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2010-02-09   
2009-08-19

Rewritable Paper and Salty Ink

Rewritable Paper and Salty Ink

Given their optical response to external stimuli, photonic crystals have long been known to hold a great deal of potential in fields such as electronics, sensors, and display technology. Now, a team from the University of California have developed photonic-crystal based paper, which can be "written" by using a hygroscopic-salt-based ink solution. This ink swells the matrix of crystals, causing diffraction contrasts that appear as markings, and can be removed simply by rinsing in water and drying.

This work has also been featured in a spotlight article by nanowerk.com; you can read the spotlight here.


Y. Yin et al., Adv. Mater. ; DOI: 10.1002/adma.200901562


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