26
|
Miura A, Bartel CJ, Goto Y, Mizuguchi Y, Moriyoshi C, Kuroiwa Y, Wang Y, Yaguchi T, Shirai M, Nagao M, Rosero-Navarro NC, Tadanaga K, Ceder G, Sun W. Observing and Modeling the Sequential Pairwise Reactions that Drive Solid-State Ceramic Synthesis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100312. [PMID: 33949743 DOI: 10.1002/adma.202100312] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Solid-state synthesis from powder precursors is the primary processing route to advanced multicomponent ceramic materials. Designing reaction conditions and precursors for ceramic synthesis can be a laborious, trial-and-error process, as heterogeneous mixtures of precursors often evolve through a complicated series of reaction intermediates. Here, ab initio thermodynamics is used to model which pair of precursors has the most reactive interface, enabling the understanding and anticipation of which non-equilibrium intermediates form in the early stages of a solid-state reaction. In situ X-ray diffraction and in situ electron microscopy are then used to observe how these initial intermediates influence phase evolution in the synthesis of the classic high-temperature superconductor YBa2 Cu3 O6+ x (YBCO). The model developed herein rationalizes how the replacement of the traditional BaCO3 precursor with BaO2 redirects phase evolution through a low-temperature eutectic melt, facilitating the formation of YBCO in 30 min instead of 12+ h. Precursor selection plays an important role in tuning the thermodynamics of interfacial reactions and emerges as an important design parameter in planning kinetically favorable synthesis pathways to complex ceramic materials.
Collapse
|
27
|
Calpa M, Nakajima H, Mori S, Goto Y, Mizuguchi Y, Moriyoshi C, Kuroiwa Y, Rosero-Navarro NC, Miura A, Tadanaga K. Formation Mechanism of β-Li 3PS 4 through Decomposition of Complexes. Inorg Chem 2021; 60:6964-6970. [PMID: 33913700 DOI: 10.1021/acs.inorgchem.1c00294] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
β-Li3PS4 is a solid electrolyte with high Li+ conductivity, applicable to sulfide-based all-solid-state batteries. While a β-Li3PS4-synthesized by solid-state reaction forms only in a narrow 300-450 °C temperature range upon heating, β-Li3PS4 is readily available by liquid-phase synthesis through low-temperature thermal decomposition of complexes composed of PS43- and various organic solvents. However, the conversion mechanism of β-Li3PS4 from these complexes is not yet understood. Herein, we proposed the synthesis mechanism of β-Li3PS4 from Li3PS4·acetonitrile (Li3PS4·ACN) and Li3PS4·1,2-dimethoxyethane (Li3PS4·DME), whose structural similarity with β-Li3PS4 would reduce the nucleation barrier for the formation of β-Li3PS4. Synchrotron X-ray diffraction clarified that both complexes possess similar layered structures consisting of alternating Li2PS4- and Li+-ACN/DME layers. ACN/DME was removed from these complexes upon heating, and rotation of the PS4 tetrahedra induced a uniaxial compression to form the β-Li3PS4 framework.
Collapse
|
28
|
Masubuchi Y, Miyazaki S, Fujii K, Yashima M, Miura A, Higuchi M. Ternary carbodiimide compound, Ba0.9Sr0.1NCN with distorted rutile-type structure. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
29
|
Vásquez FA, Rosero-Navarro NC, Miura A, Jalem R, Goto Y, Nagao M, Tateyama Y, Tadanaga K, Calderón JA. Kinetic Control of the Li 0.9Mn 1.6Ni 0.4O 4 Spinel Structure with Enhanced Electrochemical Performance. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14056-14067. [PMID: 33723987 DOI: 10.1021/acsami.0c17886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of more sustainable societies has become an urgent goal worldwide. Electrical batteries are currently seen as one of the most important energy storage technologies for the development of decarbonized societies. However, many lithium-ion battery manufacturers currently utilize cobalt, a toxic and hazardous mineral, in their batteries. Lithium-deficient manganese nickel oxide spinels are considered promising candidates owing to their high potential and environmental friendliness. Their electrochemical performance highly depends on their average and local structures, such as phase purities, lattice parameters, and cation sites. Thus, a synthesis protocol should be designed to control these structural parameters to improve their electrochemical performance. In this study, we controlled the average and local structures of Li0.9Mn1.6Ni0.4O4 spinels obtained by co-precipitation by optimizing their cooling rates. High-resolution techniques, including transmission electron microscopy, synchrotron X-ray diffraction, and Auger-composition analysis combined with density functional theory calculations, X-ray absorption spectroscopy, and electrochemical analysis, were used to understand the average and local structural variations and their effects on the electrochemical properties. As a result, the control of oxygen diffusion at different cooling rates can promote the rearrangement of the structure, resulting in a cation-disordered spinel with minimal variations in lattice parameters and composition. Excellent electrochemical properties were noted in the cation-disordered spinel with high crystallinity and a slightly oxygen-rich surface produced via optimized cooling rates.
