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論文業績papers

学術論文（Original Research Papers）

  • 　　　2025年
　 　
  1. K. Yonemoto, A. Yoshino, Y. Kitadate, M/ Hirano, N. Ohtsu, Parametric investigation in an open atmosphere laser nitriding process of titanium aiming to minimize cracks, Surface and Coatings Technology 505 (2025) 132075
  2. M. Hirano, K. Miura, N. Ohtsu, Hydrogen-free plasma nitriding process for fabrication of expanded austenite layer on AISI 316 stainless steel surface, Materials 18 (2025) 18010140
  3. Y. Sakuraba, R. Kawakami, N. Ohtsu, Microstructure of Repair Welding Heat-Affected Zone of a Mo-Modified AISI H13 Hot-Work Tool Steel for Die-Casting Die, Materials Transactions 66 (2025) 358-365
    • 2024年
  4. R. Kawakami, Y. Matsui, A. Tsuruta, M. Sakairi, N. Ohtsu, Characteristic variations in a pulsed-anodized NiTi alloy surface by the lower voltage setting, Surface and Interface Analysis 56 (2024) 573-579
  5. N. Ohtsu, R. Endo, S. Takeda, Y. Sakuraba, M. Hirano, Open-atmosphere laser nitriding of austenitic steels to form wear-resistant surfaces , Surface and Coatings Technology 476 (2024) 130275
    • 2023年
  6. S. Hiromoto, K. Fukuzawa, K. Doi, M. Chiba, N. Ohtsu, Corrosion protection behavior of aluminate ion-loaded layered double hydroxide coating on AZ31 magnesium alloy, Journal of the electrochemical society 170 (2023) 121502
  7. K. Tate, Y. Matsui, R. Kawakami, A. Tsuruta, N. Ohtsu, Endothelium cell responses on pulsed-anodized NiTi alloy with HNO3, NH4NO3, H2SO4, and (NH4)2SO4 as electrolytes, Materials Transactions 64 (2023) 1265-1270
  8. Z. Wang, N. Ohtsu, K.Tate, Y. Kojima, H. Saifurrahman, M. Ohta, Migration of endothelial cells on the surface of anodized Ni-Ti stent strut, Frontiers in Medical Technology 5 (2023) 1149594
  9. N. Ohtsu, S. Takeda, R. Endo, K. Miura,T. Kiba, Comparison of open-atmosphere nitriding on various metal surfaces triggered by a focused pulsed laser irradiation, Surface and Coatings Technology 454 (2023) 129190
    • 2022年
  10. H.Taniho, K. Tate, R. Kawakami, N. Ohtsu, Characteristic variation of pulsed-anodized NiTi surface by the adjustment of voltage-unapplied state, Surface and Interface Analysis 54 (2022) 1070-1077
  11. N. Ohtsu, R. Endo, S. Takeda, K. Miura, K. Kobayashi An open-atmosphere nitriding process for titanium using a watt-level pulsed Nd:YAG laser, Surface and Coatings Technology 438 (2022) 128362
  12. M. Hirano, S, Takeda, N. Ohtsu, Fabrication of nnoprotrusion surface on AISI 316 stainless steel via Ar-N2 plasma etching, Materials Transactions 63 (2022) 357-362
  13. J. Takahashi, K. Kawakami, K. Miura, M. Hirano, N. Ohtsu, Quantitative analysis of nitrogen by atom probe tomography using stoichiometric γ-Fe4N consisting of 15N isotope, Microscopy and Microanalysis 28 (2022) 42-52
  14. K. Sakamoto, F. Hayashi,N. Ohtsu, XPS study on surface modification of NiTi alloy by acidic solution immersion and subsequent heating in air, Surface and Interface Analysis 54 (2022) 238-245
  15. N. Ohtsu, Y. Kakuchi, T. Takahara, Y. Yoshida, A facile chemical process to form an ultrathin hydroxyapatite layer with a customizable silver-releasing function on a titanium implant. Journal of Biomedical Materials Research Part B 110 (2022) 587-596
    • 2021年
  16. N. Ohtsu, K. Miura, M. Hirano, K. Kodama, Investigation of admixed gas effect on plasma nitriding of AISI316L austenitic stainless steel, Vacuum 193 (2021) 110545
  17. M. Hirano, Y. Konaka. Ohtsu, Bioactivation of yttria-stabilized tetragonal zirconia surface via a chemical treatment processing using a calcium-phosphate slurry, Materials Transactions 62 (2021) 1407-1413
