Beyond Copper: The Conductors, Coolants, and Light Links Chasing a 150-Year-Old Metal
America's New Invention Could Replace Copper Forever - YouTube Materials science & power systems A wave of 2025–2026 results shows real ways to move charge, heat, and data without copper. None of them retire the metal — and the hype badly outruns the physics. Feature · Analysis Updated September 2026 BLUF Copper is not becoming obsolete, but for the first time in a century it faces credible competition in specific, high-value niches. Between late 2025 and mid-2026, peer-reviewed results and shipping products emerged in four areas where copper is the bottleneck: chip interconnects (Cornell's niobium-arsenide nanowires), heat removal (UCLA's record-setting θ-phase tantalum nitride), lightweight bulk conductors (carbon-nanotube fibers from IMDEA in Madrid; copper–graphene composites from PNNL), and data movement (Avicena's microLED optical links that replace copper GPU cabling with light). The pressure is real: copper set record...