Sökning: id:"swepub:oai:DiVA.org:uu-409490" >
Magnetic particle s...
Magnetic particle self-assembly at functionalized interfaces
-
- Saini, Apurve (författare)
- Uppsala universitet,Materialfysik
-
- Theis-Bröhl, Katharina (författare)
- University of Applied Sciences Bremerhaven, An der Karlstadt 8, 27568 Bremerhaven, Germany
-
- Koutsioumpas, Alexandros (författare)
- Forschungszentrum Jülich GmbH
-
visa fler...
-
- Krycka, Kathryn L. (författare)
- NIST Center for Neutron Research, 100 Bureau Drive, Gaithersburg, 20899-6102, USA
-
- Borchers, Julie A. (författare)
- NIST Center for Neutron Research, 100 Bureau Drive, Gaithersburg, 20899-6102, USA
-
- Wolff, Max (författare)
- Uppsala universitet,Materialfysik
-
visa färre...
-
(creator_code:org_t)
- 2021-04-02
- 2021
- Engelska.
-
Ingår i: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 37:14, s. 4064-4071
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://uu.diva-port... (primary) (Raw object)
-
https://pubs.acs.org...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We study the assembly of magnetite nanoparticles in water-based ferrofluids in wetting layers close to silicon substrates with different functionalization without and with an out-of-plane magnetic field. For particles of nominal sizes 5, 15, and 25 nm, we extract density profiles from neutron reflectivity measurements. We show that self-assembly is only promoted by a magnetic field if a seed layer is formed at the silicon substrate. Such a layer can be formed by chemisorption of activated N-hydroxysuccinimide ester-coated nanoparticles at a (3-aminopropyl)triethoxysilane functionalized surface. Less dense packing is reported for physisorption of the same particles at a piranha-treated (strongly hydrophilic) silicon wafer, and no wetting layer is found for a self-assembled monolayer of octadecyltrichlorosilane (strongly hydrophobic) at the interface. We show that once the seed layer is formed and under an out-of-plane magnetic field further wetting layers assemble. These layers become denser with time, larger magnetic fields, higher particle concentrations, and larger moment of the nanoparticles.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- magnetic assembly
- solid-liquid interface
- ferrofluid
- neutron reflectometry
- Fysik
- Physics
- Materialvetenskap
- Materials Science
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
-
Langmuir
(Sök värdpublikationen i LIBRIS)
Till lärosätets databas