000908217 001__ 908217
000908217 005__ 20250129094250.0
000908217 020__ $$a978-3-95806-666-3
000908217 0247_ $$2Handle$$a2128/32005
000908217 037__ $$aFZJ-2022-02468
000908217 041__ $$aEnglish
000908217 1001_ $$0P:(DE-Juel1)176627$$aNandakumaran, Nileena$$b0$$eCorresponding author
000908217 245__ $$aSelf-assembly of Au-Fe3O4 dumbbell nanoparticles$$f - 2022-06-10
000908217 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2022
000908217 300__ $$axiv, 234
000908217 3367_ $$2DataCite$$aOutput Types/Dissertation
000908217 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook$$mbook
000908217 3367_ $$2ORCID$$aDISSERTATION
000908217 3367_ $$2BibTeX$$aPHDTHESIS
000908217 3367_ $$02$$2EndNote$$aThesis
000908217 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1669103777_13815
000908217 3367_ $$2DRIVER$$adoctoralThesis
000908217 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien / Key Technologies$$v264
000908217 502__ $$aDissertation, RWTH Aachen University, 2022$$bDissertation$$cRWTH Aachen University$$d2022
000908217 520__ $$aA dumbbell nanoparticle (DBNP) system consists of an optically active Au seed particle on which a magnetic iron oxide nanoparticle (IONP) is heterogeneously grown. Control and manipulation of these multi-functional hetero-structures have applications as a dual-probe for biomedical imaging, in catalysis, sensing, optics, photonics and electronics. This thesis investigates the magnetic field-induced self-assembly in  diverse DBNPs, with different sizes of Au and IONPs coated with oleic acid and oleylamine and dispersed in toluene. The effects of DBNPs’ complex morphology arecompared and contrasted to self-assembly studies on the IONPs’, which are singlephase spherical counterparts. Direct comparison simplifies the understanding of broad parameter space, including the size of the Au seed and the grown IONP, their size distribution, the thickness of surfactant coating around the nanoparticle, concentration in a dispersion, composition, magnetic structure, and strength of the magnetic field. A multiscale experimental approach is adopted to analyze the structure and magnetic properties to link it to the self-assembly phenomenon. Microscopy combinedwith local atomic structure obtained from synchrotron x-ray pair distribution function (xPDF) is used to reveal local crystal structure, crystallinity, size and distortion induced at the surface. Macroscopic magnetic measurements along with polarized neutron scattering reveal the magnetic behavior. Small-angle x-ray and neutron scattering (SAXS/SANS) measurements are exploited to observe and analyze selfassembling patterns. Real-space analysis of such patterns is achieved through reverse Monte Carlo (RMC) simulations. Spherical IONPs reversibly form 1D chains thatalign, straighten with magnetic field. On the other hand, 1D and 2D chains are observed with DBNPs in an applied magnetic field. The assemblies are classified into three categories based on the anisotropy in the 2D scattering pattern. Moreover, due to the unique morphology and orientation effects, the chains formed by DBNPs within these categories have head-to-tail or side-by-side arrangement. Shape-induced mechanisms governed by a dimensionless parameter are suggested to play a vital role in determining assembly formation.
000908217 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x0
000908217 536__ $$0G:(DE-HGF)POF4-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)$$cPOF4-6G4$$fPOF IV$$x1
000908217 693__ $$0EXP:(DE-MLZ)KWS1-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)KWS1-20140101$$6EXP:(DE-MLZ)NL3b-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eKWS-1: Small angle scattering diffractometer$$fNL3b$$x0
000908217 693__ $$0EXP:(DE-MLZ)KWS2-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)KWS2-20140101$$6EXP:(DE-MLZ)NL3ao-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eKWS-2: Small angle scattering diffractometer$$fNL3ao$$x1
000908217 693__ $$0EXP:(DE-MLZ)KWS3-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)KWS3-20140101$$6EXP:(DE-MLZ)NL3auS-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eKWS-3: Very small angle scattering diffractometer with focusing mirror$$fNL3auS$$x2
000908217 693__ $$0EXP:(DE-MLZ)MARIA-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)MARIA-20140101$$6EXP:(DE-MLZ)NL5N-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eMARIA: Magnetic reflectometer with high incident angle$$fNL5N$$x3
000908217 8564_ $$uhttps://juser.fz-juelich.de/record/908217/files/Schluesseltech_264.pdf$$yOpenAccess
000908217 8564_ $$uhttps://juser.fz-juelich.de/record/908217/files/Thesis-full-NileenaNandakumaran2022-embedd-finalized.pdf$$yOpenAccess
000908217 909CO $$ooai:juser.fz-juelich.de:908217$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire
000908217 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176627$$aForschungszentrum Jülich$$b0$$kFZJ
000908217 9131_ $$0G:(DE-HGF)POF4-632$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lFrom Matter to Materials and Life$$vMaterials – Quantum, Complex and Functional Materials$$x0
000908217 9131_ $$0G:(DE-HGF)POF4-6G4$$1G:(DE-HGF)POF4-6G0$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vJülich Centre for Neutron Research (JCNS) (FZJ)$$x1
000908217 9141_ $$y2022
000908217 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000908217 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0
000908217 920__ $$lyes
000908217 9201_ $$0I:(DE-Juel1)JCNS-2-20110106$$kJCNS-2$$lStreumethoden$$x0
000908217 9201_ $$0I:(DE-Juel1)PGI-4-20110106$$kPGI-4$$lStreumethoden$$x1
000908217 9201_ $$0I:(DE-82)080009_20140620$$kJARA-FIT$$lJARA-FIT$$x2
000908217 9801_ $$aFullTexts
000908217 980__ $$aphd
000908217 980__ $$aVDB
000908217 980__ $$aUNRESTRICTED
000908217 980__ $$abook
000908217 980__ $$aI:(DE-Juel1)JCNS-2-20110106
000908217 980__ $$aI:(DE-Juel1)PGI-4-20110106
000908217 980__ $$aI:(DE-82)080009_20140620
000908217 981__ $$aI:(DE-Juel1)JCNS-2-20110106