World's Best Scientists 2026 revealed!
Kazukiyo Nagai

Kazukiyo Nagai

D-Index & Metrics

Materials Science

D-Index
42
Citations
9304
World Ranking
12486
National Ranking
782

Kazukiyo Nagai publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Kazukiyo Nagai sits on this spectrum.

50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50 publications 1,163+

This scientist: 162 publications — 18th percentile

18% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

Kazukiyo Nagai D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Kazukiyo Nagai sits on this spectrum.

40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40 D-Index 165+

This scientist: 42 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

Overview

Kazukiyo Nagai is affiliated with Meiji University in Japan and conducts research primarily in the fields of Materials Science and Engineering. Their scholarly work covers several subfields, including Polymers and Plastics, Mechanical Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry, and Biomaterials.

Their research topics focus on areas such as synthesis and properties of polymers, membrane separation and gas transport, liquid crystal research advancements, photochromic and fluorescence chemistry, membrane separation technologies, biodegradable polymer synthesis and properties, and advanced sensor and energy harvesting materials.

Recent papers authored or co-authored by Nagai include:

  • Activated carbon nanofibers incorporated metal oxides for CO2 adsorption: Effects of different type of metal oxides (2021), Journal of CO2 Utilization
  • Photo-isomerization, photodimerization, and photodegradation polyimides for a liquid crystal alignment layer (2022), Polymers for Advanced Technologies
  • Suppressed crystallization and enhanced gas permeability in thin films of cellulose acetate blends (2020), Polymer
  • Effects of Nanofiller-Induced Crystallization on Gas Barrier Properties in Poly(lactic acid)/Montmorillonite Composite Films (2020), Industrial & Engineering Chemistry Research
  • Helical structures and water vapor sorption properties of carrageenan membranes derived from red algae (2022), Carbohydrate Polymer Technologies and Applications

Frequent co-authors in Nagai's publications include:

  • Shūichi Satō
  • Norhaniza Yusof
  • Ahmad Fauzi Ismail
  • Juhana Jaafar
  • Farhana Aziz

Their work is published in a range of scholarly venues, with multiple papers appearing in:

  • Polymer (2 publications)
  • Carbohydrate Polymer Technologies and Applications (2 publications)
  • Journal of CO2 Utilization
  • Polymers for Advanced Technologies
  • Industrial & Engineering Chemistry Research

Best Publications

  • Gas sorption, diffusion, and permeation in poly(dimethylsiloxane)

    T. C. Merkel;V. I. Bondar;K. Nagai;Benny D Freeman

  • Poly[1-(trimethylsilyl)-1-propyne] and related polymers: Synthesis, properties and functions

    Kazukiyo Nagai;Toshio Masuda;Tsutomu Nakagawa;Benny D. Freeman

  • Molecular design of hole transport materials for obtaining high durability in organic electroluminescent diodes

    Chihaya Adachi;Kazukiyo Nagai;Nozomu Tamoto

  • Electroluminescence of 1,3,4-Oxadiazole and Triphenylamine-Containing Molecules as an Emitter in Organic Multilayer Light Emitting Diodes

    Nozomu Tamoto;Chihaya Adachi;Chihaya Adachi;Kazukiyo Nagai

  • Analysis of dual-mode model parameters for gas sorption in glassy polymers

    Shinji Kanehashi;Kazukiyo Nagai

  • Sorption and transport of hydrocarbon and perfluorocarbon gases in poly(1-trimethylsilyl-1-propyne)

    T. C. Merkel;V. Bondar;K. Nagai;Benny D Freeman

  • Gas Sorption, Diffusion, and Permeation in Poly(2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole-co-tetrafluoroethylene)

    T. C. Merkel;V. Bondar;K. Nagai;Benny D Freeman

  • Effects of various liquid organic solvents on solvent-induced crystallization of amorphous poly(lactic acid) film

    Shuichi Sato;Daiki Gondo;Takayuki Wada;Shinji Kanehashi

  • Operating temperature effects on the plasticization of polyimide gas separation membranes

    Xavier Duthie;Sandra Kentish;Clem Powell;Kazukiyo Nagai;Kazukiyo Nagai

  • Effects of aging on the gas permeability and solubility in poly(1-trimethylsilyl-1-propyne) membranes synthesized with various catalysts

    Kazukiyo Nagai;Tsutomu Nakagawa

  • Gas permeability and stability of poly(1-trimethylsilyl-1-propyne-co-1-phenyl-1-propyne) membranes

    Kazukiyo Nagai;Akon Higuchi;Tsutomu Nakagawa

  • Silver-filled polyethersulfone membranes for antibacterial applications — Effect of PVP and TAP addition on silver dispersion

    H. Basri;H. Basri;Ahmad Fauzi Ismail;Madzlan Aziz;K. Nagai

  • Effect of polyethyleneglycol (PEG) on gas permeabilities and permselectivities in its cellulose acetate (CA) blend membranes

    Jintong Li;Shichang Wang;Kazukiyo Nagai;Tsutomu Nakagawa

  • Analysis of permeability; solubility and diffusivity of carbon dioxide; oxygen; and nitrogen in crystalline and liquid crystalline polymers

    Shinji Kanehashi;Akira Kusakabe;Shuichi Sato;Kazukiyo Nagai

  • Pure-Gas and Vapor Permeation and Sorption Properties of Poly[1-phenyl-2-[p-(trimethylsilyl)phenyl]acetylene] (PTMSDPA)

    L. G. Toy;K. Nagai;B. D. Freeman;I. Pinnau

  • Analysis of degradation mechanism of plasticized PVC under artificial aging conditions

    Mikiya Ito;Kazukiyo Nagai

  • CO2 separation properties of a glassy aromatic polyimide composite membranes containing high-content 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid

    Shinji Kanehashi;Masanori Kishida;Takashi Kidesaki;Ryohei Shindo

  • Polymer Membranes for Hydrogen Separations

    John D. Perry;Kazukiyo Nagai;William J. Koros

  • Characterization and gas transport properties of poly(lactic acid) blend membranes

    Tomomi Komatsuka;Akira Kusakabe;Kazukiyo Nagai

  • Effects of carbon dioxide-induced plasticization on the gas transport properties of glassy polyimide membranes

    Shinji Kanehashi;Tsutomu Nakagawa;Kazukiyo Nagai;Kazukiyo Nagai;Xavier Duthie

  • Hydrocarbon and Perfluorocarbon Gas Sorption in Poly(dimethylsiloxane), Poly(1-trimethylsilyl-1-propyne), and Copolymers of Tetrafluoroethylene and 2,2-Bis(trifluoromethyl)-4,5- difluoro-1,3-dioxole

    T. C. Merkel;V. Bondar;K. Nagai;B. D. Freeman

Frequent Co-Authors

Benny D. Freeman
Benny D. Freeman The University of Texas at Austin
Ingo Pinnau
Ingo Pinnau King Abdullah University of Science and Technology
Akon Higuchi
Akon Higuchi National Central University
Toshio Masuda
Toshio Masuda Kyoto University
Ahmad Fauzi Ismail
Ahmad Fauzi Ismail University of Technology Malaysia
Sandra E. Kentish
Sandra E. Kentish University of Melbourne
Joseph M. DeSimone
Joseph M. DeSimone Stanford University
Takeshi Matsuura
Takeshi Matsuura University of Ottawa
Anita J. Hill
Anita J. Hill Commonwealth Scientific and Industrial Research Organisation
Greg G. Qiao
Greg G. Qiao University of Melbourne

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