Original title: LAYERS OF METALS NANOPARTICLES ON VARIOUS SEMICONDUCTORS FOR HYDROGEN DETECTION
Authors: Černohorský, Ondřej ; Žďánský, Karel ; Yatskiv, Roman ; Grym, Jan
Document type: Papers
Conference/Event: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Year: 2012
Language: eng
Abstract: Metal nanoparticles have many interesting properties which is given by their space restriction. Their large active surface is very well exploited during catalysis. Pd and Pt are metals know for their ability to dissociate molecular hydrogen on single atoms. We prepared Schottky diodes on semiconductors InP, GaN, GaAs, and InGaAs to obtain hydrogen sensor. Method of preparation such diodes is electrophoretic deposition of Pd or Pt nanoparticles from their colloid solution onto semiconductor substrate. Over the layer of nanoparticles, porous metal contact was prepared. Hydrogen molecules are dissociated on these metal nanoparticles and single atom which settles on the interface between metal and semiconductor and they increase or decrease Schottky barrier height. By this method we can measure from 1 ppm H2 in the air, where the current change is over one order of magnitude
Keywords: binary semiconductors; metal nanoparticles; Schottky barrier
Project no.: GA102/09/1037 (CEP)
Funding provider: GA ČR
Host item entry: NANOCON 2012, 4th International Conference Proceedings, ISBN 978-80-87294-32-1

Institution: Institute of Photonics and Electronics AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0216629

Permalink: http://www.nusl.cz/ntk/nusl-136084


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Research > Institutes ASCR > Institute of Photonics and Electronics
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