6.3.4 Noble Metal Added Tin Oxide VOC Sensors as Nonanal Detection for Exhaled Breath Air Monitoring

Toshio Itoh, Takaomi Nakashima, Noriya Izu, Woosuck Shin, Yasuhiro Setoguchi, Kimiko Kato & Masashi Toyota
We have investigated the VOCs-sensing properties of Pt, Pd, Au-loaded SnO2 thick film for exhaled breath air. It has been reported that breaths of lung cancer patients include long methylene chain-aldehydes, such as nonanal. The Pt, Pd, Au-loading for SnO2 type gas sensors is advantage for detect to low concentration VOCs. The Pt,Pd,Au/SnO2 element shows higher response to nonanal than a non-loaded SnO2 element. The combustion of nonanal molecules on the surface of SnO2 grains...