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Recent steps in improving yield and stability of magnetron cluster source and applications

Mercoledì 15 maggio 2019, ore 14.30, aula Seminari, terzo piano, edificio Fisica, Dipartimento FIM, Modena.

Relatore: Prof. Y. Huttel (Istituto de Cienca de Materiales de Madrid).

Abstract:  Since its birth [1], magnetron based cluster beam deposition has demonstrated to be a unique tool for the fabrication of pristine nanoparticles of high interest for fundamental studies as well as for technological applications. Surprisingly the gas aggregation sources (GAS) have not penetrated yet the industrial sector although their use for several applications has been proposed.
In this talk I will discuss some of the issues of the GAS that may explain why they are not implemented in industrial processes as the limitation of the yield of nanoparticles and the short time stability. Possible solutions to overcome these limitations will be presented like the use of a Full Face Erosion magnetron and the injection of controlled doses of gas impurities [2,3]. I will show that stable and high fluxes of nanoparticles open the route to the fabrication of three-dimensional coral-like structures that present a high effective surface.
Finally I will present three applications where nanoparticles generated by GAS have been used for high performance scanning probes [4], nanomedicine and photocatalysis.

References
[1] H. Haberland et al., Z. Phys. D: At., Mol. Clusters 20, 413 (1991).
[2] "Gas Phase Synthesis of Nanoparticles”, Wiley-VCH Verlag GmbH, 2017.
[3] Y. Huttel et al., MRS Communications 8, 947 (2018).
[4] L. Martínez et al., Review of Scientific Instruments, 82, 023710 (2011).

Host: S. D'Addato.

[Ultimo aggiornamento: 13/05/2019 15:54:40]