Collapse
|
30
|
Yamashita A, Jha R, Goto Y, Miura A, Moriyoshi C, Kuroiwa Y, Kawashima C, Ishida K, Takahashi H, Mizuguchi Y. Evolution of two bulk-superconducting phases in Sr 0.5RE 0.5FBiS 2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect. Sci Rep 2020; 10:12880. [PMID: 32732897 PMCID: PMC7393496 DOI: 10.1038/s41598-020-69889-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 07/21/2020] [Indexed: 12/02/2022] Open
Abstract
Polycrystalline samples of Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, and Sm) were synthesized via the solid-state reaction and characterized using synchrotron X-ray diffraction. Although all the Sr0.5RE0.5FBiS2 samples exhibited superconductivity at transition temperatures (Tc) within the range of 2.1-2.7 K under ambient pressure, the estimated superconducting volume fraction was small, which indicates non-bulk nature of superconductivity in those samples under ambient pressure. A dramatic increase in shielding fraction, which indicates the emergence of the bulk superconductivity was achieved by applying external hydrostatic pressures. We found that two phases, low-P phases with Tc = 2.5-2.8 K and high-P phases with Tc = 10.0-10.8 K, were induced by the pressure effect for samples with RE = La, Ce, Pr, and Nd. Pressure-Tc phase diagrams indicated that the critical pressure for the emergence of the high-P phase tends to increase with decreasing ionic radius of the doped RE ions, which was explained by the correlation between external and chemical pressure effects. According to the high-pressure X-ray diffraction measurements of Sr0.5La0.5FBiS2, a structural phase transition from tetragonal to monoclinic also occurred at approximately 1.1 GPa. Bulk superconducting phases in Sr0.5RE0.5FBiS2 induced by the external hydrostatic pressure effect are expected to be useful for understanding the effects of both external and chemical pressures to the emergence of bulk superconductivity and pairing mechanisms in BiCh2-based superconductors.
Collapse
|
31
|
Fujita Y, Kinami K, Hanada Y, Nagao M, Miura A, Hirai S, Maruyama Y, Watauchi S, Takano Y, Tanaka I. Growth and Characterization of ROBiS 2 High-Entropy Superconducting Single Crystals. ACS OMEGA 2020; 5:16819-16825. [PMID: 32685850 PMCID: PMC7364703 DOI: 10.1021/acsomega.0c01969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
A series of high-entropy superconductors, ROBiS2 (R = La + Ce + Pr + Nd + Sm), have been successfully grown in the form of single crystals using CsCl flux. The obtained single crystals have a platelike shape with a size of 0.5-2.0 mm and a thickness of 70-450 μm, and they are cleavable along the c-plane. The c-axis lattice constants of the obtained ROBiS2 single crystals have similar values of 13.47-13.57 Å. The Ce in the obtained ROBiS2 single crystals was in a mixed-valence state, comprising both Ce3+ and Ce4+. On the other hand, Pr and Sm showed only the trivalent state. The superconducting transition temperatures of ROBiS2 single crystals were approximately 2-4 K. The superconducting transition temperature and superconducting anisotropies of R-site mixed high-entropy samples increased with a decrease in the mean ionic radius of the R-site. Moreover, a deviation in the tendency to exhibit superconducting properties was observed based on the difference in the R-site mixed entropy. R-site mixed entropy in ROBiS2 superconductors may affect their superconducting properties.
