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Enhancing composition control of alloy nanoparticles from gas aggregation source by in operando optical emission spectroscopy
Author(s) -
Drewes Jonas,
Vahl Alexander,
Carstens Niko,
Strunskus Thomas,
Polonskyi Oleksandr,
Faupel Franz
Publication year - 2021
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202000208
Subject(s) - alloy , nanoparticle , materials science , composition (language) , spectroscopy , chemical engineering , gas composition , analytical chemistry (journal) , nanotechnology , chemistry , metallurgy , environmental chemistry , linguistics , philosophy , physics , quantum mechanics , engineering , thermodynamics
The use of multicomponent targets allows the gas‐phase synthesis of a large variety of alloy nanoparticles (NPs) via gas aggregation sources. However, the redeposition of sputtered material impacts the composition of alloy NPs, as demonstrated here for the case of AgAu alloy NPs. To enable NPs with tailored Au fractions, in operando control over the composition of the NPs is in high demand. We suggest the use of optical emission spectroscopy as a versatile diagnostic tool to determine and control the composition of the NPs. A strong correlation between operating pressure, intensity ratio of Ag and Au emission lines, and the obtained NP compositions is observed. This allows precise in operando control of alloy NP composition obtained from multicomponent targets.