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@ARTICLE{Schindler:838847,
author = {Schindler, Torben and Schmutzler, Tilo and Schmiele, Martin
and Lin, Wei and Segets, Doris and Peukert, Wolfgang and
Appavou, Marie-Sousai and Kriele, Armin and Gilles, Ralph
and Unruh, Tobias},
title = {{C}hanges within the stabilizing layer of {Z}n{O}
nanoparticles upon washing},
journal = {Journal of colloid and interface science},
volume = {504},
issn = {0021-9797},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2017-07357},
pages = {356 - 362},
year = {2017},
abstract = {ZnO nanoparticles (NPs) are highly relevant for various
industrial applications, however, after synthesis of the NPs
residual chemicals need to be removed from the colloidal raw
product by washing, as they may influence the performance of
the final device.In the present study we focus on the effect
of washing by antisolvent flocculation with subsequent
redispersion of the NPs on the stabilizing acetate shell.
Purification of the ZnO nanoparticles is reported to be
optimal with respect to zeta potential that has a maximum
after one washing cycle. In this work, we will shed light on
this observation using small angle X-ray and neutron
scattering (SAXS, SANS) by demonstrating that after the
first washing cycle the content of acetate in the ligand
shell around the ZnO NPs increases.In detail, it was
observed that the diffuse acetate shell shrinks to the size
of a monolayer upon washing but the acetate content of this
monolayer is higher than within the diffuse shell of the
particles of the native dispersion. A second washing cycle
reduces the acetate concentration within the stabilizing
shell and the stability of the dispersion drops accordingly.
After another (third) washing cycle strong agglomeration was
observed for all investigated samples.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28582753},
UT = {WOS:000405646200039},
doi = {10.1016/j.jcis.2017.05.059},
url = {https://juser.fz-juelich.de/record/838847},
}