  18. S. Kaku, M. Hashimoto, N. Ohtsu, M. Hoshi, N. Ogawa, T. Miyakoshi, H. Masuda, M. Yoshiwara, K. Fujii, Y. Shimotori, Synthesis, odour characteristics, and antibacterial activity of optically active cognac lactones, Flavour and Fragrance Journal 36 (2021) 584-592
  19. M. Hirano, S. Takeda. Ohtsu, Variation in nanopillar surface on plasma-etched stainless steel owing to the crystal phase and composition, Materials Chemistry and Physics 272 (2021) 125054
  20. K. Yamasaki, H. Taniho, K. Tate,N. Ohtsu, Electrolyte effect in pulsed anodization of NiTi alloy to form a Ni-free oxide layer, Surface and Coatings Technology 417 (2021) 127221
  21. N. Ohtsu, K. Yamasaki, H. Taniho, Y. Konaka, K. Tate, Pulsed anodization of NiTi alloy to form a biofunctional Ni-free oxide layer for corrosion protection and hydrophilicity, Surface and Coatings Technology 412 (2021) 127039
  22. 大津直史，後藤雅貴，白川和哉，邱泰瑛，霜鳥慈岳，小針良仁，永田裕一，村田美樹， 天然食用色素としての応用に向けた和種薄荷乾燥粉末への温水処理効果， 分析化学 70 (2021) 223-230
  23. M. Hirano, M. Hashimoto, K. Miura, N. Ohtsu, Fabrication of antibacterial nanopillar surface on AISI 316 stainless steel through argon plasma etching with direct current discharge, Surface and Coatings Technology 406 (2021) 126680
    • 2020年
  24. 谷友里江, 山口裕太, 横田晴飛, 山田洋文, 大津直史, 宇都正幸, 簡便迅速な土壌中の可給態肥料成分推計のための波長分散型XRFの応用, 分析化学 69 (2020) 685-692
  25. N. Ohtsu, M. Oku, A. Nomura, K. Wagatsuma XPS spectra of chromium monosilicides and disilicides obtained by in situ fractured clean surfaces, Surface and Interface Analysis 52 (2020) 1050-1054
  26. K. Takiguchi, K. Miura, N. Ohtsu, XPS study of a laser‐nitrided iron surface using a focused pulsed Nd:YAG laser under various conditions, Surface and Interface Analysis 52 (2020) 919-923
  27. M. Hirano, M. Yamane, N. Ohtsu, Effects of discharge mode and gas composition for plasma‐hydrophilized titanium surface on hydrophilic sustainability, Surface and Interface Analysis 52 (2020) 835-839
  28. S. Komai, M. Hirano, N. Ohtsu, Spectral analysis of Sr 3d XPS spectrum in Sr-containing hydroxyapatite, Surface and Interface Analysis 52 (2020) 823-828
  29. Y. Shimotori, T. Watanabe, Y. Kohari, T.-Y Chou, N. Ohtsu, Y. Nagata, M. Murata, Enzyme-assisted extraction of bioactive phytochemicals from Japanese peppermint (Mentha arvensis l. cv. ‘hokuto’), Journal of Oleo Science 69 (2020) 635-642
  30. K. Yamasaki, M. Hirano, S. Komai, H. Taniho, N. Ohtsu, Cell responses on Ni-free anodized layer of NiTi alloy with various surface morphologies, Applied Surface Science 531 (2020) 147351
  31. K. Sakamoto, F. Hayashi, K. Sato, M. Hirano, N. Ohtsu, XPS spectral analysis for a multiple oxide comprising NiO, TiO2, and NiTiO3, Applied Surface Science 526 (2020) 146729
  32. K. Yamaguchi, Y. Funane, N. Ohtsu, Effects of alcoholic solvents on the structure of anodized TiO2 layer grown in nitrate electrolyte, Surface and Coatings Technology 387 (2020) 125469
  33. K. Yamaguchi, Y. Konaka, N. Ohtsu, Enhanced hardness and photocatalytic performance in anodic N-doped TiO2 layer on titanium using a non-aqueous nitrate electrolyte, Surface and Coatings Technology 386 (2020) 125424
  34. Y. Kohari, S. Yamashita, T.-Y. Chiou, Y. Shimotori, N. Ohtsu, Y. Nagata, M. Murata, Hydrodistillation by Solvent-Free Microwave Extraction of Fresh Japanese Peppermint (Mentha arvensis L.), Journal of Essential Oil Bearing Plants, 23 (2020) 77-84
    • 2019年
  35. M. Bai, S. Nakazono, K. Yamaguchi, N. Ohtsu, Photocatalytic performance of an anodic TiO2 layer fabricated in a NH4NO3/Ethylene glycol electrolyte with various crystallographic phases, Materials Transactions 60 (2019) 1821-1827
  36. N. Ohtsu, T. Kuji, M. Hirano, K. Yamasaki, Predominant surface property of an anodized titanium that enhances the cell response, Biointerphases 14(4) (2019) 041002
