2024-03-29T08:18:45Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1658122022-12-21T12:43:55Zcom_10261_44com_10261_4com_10261_89com_10261_3com_10261_135col_10261_423col_10261_468col_10261_514
Martínez-Orellana, Lidia
Lauwaet, Koen
Santoro, Gonzalo
Sobrado, Jesús Manuel
Peláez, Ramón J.
Tanarro, Isabel
Cernicharo, José
Huttel, Yves
Martín-Gago, José A.
Joblin, C.
2018-06-06T14:48:35Z
2018-06-06T14:48:35Z
2017-06-12
Workshop Formation and Processing of Cosmic Dust Analogues (2017)
http://hdl.handle.net/10261/165812
http://dx.doi.org/10.13039/501100000780
Gas aggregation sources are undoubtedly of attracting interest as an alternative route for
nanoparticle fabrication. This is mainly due to the fact that it is a technique able to fabricate
nanoparticles with controlled size and composition in clean environment (high or ultra-high
vacuum). Among different types of gas aggregation sources, the ones based on sputtering are
the most popular mainly due to the important proportion of ionized nanoparticles produced,
which allows mass/charge selection by using a quadrupole. In the framework of the European
project ERC Synergy Grant ¿Gas and dust from stars to the laboratory: Exploring the
NANOCOSMOS¿, we are building the Stardust machine, designed to simulate in the
laboratory the formation of nanoparticles, small clusters and molecules in the photosphere of
a red-giant star. The first part of Stardust, where the seed formation of dust analogs is
produced, is an implementation of a sputtering gas aggregation source called Multiple Ion
Custer Source (MICS). In it, we try to reproduce the condensation sequence in which atoms
of the refractory materials start aggregating to create clusters and its growth to nanoparticles.
The MICS consists in three completely independent magnetrons inside an aggregation zone.
With it, it is possible to fabricate nanoparticles of controlled size, composition and structure
in ultra-high vacuum. Previous works demonstrated that with this equipment it is possible to
fabricate nanoparticles of a single element, alloyed nanoparticles with controlled
stoichiometry, as well as core@shell nanoparticles. For the Stardust machine, the size of the
magnetrons and the aggregation zone were scaled up in order to be able to fabricate
nanoparticles of bigger sizes in larger quantities (high flux). The aggregation zone includes
new entrances that will enable to perform new fundamental research. We will present the
experiments carried out during the commissioning of Stardust in order to test some of the
capabilities of the equipment, focusing on the generation of nanoparticles / dust analogs.
eng
openAccess
Dust seed formation using an adjustable multi-magnetron gas aggregation source
comunicación de congreso