Graduate School of Enginnering, Nagoya University, Nagoya, 464-8603, Japan.
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, 277-8561, Japan.
Sci Rep. 2023 Apr 3;13(1):5450. doi: 10.1038/s41598-023-32621-5.
When tungsten (W) is deposited with helium (He) plasma (He-W co-deposition) on W surface, enhanced growth of fiberform nanostructure (fuzz) occurs, and sometimes it grows into large-scale fuzzy nanostructures (LFNs) thicker than 0.1 mm. In this study, different numbers of mesh opening (apertures) and W plates with nanotendril bundles (NTBs), which are tens of micrometers high nanofiber bundles, were used to investigate the condition for the origin of the LFN growth. It was found that the larger the mesh opening, the larger the area where LFNs are formed and the faster the formation tends to be. On NTB samples, it was found that NTBs grew significantly when exposed to He plasma with W deposition, especially when the size of the NTB reached [Formula: see text] mm. The concentration of the He flux due to the distortion of the shape of the ion sheath is proposed as one of the reasons to explain the experimental results.
当钨（W）与氦（He）等离子体（He-W 共沉积）沉积在 W 表面时，纤维状纳米结构（绒毛）的生长会增强，有时它会生长成厚度超过 0.1 毫米的大尺寸绒毛状纳米结构（LFNs）。在这项研究中，使用了不同数量的网孔（孔径）和具有纳米须丛（NTB）的 W 板，这些 NTB 是数十微米高的纳米纤维束，以研究 LFN 生长的起源条件。结果发现，网孔越大，形成 LFN 的区域越大，形成趋势越快。在 NTB 样品上，发现当暴露于具有 W 沉积的 He 等离子体时，NTB 会明显生长，特别是当 NTB 的尺寸达到[公式：见文本]毫米时。由于离子鞘形状的变形而导致的 He 通量浓度被提出作为解释实验结果的原因之一。
