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Showing 1–20 of 20 results
Advanced filters: Author: Dmitry S. Novikov Clear advanced filters

  • Optoelectronic and photonic devices require materials with multiple, often conflicting functionalities, leading to integration challenges. Here, the authors demonstrate that layered PdSe2 is suitable for infrared photodetection, light guiding and photothermal applications due to its peculiar semimetallic band structure.

    • Aleksandr Slavich
    • Georgy Ermolaev
    • Valentyn Volkov
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-9

  • The study shows that time-dependent diffusion MRI detects subtle axonal changes in brain injury by identifying structural signatures of diffusive dynamics of water along axons, bridging cellular-level alterations with millimeter-scale imaging.

    • Ali Abdollahzadeh
    • Ricardo Coronado-Leija
    • Dmitry S. Novikov
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-16

  • The direct C–H activation of inert C(sp3)–H bonds in a hydrocarbon chain is an attractive target in organic synthesis but C-H activation driven by vinyl carbocations remains underdeveloped. Here, the authors design a double C(sp3)–H functionalization of unactivated alkyl CH2 groups to produce substituted quaternary carbon stereocenter via insertion of vinyl carbocations.

    • Roman A. Novikov
    • Denis D. Borisov
    • Yury V. Tomilov
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-11

  • Principal optical axes define light-matter interactions in crystals and they are usually assumed to be stationary. Here, the authors report the observation of wavelength-dependent principal optical axes in ternary van der Waals crystals (ReS2 and ReSe2), leading to wavelength-switchable propagation directions of their waveguide modes.

    • Georgy A. Ermolaev
    • Kirill V. Voronin
    • Kostya S. Novoselov
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • Small-angle X-ray scattering (SAXS) combines the high tissue penetration of X-rays with specificity to periodic nanostructures. The authors use SAXS tensor tomography (SAXS-TT) on intact mouse and human brain tissue samples, to quantify myelin levels and determine myelin integrity, myelinated axon orientation, and fibre tracts non-destructively.

    • Marios Georgiadis
    • Aileen Schroeter
    • Markus Rudin
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-13

  • In addition to hyperfine splitting effects, isotope shifts of atomic electronic energy levels allow the investigation nuclear properties. Here, the authors study the isotope dependence of the Zeeman effect in litihium-like calcium isotopes in a Penning-trap setup and find good agreement with QED calculations.

    • Florian Köhler
    • Klaus Blaum
    • Günter Werth
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-8

  • Single nanoparticles are known to emit light intermittently, or 'blink', but the mechanisms describing this phenomenon are not fully understood. This study demonstrates that, for small clusters of blinking nanoparticles, the number of particles within a cluster dramatically influences blinking time.

    • Siying Wang
    • Claudia Querner
    • Marija Drndic
    Research
    Nature Communications
    Volume: 2, P: 1-8

  • The authors combine films of two-dimensional semiconductors, which exhibit excitonic spectral features, with SiO2/Si Fabry-Perot resonators in order to realize topological phase singularities in reflection. Around these singularities, the reflection spectra demonstrate rapid phase changes while the structure behaves as a perfect absorber.

    • Georgy Ermolaev
    • Kirill Voronin
    • Valentyn Volkov
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • Permeable membranes play a vital role in many biological processes. Simulations of Brownian motion now show that the spatially correlated disorder of these membranes unexpectedly modifies diffusion rates.

    • Dmitry S. Novikov
    • Els Fieremans
    • Joseph A. Helpern
    Research
    Nature Physics
    Volume: 7, P: 508-514

  • Nuclear magnetic resonance is a technique ubiquitous in a diverse range of scientific and clinical fields. However, it can be sensitive to small deviations in the driving magnetic fields, which can easily disrupt measurement accuracy. Here, the authors develop a hybrid-state free precession approach which demonstrates greater robustness against deviations in the magnetic fields and exhibits an improved signal-to-noise ratio.

    • Jakob Assländer
    • Dmitry S. Novikov
    • Martijn A. Cloos
    ResearchOpen Access
    Communications Physics
    Volume: 2, P: 1-12

  • Hong-Hsi Lee et al. identify a characteristic power-law scaling in the time-dependent diffusion MRI signal that can detect micrometer-scale variations in axon caliber or pathological beading. They validate this signature trait using Monte Carlo simulations in axonal microstructure based on electron microscopy of mouse corpus callosum and illustrate the sensitivity of this method by detecting axon beading in a neurodegenerative disorder.

    • Hong-Hsi Lee
    • Antonios Papaioannou
    • Els Fieremans
    ResearchOpen Access
    Communications Biology
    Volume: 3, P: 1-13