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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 76 3206 3094 892 835 142 39115

Oomman K. Varghese publications per year

The chart shows the history of publications by Oomman K. Varghese between 1989 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Oomman K. Varghese published across 37 years, from 1989 to 2025, averaging 4.2 papers a year. Output peaked at 16 publications in 2008. 11 of the 154 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1989 to 2025. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 2008. 1989: 1 publication 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 2 publications 1999: 1 publication 2000: 1 publication 2001: 5 publications 2002: 4 publications 2003: 12 publications 2004: 9 publications 2005: 7 publications 2006: 13 publications 2007: 9 publications 2008: 16 publications 2009: 6 publications 2010: 9 publications 2011: 1 publication 2012: 3 publications 2013: 1 publication 2014: 1 publication 2015: 8 publications 2016: 6 publications 2017: 4 publications 2018: 6 publications 2019: 2 publications 2020: 6 publications 2021: 1 publication 2022: 4 publications 2023: 5 publications 2024: 7 publications 2025: 4 publications
1989 2025

154 publications in total across all disciplines

View publications per year as a table
Oomman K. Varghese: publications per year, 1989 to 2025
Year Publications
1989 1
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 0
1998 2
1999 1
2000 1
2001 5
2002 4
2003 12
2004 9
2005 7
2006 13
2007 9
2008 16
2009 6
2010 9
2011 1
2012 3
2013 1
2014 1
2015 8
2016 6
2017 4
2018 6
2019 2
2020 6
2021 1
2022 4
2023 5
2024 7
2025 4
Total 154
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Oomman K. Varghese 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 Oomman K. Varghese sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 130–149 publications, is where this scientist sits. 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
50–69 publications 1,163+

This scientist: 142 publications — 12th percentile

12% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723 142
150–169 835
170–189 850
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Oomman K. Varghese 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 Oomman K. Varghese sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 76–77 D-Index, is where this scientist sits. 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
40–41 D-Index 165+

This scientist: 76 D-Index — 75th percentile

75% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621
56–57 597
58–59 610
60–61 587
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323 76
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Oomman K. Varghese is affiliated with the University of Houston in the United States and has a research focus primarily situated in the fields of Materials Science and Engineering. Their work spans various subfields including Materials Chemistry, Renewable Energy, Sustainability and the Environment, Biomedical Engineering, Electrical and Electronic Engineering, and Polymers and Plastics.

Their research topics and contributions concentrate on areas such as:

  • Advanced Photocatalysis Techniques
  • Graphene Research and Applications
  • Advanced Sensor and Energy Harvesting Materials
  • Gas Sensing Nanomaterials and Sensors
  • Graphene and Nanomaterials Applications
  • Supercapacitor Materials and Fabrication
  • TiO2 Photocatalysis and Solar Cells

Varghese has published extensively in venues that include:

  • ECS Meeting Abstracts
  • ACS Applied Materials & Interfaces
  • Applied Physics Letters
  • Materials Advances
  • Solar Energy Materials and Solar Cells

Notable recent papers include:

  • "Nanoporous WO3 films synthesized by tuning anodization conditions for photoelectrochemical water oxidation" (2020, Solar Energy Materials and Solar Cells)
  • "Single-Step Synthesis of Nitrogen-Doped Graphene Oxide from Aniline at Ambient Conditions" (2022, ACS Applied Materials & Interfaces)
  • "Fabrication of Nano-Onion-Structured Graphene Films from Citrus sinensis Extract and Their Wetting and Sensing Characteristics" (2020, ACS Applied Materials & Interfaces)
  • "On the relevance of understanding and controlling the locations of dopants in hematite photoanodes for low-cost water splitting" (2021, Applied Physics Letters)
  • "Poly(octadecyl acrylate)-Grafted Multiwalled Carbon Nanotube Composites for Wearable Temperature Sensors" (2020, ACS Applied Nano Materials)

Frequent collaborators in Varghese's research include Maggie Paulose, Mohan V. Jacob, David Waligo, Lilly Schaffer, and Muhammad Adeel Zafar. These collaborations reflect sustained partnerships in related research areas.

Best Publications

  • Use of highly-ordered TiO(2) nanotube arrays in dye-sensitized solar cells.

