Counting microbes on a smartphone

An Android application could dramatically change how microbiologists quantify data and how they go about their work.

Researchers surprised at the unexpected hardness of gallium nitride

Gallium nitride (GaN) has emerged as one of the most important and widely used semiconducting materials. Its optoelectronic and mechanical properties make it ideal for a variety of applications, including light-emitting diodes ...

Building blocks for GaN power switches

A team of engineers from Cornell University, the University of Notre Dame and the semiconductor company IQE has created gallium nitride (GaN) power diodes capable of serving as the building blocks for future GaN power switches—with ...

The microscopic origin of efficiency droop in LEDs

Light-emitting diodes—or LEDs, as they are commonly known—have been slowly replacing incandescent light bulbs in applications ranging from car taillights to indicators on electronics since their invention in the 1960s.

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