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Nano-welding and junction formation in hydrogen titanate nanowires by low-energy nitrogen ion irradiation

机译：低能氮离子辐照钛酸氢纳米线的纳米焊接与结形成

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Crystalline hydrogen titanate (H2Ti3O7) nanowires were irradiated with N+ ions of different energies and fluences. Scanning electron microscopy reveals that at relatively lower fluence the nanowires are bent and start to adhere strongly to one another as well as to the silicon substrate. At higher fluence, the nanowires show large-scale welding and form a network of mainly 'X' and 'Y' junctions. Transmission electron microscopy and Raman scattering studies confirm a high degree of amorphization of the nanowire surface after irradiation. We suggest that while ion-irradiation induced defect formation and dangling bonds may lead to chemical bonding between nanowires, the large scale nano-welding and junction network formation can be ascribed to localized surface melting due to heat spike. Our results demonstrate that low energy ion irradiation with suitable choice of fluence may provide an attractive route to the formation and manipulation of large-area nanowire-based devices.
机译：用不同能量和注量的N +离子照射结晶的钛酸氢盐（H2Ti3O7）纳米线。扫描电子显微镜显示，在相对较低的注量下，纳米线弯曲并开始牢固地彼此粘附以及与硅基底粘附。在较高的通量下，纳米线显示出​​大规模的焊接并形成主要由“ X”和“ Y”结组成的网络。透射电子显微镜和拉曼散射研究证实了辐照后纳米线表面的高度非晶化。我们建议，尽管离子辐照引起的缺陷形成和悬空键可能导致纳米线之间发生化学键合，但大规模的纳米焊接和结网络的形成可以归因于由于热尖峰引起的局部表面熔化。我们的结果表明与能量密度的适当选择低能量离子照射可提供大面积的基于纳米线的装置的形成和操纵一个有吸引力的途径。

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