Junyi Zhao in the McKelvey School of Engineering demonstrates using a simple ballpoint pen to write custom LEDs on paper (left). The same pens can be used to draw multicolored designs on aluminum foil ...

These pens go by many names around the world, but they're known mainly by two monikers. One is "ballpoint pen," which describes the principle behind it, and "biro," which is the name of the man who ...

Researchers working with Chuan Wang, associate professor of electrical & systems engineering, have developed ink pens that allow individuals to handwrite flexible, stretchable optoelectronic devices ...