Ultrasensitive Sensor with Gold Nanoparticle Array

Physicists have developed a new type of sensor platform using a gold nanoparticle array that is 100 times more sensitive than current similar sensors. The sensor is made up of a series of gold disk-shaped nanoparticles on a glass slide. The team discovered that when they shone an infrared laser at a precise arrangement of the particles, they started to emit unusual amounts of ultraviolet (UV) light.