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Knut Deppert

Knut Deppert


Knut Deppert

A Continuous One-Step Aerosol Method for Producing Core@Shell Cu@Ag Nanoparticles


  • Namsoon Eom
  • Markus Snellman
  • Martin Ek
  • Maria Messing
  • Knut Deppert

Summary, in English

The synthesis of core@shell nanoparticles has predominantly been carried out by chemical methods or physical deposition of a shell material post-growth onto core particles. By combining immiscible materials that differ in surface energy, we demonstrate the spontaneous atomic rearrangement to monodisperse Cu@Ag core@shell particles directly in the aerosol phase, starting from pure Cu and Ag electrodes with the spark discharge generation (SDG) method. The morphology and crystallinity were investigated by SEM and HRTEM, and the composition was confirmed by STEM EDX, which indicated that the Ag shell acts as an oxidation barrier for the Cu core. The current material system may find applications in antibacterial coatings. The method presented can be extended to other bimetallic systems with applications in catalysis, plasmonics and as seed-particles for nanowire growth. Owing to the simple, zero-waste and continuous production method, SDG is an ideal platform for such nanoparticle generation and investigation.


  • Solid State Physics
  • NanoLund
  • Centre for Analysis and Synthesis
  • Synchrotron Radiation Research

Publishing year




Document type

Conference paper: abstract


  • Chemical Sciences

Conference name

European Aerosol Conference 2019

Conference date

2019-08-25 - 2019-08-30

Conference place

Gothenburg, Sweden