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首页> 外文期刊>Journal of Materials Research >Catalyst-free Synthesis And Cathodoluminescent Properties Of Zno Nanobranches On Si Nanowire Backbones
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Catalyst-free Synthesis And Cathodoluminescent Properties Of Zno Nanobranches On Si Nanowire Backbones

机译：Si纳米线主链上Zno纳米支链的无催化剂合成和阴极发光性能

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We report the catalyst-free synthesis of ZnO nanobranches on Si nanowires using metalorganic chemical vapor deposition. The formation of single-crystalline ZnO nanobranches on Si nanowire backbones has been confirmed by lattice resolved transmission electron microscopy. Depending on the growth parameters, especially the growth temperature, the morphology and size of the ZnO nanobranches evolved from nanothorn-shaped (at 350 ℃) to nanoneedle-shaped structures (at 500 ℃). When the growth temperature was further increased to 800 ℃, thin ZnO nanowire branches grew out of the Si nanowire backbones coated with thin ZnO shells, whereas no ZnO branch was formed on bare Si nanowires due to limited nucleation. The growth behavior was further exploited to fabricate ZnO/Si nanowire networks by growing the ZnO nanowires selectively on laterally aligned Si-ZnO core-shell nanowire arrays. In addition, cathodoluminescent properties of ZnO nanobranches on Si nanowire backbones are discussed with respect to position and size.
机译：我们报告了使用金属有机化学气相沉积在Si纳米线上无催化剂合成ZnO纳米支链。通过晶格分辨透射电子显微镜已证实在Si纳米线主链上形成单晶ZnO纳米支。取决于生长参数，特别是生长温度，ZnO纳米支的形态和大小从纳米刺状（350℃）演变为纳米针状结构（500℃）。当生长温度进一步提高到800℃时，薄ZnO纳米线分支从包覆有薄ZnO壳的Si纳米线主链中生长出来，而由于有限的成核作用，在裸露的Si纳米线上没有形成ZnO分支。通过在横向排列的Si-ZnO核-壳纳米线阵列上选择性生长ZnO纳米线，进一步利用生长行为来制造ZnO / Si纳米线网络。另外，关于位置和尺寸讨论了在Si纳米线主链上的ZnO纳米支的阴极发光性质。

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