JOPSS - Search Results

Journal Articles

High-temperature gaseous reaction of cesium with siliceous thermal insulation; The Potential implication to the provenance of enigmatic Fukushima cesium-bearing material

Rizaal, M.; Nakajima, Kunihisa; Saito, Takumi*; Osaka, Masahiko; Okamoto, Koji*

ACS Omega (Internet), 7(33), p.29326 - 29336, 2022/08

https://doi.org/10.1021/acsomega.2c03525

Times Cited Count：3 Percentile：27.64(Chemistry, Multidisciplinary)

Journal Articles

Revaporization behavior of cesium and iodine compounds from their deposits in the steam-boron atmosphere

Rizaal, M.; Miwa, Shuhei; Suzuki, Eriko; Imoto, Jumpei; Osaka, Masahiko; Goullo, M.*

ACS Omega (Internet), 6(48), p.32695 - 32708, 2021/12

https://doi.org/10.1021/acsomega.1c04441

Times Cited Count：1 Percentile：6.39(Chemistry, Multidisciplinary)

Journal Articles

Optimizing TiO through water-soluble Ti complexes as raw material for controlling particle size and distribution of synthesized BaTiO nanocubes

Nakashima, Koichi*; Hironaka, Kota*; Ouchi, Kazuma*; Ajioka, Mao*; Kobayashi, Yoshio*; Yoneda, Yasuhiro; Yin, S.*; Kakihana, Masato*; Sekino, Toru*

ACS Omega (Internet), 6(48), p.32517 - 32527, 2021/12

https://doi.org/10.1021/acsomega.1c04013

Times Cited Count：5 Percentile：36.83(Chemistry, Multidisciplinary)

The BaTiO nanoparticles synthesized by the hydrothermal method is examined by synchrotron X-ray and TEM observation. It was found that the particle size of synthesized BaTiO depends on the particle size of the raw material of TiO. Succeeded in synthesizing 100 nm size BaTiO nanocrystals showing uniform particle size distribution using TiO nanoparticles with optimized particle size. The obtained BaTiO nanocrystal is a tetragonal system of ferroelectric phase. A three-dimensional structure of BaTiO nanoparticles could be obtained by the electron beam tomography.

Journal Articles

Revisit of XPS studies of supersonic O $_{2}$ molecular adsorption on Cu(111); Copper oxides

Hayashida, Koki*; Tsuda, Yasutaka; Yamada, Takashi*; Yoshigoe, Akitaka; Okada, Michio*

ACS Omega (Internet), 6(40), p.26814 - 26820, 2021/10

https://doi.org/10.1021/acsomega.1c04663

Times Cited Count：7 Percentile：48.92(Chemistry, Multidisciplinary)

We report the X-ray photoemission spectroscopy (XPS) characterization of the bulk Cu $_{2}$ O(111) surface and 8-type and 29-type oxide structures on Cu(111) prepared by using 0.5 eV O $_{2}$ supersonic molecular beam (SSMB) source. We propose a new structural model for the 8-type oxide structure and also confirmed the previously proposed model for the [29] oxide structure on Cu(111), based on the O1s XPS spectra. The detection-angle dependence of the O 1s spectra supports that the nanopyramidal model is more preferable for the (X)R30 $^{circ}$ Cu $_{2}$ O(111). We also report the electronic excitations which O1s electrons suffer.

Journal Articles

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometry with oxygen dynamic reaction for quantification of technetium-99

Matsueda, Makoto; Yanagisawa, Kayo*; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Abe, Hironobu; Kitamura, Akihiro; Takagai, Yoshitaka*

ACS Omega (Internet), 6(29), p.19281 - 19290, 2021/07

https://doi.org/10.1021/acsomega.1c02756

Times Cited Count：2 Percentile：14.19(Chemistry, Multidisciplinary)

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometry with oxygen dynamic reaction cell (online SPE-ICP-MS-DRC) was shown to be a thorough automatic analytical system, circumventing the need for human handling. At three stepwise separations (SPE-DRC-Q mass filters), we showed that interference materials allowed the coexistence of abundance ratios of 1.510 $^{-13}$ for $^{99}$ Tc/Mo. Using this optimized system, a detection limit of $^{99}$ Tc was 9.3 pg/L (5.9 mBq/L) for a 50 mL injection and sequential measurements were undertaken at a cycle of 24 min/sample.

