76
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Nakagomi A, Sunami Y, Okada S, Ohno Y, Shoji T, Fujisawa T, Kobayashi Y. P5460Association between arterial stiffness and metabolic risk factors in apparent healthy and prediabetic subjects. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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77
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Goto H, Kariya R, Kudo E, Okuno Y, Ueda K, Katano H, Okada S. Restoring PU.1 induces apoptosis and modulates viral transactivation via interferon-stimulated genes in primary effusion lymphoma. Oncogene 2017; 36:5252-5262. [PMID: 28481873 DOI: 10.1038/onc.2017.138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/22/2017] [Accepted: 03/24/2017] [Indexed: 12/20/2022]
Abstract
Primary effusion lymphoma (PEL), which is an aggressive subgroup of B-cell lymphoma associated with Kaposi sarcoma-associated herpes virus/human herpes virus-8, is refractory to the standard treatment, and exhibits a poor survival. Although PU.1 is downregulated in PEL, the potential role of its reduction remains to be elucidated. In this investigation, we analyzed the DNA methylation of PU.1 cis-regulatory elements in PEL and the effect of restoring PU.1 on PEL cells. The mRNA level of PU.1 was downregulated in PEL cells. The methylated promoter and enhancer regions of the PU.1 gene were detected in PEL cells. Suppression of cell growth and apoptosis were caused by the restoration of PU.1 in PEL cells. A microarray analysis revealed that interferon-stimulated genes (ISGs) including pro-apoptotic ISGs were strongly increased in BCBL-1 cells after the induction of PU.1. Reporter assays showed that PU.1 transactivated pro-apoptotic ISG promoters, such as the XAF1, OAS1 and TRAIL promoters. Mutations at the PU.1 binding sequences suppressed its transactivation. We confirmed the binding of PU.1 to the XAF1, OAS1 and TRAIL promoters in a chromatin immunoprecipitation assay. PU.1 suppressed ORF57 activation by inducing IRF7. The reinduction of PU.1 reduced formation of ascites and lymphoma cell infiltration of distant organs in PEL xenograft model mice. Collectively, PU.1 has a role in tumor suppression in PEL and its down-regulation is associated with PEL development. Restoring PU.1 with demethylation agents may be a novel therapeutic approach for PEL.
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78
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Takao T, Kubota K, Maeda T, Okada S, Morishita Y, Mori E, Yugue I, Kawano O, Sakai H, Ueta T, Shiba K. A radiographic evaluation of facet sagittal angle in cervical spinal cord injury without major fracture or dislocation. Spinal Cord 2016; 55:515-517. [DOI: 10.1038/sc.2016.172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 10/29/2016] [Accepted: 10/30/2016] [Indexed: 11/09/2022]
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79
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Takahashi MK, Okada S, Fukuda Y. From embryos to larvae: seven‐month‐long paternal care by male Japanese giant salamander. J Zool (1987) 2016. [DOI: 10.1111/jzo.12433] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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Manabe R, Okada S, Inagaki R, Oshima K, Ogo S, Sekine Y. Surface Protonics Promotes Catalysis. Sci Rep 2016; 6:38007. [PMID: 27905505 PMCID: PMC5131306 DOI: 10.1038/srep38007] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 11/04/2016] [Indexed: 12/21/2022] Open
Abstract
Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO2 catalyst in an electric field, thanks to the surface protonics. Kinetic analyses demonstrated the synergetic effect between catalytic reaction and electric field, revealing strengthened water pressure dependence of the reaction rate when applying an electric field, with one-third the apparent activation energy at the lower reaction temperature range. Operando–IR measurements revealed that proton conduction via adsorbed water on the catalyst surface occurred during electric field application. Methane was activated by proton collision at the Pd–CeO2 interface, based on the inverse kinetic isotope effect. Proton conduction on the catalyst surface plays an important role in methane activation at low temperature. This report is the first describing promotion of the catalytic reaction by surface protonics.
