Zobrazeno 1 - 10
of 707
pro vyhledávání: '"Akihiko, Hirata"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract In disordered glass structures, the structural modelling and analyses based on local experimental data are not yet established. Here we investigate the icosahedral short-range order (SRO) in a Zr–Pt metallic glass using local structural mo
Externí odkaz:
https://doaj.org/article/d536ac6237e8417d8df05f7c5c31dfe3
Publikováno v:
NPG Asia Materials, Vol 16, Iss 1, Pp 1-10 (2024)
Abstract The intermediate-range order of covalently bonded glasses has been extensively studied in terms of their diffraction peaks observed at low scattering angles; these peaks are called the first sharp diffraction peaks (FSDPs). Although the atom
Externí odkaz:
https://doaj.org/article/47913bda66b3420aaa81c6fdc390e9c5
Ring-originated anisotropy of local structural ordering in amorphous and crystalline silicon dioxide
Publikováno v:
Communications Materials, Vol 4, Iss 1, Pp 1-14 (2023)
Abstract Rings comprising chemically bonded atoms are essential topological motifs for the structural ordering of network-forming materials. Quantification of such larger motifs beyond short-range pair correlation is essential for understanding the l
Externí odkaz:
https://doaj.org/article/c98e9853da914d4d91d7f88c4d7ed244
Autor:
Yusuke Tanaka, Guillaume Ducournau, Cybelle Belem-Goncalves, Frederic Gianesello, Cyril Luxey, Issei Watanabe, Akihiko Hirata, Norihiko Sekine, Akifumi Kasamatsu, Shintaro Hisatake
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 24-31 (2022)
In this study, photonics-based near-field measurement and far-field characterization in a 300-GHz band are demonstrated using an electrooptic (EO) sensor with planar scanning. The field to be measured is up-converted to the optical domain (1550 nm) a
Externí odkaz:
https://doaj.org/article/c8dbf5f5faf74fba9cbc13498e786dd5
Autor:
Shinji Kohara, Motoki Shiga, Yohei Onodera, Hirokazu Masai, Akihiko Hirata, Motohiko Murakami, Tetsuya Morishita, Koji Kimura, Kouichi Hayashi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Abstract The network topology in disordered materials is an important structural descriptor for understanding the nature of disorder that is usually hidden in pairwise correlations. Here, we compare the covalent network topology of liquid and solidif
Externí odkaz:
https://doaj.org/article/85a1e24fbce84eaa894e551addab5c25
Autor:
Shinya Kudo, Akihiko Hirata
Publikováno v:
Materials Transactions; 2024, Vol. 65 Issue 7, p723-727, 5p
Autor:
Akihiko Hirata
Publikováno v:
Quantum Beam Science, Vol 6, Iss 4, p 28 (2022)
To analyze amorphous structure models obtained by a molecular dynamics (or reverse Monte Carlo) simulation, we propose a virtual angstrom-beam electron diffraction analysis. In this analysis, local electron diffraction patterns are calculated for the
Externí odkaz:
https://doaj.org/article/2ba3038a34cb4295a79c66b4e1ecb99a
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
The coarsening of amorphous metallic nanoparticles remains poorly understood. Here, the authors combine high resolution microscopy and atomistic simulations to show the disordered structure of amorphous nanoparticles makes them coarsen faster than cr
Externí odkaz:
https://doaj.org/article/2ec9c015de154013a26bf0a2f6aaa3f6
Autor:
Kemeng Ji, Jiuhui Han, Akihiko Hirata, Takeshi Fujita, Yuhao Shen, Shoucong Ning, Pan Liu, Hamzeh Kashani, Yuan Tian, Yoshikazu Ito, Jun-ichi Fujita, Yutaka Oyama
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
The mechanism of lithium storage in graphenic carbon remains a fundamental question to be addressed. Here the authors employ suitable bilayer graphene foam to investigate various physiochemical phenomena of lithium intercalation and propose a storage
Externí odkaz:
https://doaj.org/article/ed5fc2b430914088be91169e5f5d7fc5
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
Directly relating the mechanical properties of metallic glasses to their atomic structure remains a challenge. Here, the authors use high resolution microscopy to show many mechanical properties of metallic glasses depend on a single structural param
Externí odkaz:
https://doaj.org/article/49b4ac6a5b564ed98578496ece4db13b