Collapse
|
32
|
Morota T, Sugita S, Cho Y, Kanamaru M, Tatsumi E, Sakatani N, Honda R, Hirata N, Kikuchi H, Yamada M, Yokota Y, Kameda S, Matsuoka M, Sawada H, Honda C, Kouyama T, Ogawa K, Suzuki H, Yoshioka K, Hayakawa M, Hirata N, Hirabayashi M, Miyamoto H, Michikami T, Hiroi T, Hemmi R, Barnouin OS, Ernst CM, Kitazato K, Nakamura T, Riu L, Senshu H, Kobayashi H, Sasaki S, Komatsu G, Tanabe N, Fujii Y, Irie T, Suemitsu M, Takaki N, Sugimoto C, Yumoto K, Ishida M, Kato H, Moroi K, Domingue D, Michel P, Pilorget C, Iwata T, Abe M, Ohtake M, Nakauchi Y, Tsumura K, Yabuta H, Ishihara Y, Noguchi R, Matsumoto K, Miura A, Namiki N, Tachibana S, Arakawa M, Ikeda H, Wada K, Mizuno T, Hirose C, Hosoda S, Mori O, Shimada T, Soldini S, Tsukizaki R, Yano H, Ozaki M, Takeuchi H, Yamamoto Y, Okada T, Shimaki Y, Shirai K, Iijima Y, Noda H, Kikuchi S, Yamaguchi T, Ogawa N, Ono G, Mimasu Y, Yoshikawa K, Takahashi T, Takei Y, Fujii A, Nakazawa S, Terui F, Tanaka S, Yoshikawa M, Saiki T, Watanabe S, Tsuda Y. Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution. Science 2020; 368:654-659. [DOI: 10.1126/science.aaz6306] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 04/02/2020] [Indexed: 11/02/2022]
|
33
|
Morino K, Goto Y, Miura A, Moriyoshi C, Kuroiwa Y, Mizuguchi Y. Crystal Structure and Thermoelectric Transport Properties of As-Doped Layered Pnictogen Oxyselenides NdO 0.8F 0.2Sb 1-xAs xSe 2. MATERIALS 2020; 13:ma13092164. [PMID: 32392874 PMCID: PMC7254281 DOI: 10.3390/ma13092164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/27/2020] [Accepted: 05/04/2020] [Indexed: 11/21/2022]
Abstract
We report the synthesis and thermoelectric transport properties of As-doped layered pnictogen oxyselenides NdO0.8F0.2Sb1−xAsxSe2 (x ≤ 0.6), which are predicted to show high-performance thermoelectric properties based on first-principles calculation. The crystal structure of these compounds belongs to the tetragonal P4/nmm space group (No. 129) at room temperature. The lattice parameter c decreases with increasing x, while a remains almost unchanged among the samples. Despite isovalent substitution of As for Sb, electrical resistivity significantly rises with increasing x. Very low thermal conductivity of less than 0.8 Wm−1K−1 is observed at temperatures between 300 and 673 K for all the examined samples. For As-doped samples, the thermal conductivity further decreases above 600 K. Temperature-dependent synchrotron X-ray diffraction indicates that an anomaly also occurs in the c-axis length at around 600 K, which may relate to the thermal transport properties.