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81
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Shi H, Bazzi M, Beer G, Bellotti G, Berucci C, Bragadireanu A, Bosnar D, Cargnelli M, Curceanu C, Butt A, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Marton J, Okada S, Pietreanu D, Piscicchia K, Romero Vidal A, Sbardella E, Scordo A, Sirghi D, Sirghi F, Tatsuno H, Vazquez Doce O, Widmann E, Zmeskal J. Precision X-ray spectroscopy of kaonic atoms as a probe of low-energy kaon-nucleus interaction. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201612604045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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82
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Hara T, Soyama A, Hidaka M, Kitasato A, Ono S, Natsuda K, Kugiyama T, Imamura H, Okada S, Baimakhanov Z, Kuroki T, Eguchi S. Analysis of early relaparotomy following living donor liver transplantation. Liver Transpl 2016; 22:1519-1525. [PMID: 27342832 DOI: 10.1002/lt.24500] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/11/2016] [Indexed: 12/17/2022]
Abstract
We retrospectively analyzed the causes, risk factors, and impact of early relaparotomy after adult-to-adult living donor liver transplantation (LDLT) on the posttransplant outcome. Adult recipients who underwent initial LDLT at our institution between August 1997 and August 2015 (n = 196) were included. Any patients who required early retransplantation were excluded. Early relaparotomy was defined as surgical treatment within 30 days after LDLT. Relaparotomy was performed 66 times in 52 recipients (a maximum of 4 times in 1 patient). The reasons for relaparotomy comprised postoperative bleeding (39.4%), vascular complications (27.3%), suspicion of abdominal sepsis or bile leakage (25.8%), and others (7.6%). A multivariate analysis revealed that previous upper abdominal surgery and prolonged operative time were independent risk factors for early relaparotomy. The overall survival rate in the relaparotomy group was worse than that in the nonrelaparotomy group (6 months, 67.3% versus 90.1%, P < 0.001; 1 year, 67.3% versus 88.6%, P < 0.001; and 5 years, 62.6% versus 70.6%, P = 0.06). The outcome of patients who underwent 2 or more relaparotomies was worse compared with patients who underwent only 1 relaparotomy. In a subgroup analysis according to the cause of initial relaparotomy, the survival rate of the postoperative bleeding group was comparable with the nonrelaparotomy group (P = 0.96). On the other hand, the survival rate of the vascular complication group was significantly worse than that of the nonrelaparotomy group (P = 0.001). Previous upper abdominal surgery is a risk factor for early relaparotomy after LDLT. A favorable longterm outcome is expected in patients who undergo early relaparotomy due to postoperative bleeding. Liver Transplantation 22 1519-1525 2016 AASLD.
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83
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Kobayashi K, Nagakawa K, Fujita F, Inoue Y, Okada S, Murakami S, Kanetaka K, Yamanouchi K, Kuroki T, Eguchi S. Bmab+oral 5-FU therapy is appropriate for first-line treatment of elderly patients with ARCC. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw521.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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84
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Lindenmayer DB, Mortelliti A, Ikin K, Pierson J, Crane M, Michael D, Okada S. The vacant planting: limited influence of habitat restoration on patch colonization patterns by arboreal marsupials in south‐eastern Australia. Anim Conserv 2016. [DOI: 10.1111/acv.12316] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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85
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Tanaka H, Kato A, Kawaguchi M, Yamaguchi T, Kitahara M, Matsuyama K, Okada S, Matsuo M. Pelvic Insufficiency Fractures After Whole-Pelvic Irradiation for Uterine Cervical Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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86
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Tanaka H, Yamaguchi T, Kawaguchi M, Okada S, Matsuo M. Pretreatment Maximum Standardized Uptake Value on 18F-Fluorodeoxyglucose Positron Emission Tomography Is a Predictor of Outcome for Stage I Non-Small Cell Lung Cancer After Stereotactic Body Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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87
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Matsubara E, Okada S, Ichitsubo T, Kawaguchi T, Hirata A, Guan PF, Tokuda K, Tanimura K, Matsunaga T, Chen MW, Yamada N. Initial Atomic Motion Immediately Following Femtosecond-Laser Excitation in Phase-Change Materials. PHYSICAL REVIEW LETTERS 2016; 117:135501. [PMID: 27715090 DOI: 10.1103/physrevlett.117.135501] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Indexed: 06/06/2023]
