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Journal Articles

Revealing an origin of temperature-dependent structural change in intrinsically disordered proteins

Inoue, Rintaro*; Oda, Takashi; Nakagawa, Hiroshi; Tominaga, Taiki*; Ikegami, Takahisa*; Konuma, Tsuyoshi*; Iwase, Hiroki*; Kawakita, Yukinobu; Sato, Mamoru*; Sugiyama, Masaaki*

Biophysical Journal, 124(3), p.540 - 548, 2025/02

 Times Cited Count:0 Percentile:0.00(Biophysics)

Journal Articles

Cooling mechanism by barocaloric effect in plastic crystal

Li, B.*; Kawakita, Yukinobu

Kakushinteki Reikyaku Gijutsu; Mekanizumu Kara Soshi, Shisutemu Kaihatsu Made, p.19 - 28, 2024/01

no abstracts in English

Journal Articles

Local atomic structures and lattice dynamics of inverse colossal barocaloric ammonium thiocyanate

Zhang, Z.*; Gong, W.; Kawakita, Yukinobu; 9 of others*

Physical Review Materials (Internet), 7(12), p.125402_1 - 125402_9, 2023/12

 Times Cited Count:2 Percentile:20.33(Materials Science, Multidisciplinary)

Journal Articles

Colossal barocaloric plastic crystals

Lloveras, P.*; Zhang, Z.*; Zeng, M.*; Barrio, M.*; Kawakita, Yukinobu; Yu, D.*; Lin, S.*; Li, K.*; Moya, X.*; Tamarit, J.-L.*; et al.

Barocaloric Effects in the Solid State; Materials and methods, p.7_1 - 7_30, 2023/10

 Times Cited Count:232 Percentile:99.37(Multidisciplinary Sciences)

As Chapter 1 of the ebook entitled as "Barocaloric Effects in the Solid State", various plastic crystals (PC) showing colossal barocaloric (BC) effect are introduced. A method to determine the BC response in PCs, thermodynamic origin of BC effects, spectroscopic insights from quasi-elastic neutron scattering and application of PCs are explained.

Journal Articles

Direct observation of concentration fluctuations in Au-Si eutectic liquid by small-angle neutron scattering

Sakaguchi, Yoshifumi*; Takata, Shinichi; Kawakita, Yukinobu; Fujimura, Yuki; Kondo, Keietsu

Journal of Physics; Condensed Matter, 35(41), p.415403_1 - 415403_11, 2023/10

 Times Cited Count:0 Percentile:0.00(Physics, Condensed Matter)

Journal Articles

Differences in water dynamics between the hydrated chitin and hydrated chitosan determined by quasi-elastic neutron scattering

Hirota, Yuki*; Tominaga, Taiki*; Kawabata, Takashi*; Kawakita, Yukinobu; Matsuo, Yasumitsu*

Bioengineering (Internet), 10(5), p.622_1 - 622_17, 2023/05

 Times Cited Count:3 Percentile:38.63(Biotechnology & Applied Microbiology)

Journal Articles

Quasielastic neutron scattering probing H$$^{-}$$ dynamics in the H$$^{-}$$ conductors LaH$$_{3-2x}$$O$$_{x}$$

Tamatsukuri, Hiromu; Fukui, Keiga*; Iimura, Soshi*; Honda, Takashi*; Tada, Tomofumi*; Murakami, Yoichi*; Yamaura, Junichi*; Kuramoto, Yoshio*; Sagayama, Hajime*; Yamada, Takeshi*; et al.

Physical Review B, 107(18), p.184114_1 - 184114_8, 2023/05

 Times Cited Count:1 Percentile:12.23(Materials Science, Multidisciplinary)

Journal Articles

Short-range spin order in paramagnetic AgCrSe$$_{2}$$

Nakamura, Jumpei*; Kawakita, Yukinobu; Okabe, Hirotaka*; Li, B.*; Shimomura, Koichiro*; Suemasu, Takashi*

Journal of Physics and Chemistry of Solids, 175, p.111199_1 - 111199_8, 2023/04

 Times Cited Count:3 Percentile:22.06(Chemistry, Multidisciplinary)

Journal Articles

Hydrogen dynamics in hydrated chitosan by quasi-elastic neutron scattering

Hirota, Yuki*; Tominaga, Taiki*; Kawabata, Takashi*; Kawakita, Yukinobu; Matsuo, Yasumitsu*

