Flowing behavior into, within and out of individual rolled-up semiconductor nanotubes

流体材料(特别是染料)将通过毛细压力填充到单独卷起的半导体纳米管中，并将使用高速视频显微镜和单管光谱分析来监测填充机制。为了获得系统的实验数据，通过可控地调节卷起层的厚度和固有应变，将单个管子的直径从10 nm变化到1000 nm。此外，纳米管壁的厚度和弹性将通过层卷曲的数量进行精确调整。我们打算用聚焦的激光束加热填充的纳米管的局部部分，这将导致纳米管体内流体材料的突然膨胀。由此产生的纳米管喷雾行为将以毫秒级的时间分辨率作为管径和壁厚的函数进行研究。在介观尺寸范围内，对位置良好的单个纳米管的几何和结构性质的无与伦比的控制打开了一个独特的机会，将系统的实验数据与纳米流动性领域的现有理论模型进行比较。

Fluid materials (in particular dyes) will be filled into individual rolled-up semiconductor nanotubes by capillary pressure and the filling mechanism will be monitored applying high speed video microscopy and single tube spectroscopy. In order to obtain systematic experimental data the diameter of individual tubes will be varied from 10 to 1000 nm by controllably adjusting the thickness and inherent strain of the rolled up layers. Furthermore, the wall thickness and therefore the elasticity of the nanotube walls will be precisely tuned by the number of layer convolutions. We intend to heat local parts of a filled nanotube with a focused laser beam, which will cause an abrupt expansion of the fluid material within the nanotube body. The resulting spraying behavior out of the nanotube will be studied as a function of tube diameter and wall thickness with millisecond time resolution. The unrivalled control over the geometric and structural properties of well-positioned individual nanotubes in the mesoscopic size region opens a unique opportunity to compare systematic experimental data to existing theoretical models in the field of nanofluidity.