  37. N. Ohtsu, Y. Hirano, K. Yamaguchi, K. Yamasaki, Surface characteristics, Ni ion release, and antibacterial efficacy of anodized NiTi alloy using HNO3 electrolyte of various concentrations, Applied Surface Science 492 (2019) 875-891
  38. N. Ohtsu, M. Bai, K. Yamaguchi, Anomalous anodic layer growth on titanium occurring in electrolyte comprising nitrate and water, Surface and Coatings Technology 374 (2019) 65-71
  39. N. Ohtsu, W. Saito, M. Yamane, Parameter settings in a compact laser‐nitriding system for titanium composed of a focused pulsed Nd:YAG laser and nitrogen gas blow, Surface and Interfance Analysis 51 (2019) 302-307
  40. M. Hirano, Y. Yokoiwa, S. Komai,N. Ohtsu, Enhanced calcification of osteoblast-like cells on zirconium through calcium-phosphate slurry processing, Applied Surface Science 478 (2019) 567-573
  41. S. Nomura, W.-J. Lee, M. Konishi, T. Saitoh, M. Murata, N. Ohtsu, Y. Shimotori, Y. Kohari, Y. Nagata, T.-Y. Chiou, Characteristics of Japanese mint extracts obtained by subcritical-water treatment, Food Science and Technology Research, 25 (5), 695-703
  42. T.-Y. Chiou, M. Konishi, S. Nomura, Y. Shimotori, M. Murata, N. Ohtsu, Y. Kohari, Y. Nagata, T. Saitoh, Utilization of the Japanese peppermint herbal water byproduct of steam distillation as an antimicrobial agent, Food Science and Technology Research, 25 (2019) 793-799
    • 2018年
  43. N. Ohtsu, Y. Kohari, M. Gotoh, R. Yamada, Y. Nagata, M. Murata, Utilization of the Japanese peppermint herbal water byproduct of steam distillation as an antimicrobial agent, Journal of Oleo Science 67 (2018) 1227-1233
  44. T. Ito, N. Ohtsu, M. Tomozawa, M. Hirano, H. Takita, T. Ishizuka, A. Yokoyama, Promotion of bone regeneration on titanium implants through a chemical treatment process using calcium phosphate slurry: Microscopic analysis, cellular response, and animal experiment, Journal of Biomedical Materials Research Part B 106B (2018) 2716-2724
  45. N. Ohtsu, Y. Hirano, K. Takiguchi, Comparison of NiTi alloy surfaces formed by anodization in nitric, phosphoric, and sulfuric acid electrolytes, Surface and Coatings Technology 335 (2018) 306-313
  46. H. Oomae, T. Eguchi, K. Tanaka, M. Yamane, N. Ohtsu, X-ray diffraction and X-ray photoelectron spectroscopy characterization of sulfurized tin thin films deposited by thermal evaporation, Thin Solid Films 645 (2018) 409-416
  47. N. Ohtsu, Y. Kakuchi, T. Ohtsuki, Antibacterial effect of zinc oxide/hydroxyapatite coatings prepared by chemical solution deposition, Applied Surface Science 445 (2018) 596-600 　　　
    • 2017年
  48. N. Ohtsu, T. Kozuka, Y. Shibata, M. Yamane, Effect of plasma nitriding on the structural stability and hydrogen absorption capability of Pd-coated Nb during thermal treatment, Applied Surface Science 423 (2017) 680-685
  49. N. Ohtsu, Y. Hirano, Growth of oxide layers on NiTi alloy surfaces through anodization in nitric acid electrolyte, Surface and Coatings Technology 325 (2017) 75-80
  50. N. Ohtsu, S. Suginishi, M. Hirano, Antibacterial effect of nickel-titanium alloy owing to nickel ion release, Appled Surface Science 405 (2017 215-219
  51. N. Ohtsu, T. Kozuka, M. Yamane, H. Arai, Surface chemistry and osteoblast-like cell response on a titanium surface modified by a focused Nd:YAG laser, Surface and Coatings Technology 309 (2017) 220-226
    • 2016年
  52. N. Ohtsu, K. Sakamoto, Y. Hirano, M. Yamane, XPS analysis of a heat-treated NiTi surfacefor elucidating Ni segregation phenomena, Surface and Interface Analysis 48(2016) 488-492
  53. N. Ohtsu, K. Yokoi, Surface structure and photocatalytic performance of an anodic oxide layer fabricated on titanium in a nitrate/ethylene glycolelectrolyte with different treatment durations, Surfaceand Coatings Technology,294 (2016) 109-114