Collapse
|
34
|
Kanda M, Kajimoto C, Kashima H, Ogino A, Miura A, Fukuba Y, Endo MY. Carotid baroreflex control of central and peripheral hemodynamics during recovery after moderate leg cycling exercise. J Appl Physiol (1985) 2020; 128:1477-1486. [PMID: 32352342 DOI: 10.1152/japplphysiol.00023.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
This study aimed to examine the carotid baroreflex (CBR) control of the central and peripheral hemodynamics after exercise using the neck pressure (NP) and neck suction (NS) technique. Sixteen healthy young male participants (age: 27 ± 1.5 yr) were in a supine position for 30 min preexercise, followed by 60 min of cycling exercise, and then returned to a supine position for an additional 60 min postexercise. Both pre- and postexercise, the CBR-mediated responses of the central and peripheral hemodynamics were evaluated using 5-s periods of NP and NS (-60, -40, or +40 mmHg). As the central hemodynamics measurements, heart rate (HR), mean arterial pressure (MAP), cardiac output, and total vascular conductance were assessed. To determine peripheral circulation, vascular conductance in active and inactive limbs was measured. Eight participants [responder (RE) group] showed substantial postexercise hypotension (PEH) during recovery from exercise (Δ MAP: approximately -5 ± 0.9 mmHg, P < 0.05). The other eight participants did not display a reduction in MAP after exercise (non-RE group). In the non-RE group, the responsiveness of CBR-mediated changes in HR, MAP, and vascular conductance increased, particularly in response to -40 mmHg NS during postexercise compared with preexercise. However, in the RE group, any alterations in responsiveness to NP and NS were unchanged during PEH compared with preexercise. In conclusion, some normotensive individuals do not show PEH because the responsiveness of the CBR in central and peripheral hemodynamics following exercise is augmented, particularly to high blood pressure.NEW & NOTEWORTHY The carotid baroreflex (CBR) control of central and peripheral hemodynamics was investigated after exercise in both the presence and absence of postexercise hypotension (PEH). In individuals with no PEH, the responsiveness of CBR-mediated changes in all hemodynamics was augmented after exercise, particularly to high blood pressure; conversely, the CBR responsiveness remained unchanged in individuals with PEH. These findings provide insight into the mechanism of CBR control after exercise.
Collapse
|
35
|
Arakawa M, Saiki T, Wada K, Ogawa K, Kadono T, Shirai K, Sawada H, Ishibashi K, Honda R, Sakatani N, Iijima Y, Okamoto C, Yano H, Takagi Y, Hayakawa M, Michel P, Jutzi M, Shimaki Y, Kimura S, Mimasu Y, Toda T, Imamura H, Nakazawa S, Hayakawa H, Sugita S, Morota T, Kameda S, Tatsumi E, Cho Y, Yoshioka K, Yokota Y, Matsuoka M, Yamada M, Kouyama T, Honda C, Tsuda Y, Watanabe S, Yoshikawa M, Tanaka S, Terui F, Kikuchi S, Yamaguchi T, Ogawa N, Ono G, Yoshikawa K, Takahashi T, Takei Y, Fujii A, Takeuchi H, Yamamoto Y, Okada T, Hirose C, Hosoda S, Mori O, Shimada T, Soldini S, Tsukizaki R, Iwata T, Ozaki M, Abe M, Namiki N, Kitazato K, Tachibana S, Ikeda H, Hirata N, Hirata N, Noguchi R, Miura A. An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime. Science 2020; 368:67-71. [PMID: 32193363 DOI: 10.1126/science.aaz1701] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 03/04/2020] [Indexed: 11/02/2022]
Abstract
The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2's Small Carry-on Impactor. The impact produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for >8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu's surface age.
Collapse
|
36
|
Nagao M, Miura A, Urushihara D, Maruyama Y, Goto Y, Mizuguchi Y, Moriyoshi C, Kuroiwa Y, Wang Y, Watauchi S, Asaka T, Takano Y, Tadanaga K, Tanaka I. Flux Growth and Superconducting Properties of (Ce,Pr)OBiS 2 Single Crystals. Front Chem 2020; 8:44. [PMID: 32117872 PMCID: PMC7010857 DOI: 10.3389/fchem.2020.00044] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/14/2020] [Indexed: 11/13/2022] Open
Abstract
Ce1−xPrxOBiS2 (0. 1 ≤ x ≤ 0.9) single crystals were grown using a CsCl flux method. Their structural and physical properties were examined by X-ray diffraction, X-ray absorption, transmission electron microscopy, and electrical resistivity. All of the Ce1−xPrxOBiS2 single crystals with 0.1 ≤ x ≤ 0.9 exhibited tetragonal phase. With increasing Pr content, the a-axis and c-axis lattice parameters decreased and increased, respectively. Transmission electron microscope analysis of Ce0.1Pr0.9OBiS2 (x = 0.9) single crystal showed no stacking faults. Atomic-resolution energy dispersive X-ray spectrometry mapping revealed that Bi, Ce/Pr, O, and S occupied different crystallographic sites, while Ce and Pr randomly occupied the same sites. X-ray absorption spectra showed that an increase of the Pr ratio increased the ratio of Ce4+/Ce3+. All of the Ce1−xPrxOBiS2 crystals showed superconducting transition, with a maximum transition temperature of ~4 K at x = 0.9.
