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Aligned Growth of ZnCdSe Nano-arrowheads

机译:ZnCdSe纳米箭头的定向生长

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Aligned ZnCdSe alloy nanostructure have been grown on GaAs (100) substrates using metalorganic chemical vapor deposition. Scanning electron microscopy observations find that they resemble nano-arrowheads in having three-blades, and their long axis is aligned along either the [1 (1) over bar1] or the [11 (1) over bar] direction of the substrate. Transmission electron microscopy shows that the blades of the nano-arrowhead have a (0 (1) over bar 13) twin relationship with each other and that their flat surface is close to ((2) over bar 110). Cathodoluminescence studies reveal that non-radiative recombination centers are localized at the twin boundaries. A four-step growth process, combining epitaxy, stacking fault generation, nanotetrapod nucleation, and vapor-liquid-solid growth, is suggested to understand the three-bladed morphology and alignment directions of the nano-arrow heads.
机译:对齐的ZnCdSe合金纳米结构已经使用有机金属化学气相沉积法在GaAs(100)衬底上生长。扫描电子显微镜观察发现,它们类似于具有三片刀片的纳米箭头,并且其长轴沿着基材的[1(1)穿过bar1]或[11(1)穿过bar]方向对齐。透射电子显微镜显示,纳米箭头的叶片彼此之间具有(0(1)在杆13上)的孪生关系,并且它们的平坦表面接近(在杆110上((2)))。阴极发光研究表明,非辐射重组中心位于孪生边界处。建议通过四步生长过程,将外延,堆垛层错生成,纳米四脚形成核和汽液固相生长相结合,以了解纳米箭头头的三叶形形态和排列方向。

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