Rayleigh-instability-induced metal nanoparticle chains encapsulated in nanotubes produced by atomic layer deposition
Rayleigh-instability-induced metal nanoparticle chains encapsulated in nanotubes produced by atomic layer deposition
复制标题
DOI：
10.1021/nl0721766
复制
发表时间：
2008-01-01
期刊：
影响因子：
10.8
通讯作者：
Knez, Mato
中科院分区：
文献类型：
--
作者：
Qin, Yong;Lee, Seung-Mo;Knez, Mato
通过在足够高的温度下还原嵌入Al2O3中的CuO纳米线，成功地以可控的方式生成了包裹在Al2O3纳米管中的Cu纳米颗粒链。通过原子层沉积（ALD）沉积Al2O3涂层。颗粒主要呈棒状，分布规则。对应于管的内径和长度的粒径和链长分别由CuO纳米线模板的尺寸控制。瑞利不稳定性，由氧化物还原成金属所产生的均匀体积收缩的辅助下，提出诱导形成的纳米链。这种方法可以潜在地扩展到通过还原嵌入ALD壳中的相应氧化物纳米线来合成其他金属的纳米链。
Cu nanoparticle chains encapsulated in Al2O3 nanotubes were successfully generated in a controlled manner by reduction of CuO nanowires embedded in Al2O3 at a sufficiently high temperature. The Al2O3 coating was deposited by atomic layer deposition (ALD). The particles mainly show a rodlike shape and are regularly distributed. The particle diameters and chain lengths corresponding to the inner diameters and lengths of the tubes, respectively, are controlled by the size of the CuO nanowire templates. Rayleigh instability, assisted by the uniform volume shrinkage created by the reduction of oxide to metal, is proposed to induce the formation of the nanochains. This method may potentially be extended to the synthesis of nanochains of other metals by reducing corresponding oxide nanowires embedded in ALD shells.