User profiles for A. Hirata

Akihiko Hirata

- Verified email at aoni.waseda.jp - Cited by 19806

Akimasa Hirata

- Verified email at nitech.ac.jp - Cited by 10673

Assessment of human exposure to electromagnetic fields: Review and future directions

A Hirata, Y Diao, T Onishi, K Sasaki… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
This article reviews recent standardization activities and scientific studies related to the
assessment of human exposure to electromagnetic fields (EMF). The differences of human …

CVD diamond—Research, applications, and challenges

RJ Nemanich, JA Carlisle, A Hirata, K Haenen - Mrs Bulletin, 2014 - cambridge.org
Diamond is a unique material that often exhibits extreme properties compared to other
materials. Discovered about 30 years ago, the use of hydrogen in plasma-enhanced chemical …

[HTML][HTML] Properties and classification of diamond-like carbon films

…, K Kanda, H Akasaka, M Tsujioka, K Hirakuri, A Hirata… - Materials, 2021 - mdpi.com
Diamond-like carbon (DLC) films have been extensively applied in industries owing to their
excellent characteristics such as high hardness. In particular, there is a growing demand for …

Atomic structure of nanoclusters in oxide-dispersion-strengthened steels

A Hirata, T Fujita, YR Wen, JH Schneibel, CT Liu… - Nature materials, 2011 - nature.com
Oxide-dispersion-strengthened steels are the most promising structural materials for next-generation
nuclear energy systems because of their excellent resistance to both irradiation …

Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors

X Lang, A Hirata, T Fujita, M Chen - Nature nanotechnology, 2011 - nature.com
Electrochemical supercapacitors can deliver high levels of electrical power and offer long
operating lifetimes 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , but their energy storage density is too low for many …

Geometric frustration of icosahedron in metallic glasses

A Hirata, LJ Kang, T Fujita, B Klumov, K Matsue… - Science, 2013 - science.org
Icosahedral order has been suggested as the prevalent atomic motif of supercooled liquids
and metallic glasses for more than half a century, because the icosahedron is highly close-…

Direct observation of local atomic order in a metallic glass

A Hirata, P Guan, T Fujita, Y Hirotsu, A Inoue… - Nature materials, 2011 - nature.com
The determination of the atomic configuration of metallic glasses is a long-standing problem
in materials science and solid-state physics 1 , 2 . So far, only average structural information …

Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation

…, H Chen, M Yao, B Gault, D Ponge, D Raabe, A Hirata… - Nature, 2017 - nature.com
Next-generation high-performance structural materials are required for lightweight design
strategies and advanced energy applications. Maraging steels, combining a martensite matrix …

Nanoporous graphene with single‐atom nickel dopants: an efficient and stable catalyst for electrochemical hydrogen production

…, Y Ito, W Cong, Y Tan, P Liu, A Hirata… - Angewandte Chemie …, 2015 - Wiley Online Library
Single‐atom nickel dopants anchored to three‐dimensional nanoporous graphene can be
used as catalysts of the hydrogen evolution reaction (HER) in acidic solutions. In contrast to …

Atomic origins of the high catalytic activity of nanoporous gold

T Fujita, P Guan, K McKenna, X Lang, A Hirata… - Nature materials, 2012 - nature.com
Distinct from inert bulk gold, nanoparticulate gold has been found to possess remarkable
catalytic activity towards oxidation reactions. The catalytic performance of nanoparticulate gold …