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

K Hori, S Kajita, R Zhang, H Tanaka, N Ohno - Scientific Reports, 2023 - nature.com
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 …

Increased photoelectrochemical performance of vanadium oxide thin film by helium plasma treatment with auxiliary molybdenum deposition

S Kajita, T Eda, S Feng, H Tanaka… - Advanced Energy …, 2023 - Wiley Online Library
Helium (He) plasma treatment can be a versatile tool to fabricate nanostructures on a
surface and change the surface chemistry. Herein, vanadium (V) thin film is exposed to …

Low onset potential for oxygen evolution reaction on hematite electrodes processed with He plasma irradiation

S Kajita, A Bieberle-Hütter - International Journal of Hydrogen Energy, 2024 - Elsevier
In this study, we investigated the effects of helium (He) plasma irradiation and thermal
treatment on the morphology, the surface characteristics, and the photoelectrochemical …

Helium plasma irradiation on Nickel: Nanostructure formation and electrochemical characteristics

A Ranade, S Feng, S Kajita, MN Tsampas - Applied Surface Science, 2024 - Elsevier
Nanotechnology offers new avenues for the design, fabrication, and application of novel
materials. Helium plasma exposure is a technique that can be used to fabricate self …

Thermal conductivity measurement of fuzzy W using a thermoreflectance method

S Kajita, T Yagi, N Ohno - IEEE Transactions on Plasma …, 2024 - ieeexplore.ieee.org
Fuzzy nanostructured tungsten (W) is formed by helium (He) plasma irradiation. In fusion
devices, the thermophysical properties are important to consider the response to pulsed …

Plasma‐Driven Synthesis of Self‐Supported Nickel‐Iron Nanostructures for Water Electrolysis

A Ranade, M Lao, RHM Timmer… - Advanced Materials …, 2023 - Wiley Online Library
Nickel‐based electrocatalysts are deemed as promising low‐cost, earth‐abundant materials
in the development of the next‐generation alkaline and anion exchange membrane water …

Fabrication of tungsten-based optical diffuser using fiberform nanostructure via efficient plasma route

S Feng, H Natsume, S Kajita, E Li, R Yasuhara… - Optics …, 2023 - opg.optica.org
Optical diffusion is an essential process used to manage photons in a wide range of
photoelectric systems. This work proposes an approach to fabricate novel optical diffusers …

First-principles study of intrinsic defects and helium in tungsten trioxide

L Yang, BD Wirth - Journal of Applied Physics, 2024 - pubs.aip.org
Understanding the behavior of intrinsic defects and helium (He) in tungsten oxides is useful
for the application of tungsten (W) in a fusion environment because of the oxidation of W …

[HTML][HTML] Tungsten fuzz growth at low temperatures (< 900 K) on a surface with nanocones

Q Shi, S Kajita, N Ohno - Nuclear Materials and Energy, 2024 - Elsevier
The tungsten (W) fuzzy structure was widely observed in linear plasma devices under the
fusion-relevant condition. This type of structure can be used in many application fields …

Nanopatterning of Si surfaces by normal incident He plasma irradiation

Z Liu, L Li, Z Gao, Z Chen, C Yin, S Mao… - Applied Physics …, 2024 - pubs.aip.org
This study reports on the formation of self-organized silicon (Si) nanostructures by 75 eV
helium (He) plasma irradiation at normal incidence without the presence of impurities. In …