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Improving InAs nanotree growth with composition-controlled Au-In nanoparticles

机译：通过成分控制的Au-In纳米粒子改善InAs纳米树的生长

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摘要

Au nanoparticles are commonly used as seeds for epitaxial growth of III-V semiconductor nanowires. However, the interaction between Au and In-containing III-V materials makes it difficult to control the growth of more complex nanowire structures in materials such as InAs. Here we report the growth of InAs nanowires and branched nanotrees using Au and Au-In nanoparticles. We show that the initial composition of the particle does not affect the morphology of the first-generation nanowires, nor does it affect the final composition of the particle after growth. However, when the Au-In particles were used to seed a second generation of nanowires, producing nanotrees, the branches exhibited a 2-3 times higher growth rate and more regular shape than those seeded by pure Au particles. This result is attributed to the decreased interaction between the seed particle and the trunk nanowires when Au-In particles are used. Thus the incorporation of In into the seed particle during particle production allows for modification of the particle-wire interaction.
机译：金纳米颗粒通常用作III-V族半导体纳米线的外延生长的种子。然而，Au和含In的III-V材料之间的相互作用使得难以控制诸如InAs的材料中更复杂的纳米线结构的生长。在这里，我们报告了使用Au和Au-In纳米粒子生长InAs纳米线和分支纳米树的情况。我们表明粒子的初始组成不会影响第一代纳米线的形态，也不会影响生长后粒子的最终组成。但是，当使用Au-In粒子播种第二代纳米线以生产纳米树时，这些分支的生长速度和形状比纯Au粒子播种的要高2-3倍。该结果归因于当使用Au-In颗粒时种子颗粒与主干纳米线之间的相互作用降低。因此，在颗粒生产过程中将In掺入种子颗粒中可以改变颗粒-金属丝相互作用。

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