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@ARTICLE{Schlenk:859962,
author = {Schlenk, Mathias and Hofmann, Eddie and Seibt, Susanne and
Rosenfeldt, Sabine and Schrack, Lukas and Drechsler, Markus
and Rothkirch, Andre and Ohm, Wiebke and Breu, Josef and
Gekle, Stephan and Förster, Stephan},
title = {{P}arallel and {P}erpendicular {A}lignment of {A}nisotropic
{P}articles in {F}ree {L}iquid {M}icrojets and {E}merging
{M}icrodroplets},
journal = {Langmuir},
volume = {34},
number = {16},
issn = {1520-5827},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2019-00768},
pages = {4843 - 4851},
year = {2018},
abstract = {Liquid microjets play a key role in fiber spinning, inkjet
printing, and coating processes. In all of these
applications, the liquid jets carry dispersed particles
whose spatial and orientational distributions within the jet
critically influence the properties of the fabricated
structures. Despite its importance, there is currently no
knowledge about the orientational distribution of particles
within microjets and droplets. Here, we demonstrate a
microfluidic device that allows to determine the local
particle distribution and orientation by X-ray scattering.
Using this methodology, we discovered unexpected changes in
the particle orientation upon exiting the nozzle to form a
free jet, and upon jet break-up into droplets, causing an
unusual biaxial particle orientation. We show how flow and
aspect ratio determine the flow orientation of anisotropic
particles. Furthermore, we demonstrate that the observed
phenomena are a general characteristic of anisotropic
particles. Our findings greatly enhance our understanding of
particle orientation in free jets and droplets and provide a
rationale for controlling particle alignment in liquid
jet-based fabrication methodologies.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29528234},
UT = {WOS:000431088500015},
doi = {10.1021/acs.langmuir.8b00062},
url = {https://juser.fz-juelich.de/record/859962},
}