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Chemistry
Turkey
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 79 3708 3364 10 9 308 17310

Saim Özkar publications per year

The chart shows the history of publications by Saim Özkar between 1975 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Saim Özkar published across 51 years, from 1975 to 2025, averaging 6.2 papers a year. Output peaked at 23 publications in 2009. 8 of the 315 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1975 to 2025. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2009. 1975: 1 publication 1976: 1 publication 1977: 1 publication 1978: 1 publication 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 1 publication 1983: 4 publications 1984: 0 publications 1985: 2 publications 1986: 3 publications 1987: 1 publication 1988: 1 publication 1989: 1 publication 1990: 6 publications 1991: 7 publications 1992: 12 publications 1993: 5 publications 1994: 5 publications 1995: 2 publications 1996: 2 publications 1997: 6 publications 1998: 5 publications 1999: 6 publications 2000: 2 publications 2001: 7 publications 2002: 3 publications 2003: 4 publications 2004: 4 publications 2005: 4 publications 2006: 8 publications 2007: 8 publications 2008: 4 publications 2009: 23 publications 2010: 20 publications 2011: 23 publications 2012: 18 publications 2013: 11 publications 2014: 14 publications 2015: 10 publications 2016: 11 publications 2017: 17 publications 2018: 12 publications 2019: 9 publications 2020: 7 publications 2021: 8 publications 2022: 3 publications 2023: 4 publications 2024: 4 publications 2025: 4 publications
1975 2025

315 publications in total across all disciplines

View publications per year as a table
Saim Özkar: publications per year, 1975 to 2025
Year Publications
1975 1
1976 1
1977 1
1978 1
1979 0
1980 0
1981 0
1982 1
1983 4
1984 0
1985 2
1986 3
1987 1
1988 1
1989 1
1990 6
1991 7
1992 12
1993 5
1994 5
1995 2
1996 2
1997 6
1998 5
1999 6
2000 2
2001 7
2002 3
2003 4
2004 4
2005 4
2006 8
2007 8
2008 4
2009 23
2010 20
2011 23
2012 18
2013 11
2014 14
2015 10
2016 11
2017 17
2018 12
2019 9
2020 7
2021 8
2022 3
2023 4
2024 4
2025 4
Total 315
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Saim Özkar publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Saim Özkar sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 301–320 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 308 publications — 65th percentile

65% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764 308
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Saim Özkar D-index placement in Chemistry in 2026

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

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 78–79 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 79 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388 79
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Research.com Recognitions

  • 2026 - Research.com Chemistry in Turkey Leader Award
  • 2025 - Research.com Chemistry in Turkey Leader Award
  • 2022 - Research.com Chemistry in Turkey Leader Award
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry

Overview

Saim Özkar is affiliated with Middle East Technical University in Turkey and has contributed extensively to the fields of Materials Science, Chemical Engineering, and Energy. Their research spans several specific subfields including Materials Chemistry, Catalysis, Energy Engineering and Power Technology, Renewable Energy, Sustainability and the Environment, and Atmospheric Science.

The research topics covered by Özkar include:

  • Hydrogen Storage and Materials
  • Ammonia Synthesis and Nitrogen Reduction
  • Hybrid Renewable Energy Systems
  • Nanoparticles nucleation surface interactions
  • Boron and Carbon Nanomaterials Research
  • Coagulation and Flocculation Studies
  • Advanced battery technologies research

Among recent publications authored or co-authored by Özkar are:

  • "LaMer's 1950 model of particle formation: a review and critical analysis of its classical nucleation and fluctuation theory basis, of competing models and mechanisms for phase-changes and particle formation, and then of its application to silver halide, semiconductor, metal, and metal-oxide nanoparticles" (2020), published in Materials Advances
  • "Cobalt ferrite supported platinum nanoparticles: Superb catalytic activity and outstanding reusability in hydrogen generation from the hydrolysis of ammonia borane" (2021), Journal of Colloid and Interface Science
  • "Magnetically Separable Rh0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane" (2020), ACS Sustainable Chemistry & Engineering
  • "Magnetically Isolable Pt0/Co3O4 Nanocatalysts: Outstanding Catalytic Activity and High Reusability in Hydrolytic Dehydrogenation of Ammonia Borane" (2021), ACS Applied Materials & Interfaces
  • "A review on platinum(0) nanocatalysts for hydrogen generation from the hydrolysis of ammonia borane" (2021), Dalton Transactions

Özkar has published predominantly in several key academic journals, including:

  • International Journal of Hydrogen Energy
  • SSRN Electronic Journal
  • Journal of Colloid and Interface Science
  • The Journal of Physical Chemistry C
  • Journal of Alloys and Compounds

Frequent collaborators include:

  • Serdar Akbayrak
  • Richard G. Finke
  • Yalçın Tonbul
  • Gülhan Çakmak
  • Tayfur Öztürk

The scientist has been recognized by The Science Academy Society of Turkey - Bilim Akademisi for contributions in chemistry.

Best Publications

  • Monodisperse nickel nanoparticles and their catalysis in hydrolytic dehydrogenation of ammonia borane.

