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Yamaguchi, Akiko; Kurihara, Yuichi*; Nagata, Kojiro*; Tanaka, Kazuya; Higaki, Shogo*; Kobayashi, Toru; Tanida, Hajime; Ohara, Yoshiyuki*; Yokoyama, Keiichi; Yaita, Tsuyoshi; et al.
Journal of Colloid and Interface Science, 661, p.317 - 332, 2024/05
Times Cited Count:4 Percentile:87.63(Chemistry, Physical)no abstracts in English
Tanida, Hajime
Advances in X-Ray Chemical Analysis, Japan, 55, p.145 - 152, 2024/03
In order to selectively observe the hydration structure of chemical species such as phosphorus, sulfur, and chlorine at the aqueous solution surface, we attempted to develop an X-ray absorption method using the surface sensitive electron yield method. In particular, we aimed to detect the concentration of chemical species at the surface in the presence of surfactants and their concentration and hydration structure changes. We developed a cell that can irradiate tender X-rays to the aqueous solution surface and detect electrons emitted from the surface, and tried measurements, but as a result, we could not successfully measure the surface. The development is recorded here.
Tsai, Y. H.*; Kobata, Masaaki; Fukuda, Tatsuo; Tanida, Hajime; Kobayashi, Toru; Yamashita, Yoshiyuki*
Applied Physics Letters, 124(11), p.112105_1 - 112105_5, 2024/03
Times Cited Count:1 Percentile:62.87(Physics, Applied)Yamaguchi, Akiko; Nagata, Kojiro*; Kobayashi, Keita; Tanaka, Kazuya; Kobayashi, Toru; Tanida, Hajime; Shimojo, Kojiro; Sekiguchi, Tetsuhiro; Kaneta, Yui; Matsuda, Shohei; et al.
iScience (Internet), 25(8), p.104763_1 - 104763_12, 2022/08
Times Cited Count:15 Percentile:71.11(Multidisciplinary Sciences)no abstracts in English
Yamaguchi, Akiko; Nagata, Kojiro*; Tanaka, Kazuya; Kobayashi, Keita; Kobayashi, Toru; Shimojo, Kojiro; Tanida, Hajime; Sekiguchi, Tetsuhiro; Kaneta, Yui; Matsuda, Shohei; et al.
Hosha Kagaku, (45), p.28 - 30, 2022/03
no abstracts in English
Tanida, Hajime; Tsuji, Takuya; Kobata, Masaaki
JAEA-Technology 2021-031, 25 Pages, 2022/02
In the decommissioning of the Tokyo Electric Power Company Holdings Fukushima Daiichi Nuclear Power Station, analysis of fuel debris to understand its characteristics is very important. The fuel debris removed for testing and analyzing will be fine particulates. Non-destructive analytical methods using X-rays are effective for such samples, but in order to apply them to fine particles, the X-rays must be focused to the micrometer order. For this purpose, the Kirkpatrick-Baez (KB) mirror was introduced. In this paper, we record the selection, specification, adjustment of the mirror, and write down the example of mapping of elements and evaluation of their valence by this mirror.
Tanida, Hajime; Okamoto, Yoshihiro
Advances in X-Ray Chemical Analysis, Japan, 52, p.69 - 80, 2021/03
In the two-dimensional imaging XAFS method using an X-ray CCD detector, a transmission method has been applied to heavy elements with absorption edges at relatively high energies. Although the transmission method requires the sample to be an optimal thickness, the high-energy X-rays have high transmission capability, and can be applied to relatively thick samples. In this study, we attempted to develop a fluorescence method for fast screening of transition metal elements with the low energy X-ray absorption edges and their valence distribution in the samples such as glass materials, which are difficult to make thin. In order to obtain XAFS spectra with high sensitivity and positional resolution, a direct imaging detector without a scintillator and a pinhole were used. The results were demonstrated with a highly brilliant synchrotron radiation undulator X-ray with variable incident energy.
Kumada, Takayuki; Oba, Yojiro; Motokawa, Ryuhei; Morooka, Satoshi; Tominaga, Aki; Tanida, Hajime; Shobu, Takahisa; Konno, Azusa; Owada, Kenji*; Ono, Naoko*; et al.
