Self-Erasing Documents Powered By Disappearing NanoparticlesFrom Popsci.com:
Researchers are harnessing nanoparticle properties to develop fading ink.
Remember when, as a kid, you would pass “top-secret” notes written in lemon juice that your friends could only read in the right light? Well, in light of new nanotechnology research, this now sounds absurdly antiquated, like cave painting in the modern era. Instead, the youth of the future (and adults, too) could have to option to communicate via documents that self-erase at a programmed time.
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