Articles tagged with Dielectrics
Researchers developed a theory of relaxation in hexagonal ice, which can indicate water purity and quality through dielectric polarization changes. The study used spectroscopy to analyze ice under different temperatures, revealing non-Arrhenius behavior.
Researchers from Politecnico di Torino and NUST MISIS create a new metamaterial that cloaks nano-sensors, improving their accuracy in optics and biomedicine. The development is part of the Italian-Russian project ANASTASIA, funded by Compagnia di San Paolo.
Researchers have discovered a way to make a thin material that enhances the flow of microwave energy by exploiting domain walls. This discovery could improve telecommunications by expanding the range of frequencies used as communications channels.
Researchers at Argonne National Laboratory used novel tools to study local order in relaxor ferroelectrics, revealing a correlation between butterfly-shaped diffuse scattering and piezoelectric behavior. This discovery could lead to the development of non-lead-based materials with improved properties.
A recent study published in Science reveals that atomically thin layers of water near solid surfaces exhibit no electric response, with a thickness of less than one nanometer. This finding has significant implications for understanding the role of water in biological molecules, proteins, and technological processes.
A collaborative team of YNU and NTT researchers successfully observed petahertz electron oscillation, achieving the fastest measured in direct time-dependent spectroscopy. They characterized individual dephasing times and revealed benefits for controlling optical phenomena in electronic and photonic devices.
Researchers at NUST MISIS developed a theory explaining how latent state formation occurs in layered tantalum disulfide, leading to ultra-fast memory capabilities. The material's nano-structural mosaics and charged vacancies contribute to its switching and memory effects.
A study by the Solid State Physics Group at São Paulo State University found that certain materials exhibit exotic behaviors, including a
Physicists at MSU used high harmonics spectroscopy to study the behavior of electrons in a dielectric material. They found that ultra-short laser pulses can turn the material into a conductor by increasing its kinetic energy and changing its many-body state.
A nanostructured gate dielectric has improved the stability of organic thin-film transistors, allowing them to operate in ambient conditions and enabling potential applications in IoT devices and large flexible displays.
Researchers used condensed matter physics to characterize proteins as amorphous semiconductors. They found the Universal Dielectric Response (UDR) applies to three organic materials, including Shewanella oneidensis MR-1 bacterium.
Researchers create a subwavelength dielectric resonator that can trap light for an extended period due to destructive interference, allowing for more efficient optical devices. The structure is capable of suppressing energy leakage and keeping light for ten times longer than conventional resonators.
Researchers at Toyohashi University of Technology have developed liquid crystalline molecules with alkylthio groups containing sulfur, exhibiting nematic liquid crystal phases at room temperature. These molecules show improved optical properties and potential applications in liquid crystal displays and other fields.
Researchers have developed a new material that combines high-refractive-index material and magnetic garnet to yield ten times enhanced performance. The material, amorphous tantalum yttrium oxide, retains transmissivity after thermal treatment at 850°C.
Researchers measured optical and electrical properties of thin carbon nanotube films, finding that they exhibit conductive behavior with few energy barriers. The team used terahertz-infrared spectroscopy to analyze the charge transfer mechanisms in these films.
Semiconducting carbon nanotubes (CNTs) can significantly reduce crosstalk-induced noise in carbon nanotube-based VLSI interconnects. By acting as insulating shields, CNTs inhibit carrier movement and lower the radial dielectric constant, resulting in a 28% reduction of crosstalk.
Researchers at KAIST developed ultra-flexible organic flash memory that can be applied to non-conventional substrates like plastics and papers. The memory technology exhibits a significantly-long projected retention rate with programming voltages on par with industrial standards.
Researchers from RMIT University have created two-dimensional materials no thicker than a few atoms using liquid metal, revolutionizing chemistry and electronics. The breakthrough could lead to better, more energy-efficient electronics and new applications in catalysis.
Researchers are developing artificial muscle and tendon structures for more comfortable and efficient prosthetics, mimicking human muscles. The project aims to create dexterous, compliant, and affordable prostheses using smart materials with built-in actuation and sensing capabilities.
Researchers developed a material that can shrink the diameter of waveguides and control waveguide characteristics with unprecedented flexibility. The conformal coating solves crosstalk and blockage problems, enabling smaller waveguides to be more closely bundled.