Collapse
|
37
|
Kubota K, Pang Y, Miura A, Ito H. Redox reactions of small organic molecules using ball milling and piezoelectric materials. Science 2019; 366:1500-1504. [DOI: 10.1126/science.aay8224] [Citation(s) in RCA: 182] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 10/30/2019] [Indexed: 12/20/2022]
Abstract
Over the past decade, photoredox catalysis has harnessed light energy to accelerate bond-forming reactions. We postulated that a complementary method for the redox-activation of small organic molecules in response to applied mechanical energy could be developed through the piezoelectric effect. Here, we report that agitation of piezoelectric materials via ball milling reduces aryl diazonium salts. This mechanoredox system can be applied to arylation and borylation reactions under mechanochemical conditions.
Collapse
|
38
|
Hasegawa J, Kurasaki A, Hata T, Homma C, Miura A, Kondo H, Suzuki N. Diagnosis of placenta accreta spectrum using ultra-high-frequency probe and Superb Microvascular Imaging. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 54:705-707. [PMID: 30584683 DOI: 10.1002/uog.20207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/18/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
|
39
|
Araki K, Suzawa K, Miyauchi S, Miura A, Namba K, Otani S, Yamamoto H, Okazaki M, Sugimoto S, Yamane M, Toyooka S. EP1.01-18 Clinical Features of Locally Advanced Lung Cancer Patients with Radiation Pneumonitis After Induction Chemoradiotherapy. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
40
|
Ito H, Miura A, Goto Y, Mizuguchi Y, Moriyoshi C, Kuroiwa Y, Azuma M, Liu J, Wen XD, Nishioka S, Maeda K, Masubuchi Y, Rosero-Navarro NC, Tadanaga K. An electronic structure governed by the displacement of the indium site in In-S 6 octahedra: LnOInS 2 (Ln = La, Ce, and Pr). Dalton Trans 2019; 48:12272-12278. [PMID: 31339138 DOI: 10.1039/c9dt01562k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An extremely large displacement of the indium site in In-S6 octahedra in LnOInS2 (Ln = La, Ce, and Pr) was found in synchrotron X-ray diffraction. LaOInS2 with off-center indium in In-S6 octahedra exhibited a wider optical band gap than CeOInS2 and PrOInS2 with on-center indium. Therefore, the electronic structure of LnOInS2 is governed by the indium site with an extremely large displacement. All LnOInS2 produced H2 gas under visible light irradiation in the presence of sacrificial electron donors.
Collapse
|
41
|
Fujiwara H, Kanamori J, Nakajima Y, Kawano T, Miura A, Fujita T, Akita K, Daiko H. An anatomical hypothesis: a "concentric-structured model" for the theoretical understanding of the surgical anatomy in the upper mediastinum required for esophagectomy with radical mediastinal lymph node dissection. Dis Esophagus 2019; 32:5250778. [PMID: 30561581 DOI: 10.1093/dote/doy119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 11/04/2018] [Accepted: 11/13/2018] [Indexed: 12/11/2022]
Abstract
Understanding the surgical anatomy is the key to reducing surgical invasiveness especially in the upper mediastinal dissection for esophageal cancer, which is supposed to have a significant impact on curability and morbidity. However, there is no theoretical recognition regarding the surgical anatomy required for esophagectomy, although the surgical anatomy in abdominal digestive surgery has been developed on the basis of embryological findings of intestinal rotation and fusion fascia. Therefore, we developed a hypothesis of a 'concentric-structured model' of the surgical anatomy in the upper mediastinum based on human embryonic development. This model was characterized by three factors: (1) a concentric and symmetric three-layer structure, (2) bilateral vascular distribution, and (3) an 'inter-layer potential space' composed of loose connective tissue. The concentric three-layer structure consists of the 'visceral layer', the 'vascular layer', and the 'parietal layer': the visceral layer containing the esophagus, trachea, and