This Tiny Quantum Sensor Glows on Its Own to Detect the Nearly Invisible

Scientists at EPFL have created a revolutionary biosensor that doesn’t need a light source—it makes its own glow using quantum tunneling. By guiding electrons through a nanostructure of gold and aluminum oxide, the sensor emits light and detects molecules at astonishingly small concentrations, down to a trillionth of a gram. With no bulky equipment, it [...]