  54. K. Ishikawa, H. Habaguchi, N. Obata, Y.Kobori, N. Ohtsu, K. Aoki, Formation of surface oxides and its effects on the hydrogen permeability of Nb40Ti30Ni30alloy,International Journal of Hydrogen Energy41 (2016) 5269-5275
  55. 平野雄馬, 大島裕樹, 小俣雅嗣, 大津直史, GF-AASによるリン酸緩衝塩類溶液中Ag，Cu及びNiの正確な定量分析のための溶液調製法の検討, 分析化学 65 (2016) 457-463
  56. N. Ohtsu, K. Ishikawa, Y. Kobor, Hydrogen permeability degradation of Pd-coated Nb-TiNi alloy caused by its interfacial diffusion, Applied Surface Science 360 (2016) 566-571
    • 2015年
  57. K. Satoh, M. Komata, M. Mizuhira, K. Wagatsuma, N. Ohtsu, Direct and rapid quantification of calcium phosphate precipitate on titanium by X-ray fluorescence analysis using fundamental parameter method, Journal of the Japan Institute of Metals, 79 (1) (2015) 1-8
  58. M. Hirano, M. Yamane, N. Ohtsu. Surface characteristics and cell-adhesion performance of titanium treated with direct-current gas plasma comprising nitrogen and oxygen, Applied Surface Science 354(2015) 161-167
  59. N. Ohtsu, K. Yokoi, A. Saito, Fabrication of a visible-light-responsive photocatalytic antibacterial coating on titanium through anodic oxidation in a nitrate/ethylene glycol electrolyte, Surface and Coatings Technology 262(2015) 97-102
  60. P.F. Santos, M. Niinomi, K. Cho, M. Nakai, H. Liu, N. Ohtsu, M. Hirano, M. Ikeda, T. Narushima, Microstructures, mechanical properties and cytotoxicity of low cost beta Ti-Mn alloys for biomedical applications, Acta Biomaterialia, 26(2015) 366-376
  61. S. Hiromoto, M. Inoue, T. Taguchi, M. Yamane, N. Ohtsu, In vitro and in vivo biocompatibility and corrosion behaviour of a bioabsorbable magnesium alloy coated with octacalcium phosphate and hydroxyapatite, Acta Biomaterialia 11 (2015) 520-530
  62. N. Ohtsu, T. Kozuka, M. Hirano, H. Arai, Electrolyte effects on the surface chemistry and cellular response of anodized titanium, Applied Surface Science, 349(2015) 911-915
    • 2014年
  63. M. Hirano, T. Kozuka, Y. Asano, Y. Kakuchi, H. Arai, N. Ohtsu, Effect of sterilization and water rinsing on cell adhesion to titanium surfaces, Applied Surface Science 311(2014) 498-502
  64. S. Semboshi, S. Kimura, A. Iwase, N. Ohtsu, Surface hardening of age-hardenable Cu-Ti dilute alloys by plasma nitriding, Surface and Coatings Technology 258 (2014) 691-698
  65. N. Ohtsu, W. Saito, M. Yamane, Selectable surface nitridation of titanium using focused pulsed Nd: YAG laser irradiation with nitrogen gas blow, Surface and Coatings Technology 246(2014) 52-56
  66. N. Ohtsu, W. Saito, M. Yamane, Thickness of titanium nitride layers formed by focused low-power pulsed Nd: YAG laser irradiation in nitrogen atmospheres, Surface and Coatings Technology 244(2014) 57-62
  67. N. Ohtsu, D. Ishikawa, S. Komiya, K. Sakamoto, Effect of phosphorous incorporation on crystallinity, morphology, and photocatalytic activity of anodic oxide layer on titanium, Thin Solid Films 556(2014) 247-252
  68. S. Komiya, K. Sakamoto, N. Ohtsu, Structural changes of anodic layer on titanium in sulfate solution as a function of anodization duration in constant current mode, Applied Surface Science 296(2014) 163-168
  69. N. Ohtsu, T. Takahara, M. Hirano, H. Arai, Effect of treatment temperature on the biocompatibility and mechanical strength of hydroxyapatite coating formed on titanium using calcium phosphate slurry, Surface and Coatings Technology 239(2014) 185-190
  70. N. Ohtsu, S. Komiya, K. Sakamoto, T. Kuji, F. Sumisa, Fabrication of antibacterial titanium implant using anodic oxidation technique, Materials Science Forum 783-786(2014) 1326-1331
  71. 坂本広太, 小宮谷真司, 高原豊文, 住佐太, 大津直史, 光触媒抗菌試験条件がチタン基板上の大腸菌生存率に与える影響, 日本金属学会誌 78（2014）159-162
  72. N. Ohtsu, M. Hirano, H. Arai, Response of osteoblast-like MC3T3-E1 cells on bioactive titanium fabricated by a chemical treatment process using a calcium-phosphate slurry, Journal of Biomedical Materials Research - Part A, 102 (2014) 3838-3845
