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Gallium Arsenide is an interesting compound in that it directly transforms electricity into light.
If we made a Gallium-Arsenide paint and painted it over a wall with electrodes, the walls would glow at the flip of a switch.
Gallium Arsenide is toxic, so we would need to paint over the walls with
sealant and add a simple warning saying:
"Do not eat the walls!"
You would never have to replace a lightbulb again!
Gallium Arsenide
http://en.wikipedia...ki/Gallium_arsenide
Stuff about it [DesertFox, Jan 28 2005]
[link]
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Indeed . . . lead-based paint would now be replaced with a material "considered highly toxic and carcinogenic." [-wikipedia] Maybe you could laminate it.
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How's the game going? |
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It works the other way too - GaAs semiconductor crystals are sometimes used as gamma spectroscopy detectors. |
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But if you've got the sign...
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Too bad galluim is three times the price of silver. |
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Hell, we've painted with lead and insulated with asbestos, why not! |
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It should be pointed out that the light-producing effect of gallium asenide only occurs in monocrystalline forms, and that crack and crystal boundaries give ample opportunity for current to return without effect. Making either thin films or monocrystals is going to raise the price some... |
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