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Metal Nanoparticles

Contact

Prof. Dr. Niklas Nilius

Carl von Ossietzky Universität Oldenburg
Fakultät V - Institute of Physics
D-26111 Oldenburg
Germany

Tel.: +49-441-798-3152

Room: W2 3-327a

Secretary

Meike Hurling

Tel. +49-441-798-3453

Room: W2 1-133

Growth and Characterization of Metal Nanoparticles

  • Size and shape of metal particles governs their electronic and optical  properties as well as their chemical (catalytic) response
  • Particle nucleation on oxides preferentially occurs on defects and domain boundaries
  • Oxide doping enables control of the particle shapes

Metal Nanoparticles on MgO(001)

  • Particle geometry determined by interfacial adhesion, ionization potential of ad-metal and lattice match with the oxide support
  • Unusual crystal structures of nanoparticles to maximize metal-oxygen bonds across the interface

Ensemble of Mg particles and single hcp-type deposit grown on MgO (10×10 nm2)

For details: Growth and Morphology of Metal Clusters on MgO, Benedetti et al., Phys. Rev. B 83 (2011) 125423.

Gold Particles on Mo-doped CaO(001)

  • 3D growth of gold on pure CaO due to small metal-oxide adhesion
  • Charge transfer from Mo-dopants into gold increases adhesion and triggers formation of 2D particles

Gold deposition on pure and Mo-doped CaO films (100×100 nm2)

For details: Tailoring the Shape of Metal Particles by Doping the Oxide Support, Shao et al., Angew. Chem. Int. Ed. 50 (2011) 11525.

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