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首页> 外文期刊>Chemistry: A European journal >Ternary cobalt-iron phosphide nanocrystals with controlled compositions, properties, and morphologies from nanorods and nanorice to split nanostructures
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Ternary cobalt-iron phosphide nanocrystals with controlled compositions, properties, and morphologies from nanorods and nanorice to split nanostructures

机译：具有可控制的组成，性质和形态的三元钴铁磷化物纳米晶体，从纳米棒和纳米粒到分裂的纳米结构

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摘要

Structural phase-controlled formation of binary Co_2P and CoP nanocrystals is achieved by reacting cobalt(II) oleate with trioctylphosphine. In the absence of oleylamine, Co_2P nanowires are formed at both 290 and 320°C. In the presence of oleylamine, Co_2P nanorods are formed at 290°C, and CoP nanorods are formed at 320°C. With the simultaneous reaction of iron(III) oleate and cobalt(II) oleate with trioctylphosphine in the presence of oleylamine, ternary Co_2P-type cobalt-iron phosphide nanostructures are produced at both 290 and 320°C, corresponding to rice-shaped Co_(1.5)Fe_(0.5)P nanorods and split Co_(1.7)Fe_(0.3)P nanostructures, respectively. The controlled incorporation of iron into cobalt phosphide can alter the magnetic properties from paramagnetic binary Co_2P to ferromagnetic Co _2P-type ternary cobalt-iron phosphide nanostructures. Meanwhile, the time-dependent morphological evolution from small nanodotsanorods, through seeded growth to unique split nanostructures is demonstrated in one-pot reaction at 320°C.
机译：二元Co_2P和CoP纳米晶体的结构相控制形成是通过使油酸钴（II）与三辛基膦反应而实现的。在不存在油胺的情况下，在290和320°C均形成Co_2P纳米线。在油胺存在下，在290°C下形成Co_2P纳米棒，在320°C下形成CoP纳米棒。在油胺存在下，油酸铁（III）和油酸钴（II）与三辛基膦同时反应，在290和320°C时均生成三元Co_2P型钴铁磷化铁纳米结构，相当于大米状Co_（ 1.5）Fe_（0.5）P纳米棒和分裂的Co_（1.7）Fe_（0.3）P纳米结构。铁在磷化钴中的受控掺入可将磁性从顺磁二元Co_2P改变为铁磁Co _2P型三元钴铁磷化纳米结构。同时，在320°C的一锅反应中证明了从小纳米点/纳诺德到种子生长到独特的分裂纳米结构随时间的形态演变。

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