Journal Article

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2021-09-24
11:28
OpenAccess [FZJ-2021-03488] Journal Article
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Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3 : Toward intrinsic gap-tunability
Science advances 7(37), eabi7532 () [10.1126/sciadv.abi7532]
The bosonic analogs of topological insulators have been proposed in numerous theoretical works, but their experimental realization is still very rare, especially for spin systems. Recently, two-dimensional (2D) honeycomb van der Waals ferromagnets have emerged as a new platform for topological spin excitations. [...]
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2021-09-24
11:28
[FZJ-2021-01550] Journal Article
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Polymorphism of human telomeric quadruplexes with drugs: a multi-technique biophysical study
The human telomeric G-quadruplex structural motif of DNA has come to be known as a new and stimulating target for anticancer drug discovery. Small molecules that interact with G-quadruplex structures in a selective way have gained impressive interest in recent years as they may serve as potential therapeutic agents. [...]
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2021-09-24
11:28
[FZJ-2021-01077] Journal Article
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Terahertz collective dynamics of DNA as affected by hydration and counterions
Local and propagating vibrations occurring in DNA in the terahertz domain are essential for processes at the basis of cellular metabolism. Here we report the results of a study on the B-DNA terahertz dynamics where we combined high-resolution inelastic x-ray experiments and incoherent inelastic neutron scattering. [...]
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2021-09-24
11:28
OpenAccess [FZJ-2021-00888] Journal Article
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Destruction of long-range magnetic order in an external magnetic field and the associated spin dynamics in Cu 2 GaBO 5 and Cu 2 AlBO 5 ludwigites
The quantum spin systems Cu2MBO5 (M = Al, Ga) with the ludwigite crystal structure consist of astructurally ordered Cu2+ sublattice in the form of three-leg ladders, interpenetrated by a structurally disorderedsublattice with a statistically random site occupation by magnetic Cu2+ and nonmagnetic Ga3+ or Al3+ ions. Amicroscopic analysis based on density-functional-theory calculations for Cu2GaBO5 reveals a frustrated quasitwo-dimensional spin model featuring five inequivalent antiferromagnetic exchanges. [...]
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2021-09-24
11:28
[FZJ-2021-00535] Journal Article
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On the Nature of Defects in Mn1 –xFexGe Compounds Synthesized under High Pressure
The mesostructure of Mn1 – xFex Ge transition-metal monogermanides is studied by small-angle neutron scattering (SANS) and ultra-SANS in a wide concentration range of x = 0.0–1.0.It is shown that the main contribution to the scattering intensity for all concentrations x is made by scattering at crystallites with sharp boundaries and sizes of 1–10 μm, which is described by the squared Lorentzian function. An additional contribution to the scattering intensity as a result of scattering at an ensemble of defects is found as well, which is characteristic of manganese-rich samples. [...]
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2021-09-24
11:28
Embargoed OpenAccess [FZJ-2020-05416] Journal Article
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Interface Deformable, Thermally Sensitive Hydrogel–Elastomer Hybrid Fiber for Versatile Underwater Sensing
Underwater sensing plays a vital role in perceiving various hydrodynamic stimuli for underwater operations, while fishes evolve an adaptable, durable, and multifunctional lateral line sensory system to feel mechanical deformations from nearly all sources as well as water temperature changes. Such perfect integration of multiple functions into one biological system poses a great challenge for artificial soft sensors. [...]

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2021-09-18
11:28
OpenAccess [FZJ-2021-03346] Journal Article
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Distribution and orientation of nerve fibers and myelin assembly in a brain section retrieved by small-angle neutron scattering
The structural connectivity of the brain has been addressed by various imaging techniques such as diffusion weighted magnetic resonance imaging (DWMRI) or specific microscopic approaches based on histological staining or label-free using polarized light (e.g., three-dimensional Polarized Light Imaging (3D-PLI), Optical Coherence Tomography (OCT)). These methods are sensitive to different properties of the fiber enwrapping myelin sheaths i.e. [...]
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2021-09-18
11:28

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2021-09-18
11:28
OpenAccess [FZJ-2021-03224] Journal Article
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Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba 2 CoGe 2 O 7 under external magnetic fields
We report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energyinelastic neutron scattering. In-plane transverse (T1) spin-wave modes are highly dispersive along (h00) andrather flat but strong in intensity along (30l). [...]
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2021-09-14
11:28
OpenAccess [FZJ-2021-00903] Journal Article
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Polyethylene Oxide Hydrogels Crosslinked by Peroxide for the Controlled Release of Proteins
Macromol 1(1), 37-48 () [10.3390/macromol1010004]
Crosslinking of polyethylene oxide (PEO) using a peroxide in the melt is employed to synthesize soft hydrogels with the ability of controlled release of proteins. The viscoelastic properties of the swollen networks confirm the elastic nature of the synthesized material and they are in agreement with swelling characteristics [...]
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