Articles tagged with Anisotropy
Three carbon-based materials have been predicted to exhibit omnidirectional auxetic behavior due to their negative Poisson's ratio. The findings suggest that these materials could be useful in photovoltaic devices or as light-powered catalysts.
Researchers discovered giant optical anisotropy in molybdenum disulfide crystals, enabling compact photonic devices and waveguides. The material's birefringence value is several times greater than previous record-breakers.
A team led by Prof. Ping-Heng Tan proposed the birefringence-linear-dichroism (BLD) model to quantify ARPR intensity in bulk black phosphorus and opaque anisotropic crystals. The BLD model considers complex refractive indexes along three principle axes, reproducing experimental data without fitting parameters.
Researchers developed a boron-doped anisotropic Sm(Fe0.8Co0.2)12 thin film with exceptional magnetic properties. The compound showed a large coercivity of 1.2 T and a remanent magnetization of 1.5 T, outperforming previously studied Sm(Fe0.8Co0.2)12 compounds.
Scientists propose a concept of temporal metamaterials that change permittivity tensor in time, demonstrating forward and backward waves with preserved wave vector and frequency changes. This enables real-time beam steering of electromagnetic energy, opening new possibilities for integrated photonic systems.
Researchers found emission from laterally coupled quantum dots is strongly polarized along the coupling direction and can be shaped by changing excitation polarization. This control enables optically-controlled anisotropic wavefunctions, opening new avenues for data storage and thermoelectric energy harvesting.
Scientists successfully created large-area periodic micro/nanoripple structures on a silicon substrate using femtosecond laser plasmonic lithography, retaining the properties of the graphene material. The process enables enhanced light absorption and photoelectric performance.
Scientists from UNSW Sydney report new measurements of light emitted from a quasar 13 billion light years away, reaffirming past studies on tiny variations in the fine structure constant. The findings suggest that one of nature's laws may not be constant, challenging the Grand Unifying Theory.
Researchers from OIST discovered that as exciton density increased, exciton-exciton annihilation shifted from 1D to 2D due to phosphorene's anisotropic properties. Temperature also played a role, with exciton annihilation reverting to 1D at lower temperatures.
Researchers have developed a new type of birefringent modification using ultrafast laser direct writing in silica glass, enabling ultra-low loss spatially variant birefringent optical elements. These elements can be used for high power lasers, visible and UV light sources, and even multiplexed data storage.
A new device uses magnetic fingerprinting to identify hidden metal objects, offering a smaller and cheaper alternative to traditional security systems. It can detect a wide range of metallic objects, from cellphones to hammers, with improved accuracy and low power consumption.
Researchers have successfully demonstrated strong and directionally dependent interactions between remote fluids of excitons, a type of quasi-particle in semiconductors. This breakthrough opens up new avenues for creating exotic states of matter and exploring the properties of dipolar quantum gases and liquids.
Researchers applied principal component analysis to receiver function data, improving signal-to-noise ratio and separating structural variations. The new method effectively constrains the crustal structure beneath targeted stations.
A geosciences professor at the University of Akron has received a $512,045 NSF CAREER grant to investigate how lower crust strength anisotropy affects aftershock earthquake events. The study aims to provide new insights into rock properties and seismic release during earthquakes.
Researchers investigate turbulence scaling in fluids at critical points, finding anisotropy and compressibility impact scaling behavior. Four types of scaling regimes identified, with anisotropy key to determining emerging behavior.
Researchers from the University of Houston have reported a new understanding of deep earthquakes, finding they are hosted in anisotropic rocks. This discovery explains why deep earthquakes radiate seismic energy differently than shallow ones, offering insights into the causes of these events.
Researchers have developed new magnetic Janus particles for efficient oil-water separation. The particles separate micro-scaled oil droplets from water rapidly and efficiently, achieving high separation efficiency.
Researchers at NIMS and Tohoku University observed an anisotropic magneto-Peltier effect, a phenomenon that manipulates the temperature of magnetic materials through simple redirection of charge current. This discovery has the potential to develop thermal management technologies for energy-efficient electronic devices.
The researchers fabricated super-repellent films with a water contact angle of 166° using modified anisotropic silica particles. The films demonstrated excellent mechanical robustness, maintaining their hydrophobicity even after 100 cycles of abrasion or acid/base attack.