recurrent laryngeal nerves as the central core, the vascular layer of major blood vessels surrounding the visceral core to maintain the circulation, and the parietal layer as the outer frame of the body. The bilateral vascular distribution consists of the inferior thyroid arteries and bronchial arteries originating from the bilateral dorsal aortae in an embryo. This bilateral vascular distribution may be related to the formation of the proper mesentery of the esophagus and frequent lymph node metastasis observed in the visceral layer around recurrent laryngeal nerves. The three concentric layers are bordered by loose connective tissue called the 'inter-layer potential space'. This inter-layer potential space is the fundamental factor of our concentric-structured model as the appropriate surgical plane of dissection. The peripheral blood vessels, nerves, and lymphatics transition between each layer, thereby penetrating this loose connective tissue forming the inter-layer potential space. Recurrent laryngeal nerves also transition from the vascular layer after branching off from the vagal nerves and then ascend consistently in the visceral layer. We investigated the validity of this concentric-structured model, confirming the intraoperative images and the surgical outcomes of thoracoscopic esophagectomy in a prone position (TSEP) before and after the introduction of this hypothetical anatomy model. A total of 226 patients with esophageal cancer underwent TSEP from January 2015 to December 2016. After the introduction of this model, the surgical outcomes in 105 patients clearly improved for the operation time of the thoracoscopic procedure (160 min vs. 182 min, P = 0.01) and the incidence of recurrent laryngeal nerve palsy (19.0% vs. 36.4%, P = 0.004). Moreover, we were able to identify the concentric and symmetric layer structure through surgical dissection along the inter-layer potential space between the visceral and vascular layers ('viscero-vascular space') in all 105 cases after introduction of the hypothetical model. The concentric-structured model based on embryonic development is clinically beneficial for achieving less-invasive esophagectomy by ensuring a theoretical understanding of the surgical anatomy in the upper mediastinum.
Collapse
|
42
|
Iwai Y, Ikka T, Miura A, Rosero-Navarro NC, Iwamura S, Ogino I, Mukai SR, Tadanaga K. Catalytic Activity for Oxygen Reduction Reaction of Ni-Mn-Fe Layered Double Hydroxide-Carbon Gel Composite. CHEM LETT 2019. [DOI: 10.1246/cl.190036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
43
|
Sudo K, Goto Y, Sogabe R, Hoshi K, Miura A, Moriyoshi C, Kuroiwa Y, Mizuguchi Y. Doping-Induced Polymorph and Carrier Polarity Changes in Thermoelectric Ag(Bi,Sb)Se 2 Solid Solution. Inorg Chem 2019; 58:7628-7633. [PMID: 31074617 DOI: 10.1021/acs.inorgchem.9b01038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silver bismuth diselenide (AgBiSe2) is an n-type thermoelectric material that exhibits a complex structural phase transition from the hexagonal to cubic phase, while silver antimony diselenide (AgSbSe2) is a p-type thermoelectric material that crystallizes in the cubic phase at all temperatures. Here, we investigate the crystal structure and thermoelectric properties of Ag(Bi,Sb)Se2 solid solution, employing AgBi0.9Sb0.1Se2 and AgBi0.7Sb0.3Se2 as representative samples. The carrier polarity of AgBi0.9Sb0.1Se2 is converted from the n-type to p-type by Pb doping, accompanied by a polymorphic change to the cubic phase. It is difficult to obtain highly conductive p-type hexagonal AgBiSe2-based materials, although first-principles calculations predict high-performance thermoelectric properties for these systems. We also demonstrate that cubic AgBi0.7Sb0.3Se2 undergoes a polymorphic change to the hexagonal phase upon Nb doping. The present study show that polymorphic changes inevitably occurred upon Pb/Nb doping to optimize thermoelectric properties of Ag(Bi,Sb)Se2 solid solution.
