Nanoelectronics Improved photo-ionization detector for detection of volatile organic compounds
Photoionization is a well-known process for soft, i.e. non-destructive, ionization of compounds. It is applied in commercial photoionization detectors (PIDs) for the detection of low-molecular weight compounds such as ammonia and arsine. The Applied Nano-Optics Laboratory has demonstrated a new type of electrode design for PIDs aimed at reduced contamination of the vacuum ultraviolet light source of the detector, a well know problematic issue in the operation of PIDs . Future work on this topic will continue in 2014 and focus on performance benchmarking of the new PID design against existing commercial solutions.
Figure 4 - Photo-ionization detector with patend electrode design
 P. A. A. De Beule, “Transmission window for a vacuum ultraviolet gas discharge lamp,” European Patent Office application (2013).