Researchers at Tohoku University have developed ultra-small magnetic tunnel junctions (MTJs) down to a single-digit nanometer scale, achieving sufficient retention properties and fast switching speed. The new MTJ design utilizes shape anisotropy, enabling high thermal stability factors and current-induced magnetization switching.
Researchers predict and demonstrate a giant spin anisotropy in graphene, paving the way for new spintronic logic devices. This phenomenon enables control over the lifetime of different spin orientations in graphene.
Researchers combined Hubble and Gaia data to measure the proper motion of 15 stars in the Sculptor Galaxy, revealing an unexpected preference in direction. The findings question current models of dark matter halos, suggesting that assumptions on star populations may be invalid.
Researchers at the University of Konstanz have successfully synthesized Europium(II) oxide nanoparticles, a ferromagnetic semiconductor with promising properties for spin-based electronics. The team developed a novel two-stage process to produce high-quality and anisotropic EuO-nanoparticles with tunable magnetic properties.
Researchers have found that crystalline tungsten exhibits anisotropic resistivity, with smaller resistivity in certain orientations. The study's findings demonstrate the potential for tungsten to reduce nanowire resistance and may pave the way for new materials to replace copper interconnects.
The study reveals that the anisotropic Qf value is caused by anisotropic electron conductivity and anisotropic bonding strength in the superstructure. The researchers achieved a five-fold increase in Qf parallel to the c-axis compared to perpendicular to it.
Researchers found significant microstructural changes in brain structure from early to mid-adulthood, allowing for accurate age estimation. These changes were associated with cognitive decline and disease, but the link to old-age cognitive decline is unclear.
Researchers at Osaka University developed a non-invasive imaging technique to detect kidney damage and predict chronic kidney disease in diabetic patients. The method uses diffusion tensor MRI (DTI) to identify specific regions of the kidney with abnormal fluid dynamics, offering a promising approach to prevent kidney disease progression.
Researchers developed a novel approach to synthesizing Janus particles with controllable topological and chemical anisotropy using emulsion interfacial polymerization. The method produced uniform Janus particles with amphiphilicity, expanding their utility in applications such as oil-water separation and biological detection.
Researchers have used machine learning to analyze brain imaging data and identify patterns predictive of depression. The study found that DTI-derived fractional anisotropy maps can accurately classify depressed or vulnerable individuals versus healthy controls.
A new polarization-dipole azimuth-based super-resolution technique has been proposed, addressing a long-standing debate on the role of fluorescence polarization in super-resolution imaging. The technique uses SDOM technology to improve spatial resolution and detection accuracy, revealing interesting findings in biological samples.
Researchers found an unexpected method to control the thermal conductivity of two-dimensional (2-D) materials by introducing disorder through lithium ions. This approach allowed for a significant increase in the material's thermal anisotropy ratio, making it more efficient at dissipating heat in electronic devices.
The study establishes a phase diagram of dry olivine up to 6.4 GPa, linking temperature and melting behavior. This relationship enables the comparison of the strength of the upper mantle with different thermal states and olivine composition.
A collaborative research centre at the University of Konstanz is studying directional properties of particles and their superstructures. The SFB 1214 aims to create a new generation of materials with tailor-made properties by controlling particle arrangement.
Researchers have developed a new way to fully absorb electromagnetic radiation using an anisotropic crystal, hexagonal boron nitride. This breakthrough has significant implications for reducing radar visibility and improving applications in photovoltaics, sensing, nanochemistry, and photodynamic therapy.
Researchers discovered that tungsten ditelluride (WTe2) is electronically three-dimensional with low anisotropy. This finding challenges the material's original assumption of being two-dimensional in nature and opens up new possibilities for nanoscale transistors.
Researchers at Berkeley Lab discovered unique thermal properties in black phosphorus nanoribbons, with high directional anisotropy in thermal conductivity at temperatures greater than 100K. This finding has implications for designing energy-efficient devices, as the lattice orientation of patterns can affect thermal conductivity.
Seismic investigations reveal extreme mantle perturbation and crust-mantle interaction in Eastern China's Qinling-Dabie-Sulu orogenic belt. The region was affected by compressional deformation due to collision between North and South China blocks.
