Articles tagged with Thermal Conductivity
Researchers developed a room-temperature bonding technique that integrates wide bandgap materials like gallium nitride with thermally-conducting materials like diamond. The interface layer is just four nanometers thick, allowing for two times more efficient heat dissipation.
Researchers used quantum mechanical computations to study the thermal conductivity of postperovskite at lower mantle conditions. The study found a significant jump in thermal conductivity associated with phase transition, which affects heat flux across the core-mantle boundary.
Researchers create a novel material with different thermal conduction properties depending on direction, combining the benefits of insulation and heat dissipation. The material's unique structure allows for efficient transfer of heat within layers while blocking it perpendicular to the layers.
Researchers confirmed the high thermal conductivity of isotopically enriched cubic boron nitride, a discovery that could lead to breakthroughs in cooling microelectronics. The team made the unique compound and measured its thermal conductivity, confirming theoretical predictions and opening up new avenues for research.
Researchers have discovered a much larger transverse figure of merit in topological semimetals compared to their longitudinal counterparts. This is attributed to the coexistence of electrons and holes contributing additively and high charge mobility without lattice imperfections.
Researchers at the University of Illinois have developed a new heat model that can help improve the thermal conductivity and reduce defects in gallium nitride semiconductors. This could lead to longer-lasting electronic devices with improved reliability.
Scientists have successfully measured thermal transport through single-molecule junctions for the first time, revealing that heat transfer is length-independent. The breakthrough uses custom-developed calorimetric-scanning-thermal-microscopy technique to determine thermal conductance, which originates from atomic vibrations or phonons.
Researchers at the University of Bristol have successfully demonstrated a new material's ultra-high thermal conductivity, twice that of copper. This breakthrough paves the way for energy-efficient devices in mobile phones, radars, and electric cars, leading to better performance and safety.
Researchers have designed a novel polymer that can switch its thermal conductivity in response to light, enabling on-demand heat routing. The material's unique behavior has potential applications in managing heat for sensitive electronics and keeping electrical devices warm.
Researchers developed a new method to predict lattice thermal conductivity of solids with high accuracy, removing the need for fitting parameters. This improvement enables more precise design of thermally resistive materials, including those used in thermoelectrics.
Researchers at UVA have invented a material with the ability to switch between insulating and cooling, making it suitable for applications such as smart fabrics and active wear. This technology has potential game-changing applications in various fields, including athletics and energy production.
Scientists have developed a new class of materials inspired by squid DNA that can control thermal conductivity, which could lead to improved fabrics for athletic wear. The materials' thermal conductivity increases dramatically when wet, allowing them to 'flip' a switch and remove heat from the body.
Researchers at the University of Illinois and Texas have optimized boron arsenide crystal growth to create materials with excellent thermal properties. The new material can effectively dissipate heat, outperforming existing heat spreaders three times over.
A UH-led team has reported synthesizing a crystal grown from boron and arsenic elements with far higher thermal conductivity than any other semiconductors and metals. The discovery could address technological challenges in cooling electronic devices, which is crucial for high power density electronics.
Scientists have created high-thermal-conductivity crystals of boron arsenide that could help manage heat in computer chips. The new material's properties make it comparable to silicon, a key component of current chip technology.
Researchers at Chalmers University of Technology have developed a graphene assembled film with over 60% higher thermal conductivity than graphite film. The graphene film's high thermal conductivity is attributed to its large grain size, high flatness, and weak interlayer binding energy.
Researchers from Kazan University and Russian Academy of Sciences proved that graphene maintains the causality principle in its conductivity. The study found that graphene's real and imaginary parts satisfy Kramers-Kronig relations precisely.
Scientists at NUST MISIS have developed composites that can efficiently remove heat from electronic devices, potentially replacing traditional materials like fiberglass. The new material has high thermal conductivity and mechanical properties, making it suitable for use in smartphones and other electronics.
A team of MIT engineers has developed a polymer thermal conductor that can dissipate heat more efficiently than traditional insulators. The new material is lightweight and flexible, conducting 10 times as much heat as most commercially used polymers.
The study investigates how chain conformation influences thermal conductivity in amorphous polymers, revealing that ultra-thin polymer nanofibers exhibit higher thermal conductivity due to aligned molecular chains. An empirical function is proposed to describe the diameter dependence of chain conformation.
