Growth origin of large-scale fiberform nanostructures in He-W co-deposition environment

Kenta Hori; Shin Kajita; Rongshi Zhang; Hirohiko Tanaka; Noriyasu Ohno

doi:10.1038/s41598-023-32621-5

Growth origin of large-scale fiberform nanostructures in He-W co-deposition environment

Sci Rep. 2023 Apr 3;13(1):5450. doi: 10.1038/s41598-023-32621-5.

Authors

Kenta Hori¹, Shin Kajita^{2

3}, Rongshi Zhang¹, Hirohiko Tanaka^{1

4}, Noriyasu Ohno^{1

4}

Affiliations

¹ Graduate School of Enginnering, Nagoya University, Nagoya, 464-8603, Japan.
² Graduate School of Enginnering, Nagoya University, Nagoya, 464-8603, Japan. kajita@k.u-tokyo.ac.jp.
³ Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, 277-8561, Japan. kajita@k.u-tokyo.ac.jp.
⁴ Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya, 464-8603, Japan.

Abstract

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.

Abstract

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