P2.4.15 A Miniaturized Catalytic Gas Sensor with Functionalized Nanoparticles as Catalytic Layer
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.4 Nanostructured Sensors
- E. Brauns, W. Lang - IMSAS (Institute for Microsensors, -actuators and -systems), University of Bremen (Germany), E. Morsbach, G. Schnurpfeil, M. Bäumer - IAPC (Institute of Applied and Physical Chemistry), University of Bremen (Germany)
- 1546 - 1549
This paper presents a miniaturized catalytic gas sensor for hydrogen detection based on functionalized platinum nanoparticles as catalytic layer. Due to the high surface of nanoparticles, the sensitivity of the catalytic layer is increased while the amount of material is decreased. Lower gas concentrations should be measurable. Furthermore, the nanoparticles are enclosed by a ligand shell, which provides a higher stability than nanoparticles without stabilization, because of better adhesion to the substrate and less agglomeration. A novel sensor design allows a better controlling of the catalytic temperature, which also improves the stability of the sensor. High sensitivity and fast response are possible. Long-term stability is reviewed and improved.