Journal of Nuclear Materials, 528, p.151890_1 - 151890_7, 2020/01
Times Cited Count:1 Percentile:9.57(Materials Science, Multidisciplinary)We have developed an anomalous small-angle X-ray scattering (ASAXS) diffractometer in SPring-8 to investigate irradiation-induced nanostructural change in ion-beam irradiated stainless steel. A thermally-aged MA956 stainless steel sample displays power-law scattering that follows the Porod law at the magnitude of scattering vector, Q, below 0.5 nm and an overlapped shoulder around 0.7 nm
. After the ion-beam irradiation, the intensity of the shoulder remained unchanged, whereas that of the power-law scattering nearly doubled. This result indicates that none of the structural parameters of the Cr-rich nanoprecipitates, such as the number density, size, and interface roughness, were changed by the irradiation.
Imai, Yosuke*; Tokiwa, Yuhei*; Ueno, Shusaku*; Tanida, Hajime; Watanabe, Iwao*; Matsubara, Hiroki*; Takiue, Takanori*; Aratono, Makoto*
Bulletin of the Chemical Society of Japan, 91(10), p.1487 - 1494, 2018/10
Times Cited Count:2 Percentile:7.42(Chemistry, Multidisciplinary)Competitive binding of binary mixed counterions to the headgroups of adsorbed surfactant films has been investigated at solution surfaces by total reflection X-ray absorption fine structure (XAFS) spectroscopy. The obtained extended XAFS spectra for bromide counterions are linear combinations of the spectra of fully hydrated bromide ions (free Br) and partially dehydrated bromide ions bound to the headgroups of the surfactant ions (bound Br). From the fraction of bound Br in counterion mixed systems, two series of the relative strengths of counterion binding are proposed for the trimethylammonium (TA
) and 3-methylimidazolium (MIM
) headgroups: (a) TA-SO
TA-Cl
TA-Br
TA-BF
and (b) MIM-Br
TA-Br
TA-BF
MIM-BF
. For the TA headgroup, matching the hydration of the headgroups and counterions gives series (a) according to Collins' law, which states that the tendency of contact ion pair formation becomes larger when the absolute values of the hydration enthalpies of the ions match. For the MIM headgroup, the number of binding sites of hydrogen bonds between the MIM headgroup and counterion is essential, which leads to series (b) because of competition between the counterion and water for interaction with the MIM headgroup.
Matsunaga, Toshiyuki*; Yamada, Noboru*; Kojima, Rie*; Shamoto, Shinichi; Sato, Masugu*; Tanida, Hajime*; Uruga, Tomoya*; Kohara, Shinji*; Takata, Masaki*; Zalden, P.*; et al.
Advanced Functional Materials, 21(12), p.2232 - 2239, 2011/06
Times Cited Count:121 Percentile:95.50(Chemistry, Multidisciplinary)Thermal properties of the amorphous and crystalline state of phase-change materials show remarkable differences such as higher thermal displacements and a more pronounced anharmonic behavior in the crystalline phase. These findings are related to the change of bonding upon crystallization.
Yoneda, Yasuhiro; Tanida, Hajime*; Takagaki, Masafumi*; Uruga, Tomoya*
Transactions of the Materials Research Society of Japan, 35(1), p.99 - 102, 2010/03
Depth dependency of local structure of SrTiO thin film was investigated by X-ray absorption fine structure (XAFS). In epitaxial thin films, a large strain exists between substrates and grown films. The expitaxial strain is the largest in the interface and it is relaxed as parting from the substrate. The lattice parameter of the grown film changes depending on the lattice strain. We performed depth-resolved XAFS measurements on SrTiO
thin film grown on LaAlO
substrate. The depth-resolved XAFS can extract the local structures around the surface and inner regions separately. It was clarified that the bond distance between Sr and O changed greatly depending on the depth. On the other hand, the bond distance between Sr and Ti unchanged.
Yoshii, Kenji; Ikeda, Naoshi*; Mori, Shigeo*; Yoneda, Yasuhiro; Mizumaki, Masaichiro*; Tanida, Hajime*; Kawamura, Naomi*
Transactions of the Materials Research Society of Japan, 32(1), p.51 - 54, 2007/03
Magnetic and dielectric properties of the ruthenium double perovskites RuO
were studied (
= Co, Ni, Zn, Mg). The materials with the magnetic M
ions (
= Co and Ni) showed magnetic ordering and large dielectric constants (about 5000). On the other hand, for the non-magnetic M
ions (
= Mg and Zn), magnetic ordering was not observed. In addition, their dielectric constants were found to be small (about 100-200). Together with the result of the dielectric response, the large dielectric constants for
=Co and Ni may be related to a smooth response of polar regions. Investigations of the properties of
RuO
with
=Pr and Nd are also being carried out, and their results are briefly discussed.
