Detail publikačního výsledku

Detachment Limited Kinetics of Gold Diffusion through Ultrathin Oxide Layers

ČECHAL, J.; POLČÁK, J.; ŠIKOLA, T.

Originální název

Detachment Limited Kinetics of Gold Diffusion through Ultrathin Oxide Layers

Anglický název

Detachment Limited Kinetics of Gold Diffusion through Ultrathin Oxide Layers

Druh

Článek WoS

Originální abstrakt

Gold clusters and nanoparticles on ultrathin oxide layers are used as catalysts and represent essential parts of plasmonic and electronic devices. The stability of these nanostructures at surfaces against the diffusion of their constituents into the bulk is therefore of vital importance regarding their long-term applicability. Here, on the basis of in situ X-ray photoelectron spectroscopy measurements of gold diffusion through ultrathin oxide layers (SiO2 and Al2O3) to a Si substrate, we show that the diffusion from gold clusters/islands into the bulk is a detachment-limited process. Hence, the ultrathin oxide acts principally as a layer preventing a direct contact of metal atoms with the silicon substrate rather than a diffusion barrier. These findings contribute to a quantitative understanding of general design rules of metal/oxide structures.

Anglický abstrakt

Gold clusters and nanoparticles on ultrathin oxide layers are used as catalysts and represent essential parts of plasmonic and electronic devices. The stability of these nanostructures at surfaces against the diffusion of their constituents into the bulk is therefore of vital importance regarding their long-term applicability. Here, on the basis of in situ X-ray photoelectron spectroscopy measurements of gold diffusion through ultrathin oxide layers (SiO2 and Al2O3) to a Si substrate, we show that the diffusion from gold clusters/islands into the bulk is a detachment-limited process. Hence, the ultrathin oxide acts principally as a layer preventing a direct contact of metal atoms with the silicon substrate rather than a diffusion barrier. These findings contribute to a quantitative understanding of general design rules of metal/oxide structures.

Klíčová slova

Oxide Layers; Diffusion; Gold Clusters; Nanoparticles, Atomic Layer Deposition, ALD; Surface Processes

Klíčová slova v angličtině

Oxide Layers; Diffusion; Gold Clusters; Nanoparticles, Atomic Layer Deposition, ALD; Surface Processes

Autoři

ČECHAL, J.; POLČÁK, J.; ŠIKOLA, T.

Vydáno

07.08.2014

ISSN

1932-7447

Periodikum

Journal of Physical Chemistry C

Svazek

118

Číslo

31

Stát

Spojené státy americké

Strany od

17549

Strany do

17555

Strany počet

7

BibTex

@article{BUT108725,
  author="Jan {Čechal} and Josef {Polčák} and Tomáš {Šikola}",
  title="Detachment Limited Kinetics of Gold Diffusion through Ultrathin Oxide Layers",
  journal="Journal of Physical Chemistry C",
  year="2014",
  volume="118",
  number="31",
  pages="17549--17555",
  doi="10.1021/jp5031703",
  issn="1932-7447"
}