The Only Book You'll Ever Need?

MASSACHUSETTS INSTITUTE OF Technology researchers are developing an electronic book that looks and feels like an ordinary hardcover. Joseph Jacobson, the physicist heading the project, says the key is "digital" ink particles, 50 microns in diameter, which resemble the toner in laser printers and adhere to a paper-like synthetic substrate. The particles--black on one side, white on the other--flip over when stimulated by an electric charge, just as tiny crystals change position to block or release light in liquid-crystal displays.

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