from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry Any of a class of
electroluminescent aromatic polycyclic hydrocarbonsconsisting of many fluoreneunits attached end-to-end
Sorry, no etymologies found.
In mid-2010, Dr Turnbull and his team developed laser technology able to sense hidden explosives by "pumping" a type of plastic called polyfluorene with photons from another light source.
The laser sensor, developed by physicists from the University of St Andrews in Fife, Scotland, relies on the fact that when a type of plastic called polyfluorene is "pumped" with photons of light from a light source it emits laser light.
Graham Turnbull, a physicist at the University of St Andrew's in Fife, UK, and colleagues have developed a device that uses a film of polyfluorene, a plastic that emits laser light when bathed in photons.
Dr. Turnbull said that while similar techniques using organic semiconductor lasers had been looked at before, this is the first time scientists have used a polyfluorene laser, and its use enables much lower concentrations of vapors to be detected.
The same electron-transfer effect occurs with the new polyfluorene laser.
After 4-5 minutes the response had slowed and then flattened off, which the researchers suggest is due to the vapor molecules interacting with the surface of the polyfluorene.
The plastic polyfluorene is a cheap material, which is an obvious advantage for a device designed to detect explosives.
Using a thin film of polyfluorene (essentially a light-emitting plastic) the group has created a laser that reacts with vapours from explosives.