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In this study, we demonstrated superconductivity in a fiber with an yttrium barium copper oxide core and fused silica cladding. The fibers were fabricated via a modified melt-draw technique and post-process annealing treatment in excess oxygen. The fibers maintained overall diameters ranging from 100-900 microns and core diameters of 50-700 microns. Superconductivity of this fiber design was validated via the traditional four-point probe test method in a bath of liquid nitrogen at temperatures on the order of 93 K. The high-temperature superconducting fiber provides a glimpse of its cross cutting potential in fields of electromagnetism, healthcare, optics, and energy and lends credence to the promise for superconductivity.

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In this study, TiO 2 nanoparticle suspensions are guided by templated molds to fabricate micrometer feature patterns and arrays. The effects of PEG with different molecular weights on suspension flowability and surface wettability between the PDMS molds and the TiO 2 suspensions on pattern formation are investigated. PEG 400 is the most desirable dispersant. The suspensions have the best wetting on the mold surface with 3 wt% TX-100 addition. Micrometer feature arrays with feature sizes ranging from 750 nm to 1.5 lm are obtained. Fundamental understanding, regarding suspension flowability, wetting, and the ability to make different feature sizes and shapes, is discussed. *klu@vt.edu