Shiwaku, Hideaki; Okamoto, Yoshihiro; Yaita, Tsuyoshi; Suzuki, Shinichi; Minato, Kazuo; Tanida, Hajime*
Zeitschrift fr Naturforschung, A, 60a(1-2), p.81 - 84, 2005/01
no abstracts in English
Okamoto, Yoshihiro; Shiwaku, Hideaki; Yaita, Tsuyoshi; Suzuki, Shinichi; Minato, Kazuo; Tanida, Hajime*
Zeitschrift fr Naturforschung, A, 59a(11), p.819 - 824, 2004/11
The local structure of molten CdCl and CdCl
-KCl mixture was investigated by high-temperature XAFS technique. The nearest Cd-Cl distance decreases by melting. Similarly, the coordination number decreases from 6 to 4. It suggests that there is (CdCl
)
tetrahedral complex ion in the melt. It is concluded that the local structure is kept also in the mixture melt, since the same XAFS result as the pure melt was obtained.
Yoshii, Kenji; Nakamura, Akio; Mizumaki, Masaichiro*; Tanida, Hajime*; Kawamura, Naomi*; Abe, Hideki*; Ishii, Yoshinobu; Shimojo, Yutaka; Morii, Yukio
Journal of Magnetism and Magnetic Materials, 272-276(Suppl.), p.e609 - e611, 2004/05
Times Cited Count:4 Percentile:24.48(Materials Science, Multidisciplinary)no abstracts in English
Mizumaki, Masaichiro*; Yoshii, Kenji; Kitazawa, Hideaki*; Tanida, Hajime*
Journal of Solid State Chemistry, 171(1-2), p.291 - 294, 2003/02
Times Cited Count:5 Percentile:17.26(Chemistry, Inorganic & Nuclear)no abstracts in English
Yoshii, Kenji; Abe, Hideki*; Mizumaki, Masaichiro*; Tanida, Hajime*; Kawamura, Naomi*
Journal of Alloys and Compounds, 348(1-2), p.236 - 240, 2003/01
Times Cited Count:16 Percentile:63.16(Chemistry, Physical)no abstracts in English
Okamoto, Yoshihiro; Shiwaku, Hideaki; Yaita, Tsuyoshi; Narita, Hirokazu; Tanida, Hajime*
Journal of Molecular Structure, 641(1), p.71 - 76, 2002/10
Times Cited Count:43 Percentile:71.42(Chemistry, Physical)The local structure of molten LaCl was investigated by X-ray absorption fine structure(XAFS) of the La K-edge. The nearest La
-Cl
distance andcoordination number were 2.89
and 7.4
from the curve fitting of the 1st peak in the fourier transform magnitude
. The coordination number larger than 6 suggests that the local structure of molten LaCl
is not a simple octahedral coordination (LaCl
)
, but 7-fold (LaCl
)
and/or 8-fold (LaCl
)
complexes. The 1st La
-La
distance, of which correlation was observed as a weak 2nd peak in the
, was evaluated to be 4.9
. It suggests that the distorted corner-sharing connection of the complex species is predominant in the melt, inontrast with molten YCl
in which the edge-sharing connection of the 6-fold (YCl
)
mainly exists.
Uruga, Tomoya*; Tanida, Hajime*; Yoneda, Yasuhiro; Takeshita, K.*; Goto, Shunji*; Ishikawa, Tetsuya*
Nuclear Instruments and Methods in Physics Research A, 467-468(Part1), p.782 - 784, 2001/07
Times Cited Count:9 Percentile:55.45(Instruments & Instrumentation)no abstracts in English
Narita, Hirokazu; Yaita, Tsuyoshi; Okamoto, Yoshihiro; Takai, Konomi; Shiwaku, Hideaki; Shimada, Asako*; Yamamoto, Takeshi*; Tanida, Hajime*
Spring-8 Experiment Report, Vol.6, P. 9, 2001/00
no abstracts in English