    Oender Metin;Vismadeb Mazumder;Saim Ozkar;Shouheng Sun

  • Nanocluster Formation and Stabilization Fundamental Studies: Ranking Commonly Employed Anionic Stabilizers via the Development, Then Application, of Five Comparative Criteria

    Saim Ozkar;Richard G Finke

  • Metal nanoparticles in liquid phase catalysis; from recent advances to future goals

    Mehmet Zahmakıran;Saim Özkar

  • Hydrogen generation from hydrolysis of sodium borohydride using Ru(0) nanoclusters as catalyst

    Saim Ozkar;M Zahmakiran

  • Water-soluble poly(4-styrenesulfonic acid-co-maleic acid) stabilized ruthenium(0) and palladium(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia–borane

    Önder Metin;Şule Şahin;Saim Özkar

  • Ammonia borane as hydrogen storage materials

    Serdar Akbayrak;Saim Özkar

  • Ceria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane

    Serdar Akbayrak;Yalçın Tonbul;Yalçın Tonbul;Saim Özkar

  • Hydrogen Generation from the Hydrolysis of Ammonia-borane and Sodium Borohydride Using Water-soluble Polymer-stabilized Cobalt(0) Nanoclusters Catalyst

    Önder Metin;Saim Özkar

  • LaMer’s 1950 Model for Particle Formation ofInstantaneous Nucleation and Diffusion-Controlled Growth: A HistoricalLook at the Model’s Origins, Assumptions, Equations, and UnderlyingSulfur Sol Formation Kinetics Data

    Christopher B. Whitehead;Saim Özkar;Richard G. Finke

  • Ruthenium(0) nanoparticles supported on multiwalled carbon nanotube as highly active catalyst for hydrogen generation from ammonia-borane.

    Serdar Akbayrak;Saim Özkar

  • Is it homogeneous or heterogeneous catalysis derived from [RhCp*Cl2]2? In operando XAFS, kinetic, and crucial kinetic poisoning evidence for subnanometer Rh4 cluster-based benzene hydrogenation catalysis.

    Ercan Bayram;John C. Linehan;John L. Fulton;John A. S. Roberts

  • Ruthenium(0) nanoclusters stabilized by a Nanozeolite framework: isolable, reusable, and green catalyst for the hydrogenation of neat aromatics under mild conditions with the unprecedented catalytic activity and lifetime.

    Mehmet Zahmakıran;Yalçın Tonbul;Saim Özkar

  • Water soluble laurate-stabilized ruthenium(0) nanoclusters catalyst for hydrogen generation from the hydrolysis of ammonia-borane: High activity and long lifetime

    Feyyaz Durap;Mehmet Zahmakıran;Saim Özkar

  • Palladium(0) nanoparticles supported on polydopamine coated CoFe2O4 as highly active, magnetically isolable and reusable catalyst for hydrogen generation from the hydrolysis of ammonia borane

    Joydev Manna;Serdar Akbayrak;Saim Özkar

  • Analysis of Nanoparticle Transmission Electron Microscopy Data Using a Public- Domain Image-Processing Program, Image

    Gerd H. Woehrle;James E. Hutchison;Saim Özkar;Richard G. Finke

  • Zeolite framework stabilized rhodium(0) nanoclusters catalyst for the hydrolysis of ammonia-borane in air: Outstanding catalytic activity, reusability and lifetime

    Mehmet Zahmakıran;Saim Özkar

  • Zeolite-confined ruthenium(0) nanoclusters catalyst: record catalytic activity, reusability, and lifetime in hydrogen generation from the hydrolysis of sodium borohydride.

    Mehmet Zahmakiran;Saim Özkar

  • Facile Synthesis of Three-Dimensional Pt-TiO2 Nano-networks: A Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia–Borane

    Mohammad Aref Khalily;Hamit Eren;Serdar Akbayrak;Hepi Hari Susapto

  • Hydroxyapatite-supported cobalt(0) nanoclusters as efficient and cost-effective catalyst for hydrogen generation from the hydrolysis of both sodium borohydride and ammonia-borane

    Murat Rakap;Saim Özkar

  • Water soluble nickel(0) and cobalt(0) nanoclusters stabilized by poly(4-styrenesulfonic acid-co-maleic acid): Highly active, durable and cost effective catalysts in hydrogen generation from the hydrolysis of ammonia borane

    Önder Metin;Saim Özkar

Frequent Co-Authors

Mehmet Zahmakiran
Mehmet Zahmakiran Bartin University
Richard G. Finke
Richard G. Finke Colorado State University
Önder Metin
Önder Metin Koç University
Geoffrey A. Ozin
Geoffrey A. Ozin University of Toronto
Inci Eroglu
Inci Eroglu Middle East Technical University
Mojtaba Bagherzadeh
Mojtaba Bagherzadeh Sharif University of Technology
Bruno Chaudret
Bruno Chaudret Paul Sabatier University
Karine Philippot
Karine Philippot Federal University of Toulouse Midi-Pyrénées
Judith C. Yang
Judith C. Yang Brookhaven National Laboratory
Anatoly I. Frenkel
Anatoly I. Frenkel Stony Brook University

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