Face-selective electrostatic control of hydrothermal zinc oxide nanowire synthesis.

Face-selective electrostatic control of hydrothermal zinc oxide nanowire synthesis.
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DOI:
10.1038/nmat3069
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发表时间:
2011-07-10
期刊:
影响因子:
41.2
通讯作者:
--
中科院分区:
材料科学1区
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Rational control over the morphology and the functional properties of inorganic nanostructures has been a long-standing goal in the development of bottom-up device fabrication processes. We report that the geometry of hydrothermally grown zinc oxide nanowires,,,can be tuned from platelets to needles, covering more than three orders of magnitude in aspect ratio (~0.1–100). We introduce a classical thermodynamics-based model to explain the underlying growth inhibition mechanism by means of the competitive and face-selective electrostatic adsorption of non-zinc complex ions at alkaline conditions. The performance of these nanowires rivals that of vapour-phase-grown nanostructures,, and their low-temperature synthesis (<60 °C) is favourable to the integration andin situfabrication of complex and polymer-supported devices,,. We illustrate this capability by fabricating an all-inorganic light-emitting diode in a polymeric microfluidic manifold. Our findings indicate that electrostatic interactions in aqueous crystal growth may be systematically manipulated to synthesize nanostructures and devices with enhanced structural control.
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