The study of energetic particles at the edge of our solar system suggests that the galactic magnetic field wraps around our heliosphere, influencing the orientation of energetic particles. The research combines data from IBEX and ultra-high-energy cosmic ray physics to provide a more complete picture of the interactions between the two.
A study by Dr. Jun Pu and colleagues found similar characteristics of brain diffusion-tensor imaging (DTI) in healthy adult rhesus monkeys and young people. Fractional anisotropy values were comparable, with low values in the caudate nucleus and thalamus, and high values in the splenium of the corpus callosum.
Research found that stroke patients with negative motor evoked potentials exhibit decreased fractional anisotropy values and cerebral peduncle area changes on the affected side, indicating poor limb motor function recovery. These changes occur within 1 month after disease onset and worsen over time, even at 6 months post-infarction.
Researchers create a new 3D imaging technique using anisotropic triangles to provide more accurate approximations of object shapes and improve simulation results. The technique can generate images up to 125 times faster than current approaches while maintaining higher accuracy, particularly for wrinkles and movement.
A new study found that frequent cognitive activity in late life is associated with higher diffusion anisotropy values in the brain, indicating better microstructural integrity. The research suggests that keeping the brain occupied can have positive outcomes and may help maintain brain health in older adults.
Researchers analyze seismic data from India to understand past and present Earth dynamics. They also discuss the importance of studying forearc crust and ophiolites to understand subduction zone formation. Additionally, experiments reveal the melting of sediments at high pressures and temperatures.
Researchers studied the relaxation dynamics of 2D nanoparticle systems, which exhibit unusual slow relaxation and aging effects due to their unique structures. The study used a novel approach to measure surface pressure in two directions, revealing complex relaxation mechanisms.
Two studies published in Lithosphere suggest the existence of a pre-3.3 billion year old continent in the East Indian Shield, implying a possible original supercontinent. Additionally, measurements of SKS splitting in South America indicate that asthenospheric flow plays a significant role in shaping the upper mantle's anisotropy.
Researchers developed a novel fluorescence anisotropy method to study large protein complexes in real time in live cells. The technique resolves the state of order or disorder of individual protein domains within these complexes, providing new insights into their dynamics and function.
Researchers at IceCube observatory discover unusual pattern in cosmic ray data, shedding new light on interstellar magnetic fields and possible sources of high-energy cosmic rays. The finding provides a significant boost to physics and astronomy studies, ruling out some proposed theories about the source of Northern Hemisphere anisotropy.
Researchers developed a noninvasive device that can measure electrical conductivity in geological core samples without destroying them. This technology has the potential to provide valuable information about rock layers and help oil companies understand and evaluate oil and gas reserves.
Researchers found that snakes' belly scales provide a preferred direction of motion, making snake movement similar to wheels or ice skates. This study's findings contradict previous studies suggesting snakes push laterally against rocks and branches.
Researchers have developed new methods to analyze marble intrinsic features, petrography, and physical properties to predict durability and changeability. The study aims to identify the most suitable marbles for construction purposes and prevent decay in European buildings.
Researchers have created a three-dimensional model describing the seismic anisotropy and iron crystal texture within Earth's innermost core. The study revealed an inner inner core with a diameter of approximately 1,180 kilometers.
A new MIT microchip system sorts proteins in minutes, faster than traditional gel-based systems, enabling earlier diagnoses and treatments for diseases. The device uses anisotropic nanofluidic sieving structure to separate proteins of different sizes, increasing the probability of detecting biomarkers.
Researchers at Kent State University reveal that all LCD surfaces align parallel to anisotropic surface roughness. The study reveals new insights into the structure and behavior of liquid crystals on various glass substrates.
Scientists use AFM and STM to study frictional force in decagonal quasicrystals, revealing strong connection between interface structure and dissipation. The results show that friction is greater along the periodic direction, with an anisotropy of up to 8 times greater than in the aperiodic direction.
Scientists use quantum mechanical simulations to explain silicon's fracture anisotropy, which shows cracks prefer certain crystallographic directions. The simulations reveal a key difference in bond breaking behavior between easy and difficult propagation directions.