  73. K. Sakamoto, K. Yokoi, A. Saito, N. Ohtsu, Photocatalytic activity of the oxide layer formed on niti surface through thermal oxidation process, Materials Transactions 55 (2014) 1332-1336
    • 2013年
  74. K. Satoh, N. Ohtsu, S. Sato, K. Wagatsuma, Surface modification of Ti-6Al-4V alloy using an oxygen glow-discharge plasma to suppress the elution of toxic elements into physiological environment, Surface and Coatings Technology 232(2013) 298-302
  75. Y. Mizukoshi, N. Ohtsu, N. Masahashi, Structural and characteristic variation of anodic oxide on pure Ti with anodization duration, Applied Surface Science 283(2013) 1018-1023
  76. K. Satoh, M. Komata, M. Mizuhira, K. Wagatsuma, N. Ohtsu, Direct and rapid quantification of calcium phosphate precipitate on titanium by x-ray fluorescence analysis using fundamental parameter method, Materials Transactions 54 (2013) 817-824
  77. N. Ohtsu, S. Komiya, K. Kodama, Effect of electrolytes on anodic oxidation of titanium for fabricating titanium dioxide photocatalyst, Thin Solid Films 534 (2013) 70-75
  78. N. Ohtsu, H. Kanno, S. Komiya, Y. Mizukoshi, N. Masahashi, Fabrication of visible-light-responsive titanium dioxide layer on titanium using anodic oxidization in nitric acid, Applied Surface Science, 270 (2013) 513-518
  79. N. Ohtsu, S. Hiromoto, M. Yamane, K. Satoh, M. Tomozawa, Chemical and crystallographic characterizations of hydroxyapatite-and octacalcium phosphate-coatings on magnesium synthesized by chemical solution deposition using XPS and XRD, Surface and Coatings Technology 218 (2013) 114-118
  80. N. Ohtsu, M. Oku, K. Satoh, K. Wagatsuma, Dependence of core-level XPS spectra on iron silicide phase, Applied Surface Science 264 (2013) 219-224
    • 2012年
  81. N. Ohtsu, M. Oku, T. Shishido, K. Wagatsuma, Experimental calibration curve for quantitative XPS analysis constructed from in situ fractured polycrystalline manganese silicide surfaces, Surface and Interface Analysis 44 (2012) 993-996
  82. S. Sato, Y. Arai, N. Yamashita, A. Kojyo, K. Kodama, N. Ohtsu, Y. Okamoto, K. Wagatsuma, Surface-nitriding treatment of steels using microwave-induced nitrogen plasma at atmospheric pressure, Applied Surface Science 258 (2012) 7574-7580
  83. N. Ohtsu, N. Masahashi, Y. Mizukoshi, Angle resolved XPS studies on an anodic oxide formed on Ti-Nb-Sn alloy and the photo-induced change in carbon contaminants adsorbed on its surface, Applied Surface Science 258 (2012) 6052-6055
  84. N. Ohtsu, Y. Nakamura, S. Semboshi, Thin hydroxyapatite coating on titanium fabricated by chemical coating process using calcium phosphate slurry, Surface and Coatings Technology 206 (2012) 2616-2621
    • 2011年
  85. J. Ueta, N. Ohtsu, T. Kanno, K. Tada, J. Horiuchi, Protein adsorption properties on titanium with and without calcium titanate-coating, IOP Conference Series: Materials Science and Engineering 18 (2011) art. no. 192023
  86. Y. Komai, K. Okitsu, R. Nishimura, N. Ohtsu, G. Miyamoto, T. Furuhara, S. Semboshi, Y. Mizukoshi, N. Masahashi, Visible light response of nitrogen and sulfur co-doped TiO2 photocatalysts fabricated by anodic oxidation, Catalysis Today, 164 (2011) 399-403
  87. N. Ohtsu, M. Hayashi, J. Ueta, T. Kanno, Biofunctional calcium titanate coating on titanium by simple chemical treatment process using calcium-hydroxide slurry - Effects of the heating temperatures, Progress in Organic Coatings 70 (2011) 353-357
  88. N. Ohtsu, S. Semboshi, C. Abe, S. Tokuda, Fabrication of composite coating comprising bioactive calcium and sodium titanates on titanium using calcium hydroxide slurry containing sodium ions, Surface and Coatings Technology 205 (2011) 3785-3790