Bioengineering (Internet), 9(10), p.599_1 - 599_17, 2022/10

 Times Cited Count:3 Percentile:22.64(Biotechnology & Applied Microbiology)

Journal Articles

Rotation of complex ions with ninefold hydrogen coordination studied by quasielastic neutron scattering and first-principles molecular dynamics calculations

Omasa, Yoshinori*; Takagi, Shigeyuki*; Toshima, Kento*; Yokoyama, Kaito*; Endo, Wataru*; Orimo, Shinichi*; Saito, Hiroyuki*; Yamada, Takeshi*; Kawakita, Yukinobu; Ikeda, Kazutaka*; et al.

Physical Review Research (Internet), 4(3), p.033215_1 - 033215_9, 2022/09

Journal Articles

Revealing the ion dynamics in Li$$_{10}$$GeP$$_{2}$$S$$_{12}$$ by quasi-elastic neutron scattering measurements

Hori, Satoshi*; Kanno, Ryoji*; Kwon, O.*; Kato, Yuki*; Yamada, Takeshi*; Matsuura, Masato*; Yonemura, Masao*; Kamiyama, Takashi*; Shibata, Kaoru; Kawakita, Yukinobu

Journal of Physical Chemistry C, 126(22), p.9518 - 9527, 2022/06

 Times Cited Count:12 Percentile:61.15(Chemistry, Physical)

Journal Articles

Cross-scale analysis of temperature compensation in the cyanobacterial circadian clock system

Furuike, Yoshihiko*; Ouyang, D.*; Tominaga, Taiki*; Matsuo, Tatsuhito*; Mukaiyama, Atsushi*; Kawakita, Yukinobu; Fujiwara, Satoru*; Akiyama, Shuji*

Communications Physics (Internet), 5(1), p.75_1 - 75_12, 2022/04

 Times Cited Count:7 Percentile:63.47(Physics, Multidisciplinary)

Journal Articles

Evaluation of sample cell materials for aqueous solutions used in quasi-elastic neutron scattering measurements

Tominaga, Taiki*; Sahara, Masae*; Kawakita, Yukinobu; Nakagawa, Hiroshi; Yamada, Takeshi*

Journal of Applied Crystallography, 54(6), p.1631 - 1640, 2021/12

 Times Cited Count:6 Percentile:57.51(Chemistry, Multidisciplinary)

Journal Articles

Hydrogen impurities in p-type semiconductors, GeS and GeTe

Nakamura, Jumpei*; Kawakita, Yukinobu; Shimomura, Koichiro*; Suemasu, Takashi*

Journal of Applied Physics, 130(19), p.195701_1 - 195701_7, 2021/11

 Times Cited Count:4 Percentile:23.69(Physics, Applied)

Journal Articles

Dynamics of water in a catalyst layer of a fuel cell by quasielastic neutron scattering

Ito, Kanae; Yamada, Takeshi*; Shinohara, Akihiro*; Takata, Shinichi; Kawakita, Yukinobu

Journal of Physical Chemistry C, 125(39), p.21645 - 21652, 2021/10

 Times Cited Count:9 Percentile:41.67(Chemistry, Physical)

Journal Articles

Microscopic dynamics of lithium diffusion in single crystal of the solid-state electrolyte La$$_{2/3-x}$$Li$$_{3x}$$TiO$$_{3}$$ (x = 0.13) studied by quasielastic neutron scattering

Matsuura, Masato*; Fujiwara, Yasuyuki*; Moriwake, Hiroki*; Ohara, Koji*; Kawakita, Yukinobu

Physical Review B, 104(9), p.094305_1 - 094305_7, 2021/09

 Times Cited Count:9 Percentile:46.19(Materials Science, Multidisciplinary)

Journal Articles

Conformational dynamics of a multidomain protein by neutron scattering and computational analysis

Nakagawa, Hiroshi; Saio, Tomohide*; Nagao, Michihiro*; Inoue, Rintaro*; Sugiyama, Masaaki*; Ajito, Satoshi; Tominaga, Taiki*; Kawakita, Yukinobu

Biophysical Journal, 120(16), p.3341 - 3354, 2021/08

 Times Cited Count:7 Percentile:43.91(Biophysics)

A multi-domain protein can have various conformations in solution. Interactions with other molecules result in the stabilization of one of the conformations and change in the domain dynamics. SAXS, a well-established experimental technique, can be employed to elucidate the conformation of a multi-domain protein in solution. NSE spectroscopy is a promising technique for recording the domain dynamics in nanosecond and nanometer scale. Despite the great efforts, there are still under development. Thus, we quantitatively removed the contribution of diffusion dynamics and hydrodynamic interactions from the NSE data via incoherent scattering, revealing the differences in the domain dynamics of the three functional states of a multi-domain protein, MurD. The differences among the three states can be explained by two domain modes.

