Octopart on “The Secret Life Of Gold”… Harish writes –
Gold is an oft coveted material. Countries have been conquered in pursuit of gold, and men have been browbeaten to buy jewelry constructed from it. To the technically minded, however, gold is more than currency, more than a neckalace to show off to your friends. Electronics enthusiasts already know that gold is very practical, found in everything from electronic contacts to thin films on DVDs. As a grad student, I learned to look at gold in a completely different light – as an optical bio-sensor for small distances.
The secret life of gold – Link.