    • 2010年
  89. N. Ohtsu, A. Nomura, T. Shishido, Ni3Al and NiAl by XPS, Surface Science Spectra 17 (1) (2010) pp. 68-75.
  90. N. Ohtsu, M. Yamane, K. Kodama, K. Wagatsuma, Surface hardening of titanium by pulsed Nd:YAG laser irradiation at 1064- and 532-nm wavelengths in nitrogen atmosphere, Applied Surface Science 257 (2010) 691-695
  91. S. Semboshi, N. Ohtsu, Y. Mizukoshi, N. Masahashi Dielectric properties of anodic oxide film on Nb solid solution/Nb2N two phase alloys, Thin Solid Films 519 (2010)719-724
  92. N. Masahashi, Y. Mizukoshi, S. Semboshi, N. Ohtsu, T.K. Jung, S. Hanada, Photo-induced characteristics of a Ti-Nb-Sn biometallic alloy with low Young's modulus, Thin Solid Films 519 (1) (2010)276-283
  93. N. Ohtsu, K. Kodama, K. Kitagawa, K. Wagatsuma, Comparison of surface films formed on titanium by pulsed Nd:YAG laser irradiation at different powers and wavelengths in nitrogen atmosphere, Applied Surface Science 256 (2010) 4522-4526
  94. 阿部千景, 坂本冬樹, 大津直史, 芦野哲也, 我妻和明, 蛍光X線分析法を用いたチタン表面におけるリン酸カルシウム析出量の評価, 日本金属学会誌 74 (2010）237-241
    • 2009年
  95. N. Ohtsu, N. Masahashi, Y. Mizukoshi, K. Wagatsuma, Hydrocarbon decomposition on a hydrophilic TiO2 surface by UV irradiation: Spectral and quantitative analysis using in-situ XPS technique, Langmuir 25 (2009) 11586-11591
  96. N. Ohtsu, K. Kodama, K. Kitagawa, K. Wagatsuma, X-ray photoelectron spectroscopic study on surface reaction on titanium by laser irradiation in nitrogen atmosphere, Applied Surface Science 255 (2009) 7351-7356
  97. Y. Mizukoshi, N. Ohtsu, S. Semboshi, N. Masahashi, Visible light response of sulfur-doped rutile titanium dioxide photocatalysis fabricated by anodic oxidation, Applied Catalysis B Environmental 91 (2009) 152-156
  98. N. Masahashi, Y. Mizukoshi, S. Semboshi, N. Ohtsu, Enhanced photocatalytic activity of rutile TiO2 prepared by anodic oxidization in a high concentric sulfuric acid electrolyte, Applied Catalysis B Environmental 90 (2009) 255-261
  99. C.L. Qin, W. Zhang, K. Asami, N. Ohtsu, A. Inoue, Thermal stability, corrosion resistance, and surface analysis of Cu-Hf-Ti-Ni-Nb bulk metallic glasses, Journal of Materials Research 24 (2009) 316-323
  100. C. Abe, F. Sakamoto, N. Ohtsu, T. Ashino, K. Wagatsuma, Quantitative evaluation of calcium phosphate on surface of titanium by X-ray fluorescence analysis, Materials Transactions 50(2009)2297-2301
  101. 芦野哲也, 大津直史, 我妻和明, 金属系生体材料評価のための溶出試験における擬似体液中微量元素分析, 日本金属学会誌 73 (2009）728-731
  102. J.H. Chang, M.N. Jung, J.S. Park, S.H. Park, I.H. Im, H.J. Lee, J.S. Ha, K. Fujii, T. Hanada, Y. Yao, Y. Murakami, N. Ohtsu, G.S. Kil, X-ray photoelectron spectroscopy study on the Cr-N surface grown on sapphire substrate to control the polarity of ZnO by plasma-assisted molecular beam epitaxy Applied Surface Science 255 (2009) 8582-8586
    • 2008年
  103. N. Masahashi, S. Semboshi, N. Ohtsu, M. Oku, Microstructure and superhydrophilicity of anodic TiO2 films on pure titanium, Thin Solid Films 516 (2008) 7488-7496
  104. N. Ohtsu, C. Abe, T. Ashino, S. Semboshi, K. Wagatsuma, Calcium-hydroxide slurry processing for bioactive calcium-titanate coating on titanium, Surface and Coatings Technology 202(2008) 5110-5115
  105. N. Ohtsu, A. Nomura, M. Oku, T. Shishido, K. Wagatsuma, X-ray photoelectron spectroscopic studies on oxidation behavior of iron and nickel aluminides under oxygen atmosphere at low pressures, Applied Surface Science 254 (2008) 5336-5341
  106. M. Oku, S. Suzuki, N. Ohtsu, T. Shishido, K. Wagatsuma, Comparison of intrinsic zero-energy loss and Shirley-type background corrected profile of XPS spectra for quantitative surface analysis, Applied Surface Science 254 (2008) 5141-5148
  107. N. Ohtsu, M. Oku, A. Nomura. T. Sugawara, T. Shishido, K. Wagatsuma, X-ray photoelectron spectroscopic study on initial oxidation of iron and manganese mono-silicides, Applied Surface Science 254 (2008) 3288-3294
