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Self-Assembled Laye...
Self-Assembled Layering of Magnetic Nanoparticles in a Ferrofluid on Silicon Surfaces
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- Theis-Bröhl, Katharina (författare)
- Univ Appl Sci, Karlstadt 8, D-27568 Bremerhaven, Germany.
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- Vreeland, Erika C. (författare)
- Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.;Imag Biosyst LLC, Albuquerque, NM 87106 USA.
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- Gomez, Andrew (författare)
- Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
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- Huber, Dale L. (författare)
- Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
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- Saini, Apurve (författare)
- Uppsala universitet,Materialfysik
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- Wolff, Max (författare)
- Uppsala universitet,Materialfysik
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- Maranville, Brian B. (författare)
- NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA.
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- Brok, Erik (författare)
- NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA.;Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.;Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-21000 Copenhagen O, Denmark.
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- Krycka, Kathryn L. (författare)
- NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA.
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- Dura, Joseph A. (författare)
- NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA.
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- Borchers, Julie A. (författare)
- NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA.
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Univ Appl Sci, Karlstadt 8, D-27568 Bremerhaven, Germany Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.;Imag Biosyst LLC, Albuquerque, NM 87106 USA. (creator_code:org_t)
- 2018-01-23
- 2018
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 10:5, s. 5050-5060
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This article describes the three-dimensional self assembly of monodisperse colloidal magnetite nanoparticles (NPs) from a dilute water-based ferrofluid onto a silicon surface and the dependence of the resultant magnetic structure on the applied field. The NPs assemble into close-packed layers on the surface followed by more loosely packed ones. The magnetic field-dependent magnetization of the individual NP layers depends on both the rotational freedom of the layer and the magnetization of the adjacent layers. For layers in which the NPs are more free to rotate, the easy axis of the NP can readily orient along the field direction. In more dense packing, free rotation of the NPs is hampered, and the NP ensembles likely build up quasi-domain states to minimize energy, which leads to lower magnetization in those layers. Detailed analysis of polarized neutron reflectometry data together with model calculations of the arrangement of the NPs within the layers and input from small-angle scattering measurements provide full characterization of the core/shell NP dimensions, degree of chaining, arrangement of the NPs within the different layers, and magnetization depth profile.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- magnetite nanoparticles
- core/shell nanoparticles
- ferrofluid
- polarized neutron reflectometiy
- self-assembly
- 3D self-ordering
- quasidomains
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Theis-Bröhl, Kat ...
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Vreeland, Erika ...
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Gomez, Andrew
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Huber, Dale L.
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Saini, Apurve
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Wolff, Max
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visa fler...
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Maranville, Bria ...
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Brok, Erik
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Krycka, Kathryn ...
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Dura, Joseph A.
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Borchers, Julie ...
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visa färre...
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