    Gopal K. Mor;Karthik Shankar;Maggie Paulose;Oomman K. Varghese

  • Titanium oxide nanotube arrays prepared by anodic oxidation

    Dawei Gong;Craig A. Grimes;Oomman K. Varghese;Wenchong Hu

  • A review on highly ordered, vertically oriented TiO2 nanotube arrays: Fabrication, material properties, and solar energy applications

    Gopal K. Mor;Oomman K. Varghese;Maggie Paulose;Karthik Shankar

  • Toward Solar Fuels: Photocatalytic Conversion of Carbon Dioxide to Hydrocarbons

    Somnath C. Roy;Oomman K. Varghese;Maggie Paulose;Craig A. Grimes

  • Enhanced Photocleavage of Water Using Titania Nanotube Arrays

    Gopal K. Mor;Karthik Shankar;Maggie Paulose;Oomman K. Varghese

  • Vertically aligned single crystal TiO2 nanowire arrays grown directly on transparent conducting oxide coated glass: synthesis details and applications

    Xinjian Feng;Karthik Shankar;Oomman K Varghese;Maggie Paulose

  • High-Rate Solar Photocatalytic Conversion of CO2 and Water Vapor to Hydrocarbon Fuels

    Oomman K. Varghese;Maggie Paulose;Thomas J. LaTempa;Craig A. Grimes

  • Anodic Growth of Highly Ordered TiO2 Nanotube Arrays to 134 μm in Length

    Maggie Paulose;Karthik Shankar;Sorachon Yoriya;Haripriya E. Prakasam

  • Hydrogen sensing using titania nanotubes

    Oomman K. Varghese;Dawei Gong;Maggie Paulose;Keat G. Ong

  • Highly-ordered TiO2 nanotube arrays up to 220 µm in length: use in water photoelectrolysis and dye-sensitized solar cells

    Karthik Shankar;Gopal K Mor;Haripriya E Prakasam;Sorachon Yoriya

  • Recent Advances in the Use of TiO2 Nanotube and Nanowire Arrays for Oxidative Photoelectrochemistry

    Karthik Shankar;James I. Basham;Nageh K. Allam;Oomman K. Varghese

  • Crystallization and high-temperature structural stability of titanium oxide nanotube arrays

    Oomman K. Varghese;Dawei Gong;Maggie Paulose;Craig A. Grimes

  • Long vertically aligned titania nanotubes on transparent conducting oxide for highly efficient solar cells.

    Oomman K. Varghese;Maggie Paulose;Craig A. Grimes

  • Extreme Changes in the Electrical Resistance of Titania Nanotubes with Hydrogen Exposure

    Oomman K. Varghese;Dawei Gong;Maggie Paulose;Keat G. Ong

  • The Effect of Electrolyte Composition on the Fabrication of Self-Organized Titanium Oxide Nanotube Arrays by Anodic Oxidation

    Qingyun Cai;Maggie Paulose;Oomman K. Varghese;Craig A. Grimes

  • A new benchmark for TiO2 nanotube array growth by anodization

    Haripriya E. Prakasam;Karthik Shankar;Maggie Paulose;Oomman K. Varghese

  • Gas sensing characteristics of multi-wall carbon nanotubes

    O.K. Varghese;P.D. Kichambre;D. Gong;K.G. Ong

  • Fabrication of tapered, conical-shaped titania nanotubes

    G.K. Mor;Oomman K. Varghese;Maggie Paulose;Niloy Mukherjee

  • TiO2 Nanotube Arrays of 1000 μm Length by Anodization of Titanium Foil: Phenol Red Diffusion

    Maggie Paulose;Haripriya E. Prakasam;Oomman K. Varghese;Lily Peng

  • Transparent Highly Ordered TiO2 Nanotube Arrays via Anodization of Titanium Thin Films

    Gopal K. Mor;Oomman K. Varghese;Maggie Paulose;Craig A. Grimes

Frequent Co-Authors

Craig A. Grimes
Craig A. Grimes Pennsylvania State University
Maggie Paulose
Maggie Paulose University of Houston
Gopal K. Mor
Gopal K. Mor Pennsylvania State University
Karthik Shankar
Karthik Shankar University of Alberta
Keat Ghee Ong
Keat Ghee Ong University of Oregon
Elizabeth C. Dickey
Elizabeth C. Dickey Carnegie Mellon University
Chandra Sekhar Tiwary
Chandra Sekhar Tiwary Indian Institute of Technology Kharagpur
Shuo Chen
Shuo Chen University of Houston
Ching-Wu Chu
Ching-Wu Chu Lawrence Berkeley National Laboratory
Pulickel M. Ajayan
Pulickel M. Ajayan Rice University

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