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Title: True Black Post by: MahrinSkel on June 02, 2008, 05:09:08 PM Not sure how many people are still around that remember the "True Black" exploit in UO Beta. You could hack a dye tub so it was 0,0,0 RGB, then dye clothing with it which would be completely black, no texturing, just a hole in the screen.
Well, somebody has done it for real (http://www.rdmag.com/ShowPR.aspx?PUBCODE=014&ACCT=1400000100&ISSUE=0805&RELTYPE=MS&PRODCODE=000000&PRODLETT=NF&CommonCount=0). 100% absorbtive nanomaterial across the entire visible spectrum. --Dave Title: Re: True Black Post by: Margalis on June 02, 2008, 05:15:16 PM Useless without picture.
Title: Re: True Black Post by: Trippy on June 02, 2008, 05:43:58 PM No pics because the description is incorrect. The visible spectrum is at around 500 THz. Their material is experimentally showing 88% absorbtion at 11.5 GHz or microwave frequencies, not visible light frequencies.
http://www2.bc.edu/~padillaw/PDF/PRL_100_207402_2008.pdf Title: Re: True Black Post by: Venkman on June 02, 2008, 06:08:28 PM So since this experiment absorbs the light by converting it to heat, is this the sort of thing that'd be good for solar panels? Or is there a lot more to it than just how much light can be absorbed and converted?
Title: Re: True Black Post by: bhodi on June 02, 2008, 07:02:16 PM So since this experiment absorbs the light by converting it to heat, is this the sort of thing that'd be good for solar panels? Or is there a lot more to it than just how much light can be absorbed and converted? It's incredibly useful on things where reflected light is bad, like the interior surfaces of telescopes. It would have to get better absorption than 88% for this, though. There was a nano-material that was some 99.X percent absorbed light that I saw an article on a while back.You might be able to use it as a sensing mechanism for specific wavelengths of light. Title: Re: True Black Post by: Trippy on June 02, 2008, 07:41:54 PM So since this experiment absorbs the light by converting it to heat, is this the sort of thing that'd be good for solar panels? Or is there a lot more to it than just how much light can be absorbed and converted? If enough money is poured into thermoelectric generator research maybe.Title: Re: True Black Post by: JoeTF on June 03, 2008, 10:51:25 AM So since this experiment absorbs the light by converting it to heat, is this the sort of thing that'd be good for solar panels? Or is there a lot more to it than just how much light can be absorbed and converted? It's very, very good for thermal cameras. Huh, they even say so in the text;-) Title: Re: True Black Post by: Furiously on June 10, 2008, 09:08:06 PM So, I'm likely to see this in my microwave popping popcorn in the near future?
Title: Re: True Black Post by: Lantyssa on June 11, 2008, 08:28:01 AM So, I'm likely to see this in my microwave popping popcorn in the near future? Or not see it. It absorbs light! ;DTitle: Re: True Black Post by: Nebu on June 11, 2008, 09:05:24 AM So since this experiment absorbs the light by converting it to heat, is this the sort of thing that'd be good for solar panels? Or is there a lot more to it than just how much light can be absorbed and converted? The thing you want from UV absorption is a high quantum yield of electronic excitation. Conversion of light to heat is easy. What you want in solar energy conversion is to capture UV/vis-induced photoexcited states and use these excited states for electron transfer events while losing little energy by radiative decay. Of course I'm no photochemist, but that's the process as I understand it. |