  108. T. Ashino, N. Ohtsu, K. Wagatsuma, Trace analysis of released metallic ions in static immersion test for characterization of metallic biomaterials, Materials Transactions 49 (2008) 1342-1345
  109. M. Nakai, M. Niinomi, T. Akahori, N. Ohtsu, H. Nishimura, H. Toda, H. Fukui, M. Ogawa, Surface hardening of biomedical Ti-29Nb-13Ta-4.6Zr and Ti-6Al-4V ELI by gas nitriding, Materials Science and Engineering A 486 (2008) 193-201
  110. N. Masahashi, Y. Mizukoshi, S. Semboshi, N. Ohtsu, Superhydrophilicity of Rutile TiO2 prepared by anodic oxidization in high concentration sulfuric acid electrolyte, Chemistry Letters 37 (2008) 1126-1127
  111. S. Semboshi, K. Bando, N. Ohtsu, Y. Shim, T.J. Konno, Structural and dielectric properties of anodically oxidized film on Nb-Ti , Thin Solid Films 516 (2008) 8613-8619
  112. Y. He, P. Sharma, K. Biswas, E.Z. Liu, N. Ohtsu, A. Inoue, Y. Inada, M. Nomura, J.S. Tse, S. Yin, J.Z. Jiang, Origin of ferromagnetism in ZnO codoped with Ga and Co: Experiment and theory, Physical Review B 78 (2008) 155202
    • 2007年
  113. N. Ohtsu, K. Sato, A. Yanagawa, K. Saito, Y. Imai, T. Kohgo, A. Yokoyama, K. Asami, T. Hanawa, CaTiO3 coating on titanium for biomaterial application - optimum thickness and tissue response, Journal of Biomedical Materials Research Part A 82A (2007) 304-315
  114. N. Ohtsu, A. Ito, K. Saito, T. Hanawa Characterization of calcium-titanate thin films deposited on titanium with reactive sputtering and pulsed laser depositions, Surface and Coatings Technology 201 (2007) 7686-7691
  115. N. Ohtsu, M. Oku, K. Obara, S. Ito, T. Shishido, K. Wagatsuma, Oxidation behavior of NiAl alloy at low temperatures, Surface and Interface Analysis 33 (2007) 528-532
  116. N. Ohtsu, B. Tsuchiya, M. Oku, T. Shikama, K. Wagatsuma, X-ray photoelectron spectroscopic study on initial oxidation of hafnium hydride fractured in an ultra-high vacuum, Applied Surface Science 253 (2007) 6844-6847
  117. N. Ohtsu, M. Oku, T. Shishido, K. Wagatsuma, X-ray photoelectron spectroscopic studies on phase identification and quantification of nickel aluminides, Applied Surface Science 253 (2007) 8713-8717
  118. N. Ohtsu, K. Sato, K. Saito, K. Asami, T. Hanawa, Calcium phosphates formation on CaTiO3 coated titanium Journal of Materials Science Materials in Medicine 18 (2007)1009-1016
  119. M. Nakai, M. Niinomi, T. Akahori, N. Ohtsu, H. Nishimura, H. Toda, H. Fukui, M. Ogawa, Hard-ceramic layer formation on Ti-29Nb-13Ta-4.6Zr and Ti-6Al-4V ELI during gas nitriding, Materials Science Forum 232 (2007) 1509-1512
  120. 仲井正昭, 新家光雄, 赤堀俊和, 大津直史, 西村英樹, 戸田裕之, 福井壽男, 小川道治, ガス窒化による生体用Ti-29Nb-13Ta-4.6Zr合金およびTi-6Al-4V合金表面の硬質皮膜生成に及ぼす合金元素の影響, 日本金属学会誌 71 (2007) 415-422
  121. C.L. Qin, J.J. Oak, N. Ohtsu, K. Asami, A. Inoue, XPS study on the surface film of newly designed Ni-free Ti-based bulk metallic glass, Acta Materialia 55 (2007) 2057-2063
  122. N. Ohtsu, T. Ashino, K. Takada, H. Kimura, T. Hanawa Investigation for analytical procedure for determination of trace metallic ions in simulated body fluids by inductively coupled plasma atomic emission spectrometry (ICP-AES), Journal of Materials Science Materials in Medicine 18 (2007) 429-433
  123. N. Ohtsu, K. Saito, K. Asami, T. Hanawa, H. Kimura, Characterization and dissolution behavior in a physiological solution of heart-treated CaTiO3 thin film with different thicknesses, Solid States Phenomena 127 (2007) 209-214
  124. N. Ohtsu, T. Ashino, M. Ishihara, F. Sakamoto, T. Hanawa, Calcium phosphate formation on titanium modified with newly developed calcium-hydroxide-slurry treatment, Materials Transactions 48 (2007) 105-110
    • 2006年
