Název:
LAYERS OF METALS NANOPARTICLES ON VARIOUS SEMICONDUCTORS FOR HYDROGEN DETECTION
Autoři:
Černohorský, Ondřej ; Žďánský, Karel ; Yatskiv, Roman ; Grym, Jan Typ dokumentu: Příspěvky z konference Konference/Akce: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Rok:
2012
Jazyk:
eng
Abstrakt: 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
Klíčová slova:
binary semiconductors; metal nanoparticles; Schottky barrier Číslo projektu: GA102/09/1037 (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: NANOCON 2012, 4th International Conference Proceedings, ISBN 978-80-87294-32-1
Instituce: Ústav fotoniky a elektroniky AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný na vyžádání prostřednictvím repozitáře Akademie věd. Původní záznam: http://hdl.handle.net/11104/0216629