Abstract
Despite the fact that phase-change materials are widely used for data storage, no consensus exists on the unique mechanism of their ultrafast phase change and its accompanied large and rapid optical change. By using the pump-probe observation method combining a femtosecond optical laser and an x-ray free-electron laser, we substantiate experimentally that, in both GeTe and Ge_{2}Sb_{2}Te_{5} crystals, rattling motion of mainly Ge atoms takes place with keeping the off-center position just after femtosecond-optical-laser irradiation, which eventually leads to a higher symmetry or disordered state. This very initial rattling motion in the undistorted lattice can be related to instantaneous optical change due to the loss of resonant bonding that characterizes GeTe-based phase change materials. Based on the amorphous structure derived by first-principles molecular dynamics simulation, we infer a plausible ultrafast amorphization mechanism via nonmelting.
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Shimada J, Ito K, Okada S, Abe K, Inoue M. P-227NOVEL POROUS POLYPROPYLENE DISSECTOR WITH SURGICAL SMOKE EVACUATION SYSTEM. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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89
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Okada S, Katagiri K, Kumazaki T, Yokoyama H. Safety of gadolinium contrast agent in hemodialysis patients. Acta Radiol 2016; 42:339-41. [PMID: 11350296 DOI: 10.1080/028418501127346756] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Purpose: We evaluated the safety of a gadolinium (Gd) contrast agent in hemodialysis patients. Material and Methods: Seventy hemodialysis patients underwent contrast-enhanced MR examination. After the examination, the patients were hemodialyzed on a usual schedule, i.e., 3 times per week at 4 h each session. The hemodialysis was performed on the same day in 16 patients, the next day in 34, 2 days later in 14 and 3 days later in 6 patients. Serum Gd concentrations before and after the first to fourth hemodialysis sessions were analyzed in 11 patients. Cardiovascular, cutaneous, respiratory, psycho-neurological and digestive side effects were evaluated in all patients. Changes in liver and kidney functions, blood counts, and electrolytes were also checked. Results and Conclusion: Neither side effects nor blood changes were noted in any of the patients. Average excretory rates were 78.2%, 95.6%, 98.7% and 99.5% in the first to fourth hemodialysis sessions, respectively. These results suggest that Gd contrast agents can be used in hemodialysis patients if hemodialysis is carried out promptly after the examination.
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90
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Abstract
Cytokinesis is essential for development and survival of all organisms by increasing cell number and diversity. It is a highly regulated process that requires spatiotemporal coordination of hundreds of proteins functioning in the assembly, constriction, and disassembly of a contractile actomyosin ring, targeted vesicle fusion, and localized extracellular matrix remodeling. Cytokinesis has been studied in multiple systems with a wide range of technologies to learn the common principles. In this chapter, we describe the analysis of protein dynamics during cytokinesis in the budding yeast Saccharomyces cerevisiae by several live-cell imaging methods. This, in combination with the power of yeast genetics, has yielded novel insights into the mechanism of cytokinesis. Similar approaches are increasingly used to study this fundamental process in more complex systems.
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91
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Okada S, Azuma T, Kawashita Y, Matsuo S, Eguchi S. Clinical Evaluation of Hepatic Portal Venous Gas after Abdominal Surgery. Case Rep Gastroenterol 2016; 10:99-107. [PMID: 27403110 PMCID: PMC4929365 DOI: 10.1159/000444444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/02/2016] [Indexed: 12/21/2022] Open
Abstract
Hepatic portal venous gas (HPVG) is induced by various abdominal diseases. Since HPVG is accompanied by bowel ischemia, intestinal infection and hypovolemia, various modes of critical management are needed to treat the underlying conditions. HPVG associated with abdominal complications after surgery has rarely been reported. We present 4 patients with HPVG after abdominal surgery: 2 of the 4 patients died of multiple organ failure, and the other 2 recovered with solely conservative therapy. Although postoperative HPVG is a severe and life-threatening condition, early detection and systemic treatment lead to a better patient outcome.
