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Knut Deppert

Knut Deppert

Professor

Knut Deppert

Magnetic-field directed self-assembly and chain formation of functional aerosol nanoparticles

Author

  • Knut Deppert
  • Calle Preger
  • Martin Josefsson
  • Rasmus Westerström
  • Maria Messing

Summary, in English

Self-assembly of nanoparticles into vertical structures or larger ensembles can be a powerful method to achieve a strong collective behavior while still obtaining many of the same properties of the individual nanoparticles. In this study, we achieve directed self-assembly of magnetic nanoparticles into nanochains when depositing in a combined magnetic and electric field (M-ESP). We show that the Co nanoparticles are spontaneously magnetized in the aerosol phase, and that the role of the external magnetic field is mainly to guide the deposition in a certain direction.
Lastly, we will present chain formation of mixed materials. Here, we combine a strong magnetic material, with other elements to achieve the same chain structure, but with a desired surface functionalization. Nanoparticle chains can therefore be formed with different functionalities, depending on the mixing material. This opens up for further combination to tune the functionalization of the nanoparticle chain structure.

Department/s

  • Solid State Physics
  • NanoLund
  • Synchrotron Radiation Research

Publishing year

2020-08-31

Language

Swedish

Document type

Conference paper: abstract

Topic

  • Nano Technology

Conference name

European Aerosol Conference 2020

Conference date

2020-08-31 - 2020-09-04

Conference place

Aachen, Germany

Status

Published