Vibrational analysis of H2 and NH3 adsorption on Pt/SiO2 and Ir/SiO2 model sensors
Paper i proceeding, 2007

The sensing mechanism of metal insulator silicon-based field effect transistor devices (MISFET) for H2 and NH3 detection has been studied for Pt/SiO2 and Ir/SiO2 model sensors with in situ infrared spectroscopy and density functional theory calculations (DFT). The spectroscopy experiments showed reversible formation of isolated OH groups on the silica surface upon H2 or NH3 exposure. In addition, an intense broad band was observed around 3270 cm(-1). Supported by the calculations, this band was assigned to perturbed OH groups on the silica surface. These results strongly indicate that dissociation and spill-over of hydrogen occurs during exposure of Pt/SiO2 and Ir/SiO2 to H2 or NH3. These results indicate a common sensing mechanism for hydrogen and ammonia.

Sensor

Ammonia

Hydrogen

Författare

Mikaela Wallin

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Marielle Byberg

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Henrik Grönbeck

Chalmers, Teknisk fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Mats Eriksson

Linkopings universitet

Anita Lloyd Spetz

Linkopings universitet

2007 IEEE Sensors

1930-0395 (ISSN)

Vol. 1-3 1315-1317

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Analytisk kemi

Atom- och molekylfysik och optik

Materialkemi

Annan kemiteknik

DOI

10.1109/ICSENS.2007.4388652

ISBN

978-1-4244-1261-7