James Heath of California Institute of Technology has created an array of nanowires that are superconducting at relatively high temperatures which is difficult to fabricate because maintaining crystal structure and other properties is not easy. This is made of high-Tc nanowires using a widely known high-Tc material, a copper-oxide compound (YBCO). The nanowires were fabricated from YBCO strips into arrays of up to 400 nanowires each, lined up in parallel. Metal contacts are run across the wires perpendicularly so that their electrical properties could be measured. This high-Tc nanowire exhibits both superconducting and normal resistive behavior over a wide temperature range—greater than 50 K. This feature could be useful in nanowire-based superconducting quantum-interference devices which are used to measure extremely small magnetic fields.