Brauns E.,Institute for Microsensors actuators And systems IMSAS |
Morsbach E.,Institute of Applied and Physical Chemistry IAPC |
Baumer M.,Institute of Applied and Physical Chemistry IAPC |
Lang W.,Institute for Microsensors actuators And systems IMSAS
2013 Transducers and Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013 | Year: 2013
This paper presents a miniaturized catalytic gas sensor for hydrogen detection. Due to its micro technological design and high porous nanoparticle based platinum catalyst, a very short response time 150 ms and a high sensitivity of about 2.2 mV / 100 ppm hydrogen is achieved, whereat the power consumption is very low. The nanoparticles are stabilized by functionalization with an organic network of surfactants adsorbed on the nanoparticle's surface. In this way a distinct improvement of the long-term stability can be observed. Nanoparticle based structures or porous structures without this stabilization suffer from degradation as a result of agglomeration. © 2013 IEEE.