| 1. |
- Disch, Sabrina, et al.
(author)
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Structural diversity in iron oxide nanoparticle assemblies as directed by particle morphology and orientation
- 2013
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In: Nanoscale. - : Royal Society of Chemistry (RSC). - 2040-3364 .- 2040-3372. ; 5:9, s. 3969-3975
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Journal article (peer-reviewed)abstract
- The mesostructure of ordered arrays of anisotropic nanoparticles is controlled by a combination of packing constraints and interparticle interactions, two factors that are strongly dependent on the particle morphology. We have investigated how the degree of truncation of iron oxide nanocubes controls the mesostructure and particle orientation in drop cast mesocrystal arrays. The combination of grazing incidence small-angle X-ray scattering and scanning electron microscopy shows that mesocrystals of highly truncated cubic nanoparticles assemble in an fcc-type mesostructure, similar to arrays formed by iron oxide nanospheres, but with a significantly reduced packing density and displaying two different growth orientations. Strong satellite reflections in the GISAXS pattern indicate a commensurate mesoscopic superstructure that is related to stacking faults in mesocrystals of the anisotropic nanocubes. Our results show how subtle variation in shape anisotropy can induce oriented arrangements of nanoparticles of different structures and also create mesoscopic superstructures of larger periodicity.
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| 2. |
- Edgren, Lars, et al.
(author)
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De svenska hantverksskråna under 1700-talet
- 1997
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In: Fundera tar längsta tiden, sa skräddarn, då han sydde byxor : Frågeställningar och problem kring hantverksforskning från medeltiden till skråväsendets upplösning - Frågeställningar och problem kring hantverksforskning från medeltiden till skråväsendets upplösning. - 0357-2129. - 9512909448 ; 42, s. 109-144
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Book chapter (other academic/artistic)
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| 3. |
- Knaapila, Matti, et al.
(author)
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Structural Study of the Photo-Mediated Growth of Silver Nanoprisms
- 2020
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In: Molecules (Basel, Switzerland). - : MDPI AG. - 1420-3049. ; 25:22
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Journal article (peer-reviewed)abstract
- We present a small-angle X-ray scattering (SAXS) study of the anisotropic photoinduced growth of silver (Ag) nanoprisms in aqueous dispersions. The growth of nearly spherical (<10 nm) Ag particles into large (>40 nm) and thin (<10 nm) triangular nanoprisms induced by 550 nm laser is followed in terms of particle size using indirect and direct methods for irradiation times up to 150 min. During the process, the surface-to-volume ratio of the particles decreased. The SAXS data of the initial solution fit well to the model of polydisperse spheres with pronounced average diameters around 7.4 nm and 10 nm. The data after 45 min irradiation fit well to the model containing approximately the same amount of the initial particles and the end product, the nanoprisms.
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| 4. |
- Pranzas, P. Klaus, et al.
(author)
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Characterization of Hydrogen Storage Materials and Systems with Photons and Neutrons
- 2011
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In: Advanced Engineering Materials. - : Wiley. - 1527-2648 .- 1438-1656. ; 13:8, s. 730-736
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Journal article (peer-reviewed)abstract
- Complex hydrides are very promising candidates for future light-weight solid state hydrogen storage materials. The present work illustrates detailed characterization of such novel hydride materials on different size scales by the use of synchrotron radiation and neutrons. The comprehensive analysis of such data leads to a deep understanding of the ongoing processes and mechanisms. The reaction pathways during hydrogen desorption and absorption are identified by in situ X-ray diffraction (XRD). Function and size of additive phases are estimated using X-ray absorption spectroscopy (XAS) and anomalous small-angle X-ray scattering (ASAXS). The structure of the metal hydride matrix is characterized using (ultra) small-angle neutron scattering (SANS/USANS). The hydrogen distribution in tanks filled with metal hydride material is studied with neutron computerized tomography (NCT). The results obtained by the different analysis methods are summarized in a final structural model. The complementary information obtained by these different methods is essential for the understanding of the various sorption processes in light metal hydrides and hydrogen storage tanks.
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