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Palladium nanoparticles on InP for hydrogen detection.

Cernohorsky O, Zdansky K, Zavadil J, Kacerovsky P, Piksova K - Nanoscale Res Lett (2011)

Bottom Line: The size of the aggregates is dependent on the time of deposition.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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Physical Electronics, Czech Technical University, V Holesovickach 2, Prague, Czeck Republic. cernohorsky@ufe.cz.

ABSTRACT
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.

No MeSH data available.


I-V characteristics of ND Pd layers. Higher curve is for forward bias and the lower for reverse bias.
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Figure 2: I-V characteristics of ND Pd layers. Higher curve is for forward bias and the lower for reverse bias.

Mentions: A colloid graphite paint used for contacts makes a good Schottky barrier on an InP without a Pd layer, in contrast to formerly used colloid silver paint. I-V characteristics (Figure 2) of the ND Pd layer with graphite contact exhibit a large rectification ratio and linear part gives Schottky barrier height 0.85 eV. Although an SIMS revealed less Pd isotopes on the ND layers, they have better rectifying ratios and sensing capabilities. We suppose that this fact is due to less coverage of the InP surface in combination with the porosity and high Schottky barrier of the graphite colloid paint on the InP.


Palladium nanoparticles on InP for hydrogen detection.

Cernohorsky O, Zdansky K, Zavadil J, Kacerovsky P, Piksova K - Nanoscale Res Lett (2011)

I-V characteristics of ND Pd layers. Higher curve is for forward bias and the lower for reverse bias.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211506&req=5

Figure 2: I-V characteristics of ND Pd layers. Higher curve is for forward bias and the lower for reverse bias.
Mentions: A colloid graphite paint used for contacts makes a good Schottky barrier on an InP without a Pd layer, in contrast to formerly used colloid silver paint. I-V characteristics (Figure 2) of the ND Pd layer with graphite contact exhibit a large rectification ratio and linear part gives Schottky barrier height 0.85 eV. Although an SIMS revealed less Pd isotopes on the ND layers, they have better rectifying ratios and sensing capabilities. We suppose that this fact is due to less coverage of the InP surface in combination with the porosity and high Schottky barrier of the graphite colloid paint on the InP.

Bottom Line: The size of the aggregates is dependent on the time of deposition.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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Physical Electronics, Czech Technical University, V Holesovickach 2, Prague, Czeck Republic. cernohorsky@ufe.cz.

ABSTRACT
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.

No MeSH data available.