For those of you who are saying that it would be hella expensive, you must have not made it to the end.
Quote:
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Dr Chon says that the material cost of a disc would be less than $0.05 (£0.03), but there are a number of advantages in moving to silver nano-rods that would bring that cost down by a factor of 100.
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I'll spot you the nickel if you want the gold disc, or the fraction of a penny if you want the silver disc.
EDIT: Keep in mind, I read somewhere that it costs 4 cents to make a penny, and 7 cents to make a nickel. This is why they were considering doing away with the penny, but everybody freaked out.