Journal Articles

Distinguishing adsorbed and deposited ionomers in the catalyst layer of polymer electrolyte fuel cells using contrast-variation small-angle neutron scattering

Harada, Masashi*; Takata, Shinichi; Iwase, Hiroki*; Kajiya, Shuji*; Kadoura, Hiroaki*; Kanaya, Toshiji*

ACS Omega (Internet), 6(23), p.15257 - 15263, 2021/06

https://doi.org/10.1021/acsomega.1c01535

Times Cited Count：19 Percentile：77.12(Chemistry, Multidisciplinary)

Journal Articles

Stabilization of size-controlled BaTiO nanocubes via precise solvothermal crystal growth and their anomalous surface compositional reconstruction

Nakashima, Koichi*; Onagi, Kaito*; Kobayashi, Yoshio*; Ishigaki, Toru*; Ishikawa, Yoshihisa*; Yoneda, Yasuhiro; Yin, S.*; Kakihana, Masato*; Sekino, Toru*

ACS Omega (Internet), 6(14), p.9410 - 9425, 2021/04

https://doi.org/10.1021/acsomega.0c05878

Times Cited Count：9 Percentile：58.45(Chemistry, Multidisciplinary)

We succeeded in synthesizing barium titanate nanocubes by hydrothermal synthesis. When the nanocubes were examined in detail using a scanning electron microscope, pulsed neutrons, and large synchrotron radiation, it was found that a reconstituted layer of titanium oxide was formed on the surface.

Journal Articles

Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ single crystals

Utsumi, Shigenori*; Tanaka, Seiya*; Maruyama, Kenichi*; Amako, Yasushi*; Kiyanagi, Ryoji; Nakao, Akiko*; Moriyama, Kentaro*; Ishikawa, Yoshihisa*; 9 of others*

ACS Omega (Internet), 5(38), p.24890 - 24897, 2020/09

https://doi.org/10.1021/acsomega.0c03671

Times Cited Count：4 Percentile：20.61(Chemistry, Multidisciplinary)

Fabricating large, high-crystalline-quality single-crystal samples of hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ is the first important step to elucidating its helimagnetic structure and developing it for further applications. In this study, single crystals of Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ of various Sc concentrations were successfully grown by the spontaneous crystallization method using Na $_{2}$ O-Fe $_{2}$ O $_{3}$ flux. X-ray diffraction and elemental analysis revealed that the obtained crystals were composed of single-phase Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ of high crystalline quality. The temperature dependence of magnetization and the magnetization curves at 77 K of the = 0.128 crystal exhibited behavior characteristics of helimagnetism. Neutron diffraction measurements of the = 0.128 crystal exhibited magnetic satellite reflection peaks below 211K, proving evidence that Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ behaves as a helimagnetic material.

Journal Articles

Spectroscopic studies of Mssbauer, infrared, and laser-induced luminescence for classifying rare-earth minerals enriched in iron-rich deposits

Aoyagi, Noboru; Nguyen, T. T.*; Kumagai, Yuta; Nguyen, T. V.*; Nakada, Masami; Segawa, Yukari; Nguyen, H. T.*; Le, B. T.*

ACS Omega (Internet), 5(13), p.7096 - 7105, 2020/04

https://doi.org/10.1021/acsomega.9b03247

Times Cited Count：3 Percentile：15.14(Chemistry, Multidisciplinary)

Journal Articles

Proposed cesium-free mineralization method for soil decontamination; Demonstration of cesium removal from weathered biotite

Honda, Mitsunori; Shimoyama, Iwao; Kogure, Toshihiro*; Baba, Yuji; Suzuki, Shinichi; Yaita, Tsuyoshi

ACS Omega (Internet), 2(12), p.8678 - 8681, 2017/12

https://doi.org/10.1021/acsomega.7b01304

Times Cited Count：7 Percentile：26.29(Chemistry, Multidisciplinary)

Journal Articles

Mechanism of Cs removal from Fukushima weathered biotite by heat treatment with a NaCl-CaCl $_{2}$ mixed salt

Honda, Mitsunori; Okamoto, Yoshihiro; Shimoyama, Iwao; Shiwaku, Hideaki; Suzuki, Shinichi; Yaita, Tsuyoshi

ACS Omega (Internet), 2(2), p.721 - 727, 2017/02

https://doi.org/10.1021/acsomega.6b00372

Times Cited Count：19 Percentile：54.92(Chemistry, Multidisciplinary)

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High-temperature gaseous reaction of cesium with siliceous thermal insulation; The Potential implication to the provenance of enigmatic Fukushima cesium-bearing material

Revaporization behavior of cesium and iodine compounds from their deposits in the steam-boron atmosphere

Optimizing TiO through water-soluble Ti complexes as raw material for controlling particle size and distribution of synthesized BaTiO nanocubes

Revisit of XPS studies of supersonic O $_{2}$ molecular adsorption on Cu(111); Copper oxides

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometry with oxygen dynamic reaction for quantification of technetium-99

Distinguishing adsorbed and deposited ionomers in the catalyst layer of polymer electrolyte fuel cells using contrast-variation small-angle neutron scattering

Stabilization of size-controlled BaTiO nanocubes via precise solvothermal crystal growth and their anomalous surface compositional reconstruction

Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ single crystals

Spectroscopic studies of Mssbauer, infrared, and laser-induced luminescence for classifying rare-earth minerals enriched in iron-rich deposits

Proposed cesium-free mineralization method for soil decontamination; Demonstration of cesium removal from weathered biotite

Mechanism of Cs removal from Fukushima weathered biotite by heat treatment with a NaCl-CaCl $_{2}$ mixed salt