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Plasma‐assisted gas‐phase synthesis and in‐line coating of silicon nanoparticles
Author(s) -
Dasgupta Malini,
Fortugno Paolo,
Wiggers Hartmut
Publication year - 2020
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.201900245
Subject(s) - hexamethyldisiloxane , coating , tetraethyl orthosilicate , octamethylcyclotetrasiloxane , nucleation , materials science , nanoparticle , chemical engineering , surface modification , silicon , nanotechnology , plasma , chemistry , organic chemistry , polymer chemistry , metallurgy , physics , quantum mechanics , engineering
This study investigates the feasibility of plasma‐supported in‐line functionalization of silicon nanoparticles (NPs) in an atmospheric pressure gas‐phase reactor. The approach utilizes the synthesis of core silicon NPs and their subsequent coating downstream of the particle formation zone. In‐line coating is accomplished with a cylindrical coating nozzle to achieve homogenous mixing of coating precursor vapors with in‐coming NPs. Multiple siloxanes were tested for their coating suitability and their ability towards coating homogeneity. It was found that tetraethyl orthosilicate is favored for thin layers consisting of almost pure silica while hexamethyldisiloxane and octamethylcyclotetrasiloxane (OMCTS) coatings contained reasonable amounts of hydrocarbons. Moreover, OMCTS showed a pronounced tendency towards homogeneous nucleation, thus leading to the additional formation of silica NPs due to homogeneous nucleation.