?
Follow-up serious question: if I paint my car with this stuff, can a policeman tag me with his radar gun? If I wear clothes impregnated with it, would it confuse a "smart" surveillance camera? I'm also thinking if I used it as war paint, a facial recognition cam would probably be awfully confused by what appears to be a hole in my face.
Just send the "reflection" back at the donuts connoisseur before the real reflection does and your objective has been reached. Ready made devices for exactly this purpose exist and are dirt cheap.
While we're at it, the photonic equivalent can be beaten by means of special reflective coating. One that whites out the entire photo using the received "flash". Needless to say, this is also widely available & dirt cheap.
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#56O wonder if they could use this to absorb sun light and transform into heat and generate electricity. Looking into the absorption rates in the chart, it’s clear that it would be 30x more efficient than solar panels these days.
solar panels are way more efficient than 3.333... % , so no, nothing can be 30x more efficient than solar panels these days.
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#57It is stated to be an order of magnitude better across the broad spectrum than other broad absorbers. I wonder if there are any narrow bands that it specifically excels at compared to existing materials, and how big the difference is.
This is the relevant graph I think: https://i.ibb.co/129RQK9/Screenshot-20190915-124224-2.png
They are potentially misleading by connecting the dots in that way. (The classic, it implies data where there is nothing.)
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#58Can someone please explain to me the race to the blackest black?
I'm wondering if one use could be solar ovens.
Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#59Re: New carbon nanotube-metal hierarchical material is 10x darker than Vantablack
#60Could such a material be put behind (and be protected by) glass and still have the desired properties?