Posts

Showing posts with the label copper

Fabric8 3D-prints pure copper cold plates that reduce the energy required to cool data centers by 50X

https://www.eurekalert.org/news-releases/1126418 "pure copper high thermal conductivity (398 W/m·K) but 3D printers use lasers to melt copper powder into complex, microscopic fins facilitating cooling but often results in fragile, porous parts... overcome growing copper at atomic level from liquid solution; algorithm evolves cooling fins' shape finding maximum heat dissipation/ minimum fluid resistance balance providing 32% better cooling performance... significantly reduced pumping energy need... 1-GW data center would require only 11 MW for cooling"
Post a Comment
Read more

Scalable fabrication of copper foil to simultaneously exhibit strength, conductivity and thermal stability

https://www.globaltimes.cn/page/202604/1359254.shtml "stronger copper usually requires adding alloys like beryllium, but blocks electron flow... high conductivity requires high purity, but softens/ weakens... small copper grains grow/ merge when heated causing weakness over time... overcome embedding 3 nm structures throughout, pinning copper’s grain boundaries in place providing: 2X strength, no strength degradation after 6+ months (thermal stability), only slightly reduced conductivity (electron scattering minimized)... batteries, AI hardware, aerospace" Related: Strong graphene bulk composites with high thermal conductivity https://www.eurekalert.org/news-releases/1127271
Post a Comment
Read more

Bio-inspired copper composite achieves zero thermal expansion while maintaining high thermal conductivity and mechanical toughness

https://techxplore.com/news/2025-12-bio-copper-composite-thermal-expansion.html "trade-off between materials' expanding when heated/ good (non-brittle) heat conductors, overcome mimicking abalone nacre brick-and-mortar" structure/ bamboo transport membranes... laminated copper foil layers provide continuous thermal conductivity 3X higher... reinforced with negative-thermal-expansion particles... prevents catastrophic failure by deflecting cracks, increasing flexural fracture energy to 53 kJ·m⁻², 4X that of the monolithic composite... achieves zero expansion in all directions"
Post a Comment
Read more

Hierarchical porous copper nanosheet outputs 590% more electricity compared to standard copper thin-film triboelectric nanogenerators

https://www.eurekalert.org/news-releases/1111546 "overcomes 2D metal nanosheet's low current output/ poor durability... stable over 100K mechanical cycles, spray-coating process scalable... converts walking, breathing into electricity... continuous battery-free heart rate/ temperature/ physical activity monitoring, energy harvesting, EMI shielding, Joule heating (smart clothing/ thermal comfort)"
Post a Comment
Read more

Scalable, universal, texture controlled growth of large-scale single-crystal copper foils exhibiting highly ordered, grain-boundary-free lattices

https://www.eurekalert.org/news-releases/1104913 "typically uses rolled precursors having structural heterogeneity, impeding control/ scalability... overcome using strain–energy–texture framework involving: tailored cold rolling, controlled low-temperature recrystallization, high-temperature annealing... optimal deformation window (4.5–5.0 true strain) where cube texture fraction exceeds 90%, enabling reliable single-crystal growth... fabricated 33×20cm2 Cu(111) foil, and foils with 6 distinct high-index orientations... for: cast, rolled, electrodeposited, also applies to nickel"
Post a Comment
Read more

Chip-scale processor and 3D-printed antenna arrays using ink based on copper nanoparticles, for flexible and wearable wireless systems

https://www.eurekalert.org/news-releases/1102169 "antennas remain stable/ high-performing even when bent or exposed to high humidity/ temperature variations, salt... processor chip can correct errant signals from the flexible antenna in real-time, compensating for material deformation and vibrations... smart textiles, drone or aircraft communications, edge sensing, and various applications in the auto, aviation, and space industries"
Post a Comment
Read more

Perovskite with copper nanoatalyst and sunlight converts CO2 into hydrocarbons for clean fuel, chemical and plastic production

https://www.eurekalert.org/news-releases/1072103 "produces ethane/,ethylene,  glycerate, lactate, formate... also input water/ glycerol (oxidized using silicon nanowire electrodes)... 200X better (by using glycerol) than earlier systems splitting water and CO2... design of catalyst’s surface area influences which products generated... making the process more selective... current CO₂-to-hydrocarbon selectivity remains around 10%, but researchers are optimistic about improving catalyst design to increase efficiency" Related: Chemists discover new method to transform carbon dioxide to formate https://phys.org/news/2025-03-chemists-method-carbon-dioxide-formate.html#google_vignette Novel material holds promise for tech to convert CO2 into fuel https://www.eurekalert.org/news-releases/1077937 Turning carbon dioxide into fuel just got easier, thanks to acid bubbles https://www.eurekalert.org/news-releases/1086660 Nickel catalyst opens door to sustainable, branched hydrocarbon fuels...
Post a Comment
Read more

Low-temperature, quicker nanocrystalline direct copper-to-copper bonding advances next-gen electronic chip packaging manufacturing

https://techxplore.com/news/2025-01-temperature-copper-bonding-advances-gen.html "valuable for industrial mass production... overcomes many grain boundaries where impurities tend to concentrate, with gentle heating grains grow on the top surface but not bottom... strategic dual-layer design where coarse-grain layer impurity sink, preventing void formation near copper seed layer.... Nanocrystalline copper over coarse-grain layer... integrate different types of chips—especially those sensitive to heat—into compact, high-density 3D structures... AI, 5G networks, AR, VR"
Post a Comment
Read more