In-between Bragg reflections: thermal diffuse scattering and vibrational spectroscopy with x-rays

Bosak, Alexeï; Chernyshov, Dmitry; Wehinger, Björn; Winkler, Björn; Tacon, M. Le; Krisch, M.

doi:10.1088/0022-3727/48/50/504003

Cited by 18 publications

(15 citation statements)

References 44 publications

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“…Rough surface and texture provides cotton-like characteristics to the soy-PE fibers and improves their tactile properties. 37 Soy agglomerates are also evident in the fiber cross section of S23/M7/PE70, as displayed in Figure 5(c). However, the size of these agglomerates is much smaller than that observed for the uncompatibilzed blend.…”

Section: Viscosity and Fiber Spinningmentioning

confidence: 87%

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Güzdemir¹,

Lukubira²,

Ogale³

2018

J of Applied Polymer Sci

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By adding soy flour (soy) to linear low‐density polyethylene (LLDPE), soy‐PE fibers with enhanced hydrophilic characteristics were developed. Blends containing only soy and LLDPE had limited draw‐down, and the resulting thick fibers showed poor mechanical properties. When monoglyceride was added as a compatibilizer, thin fibers with good properties could be successfully spun due to improved dispersion of soy agglomerates in the LLDPE melt. Fibers spun from a blend containing 23/7/70 wt % of soy‐monoglyceride‐LLDPE displayed a tensile modulus and strength of 615 ± 38 and 57 ± 8 MPa, respectively. At 30% less synthetic content, these fibers still displayed mechanical properties generally comparable to those of base polyethylene fibers. Contact angle measurements showed that the soy‐based fibers had a hydrophilic surface (contact angle of 33° ± 4°). Moisture absorption studies confirmed that soy‐PE fibers gained about 20 wt % moisture in 1 h, whereas neat LLDPE fibers did not absorb any significant amount (LLDPE is hydrophobic). This hydrophilic behavior of soy‐PE fibers mimics that of natural fibers. Presence small soy agglomerates on the fiber surface also provides a textured surface and a desired tactile feel to the soy‐PE fibers, which coupled with hydrophilic behavior indicates their potential use in disposable nonwovens. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46609.

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Section: Viscosity and Fiber Spinningmentioning

confidence: 87%

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Güzdemir¹,

Lukubira²,

Ogale³

2018

J of Applied Polymer Sci

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“…In order to identify favorable reciprocal space positions for the study of the charge ordered state, we started our investigation with a DS study, similar to what was recently done in the case of transition metal dichalco- genides and cuprate superconductors [21][22][23]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Soft-phonon-driven orbital order inCaMn7O12

Souliou

et al. 2016

Phys. Rev. B

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We use variable-temperature x-ray thermal diffuse scattering and inelastic scattering to investigate the lattice dynamics in single crystals of multiferroic CaMn7O12 which undergo a series of orbital and magnetic transitions at low temperatures. Upon approaching the charge and orbital ordering temperature To=250 K from above, we observe intense diffuse scattering features and a pronounced optical phonon softening centered around the superstructure reflections of the incommensurately modulated structure. The phonon anomaly appears well above To and continuously increases upon cooling, following a canonical power-law temperature dependence that confirms the transition at To to be of second order and related to a soft-phonon lattice instability. Microscopic mechanisms for the incommensurate charge and orbital ordering based on competing interactions and on momentumdependent electron-phonon coupling could both account for the observed extended momentum width of the phonon softening. Our results highlight the importance of the lattice interactions in the physics of this magnetically induced ferroelectric system.

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“…TDS studies are particularly efficient when coupled with spectroscopic investigations and state-of-the-art ab initio calculations; see Bosak et al (2015) for a review. Specifically, a fast mapping of reciprocal space prior to an inelastic X-ray scattering (IXS) experiment allows the identification of regions of interest, which can then be explored in more detail by energy-resolved spectroscopic measurements.…”

Section: Introductionmentioning

confidence: 99%

A new diffractometer for diffuse scattering studies on the ID28 beamline at the ESRF

et al. 2019

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A new diffractometer is now available to the general user community at the ESRF. The new diffractometer is a side station of the high‐resolution inelastic X‐ray scattering spectrometer on beamline ID28 and is located in the same experimental hutch. Both instruments can be operated simultaneously. The new diffractometer combines a fast and low‐noise hybrid pixel detector with a variable diffraction geometry. The beam spot on the sample is 50 µm × 50 µm, where focusing is achieved by a combination of Be lenses and a KB mirror. Wavelengths from 0.5 to 0.8 Å can be used for the diffraction experiments. The setup is compatible with a variety of sample environments, allowing studies under non‐ambient conditions. The diffractometer is optimized to allow a rapid survey of reciprocal space and diffuse scattering for the identification of regions of interest for subsequent inelastic scattering studies, but can also be employed as a fully independent station for structural studies from both powder and single‐crystal diffraction experiments. Several software packages for the transformation and visualization of diffraction data are available. An analysis of data collected with the new diffractometer shows that the ID28 side station is a state‐of‐the‐art instrument for structural investigations using diffraction and diffuse scattering experiments.

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In-between Bragg reflections: thermal diffuse scattering and vibrational spectroscopy with x-rays

Cited by 18 publications

References 44 publications

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Soft-phonon-driven orbital order inCaMn7O12

A new diffractometer for diffuse scattering studies on the ID28 beamline at the ESRF

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