  125. N. Ohtsu, K. Saito, K. Asami, T. Hanawa, Characterization of CaTiO3 thin film prepared by ion-beam assisted deposition, Surface and Coatings Technology 200 (2006) 5455-5461
  126. A. Kawashima, S. Yamaura, N. Ohtsu, H. Kimura, A. Inoue, Mechanical properties of melt-spun amorphous Ni-Nb-Zr alloys after hydrogen charging, Materials Transactions 47 (2006) 1523-1526
  127. T. Adachi, S. Nagata, N. Ohtsu, B. Tsuchiya, K. Toh, T. Shikama, Hydrogen accumulation in surface of perfluorosulfonic acid membranes after gamma-ray irradiation, using elastic recoil detection techniques, Japanese Journal of Applied Physics Part 1 45 (2006) 6385-6387
    • 2005年
  128. B. Tsuchiya, S. Nagata, N. Ohtsu, K. Toh, T. Shikama, Thermal Desorption of Hydrogen at the Titanium Hydride-Oxide Interface, Materials Transactions 46 (2005) 196-198
  129. C.L. Qin, W. Zhang, K. Asami, N. Ohtsu, A. Inoue, Glass formation, corrosion behavior and mechanical properties of bulk glassy Cu-Hf-Ti-Nb alloys, Acta Materialia 53 (2005) 3903-3911
  130. K. Asami, N. Ohtsu, K. Saito, T. Hanawa, CaTiO3 films sputter-deposited under simultaneous Ti-ion implantation on Ti-substrate, Surface and Coatings Technology 200 (2005) 1005-1008
  131. S. Nakano, N. Ohtsu, S. Nagata, S. Yamaura, S. Uchinashi, H. Kimura, T. Shikama, A. Inoue, Measurement of the electrical resistance and the hydrogen depth distribution for Ni60Nb20Zr20 amorphous alloy before and after hydrogen charging, Solid State Communication 133 (2005) 622-513
    • 2004年
  132. A. Kawashima, T. Sato, N. Ohtsu, K. Asami, Characterization of Surface Amorphous Ni-Nb-Ta-P Alloys Passivated in a 12 kmol/m3 HCl Solution, Materials Transactions 45 (2004) 131-136
  133. S. Nagata, S. Yamamoto, K. Toh, B. Tsuchiya, N. Ohtsu, T. Shikama, H. Naramoto, Luminescence in SiO2 induced by MeV energy proton irradiation, Journal of Nuclear Materials 329 (2004) 1507-1510
  134. N. Ohtsu, K. Sato, K. Saito, T. Hanawa, K. Asami, Evaluation of degradability of CaTiO3 thin film in simulated body fluids, Materials Transactions 45 (2004) 1778-1781
  135. T. Adachi, S. Nagata, N. Ohtsu, B. Tsuchiya, K. Toh, N. Morishita, M. Yamauchi, N. Nishitani, T. Shikama, Effects of γ-ray and neutron irradiation on electrical characteristic of proton-conducting polymer electrolyte membranes, Journal of Nuclear Materials 329-333 (2004) 1499-1502
  136. N. Ohtsu, T. Ashino, K. Asami, Silicon contamination adsorbed on pure titanium plate during soaking test in Hanks’balanced saline solution, Materials Transactions 45 (2004) 550-553
    • 2003年
  137. S. Nagata, B. Tsuchiya, N. Ohtsu, T. Sugawara, T. Shikama, K. Tokunaga, M. Takenaka, E. Kuramoto, Hydrogen and deuterium uptake in helium implanted layer of Mo and W, Journal of Nuclear Materials 313-316 (2003) 279-283
  138. B. Tsuchiya, K. Morita, S. Yamamoto, S. Nagata, N. Ohtsu, T. Shikama, H. Naramoto, Re-emission of hydrogen implanted into graphite by helium ion bombardment, Journal of Nuclear Materials 313-316 (2003) 274-278
  139. S. Nagata, K. Tokunaga, B. Tsuchiya, N. Ohtsu, T. Sugawara, T. Shikama, Hydrogen accumulation in the helium implanted surface of Mo single crystals, Journal of Alloys and Compounds 356-357 (2003) 326-329
  140. K. Asami, K. Saito, N. Ohtsu, S. Nagata, T. Hanawa Titanium-implanted CaTiO3 films and their change in Hanks’solution, Surface and Interface Analysis 35 (2003) 483-488
    • 2002年
  141. S. Nagata, B. Tsuchiya, T. Sugawara, N. Ohtsu, T. Shikama, Helium and hydrogen trapping in W and Mo single-crystals irradiated by He ions, Journal of Nuclear Materials 307-311 (2002) 1513-1516
  142. S. Nagata, B. Tsuchiya, T. Sugawara, N. Ohtsu,T. Shikama, Ion beam analysis of helium and its irradiation effect on hydrogen trapping in W single crystals, Nuclear Instruments and Methods in Physics Research B 190 (2002) 652-656