Collapse
|
44
|
Calpa M, Rosero-Navarro NC, Miura A, Tadanaga K. Electrochemical performance of bulk-type all-solid-state batteries using small-sized Li7P3S11 solid electrolyte prepared by liquid phase as the ionic conductor in the composite cathode. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.11.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
45
|
Takahashi Y, Soh J, Miyauchi S, Araki K, Miura A, Kurihara E, Ogoshi Y, Shien K, Yamamoto H, Sugimoto S, Yamane M, Kiura K, Kanazawa S, Toyooka S. P1.17-17 The Impact of Induction Chemoradiotherapy Followed by Surgery for N1 Involved Non-Small Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
46
|
Soh J, Miyauchi S, Araki K, Miura A, Takahashi Y, Kurihara E, Ogoshi Y, Shien K, Yamamoto H, Sugimoto S, Yamane M, Kiura K, Kanazawa S, Toyooka S. P1.17-15 Perioperative Prognostic Nutrition Index for Induction Chemoradiotherapy Followed by Surgery in Locally Advanced Non-Small Lung Cancers. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
47
|
Goto Y, Miura A, Moriyoshi C, Kuroiwa Y, Matsuda TD, Aoki Y, Mizuguchi Y. Na 1-xSn 2P 2 as a new member of van der Waals-type layered tin pnictide superconductors. Sci Rep 2018; 8:12852. [PMID: 30150765 PMCID: PMC6110830 DOI: 10.1038/s41598-018-31295-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/25/2018] [Indexed: 11/30/2022] Open
Abstract
Superconductors with a van der Waals (vdW) structure have attracted a considerable interest because of the possibility for truly two-dimensional (2D) superconducting systems. We recently reported NaSn2As2 as a novel vdW-type superconductor with transition temperature (Tc) of 1.3 K. Herein, we present the crystal structure and superconductivity of new material Na1−xSn2P2 with Tc = 2.0 K. Its crystal structure consists of two layers of a buckled honeycomb network of SnP, bound by the vdW forces and separated by Na ions, as similar to that of NaSn2As2. Amount of Na deficiency (x) was estimated to be 0.074(18) using synchrotron X-ray diffraction. Bulk nature of superconductivity was confirmed by the measurements of electrical resistivity, magnetic susceptibility, and specific heat. First-principles calculation using density functional theory shows that Na1−xSn2P2 and NaSn2As2 have comparable electronic structure, suggesting higher Tc of Na1−xSn2P2 resulted from increased density of states at the Fermi level due to Na deficiency. Because there are various structural analogues with tin-pnictide (SnPn) conducting layers, our results indicate that SnPn-based layered compounds can be categorized into a novel family of vdW-type superconductors, providing a new platform for studies on physics and chemistry of low-dimensional superconductors.
Collapse
|
48
|
Endo Y, Mamiya S, Niitsu H, Miura A, Nishimura S. Reduced Platelet Aggregation Induced by Epinephrine and Idiopathic Thrombocytopenic Purpura in Hereditary Haemorrhagic Teleangiectasia. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1661223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
49
|
Miura A, Nagao M, Goto Y, Mizuguchi Y, Matsuda TD, Aoki Y, Moriyoshi C, Kuroiwa Y, Takano Y, Watauchi S, Tanaka I, Rosero-Navarro NC, Tadanaga K. Crystal Structure and Superconductivity of Tetragonal and Monoclinic Ce 1- xPr xOBiS 2. Inorg Chem 2018; 57:5364-5370. [PMID: 29676897 DOI: 10.1021/acs.inorgchem.8b00349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ce1- xPr xOBiS2 powders and Ce0.5Pr0.5OBiS2 single crystals were synthesized and their structure and superconductive properties were examined by X-ray diffraction, X-ray absorption, electronic resistivity, and magnetization. While PrOBiS2 was found to be in a monoclinic phase with one-dimensional Bi-S zigzag chains showing no superconductive transition above 0.1 K, CeOBiS2 was in a tetragonal phase with two-dimensional Bi-S planes showing zero resistivity below 1.3 K. In the range x = 0.3-0.9 in Ce1- xPr xOBiS2, both monoclinic and tetragonal phases were formed together with zero resistivity up to a maximum temperature of 2.2 K. A Ce0.5Pr0.5OBiS2 single crystal, which showed both zero resistivity and a decrease in magnetization at ∼2.4 K, presented a tetragonal structure. Short Bi-S bonding in flat two-dimensional Bi-S planes and mixed Ce3+/Ce4+ were characteristic features of the Ce0.5Pr0.5OBiS2 single crystal, which presumably triggered its superconductivity.
Collapse
|
50
|
Ramirez D, Suto Y, Rosero-Navarro NC, Miura A, Tadanaga K, Jaramillo F. Structural and Electrochemical Evaluation of Three- and Two-Dimensional Organohalide Perovskites and Their Influence on the Reversibility of Lithium Intercalation. Inorg Chem 2018; 57:4181-4188. [DOI: 10.1021/acs.inorgchem.8b00397] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|