Scientific research at the National Taiwan University has led to the development of quantum dots containing iridium complexes.

The dots, which can be used in bio-imaging, diagnostics and as photosensitising agents, have the potential to be effective in the treatment of cancer through photodynamic therapy (PDT).

PDT uses photosensitising agents to produce toxins which kill cancer cells and is a less invasive form of treatment for sufferers than radiation therapy or surgery, according to Chemical Technology.

Following previous failures in the use of quantum dots, the findings are seen as significant and initial results show that the new luminescent dots emit high enough levels to be picked up in medical imaging, while the iridium complexes can lead to the production of the required toxins when exposed to light.

Pi-Tai Chou, involved in the research, welcomed the findings and said: "This system should greatly extend the usefulness in both research fields of bio-imaging and photodynamic therapy."

Further research will focus on the development of a system that allows cell recognition in the quantum dots, adding to the existing properties.

Ÿ Adfero Ltd