A novel system, called a thermal resonator, converts daily temperature swings into electrical power. The device takes advantage of the ambient temperature fluctuations that occur during the day-night cycle, making it suitable for remote sensing systems without requiring batteries or other power sources.
Chinese physicists manipulate heat transfer to reduce waste and create invisible thermal cloaks. Their experimental results confirm equations predicting thermal conductivity of periodic materials.
Scientists have developed a technique to map thermal conductivity at the nanoscale, enabling more efficient thermoelectric materials. This breakthrough uses scanning thermal microscopy to analyze three-phase thermoelectric materials and determine their local thermal conductivity.
An international team of physicists has made a breakthrough in understanding heat transport at the nanoscale by studying a chain of gold atoms. The study confirms the validity of the Wiedemann-Franz law, which describes the relationship between electric and thermal conductance.
Carnegie Mellon researchers develop 'thubber,' a stretchable, thermal conductive material with metal-like properties. The material enables rapid heat dissipation in applications like wearable computing and soft robotics.
Scientists have found that electrons in vanadium dioxide move in unison, making it a poor conductor of heat. The material's unique properties make it suitable for applications like thermoelectric systems and window coatings.
Researchers have discovered that localized vibrations in amorphous silicon dioxide contribute substantially to the material's thermal conductivity, contradicting previous assumptions. This breakthrough could lead to more efficient forms of everyday materials and even superconducting materials.
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.
Researchers discovered the cause of vastly different thermal conductivities in superatomic structural analogues, directly related to rotational disorder within those structures. This finding enables the creation of materials with potential applications in sustainable energy generation, energy storage, and nanoelectronics.
Researchers at UC Riverside created a compact, fast voltage-controlled oscillator device using TaS2-BN-Graphene materials. The new technology could become an ultralow power alternative to silicon-based devices in various applications.
Researchers directly measured the thermal conductivity of iron at pressures and temperatures corresponding to planetary core conditions for the first time. The results, published in Nature, contradict theoretical calculations and resolve a long-standing debate about the so-called geodynamo paradox.
Researchers developed a versatile platform for nanoscale thermal measurements using magnetic resonance, optical, and atomic force microscopy. The technique provides nanometer-resolved thermal conductivity maps and can be used to investigate heat flow in nanostructures and catalytic exothermal reactions.
Researchers have developed a theoretical description of thermal conduction, accounting for both atomic and electronic behavior, allowing for accurate numerical simulations. This breakthrough enables scientists to study complex materials and processes, such as those found on planets, with unprecedented precision.
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.
Researchers developed a graphene-based film that efficiently cools electronics by increasing thermal conductivity to four times that of copper. The film can be attached to silicon components, overcoming previous adhesion issues, and has been tested with an additive creating stronger silane bonds, resulting in improved heat transfer.
Researchers at Sandia National Laboratories have made the first measurements of thermoelectric behavior in a nanoporous metal-organic framework (MOF), a discovery that could lead to more efficient cooling and energy harvesting applications. The material, known as TCNQ@MOF, exhibits high Seebeck coefficient and low thermal conductivity.
Scientists discovered that surface oxidation significantly impacts thermal conductivity in silicon nanostructures, allowing for a huge reduction of heat conduction. Removing native oxide improves thermal conductivity, while successive re-oxidation lowers it again.
Researchers at Sandia National Laboratories have found a way to alter the thermal conductivity of widely used material PZT using a small electric voltage. This breakthrough could lead to new technologies where controlling phonons is necessary, and has potential applications in computing, global communications, and other fields.
Research at the University of Missouri discovered that thermal paper receipts from cash registers are a significant source of bisphenol A (BPA) in humans. The study found that subjects who handled thermal paper and then touched their faces or food experienced rapid BPA absorption, leading to high blood levels.
Scientists have developed a way to modulate the thermal conductivity of lithium cobalt oxide, a key material for rechargeable batteries. This breakthrough enables dynamic control of heat evolution and dissipation, leading to improved performance and safety.
Researchers have found that graphene's thermal conductivity increases with the number of layers, but still falls short of idealized values. The team is exploring novel ways to support graphene, including three-dimensional interconnected foam structures and hexagonal boron nitride.
