Abstract
We present a general approach to growing ZnO nanowires on arbitrary, high melting point (above970 °C) substrates using the vapor–liquid–solid (VLS) growth mechanism. Our approach utilizesthe melting point reduction of sufficiently small (5 nm diameter) Au particles to provide aliquid catalyst without substrate interaction. Using this size-dependent melting effect, wedemonstrate catalytic VLS growth of ZnO nanowires on both Ti and Mo foil substrateswith aspect ratios in excess of 1000:1. Transmission electron microscopy shows thenanowires to be single-crystalline, and photoluminescence spectra show high-quality opticalproperties. We believe this growth technique to be widely applicable to a variety ofsubstrates and material systems.
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