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Researchers develop 25TB titanium-oxide disc


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A team of Japanese researchers has created a material that could be used to manufacture a low-price "super disc" with a capacity of 25 terabytes.

The material - which AFP described as a new crystal form of titanium oxide - is reportedly capable of switching back and forth between metal and semiconductor states when exposed to light.
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"A material that changes color with light can be used in storage devices, as colors reflect light differently to contain different information. promising as a material for a next-generation optical storage device," Shin-ichi Ohkoshi, chemistry professor at the University of Tokyo, told AFP.

"[And] Titanium oxide's market price is about one-hundredth of the rare element - germanium-antimony-tellurium - that is currently used in rewritable Blu-ray discs and DVDs. [So], you don't have to worry about procuring rare metals. Titanium oxide is cheap and safe, already being used in many products ranging from face powder to white paint."

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