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Substantial Differe...
Substantial Difference in Ordering of 10, 15, and 20 nm Iron Oxide Nanoparticles on a Water Surface : In Situ Characterization by the Grazing Incidence X-ray Scattering
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- Vorobiev, Alexey (författare)
- Uppsala universitet,Materialfysik,European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.
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- Khassanov, A. (författare)
- European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.;Univ Erlangen Nurnberg, Organ Mat & Devices, D-91058 Erlangen, Germany.
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- Ukleev, V. (författare)
- Uppsala universitet,Materialfysik,Petersburg Nucl Phys Inst, St Petersburg 188300, Russia.
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- Snigireva, I. (författare)
- European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.
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- Konovalov, O. (författare)
- European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.
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(creator_code:org_t)
- 2015-10-07
- 2015
- Engelska.
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Ingår i: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 31:42, s. 11639-11648
- 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
- In the present study, for the first time, a unique combination of in situ grazing incidence small-angle X-ray scattering and X-ray reflectivity, accompanied by the pressure area isotherm analysis, Brewster angle microscopy, and ex situ scanning electron microscopy, was applied for investigation of two-dimensional superlattices of magnetic nanoparticles as they form on a water surface in a Langmuir trough. Iron oxide particles of different sizes stabilized with a single layer of oleic acid were used. It is demonstrated that monodisperse 10 nm particles on a water surface reproducibly form identical highly ordered monolayers in a wide range of experimental conditions, while monodisperse 20 nm particles always form compact three-dimensional clusters and never the monolayers. Monodisperse particles of an intermediate size, 15 um in diameter, build a metastable monolayer, which shows a tendency for spontaneous transformation to bi-, tri-, and multilayer islands. The importance to use both grazing incidence small-angle X-ray scattering and X-ray reflectivity together with the complementary techniques, to avoid misinterpretation of separate experimental data sets, is underlined.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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