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Journal Articles

Nacre-like MXene/polyacrylic acid layer-by-layer multilayers as hydrogen gas barriers

Auh, Y. H.*; Neal, N. N.*; Arole, K.*; Regis, N. A.*; Nguyen, T.*; Ogawa, Shuichi*; Tsuda, Yasutaka; Yoshigoe, Akitaka; Radovic, M.*; Green, M. J.*; et al.

ACS Applied Materials & Interfaces, 17(21), p.31392 - 31402, 2025/05

Journal Articles

Crystal structures and phase stability of antiferroelectric $$R$$ phases in undoped and Ca-modified sodium niobates

Aso, Seiyu*; Matsuo, Hiroki*; Yoneda, Yasuhiro; Morikawa, Daisuke*; Tsuda, Kenji*; Oyama, Kenji*; Ishigaki, Toru*; Noguchi, Yuji*

Physical Review B, 111(17), p.174114_1 - 174114_12, 2025/05

We investigate the crystal structures, phase transitions, and phase stability of undoped and Ca-modified NaNbO$$_{3}$$ through a combined analysis of high-resolution synchrotron radiation X-ray and neutron diffraction, convergent-beam electron diffraction, and density functional theory (DFT) calculations. It is demonstrated that the antiferroelectric (AFE)-$$R$$ phase is stabilized over a wide temperature range of 200 to 800 K by Ca modification, and that the NaNbO$$_3$$ is stabilized by temperature-driven isostatic pressure accompanied by lattice expansion, whereas the Ca-modified NaNbO$$_3$$ is induced by composition-induced chemical pressure along with lattice shrinkage.

Journal Articles

Electrocatalytic nitrous oxide reduction reaction at Sn-modified Pd-Pt single crystalline electrodes in acidic media

Kato, Masaru*; Zheng, J.*; Deng, Y.*; Saito, Fumie*; Unuma, Yuki*; Oka, Sayuki*; Tamura, Kazuhisa; Yagi, Ichizo*

ACS Catalysis, 15(10), p.7710 - 7719, 2025/04

 Times Cited Count:0

Journal Articles

Bayesian estimation analysis of X-ray photoelectron spectra; Application to Si 2p spectrum analysis of oxidized silicon surfaces

Shinotsuka, Hiroshi*; Nagata, Kenji*; Yoshikawa, Hideki*; Ogawa, Shuichi*; Yoshigoe, Akitaka

Applied Surface Science, 685, p.162001_1 - 162001_11, 2025/03

 Times Cited Count:1 Percentile:0.00(Chemistry, Physical)

Silicon (Si) 2p photoelectron spectra of thermally oxidized Si(001) surfaces were analyzed using Bayesian estimation, a type of mathematical statistical processing, considering spin-orbit interactions. The accuracy of the estimation of fitting parameters and the model selection of the number of peaks were discussed. The spectral analysis was performed without any prior information on the positions of other Si peaks, except for the prominent bulk Si peak, and without using chemical-state assumptions. Our method completely verified previous findings on the surface species and the changes in peaks due to oxidation-induced strain as oxidation progressed.

Journal Articles

Strain analysis of thermoelectric materials using high-resolution synchrotron X-ray diffraction data

Nakasawa, Hayato*; Shobu, Takahisa; Tominaga, Aki; Fujii, Masashi*; Matsumoto, Hironari*; Matsuda, Michiko*; Shimada, Takeshi*; Trivedi, V.*; Tachibana, Makoto*; Tsujii, Naohito*; et al.

Funtai Oyobi Fummatsu Yakin, 72(Suppl.), p.S997 - S1001, 2025/03

Journal Articles

Direct measurement of lattice behavior during femtosecond laser-driven shock front formation in copper

Egashira, Naoya*; Matsuda, Tomoki*; Okuchi, Takuo*; Seto, Yusuke*; Ito, Yusuke*; Shobu, Takahisa; Nakanii, Nobuhiko*; Sano, Tomokazu*; 4 of others*

Journal of Applied Physics, 137(10), p.105903_1 - 105903_8, 2025/03

 Times Cited Count:1 Percentile:0.00(Physics, Applied)

Journal Articles

Stress and plastic strain partitioning behaviors and those contributions to martensitic transformation of retained austenite in medium manganese and transformation-induced plasticity-aided bainitic ferrite steels

Hojo, Tomohiko*; Koyama, Motomichi*; Kumai, Bakuya*; Zhou, Y.*; Shibayama, Yuki; Shiro, Ayumi*; Shobu, Takahisa; Saito, Hiroyuki*; Ajita, Saya*; Akiyama, Eiji*

ISIJ International, 65(2), p.284 - 296, 2025/02

Journal Articles

None

Nankawa, Takuya

Isotope News, (797), p.16 - 17, 2025/02

no abstracts in English

Journal Articles

Dissolution behavior of U$$_{3}$$O$$_{8}$$, FeUO$$_{4}$$, and UO$$_{2}$$-Zr-stainless steel system samples generated in an oxidative atmosphere in the presence of malonic acid

Tonna, Ryutaro*; Sasaki, Takayuki*; Okamoto, Yoshihiro; Kobayashi, Taishi*

Journal of Nuclear Materials, 605, p.155561_1 - 155561_9, 2025/02

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Synchrotron radiation photoemission electron microscopy study on radioactive cesium-bearing microparticle collected in Fukushima

Yoshigoe, Akitaka; Tsuda, Yasutaka; Kobata, Masaaki; Okane, Tetsuo; Satou, Yukihiko; Okochi, Takuo*

e-Journal of Surface Science and Nanotechnology (Internet), 23(1), p.16 - 21, 2025/02