A new composite material made from a combination of polymers and hexagonal boron nitride nanosheets has been developed by Penn State researchers. This material can store energy at operating temperatures above 176 degrees Fahrenheit, outperforming current commercial polymers.
Researchers systematically examine available high-index materials for their resonances in visible and infrared ranges. Crystalline silicon is identified as the best material for dielectric antennas operating in visible range, while germanium outperforms other materials in infrared band.
Researchers have observed giant charge reversal for the first time, where excess counter ions adsorb to oppositely charged surfaces. The study suggests that dielectric response of the solvent enhances correlation of multivalent ions with surface groups, leading to the formation of Bjerrum pairs.
Researchers from Lomonosov Moscow State University directly measured giant resonant fields in subwavelength dielectric particles, overcoming measurement difficulties by using radio waves. The study provides theoretical explanation and has potential applications in medicine, biology, telecommunications, and optical computing.
Researchers at Lanzalab developed a compact model to describe the functioning of RRAM devices using graphene/h-BN/graphene van der Waals structures. The model accurately predicts the device's behavior and explains dispersion in cycle-to-cycle data, enabling simulation and mass production.
An international team of physicists has monitored electron scattering behavior in a non-conducting material in real-time. The study reveals that electrons oscillate and collide with atoms within the material, causing energy loss, which could benefit radiotherapy.
Researchers at Berkeley Lab expand the temperature range of ferroelectric materials by creating a polarization gradient in a thin film. This enables devices to operate reliably in extreme environments, reducing power consumption and component count.
Researchers at USC Viterbi are working on three MURI projects: one on cybersecurity to combat increasing threats, another on advancing quantum computing, and a third on developing improved polymers for energy use. These grants bring $8.4M in funding to support innovative research in these areas.
Scientists have discovered a new phenomenon called the photodielectric effect, which could lead to the creation of laser-controlled touch displays. The discovery uses light to increase the dielectric permittivity of a material, allowing for more efficient energy storage and filtering.
Researchers have created a way to make metamaterials with a single inclusion, providing easier fabrication and tailoring light-matter interactions. This 'photonic doping' technique has implications for flexible photonics, information processing systems, and telecommunications applications.
Researchers at Sandia National Laboratories have developed a new type of metamaterial using III-V semiconductors that can be used to create ultra-efficient optical devices. The materials offer a wide range of tunable properties, including the ability to manipulate light and generate entangled photons.
Dielectric heating accelerates chemical reaction rates, allowing for rapid synthesis of organic compounds with high yield. Various applications of microwave-induced reactions are reported in pharmaceutical industries, combinatorial chemistry, and library synthesis.
Researchers have developed a family of resistive random access memories using multilayer hexagonal boron nitride as dielectric, showing promising retention times and low cycle-to-cycle variability. The devices exhibit coexistence of forming free bipolar and threshold-type resistive switching.
Electrical engineers at Duke University have created a metal-free metamaterial that can absorb electromagnetic energy, opening doors for applications in imaging, sensing, and lighting. The device's ability to absorb energy without heating up has direct implications for thermal imaging devices and efficient lighting systems.
Researchers developed a transparent, self-healing, highly stretchable conductive material that can be electrically activated to power artificial muscles. The material has potential applications in robots, biosensors, and electronic devices, offering improved durability and efficiency.
Controlling polymer chain conformations may enable fast and flexible electrical circuits, revolutionizing the field of flexible electronics. Researchers developed new polymers that increase mobility in organic thin film transistors by over 10 times.
Researchers developed a new electroactive polymer material that can change shape and size with low electric fields, overcoming two major challenges in using dielectric elastomers. This breakthrough opens up applications in microrobotics, haptic technologies, and wearable devices.
Researchers at UCSB explore the delicate balance between coherence and control with a simple yet complete platform for quantum processing. They successfully integrated the control of three superconducting qubits, creating an artificial magnetic field that allowed photons to interact strongly with each other and the pseudo-magnetic field.
Researchers at NICT have developed a flexible optical design method for superconducting nanowire single-photon detectors, enabling high detection efficiency over a precise spectral range while rejecting other wavelengths. This technique has potential applications in quantum cryptography, fluorescence spectroscopy, and remote sensing.
UCSB researchers create high-performance tunable dielectrics using molecular beam epitaxy, overcoming material quality issues. The advancement enables adaptive electronic systems with potential applications in cellular communications and phased-array antennas.