Researchers have finally found a theoretical explanation for the differences in thermal conductivity between similar materials, which could lead to the discovery of new thermoelectric materials. The findings are reported in the journal Nature Communications and were partly supported by the U.S. Department of Energy.
Researchers have developed a thermal interface material that can conduct heat 20 times better than traditional polymers, allowing for reliable operation at temperatures of up to 200 degrees Celsius. The new material could improve thermal management in electronic devices, such as servers and mobile devices.
Scientists at the University of Jyväskylä, Finland, have demonstrated that it's possible to change a material's thermal conductance by tuning the wave-like properties of heat flow. By fabricating a nanoscale mesh structure, they were able to reduce phonon thermal conductance by almost an order of magnitude.
Researchers developed a new heat-based technique for counting and measuring microscopic particles, offering advantages in simplicity, affordability, and versatility. The technique has been tested effectively for objects in the 200 micron to 90 micron range and is expected to be able to measure individual cells.
A team from the University of the Basque Country has repeated an experiment that previously found spider silk to be an excellent thermal conductor. Their results show a significant decrease in thermal diffusivity, with values up to 300 times smaller than those reported earlier.
Researchers have successfully simulated pressure conditions in the deep lower mantle, measuring thermal conductivity and finding heat transfer to be lower than expected. The study estimates a total heat flow of 10.4 terawatts across the Earth, about 60% of human civilization's power usage.
Researchers at the University of Oregon have developed a game-changing approach to synthesize thousands of new compounds with ultra-low thermal conductivity. The team designed layered elemental precursors that self-assemble into metastable compounds with predictable nano-architectures and specific crystallographic orientations.
Researchers from Boston College and Naval Research Laboratory discovered boron arsenide's unexpectedly high thermal conductivity, rivaling that of diamond. The material's unique vibrational properties allow for efficient heat conduction at specific frequencies.
A Korean team of mechanical engineers has created a novel nanoscale biosensing technique to detect uniform heat signatures from individual cells. This innovation allows for the measurement of cell viability and may lead to early diagnosis of diseases like cancer based on differences in thermal properties.
University of Toronto researchers have developed a new tool to measure the thermal and vibrational properties of solids, which could lead to more efficient electronic devices. The tool allows for a clearer picture of how an electronic device's ability to dissipate heat shrinks with its size.
A team of researchers developed a new method to significantly increase heat transfer rate across different materials by sandwiching an ultrathin layer of 'nanoglue' between copper and silica. The approach demonstrated a four-fold increase in thermal conductance, promising new innovations in cooling and energy applications.
The Helmholtz Alliance LIMTECH aims to increase the energy and resource efficiency of liquid metal technologies. Liquid metals are used in various industrial branches due to their high thermal conductivity and ability to store large quantities of energy.
Researchers used diamond anvil cells to apply extreme pressure to argon, heating it with microsecond laser bursts to 2,500 degrees K. The results confirmed kinetic theory as a better model for argon's thermal conductivity than Green-Kubo formalism.
A North Carolina State University researcher has created a more efficient cooling method for electronic devices using a copper-graphene composite. The new material cools devices up to 25% faster than current materials and reduces costs by replacing expensive copper with graphene.
Researcher Xinwei Wang found that spider silk conducts heat better than most materials, including silicon and aluminum, with a rate of 416 watts per meter Kelvin. Spider silk also exhibits an abnormal increase in thermal conductivity when stretched.
Researchers at UC Riverside have made a significant discovery in graphene's thermal conductivity, showing that isotopically engineered graphene can conduct heat more efficiently than natural graphene. This finding has the potential to impact various applications, including electronics, photovoltaic solar cells and radars.
Researchers discovered that bundling boron nanoribbons can significantly increase their thermal conductivity. The flat surface structure of the nanoribbons allows for tighter contact between individual structures through van der Waals interactions, enabling efficient phonon transmission and enhanced heat transfer.
Researchers at Vanderbilt University discovered a new way to enhance thermal conductivity, allowing for cooler computer chips and lasers. The technique involves controlling the interface between two thin strips of material, such as boron nanoribbons, with different solutions.
Phase change materials exhibit surprisingly low thermal conductivity in both crystalline and amorphous states. The researchers found that resonance bonding between atoms in the crystalline state impairs heat conduction. This property makes phase change materials suitable for developing fast, non-volatile, and energy-saving main memories.