Journal Articles

Application of High-Energy-Resolution X-ray Absorption Spectroscopy to actinide chemistry; A Case study of assessing U(V) electronic structure in FeUO$$_{4}$$

Yomogida, Takumi

Hoshako, 38(1), p.19 - 25, 2025/01

High-energy-resolution fluorescence detection-X-ray absorption near-edge structure (HERFD-XANES) spectroscopy has enabled us to discuss the electronic structure of actinide compounds in more detail than with conventional XANES spectroscopy. We are conducting research with the aim of contributing to the prediction of the migration behavior of trace actinide elements in the environment by performing actinide speciation in various environmental samples. In this paper, we introduce the content of the discussion of the electronic state of U from the perspective of basic science, which is important for advancing application of HERFD-XANES spectroscopy to environmental science.

Journal Articles

Synthesis of carbon nanowalls using plasma-irradiated solid carbon and absorption of Cs in water

Fukada, Yukimasa; Aoyagi, Yumito*; Yokoyama, Misaki*; Horibe, Yoichi*; Kano, Jun*; Kaneda, Miyu*; Fujii, Tatsuo*; Yoshigoe, Akitaka; Kobata, Masaaki; Fukuda, Tatsuo; et al.

Journal of Electronic Materials, 54, p.686 - 692, 2025/01

 Times Cited Count:0 Percentile:0.00(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Investigation of microscopic structures in black lacquer using quantum beams

Nankawa, Takuya

Shikizai Kyokai-Shi, 98(1), p.2 - 6, 2025/01

The use of lacquer in Japan has a very long history dating back to the Jomon period. Lacquer painting is known for its beautiful colors and superior resistance to chemicals and seawater compared to today's petroleum products. Despite these excellent properties, it is very difficult to measure the structure of lacquer films, which cause the excellent physical properties and few people have investigated about it. In this study, we focused on the interactions between urushiol in raw lacquer and black lacquer and by using quantum beams, and we analyzed the nano-structure in raw lacquer and black lacquer, which is responsible for the color difference.

Journal Articles

$$^{149}$$Sm synchrotron-radiation-based M$"{o}$ssbauer and $$mu^+$$SR studies of Sm$$_3$$Ru$$_4$$Ge$$_{13}$$

Tsutsui, Satoshi; Ito, Takashi; Nakamura, Jin*; Yoshida, Mio*; Kobayashi, Yoshio*; Yoda, Yoshitaka*; Nakamura, Jumpei*; Koda, Akihiro*; Higashinaka, Ryuji*; Aoki, Dai*; et al.

Interactions (Internet), 245(1), p.55_1 - 55_9, 2024/12

Journal Articles

$$^{149}$$Sm synchrotron-radiation-based M$"{o}$ssbauer spectroscopy of Sm-based heavy fermion compounds

Tsutsui, Satoshi; Higashinaka, Ryuji*; Mizumaki, Masaichiro*; Kobayashi, Yoshio*; Nakamura, Jin*; Ito, Takashi; Yoda, Yoshitaka*; Matsuda, Tatsuma*; Aoki, Yuji*; Sato, Hideyuki*

Interactions (Internet), 245(1), p.9_1 - 9_10, 2024/12

Journal Articles

Dissolution behavior of calcium uranate under oxidizing and reducing conditions

Kato, Yuto*; Sasaki, Takayuki*; Tonna, Ryutaro*; Kobayashi, Taishi*; Okamoto, Yoshihiro

Applied Geochemistry, 175, p.106196_1 - 106196_9, 2024/11

 Times Cited Count:1 Percentile:0.00(Geochemistry & Geophysics)

Journal Articles

Dissociative adsorption of supersonic CH$$_{3}$$Cl on Cu oxide Surfaces; Cu$$_{2}$$O(111) and bulk Cu$$_{2}$$O precursor "29"; Structure on Cu(111)

Hayashida, Koki*; Tsuda, Yasutaka; Murase, Natsumi*; Yamada, Takashi*; Yoshigoe, Akitaka; Di$~n$o, W. A.*; Okada, Michio*

Applied Surface Science, 669, p.160475_1 - 160475_6, 2024/10

 Times Cited Count:0 Percentile:0.00(Chemistry, Physical)

Journal Articles

None

Kamiya, Junichiro

CROSS T&T, (78), p.38 - 41, 2024/10

no abstracts in English

Journal Articles

Dissolution of zirconium-cerium oxide solid solution in an aqueous system

Kobayashi, Taishi*; Sato, Yutaro*; Tonna, Ryutaro*; Matsumura, Daiju; Sasaki, Takayuki*; Ikeda, Atsushi

Dalton Transactions (Internet), 53(46), p.18616 - 18628, 2024/10

 Times Cited Count:0 Percentile:0.00(Chemistry, Inorganic & Nuclear)

Journal Articles

Electron transfer capability in atomic hydrogen reactions for imidazole groups bound to the insulating alkanethiolate layer on Au(111)

Kato, Hiroyuki S.*; Muroyama, Mizuho*; Kobayakawa, Nano*; Muneyasu, Riku*; Tsuda, Yasutaka; Murase, Natsumi*; Watanabe, Seiya*; Yamada, Takashi*; Kanematsu, Yusuke*; Tachikawa, Masanori*; et al.

Journal of Physical Chemistry Letters (Internet), 15(43), p.10769 - 10776, 2024/10

 Times Cited Count:1 Percentile:42.16(Chemistry, Physical)

3255 (Records 1-20 displayed on this page)