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92
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Shinji A, Okada S, Nakamura T. [A Case of Chordoma of the Sacrum Treated with Pazopanib]. Gan To Kagaku Ryoho 2016; 43:267-269. [PMID: 27067697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A-70-year-old man with chordoma of the sacrum was treated with pazopanib (initially 400 mg/day, upto 800 mg/day). After 2 months of treatment, a significant tumor reduction was achieved and the patient was able to sit down easily. Therefore, the pazopanib therapy was continued. He had 14 months of progression-free survival.
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93
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Demongeot A, Mougnier SJ, Okada S, Soulié-Ziakovic C, Tournilhac F. Coordination and catalysis of Zn2+ in epoxy-based vitrimers. Polym Chem 2016. [DOI: 10.1039/c6py00752j] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Network-coordinated Zn2+ ions activate carbonyls, promote alkoxides and hold reactants close to each other for transesterification.
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94
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Tatsuno H, Bazzi M, Beer G, Bellotti G, Berucci C, Bragadireanu A, Bosnar D, Cargnelli M, Curceanu C, Butt A, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Marton J, Okada S, Pietreanu D, Piscicchia K, Romero Vidal A, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Vazquez Doce O, Widmann E, Zmeskal J. Future projects of light kaonic atom X-ray spectroscopy. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613001018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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95
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Tatsuno H, Doriese WB, Bennett DA, Curceanu C, Fowler J, Gard J, Gustafsson FP, Hashimoto T, Hayano RS, Hays-Wehle JP, Hilton GC, Iliescu M, Ishimoto S, Itahashi K, Iwasaki M, Kuwabara K, Ma Y, Marton J, Noda H, O’Neil GC, Okada S, Outa H, Reintsema CD, Sato M, Schmidt DR, Shi H, Suzuki K, Suzuki T, Uhlig J, Ullom JN, Widmann E, Yamada S, Zmeskal J, Swetz DS. Absolute Energy Calibration of X-ray TESs with 0.04 eV Uncertainty at 6.4 keV in a Hadron-Beam Environment. JOURNAL OF LOW TEMPERATURE PHYSICS 2016; 184:10.1007/s10909-016-1491-2. [PMID: 39473821 PMCID: PMC11520306 DOI: 10.1007/s10909-016-1491-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 01/07/2016] [Indexed: 11/02/2024]
Abstract
A performance evaluation of superconducting transition-edge sensors (TESs) in the environment of a pion beam line at a particle accelerator is presented. Averaged across the 209 functioning sensors in the array, the achieved energy resolution is 5.2 eV FWHM at Co K α (6.9 keV) when the pion beam is off and 7.3 eV at a beam rate of 1.45 MHz. Absolute energy uncertainty of ±0.04 eV is demonstrated for Fe K α (6.4 keV) with in-situ energy calibration obtained from other nearby known X-ray lines. To achieve this small uncertainty, it is essential to consider the non-Gaussian energy response of the TESs and thermal cross-talk pile-up effects due to charged particle hits in the silicon substrate of the TES array.