Journal Articles

Local- and intermediate-range order in room temperature superionic conducting Ag-GeSe$$_{3}$$ glasses

Hosokawa, Shinya*; Kawakita, Yukinobu; Stellhorn, J. R.*; Pusztai, L.*; Blanc, N.*; Boudet, N.*; Ikeda, Kazutaka*; Otomo, Toshiya*

JPS Conference Proceedings (Internet), 33, p.011070_1 - 011070_7, 2021/03

BB2019-1957.pdf:3.47MB

Local- and intermediate-range atomic order in Ag ion conducting glasses Ag$$_{x}$$(GeSe$$_{3}$$)$$_{1-x}$$ with x = 0.15, 0.28, 0.33, and 0.50 were investigated by using a combination of AXS, XRD, ND, and RMC modeling. By adding the ND pdf to AXS and XRD results, reasonable partial structure factors and partial pdf were obtained by the RMC procedure. In contrast to the previous AXS and RMC study, a large number of Ag-Ge and Ge-Ge correlations are observed in the first coordination shell region, which is consistent with an ${it ab initio}$ MD simulation. The coordination numbers around the Ge and Se mostly follow the 8-$$N$$ rule over all Ag concentrations if Ag is not taken into account. With increasing the Ag concentration, the partial coordination numbers with Ge and Se atoms around Ag remarkably increases, while the Ag-Ag coordination number increases only slightly, indicating that the Ag conducting path is formed through the second neighboring Ag-Ag correlations.

Journal Articles

Corrosion of aluminum-based containers for neutron studies with aqueous samples under low temperatures

Tominaga, Taiki*; Sahara, Masae*; Kawakita, Yukinobu; Nakagawa, Hiroshi; Shimamoto, Naonobu*

JPS Conference Proceedings (Internet), 33, p.011094_1 - 011094_5, 2021/03

BB2019-2098.pdf:5.18MB

In quasielastic neutron scattering studies, aluminum or aluminum alloys are frequently employed as sample cells. With the increasing incident-neutron flux, the research area currently continues to expand; thus, obtaining data has become quicker than ever for dilute conditions. One such area is the water-containing systems. In this study, we investigated the effect of temperature on Al and found that even in a low temperature atmosphere, Al corrosion can occur. This was attributed to the different thermal expansion coefficients of Al as a base substrate and Al oxide as a passivating film.

Journal Articles

Mode distribution analysis for superionic melt of CuI by coherent quasielastic neutron scattering

Kawakita, Yukinobu; Kikuchi, Tatsuya*; Tahara, Shuta*; Nakamura, Mitsutaka; Inamura, Yasuhiro; Maruyama, Kenji*; Yamauchi, Yasuhiro*; Kawamura, Seiko; Nakajima, Kenji

JPS Conference Proceedings (Internet), 33, p.011071_1 - 011071_6, 2021/03

BB2019-1144.pdf:0.7MB

CuI is a well-known superionic conductor in a high temperature solid phase where the mobile cations migrate between interstitial sites in the f.c.c. sublattice formed by iodine ions. Even in the molten state, it shows several features suggesting collective or cooperative ionic motion. MD results show that Cu diffuses much faster than I. The Cu-Cu partial structure factor have a FSDP which indicates a medium-range ordering of Cu ions. Moreover the Cu-Cu partial pair distribution deeply penetrates into the nearest neighboring Cu-I shell. To reveal origin such anomalous behaviors of molten CuI, we performed quaiselastic neutron scattering (QENS) by the disk-chopper spectrometer AMATERAS at MLF, J-PARC. To interpret the total dynamic structure factor obtained from coherent QENS, the mode distribution analysis was applied. It is found that the motion of iodine is a kind of fluctuating within an almost local area while Cu ions diffuse much faster than iodine ions.

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