Designing new materials requires collaboration between theory, synthesis, and characterization. Researchers at Penn State used subatomic microscopy to study strain-induced ferroelectricity in a layered oxide, which could lead to new classes of materials with useful properties.
A new experiment reproduces nature's patterns with a specially designed system called an H-shaped dielectric barrier discharge system. The system produces filaments of discharge plasma that can assume vast ranges of patterns in 3D, allowing scientists to explore complex mechanisms behind nature's diverse designs.
A team of Penn State materials scientists has developed a unique three-dimensional sandwich-like structure that protects the dense electric field in the polymer/ceramic composite from dielectric breakdown. The material has been shown to have high energy density, power density and excellent charge-discharge efficiency, making it highly ...
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a dielectric elastomer with broad motion range that requires relatively low voltage and no rigid components. This innovation addresses key challenges in soft actuation and opens doors for various applications in soft robotics.
A recent study using a highly sensitive blood coagulation test called dielectric blood coagulometry (DBCM) found that non-Atrial Fibrillation patients with high CHADS2 scores exhibited hypercoagulability. DBCM detected small changes in blood coagulation, particularly in those at higher risk of stroke.
Researchers have developed a soft actuator that allows robots to move freely without harming humans. The actuator uses hyperelastic membranes and electric fields to control movement, enabling robots to give way in case of doubt, making them suitable for applications where human safety is a concern.
Researchers created a self-healing electronic material that can restore all its properties needed for use in wearable electronics, including mechanical strength and electrical resistivity. The material is tough and able to self-heal due to boron nitride nanosheets connecting with hydrogen bonding groups.
Scientists at NRL devised a novel combination to achieve uniform nanometer-thick shell on core particles, regardless of core size. This breakthrough technology creates new designer core/shell particles for multifunctional nanocomposites.
Researchers at Penn State University have developed a unique blend of ferroelectric polymers that can hold absorbed heat even after the external field has been switched off. This allows the material to generate cooling when the field is turned on, but no subsequent heating when the field is turned off.
Researchers at Hokkaido University are developing perovskite ceramic capacitors with improved insulating properties. The process involves sintering and annealing the material to exhibit ferroelectricity, a promising dielectric property for multi-layered ceramic capacitors.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences designed a tunable, self-actuated 3-D material that can alter its size, volume and shape. The structure is inspired by origami techniques and can be programmed to deform specific hinges using embedded pneumatic actuators.
UConn researchers develop a systematized approach to materials design using machine learning. They create numerical fingerprints of polymers based on atomic configurations, enabling computers to quickly scan theoretical compounds for desired properties. The breakthrough has the potential to revolutionize the search for new materials.
Scientists at RMIT University and the University of Adelaide developed a stretchable device that can filter specific colors while remaining transparent. This technology has the potential to make smart contact lenses that can filter harmful optical radiation without interfering with vision.
Researchers have developed a new nondestructive technique to study phase transitions at the nanoscale, revealing insights into ferroelectric materials. This approach uses acoustic response to detect changes in material behavior and can guide efforts to design next-generation materials with enhanced properties.
Researchers at the University of Luxembourg have discovered a high-k-material that enables better energy storage devices, which could lead to smaller, faster and more efficient electronics. The material's unique dielectric properties allow it to generate strong electric fields, making it suitable for capacitors.
Scientists at the University of Auckland have created a soft, flexible, and stretchable keyboard using dielectric elastomers. The keyboard can flex and stretch, recovering from drops and impacts, making it ideal for various applications such as gaming and motion capture.
Researchers at the University of Delaware have successfully developed a new method to increase the energy storage ability of dielectric capacitors using nanotechnology. The innovation achieves an energy density of about two watt hours per kilogram, significantly higher than existing structures.
Researchers at Helmholtz-Zentrum Berlin improved ultrathin CIGSe solar cells by integrating nanoparticles into the back contact, resulting in increased efficiency and reduced charge carrier loss. This innovative approach enables more efficient light trapping and absorption, paving the way for further design enhancements.
A new dielectric film has been developed with a refractive index as low as 1.025, allowing for improved optical properties in photonic devices. The film's mechanical stability is also enhanced, making it suitable for incorporation into electronic devices.
Scientists have developed a new method to analyze the movement of specific atoms in dielectric materials when exposed to an electric field. This technique uses X-rays and advanced mathematical analysis to determine changes in atomic placement within the crystalline structure of the material.