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An effective approach to grow boron nitride nanowires directly on stainless-steel substrates

机译:直接在不锈钢基底上生长氮化硼纳米线的有效方法

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摘要

When growing one-dimensional (ID) nanomaterials via the vapour-liquid-solid (VLS) model, the substrates usually need to be coated with a layer of catalyst film. In this study, however, an effective approach for the synthesis of boron nitride (BN) nanowires directly onto commercial stainless-steel foils has been demonstrated. Growth occurs by heating boron and zinc oxide (ZnO) powders at 1100 deg C under a mixture of nitrogen and hydrogen gas flow (200 ml min~(-1)). The stainless-steel foils played an additional role of catalyst besides substrate during the VLS growth of these BN nanowires. The as-synthesized nanowires emit strong photoluminescence (PL) bands at 515, 535 and 728 nm. In addition, we found that the gas flow rate and the hydrogen content in the gas mixture strongly affected the diameter and yield of the nanowires by changing the relative concentration of the nanowire growth species in the chamber.
机译:当通过蒸气-液体-固体(VLS)模型生长一维(ID)纳米材料时,通常需要在基材上涂覆一层催化剂膜。但是,在这项研究中,已经证明了一种将氮化硼(BN)纳米线直接合成到商用不锈钢箔上的有效方法。通过在氮气和氢气流(200 ml min〜(-1))的混合物下于1100℃加热硼和氧化锌(ZnO)粉末来生长。在这些BN纳米线的VLS生长期间,除基材外,不锈钢箔还起着催化剂的作用。合成后的纳米线在515、535和728 nm处发出很强的光致发光(PL)带。另外,我们发现气体流速和气体混合物中的氢含量通过改变腔室中纳米线生长种类的相对浓度而强烈影响纳米线的直径和产率。

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