Scientists using an iridium complex have been able to build a prototype instrument to test a variety of pharmaceutical substances.

A nanostructure is laid onto the surface of a micro-sensor as a layer of luminescent material that is based on an iridium complex.

The pocket sized instrument works by measuring the light from the surface of the sensor.

The luminescent material is stimulated to release photons when an analyte is present, the amount of light given off is then related to its concentration, making it possible to detect lower levels of concentration.

Dr Conor Hogan of La Trobewho is working on the research and told Science Alert that he wanted to make a device that could be used by scientists on the go or doctors needing immediate results.

His research is different to the tradition of luminescence spectroscopy because an electrical pulse is used to stimulate the molecules.

"This has an advantage because light is scattered and detectors pick it up as interference. With our method, it is possible to detect lower levels of concentration of these substances," he said.



Source:

Coaxing molecules into new sensors, 25/07/08
http://www.sciencealert.com.au/features/20082507-17701.html