DEPOSITION OF PVP-PROTECTED PLATINUM NANOPARTICLES ON SEMICONDUCTOR SUBSTRATES FOR HYDROGEN SENSING

0457757 - ÚFE 2016 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Černohorský, Ondřej - Yatskiv, Roman - Grym, Jan
DEPOSITION OF PVP-PROTECTED PLATINUM NANOPARTICLES ON SEMICONDUCTOR SUBSTRATES FOR HYDROGEN SENSING.
NANOCON 2014. 6th International conference proceedings. Ostrava: TANGER, 2015, s. 231-234. ISBN 978-80-87294-53-6.
[NANOCON 2014. International Conference /6./. Brno (CZ), 05.11.2014-07.11.2014]
Grant ostatní: GA AV ČR(CZ) M100671201
Institucionální podpora: RVO:67985882
Klíčová slova: Graphite based Schottky junction * PVP - protected Pt nanoparticles * Hydrogen sensors
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

High quality Schottky diode hydrogen sensors were prepared by the deposition of colloidal graphite on n-type InP substrates partly covered with PVP-protected Pt nanoparticles (NPs). A sub-monolayer of the Pt NPs was created by simple evaporation of the solvent in which Pt NPs were dispersed. The Pt NPs serve to dissociate hydrogen molecules into atomic hydrogen, which is absorbed at the metal-semiconductor interface. Hydrogen absorption leads to the formation of the dipole layer, which changes the Schottky barrier height and results in the increase of both forward and reverse current. The proposed hydrogen sensor showed high sensitivity response of similar to 10(6) to 1000 ppm H-2 in N-2 at room temperature
Trvalý link: http://hdl.handle.net/11104/0258108