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Palladium nanoparticles on InP for hydrogen detection

Ondrej Cernohorsky12*, Karel Zdansky2, Jiri Zavadil2, Pavel Kacerovsky2 and Katerina Piksova1

Author Affiliations

1 Department of Physical Electronics, Czech Technical University, V Holesovickach 2, Prague, Czeck Republic

2 Institute of Photonics and Electronics, Academy of Sciences of the Czech Republic, Chaberska 57, Prague, Czeck Republic

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Nanoscale Research Letters 2011, 6:410  doi:10.1186/1556-276X-6-410

Published: 2 June 2011


Layers of palladium (Pd) nanoparticles on indium phosphide (InP) were prepared by electrophoretic deposition from the colloid solution of Pd nanoparticles. Layers prepared by an opposite polarity of deposition showed different physical and morphological properties. Particles in solution are separated and, after deposition onto the InP surface, they form small aggregates. The size of the aggregates is dependent on the time of deposition. If the aggregates are small, the layer has no lateral conductance. Forward and reverse I-V characteristics showed a high rectification ratio with a high Schottky barrier height. The response of the structure on the presence of hydrogen was monitored.