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96
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Marton J, Bazzi M, Beer G, Berucci C, Bosnar D, Bragadireanu A, Cargnelli M, Clozza A, Curceanu C, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Sandri PL, Okada S, Pietreanu D, Piscicchia K, Ponta T, Quaglia R, Vidal AR, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Tatsuno H, Doce OV, Widmann E, Zmeskal J. Strong interaction studies with kaonic atoms. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611303009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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97
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Horvath TA, Hirano T, Horvathova MD, Vomela J, Vyzula R, Cı́halová M, Dorociak F, Ebihara Y, Furukawa K, Habanec B, Ikeda N, Kakihana M, Klusáková J, Okada S, Rejthar A, Stratil D, Shaffi-Sahely A, Smajer B, Spelda S, Tsuboi M, Vagunda V, Wurst F, Kato H. Autofluorescence (safe) bronchoscopy and p21/ki-67 immunostaining related to carcinogenesis. Photodiagnosis Photodyn Ther 2015; 1:13-22. [PMID: 25048060 DOI: 10.1016/s1572-1000(04)00005-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Archival biopsy materials from 20 randomly selected asymptomatic volunteers from the Czech uranium miners (CZ UM) risk group (n=98) were examined for p21 and ki-67 immunostatning. There were 16 areas with normal respiratory epithelium and 22 areas with bronchial intra-epithelial neoplasia (IEN). Normal and IEN areas were identified by autofluorescence (System Autofluorescence Endoscopy, SAFE-1000) and monitored during 1998-2002. The majority of specimens from areas with normal autofluorescence intensity with ciliated columnar bronchial epithelium showed strong predominantly cytoplasmic p21 positivity. The SAFE monitoring divided areas of decreased autofluorescence intensity with early stage IEN lesions into two groups. Persistent lesions (P)-showing a spectrum of p21 cytoplasmic staining ranging from negative or isolated negativity to weak or moderate positivity combined with higher proliferative capacity proved by ki-67 nuclear staining. Disappearing lesions (D)-showing strong cytoplasmic p21 positivity and negative ki-67 staining. The IEN lesions were classified into three groups based on p21/ki-67 immunostaining: proliferative lesions at risk (R) with low or without p21 plasma immunostaining combined with high ki-67 nuclear reactivity; ambiguous lesions (A) including cases combining strong p21 cytoplasmic positivity with high ki-67 nuclear reactivity or p21 cytoplasmic negativity with ki-67 negativity staining patterns; the quiescent lesion group (Q) was characterized by strong p21 cytoplasmic positivity and negative ki-67 immunostaining.
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98
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Kubota K, Kobayakaya K, Okada S, Shiba K, Iwamoto Y. Hyperglycemia During Acute Spinal Cord Injury Is a Detrimental Factor That Impairs Functional Improvement in Acute C3-C4 Cervical Cord Injury Patients Without Any Bony Damages. Intensive Care Med Exp 2015. [PMCID: PMC4797914 DOI: 10.1186/2197-425x-3-s1-a33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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99
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Matsumoto D, Yanagi K, Takenobu T, Okada S, Marumoto K. Electrically induced ambipolar spin vanishments in carbon nanotubes. Sci Rep 2015; 5:11859. [PMID: 26148487 PMCID: PMC4493558 DOI: 10.1038/srep11859] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 06/09/2015] [Indexed: 11/16/2022] Open
Abstract
Carbon nanotubes (CNTs) exhibit various excellent properties, such as ballistic transport. However, their electrically induced charge carriers and the relation between their spin states and the ballistic transport have not yet been microscopically investigated because of experimental difficulties. Here we show an electron spin resonance (ESR) study of semiconducting single-walled CNT thin films to investigate their spin states and electrically induced charge carriers using transistor structures under device operation. The field-induced ESR technique is suitable for microscopic investigation because it can directly observe spins in the CNTs. We observed a clear correlation between the ESR decrease and the current increase under high charge density conditions, which directly demonstrated electrically induced ambipolar spin vanishments in the CNTs. The result provides a first clear evidence of antimagnetic interactions between spins of electrically induced charge carriers and vacancies in the CNTs. The ambipolar spin vanishments would contribute the improvement of transport properties of CNTs because of greatly reduced carrier scatterings.
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100
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Nakagomi A, Okada S, Shoji T, Kobayashi Y. 2D.08. J Hypertens 2015. [DOI: 10.1097/01.hjh.0000467429.87677.d1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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