Vibrational analysis of H2 and NH3 adsorption on Pt/SiO2 and Ir/SiO2 model sensors
Paper in proceedings, 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.

Hydrogen

Ammonia

Sensor

Author

Mikaela Wallin

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Marielle Byberg

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Henrik Grönbeck

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Mats Eriksson

Linköping University

Anita Lloyd Spetz

Linköping University

2007 IEEE Sensors

1930-0395 (ISSN)

Vol. 1-3 1315-1317

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Analytical Chemistry

Atom and Molecular Physics and Optics

Materials Chemistry

Other Chemical Engineering

DOI

10.1109/ICSENS.2007.4388652

ISBN

978-1-4244-1261-7

More information

Latest update

2/28/2018