US researchers have developed a new type of semiconductor ink that brings companies a step closer to making bendable computer screens or inexpensive sensor tags to help retailers keep track of their inventory. The discovery lies in the new material &8212; a soluble semiconductor ink capable of carrying a negative electrical charge, said Philippe Inagaki, chief executive officer of Polyera Corp, a specialty chemicals company in Skokie, Illinois, that makes materials for flexible and printed electronics
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