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A steady-state dendrite growth model proposed for binary alloys, which assumes non-linear liquidus and solidus, was used to compare dendrite growth in undercooled Ni–0.7at.% B and Ni–1at.% Zr alloys. In comparison with Ni–0.7at.% B alloy, the effect of non-linear liquidus and solidus is strengthened in Ni–1at.% Zr alloy, so that non-linear growth occurs at the so-called linear stage at high undercooling.
ZnO nanotetrapods, ZnO nanowires and Zn nanowires were fabricated by the vapor deposition process at the different flow rates of the carrier gas (N 2 ). Further oxidation of the Zn nanowires led to the formation of ultra-fine ZnO nanoneedles. Photoluminescence (PL) spectra of ZnO nanocrystals exhibited a deep-level emission in the visible region and a near-band-edge emission in the ultraviolet...
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