| Discipline name | D-Index | World Ranking | Current World Ranking | National Ranking | Current National Ranking | Publications | Citations |
|---|---|---|---|---|---|---|---|
| Materials Science | 104 | 889 | 847 | 8 | 8 | 767 | 36681 |
The chart shows the history of publications by Ahmad Umar between 2003 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ahmad Umar published across 23 years, from 2003 to 2025, averaging 42.4 papers a year. Output peaked at 91 publications in 2022. 108 of the 975 publications appeared in the last two years.
975 publications in total across all disciplines
| Year | Publications |
|---|---|
| 2003 | 1 |
| 2004 | 2 |
| 2005 | 6 |
| 2006 | 13 |
| 2007 | 10 |
| 2008 | 22 |
| 2009 | 25 |
| 2010 | 5 |
| 2011 | 61 |
| 2012 | 24 |
| 2013 | 44 |
| 2014 | 47 |
| 2015 | 75 |
| 2016 | 70 |
| 2017 | 63 |
| 2018 | 53 |
| 2019 | 46 |
| 2020 | 67 |
| 2021 | 74 |
| 2022 | 91 |
| 2023 | 68 |
| 2024 | 56 |
| 2025 | 52 |
| Total | 975 |
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 Ahmad Umar sits on this spectrum.
This scientist: 767 publications — 96th percentile
96% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 1,163 publications or more.
| Publications | Scientists | This scientist |
|---|---|---|
| 50–69 | 28 | |
| 70–89 | 152 | |
| 90–109 | 356 | |
| 110–129 | 487 | |
| 130–149 | 723 | |
| 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 | 767 |
| 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 |
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 Ahmad Umar sits on this spectrum.
This scientist: 104 D-Index — 93rd percentile
93% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 165 D-Index or more.
| 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 | |
| 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 | 104 |
| 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 |
Ahmad Umar is affiliated with Najran University in Saudi Arabia and has contributed extensively to research in the fields of Materials Science and Engineering. Their work spans numerous subfields, including Electrical and Electronic Engineering, Materials Chemistry, Biomedical Engineering, Renewable Energy, Sustainability and the Environment, and Polymers and Plastics.
Thematically, Umar's research focuses primarily on Gas Sensing Nanomaterials and Sensors, Electrochemical Sensors and Biosensors, Advanced Photocatalysis Techniques, Conducting Polymers and Applications, Supercapacitor Materials and Fabrication, Analytical Chemistry and Sensors, and ZnO Doping and Properties.
Recent significant publications reflect a diverse interest in nanomaterials and sensor technologies. These include:
Umar frequently publishes in specialized journals and venues that include:
Their collaborative network highlights regular co-authorship with several researchers, including:
Overall, Ahmad Umar's research portfolio demonstrates a continuous engagement with advancing materials and sensor sciences, contributing knowledge across a multidisciplinary spectrum focused on technological and environmental applications within materials science and engineering domains.
Rajesh Kumar;O. Al-Dossary;Girish Kumar;Ahmad Umar
Pin Hao;Zhenhuan Zhao;Jian Tian;Haidong Li
Houjuan Qi;Min Teng;Miao Liu;Shouxin Liu
Rajesh Kumar;Ahmad Umar;Girish Kumar;Hari Singh Nalwa
Yang Liu;Yang Jiao;Zhenglin Zhang;Fengyu Qu
Ahmad Umar;Mohammed Muzibur Rahman;Sang Hoon Kim;Yoon-Bong Hahn
Swati Sood;Ahmad Umar;Surinder Kumar Mehta;Sushil Kumar Kansal
Unknown
Q Ahsanulhaq;A Umar;Y B Hahn
Ahmad Umar;M.M. Rahman;Mohammad Vaseem;Yoon-Bong Hahn
Ahmad Umar
Ahmad Umar;Y B Hahn
A. Umar;S.H. Kim;Y.-S. Lee;K.S. Nahm
Qu Zhou;Qu Zhou;Wen Zeng;Weigen Chen;Lingna Xu
Hyo Joong Kim;Ji Wook Yoon;Kwon Il Choi;Ho Won Jang
Umar A;Karunagaran B;Suh Ek;Hahn Yb
Qu Zhou;Lingna Xu;Lingna Xu;Ahmad Umar;Weigen Chen
Yanshan Gao;Zhang Zhang;Jingwen Wu;Linhai Duan
Yuanhua Sang;Hong Liu;Ahmad Umar
Ramanpreet Kaur;Amandeep Kaur;Ahmad Umar;William A. Anderson
Yanshan Gao;Zhang Zhang;Jingwen Wu;Xianfeng Yi
Mohammad Vaseem;Ahmad Umar;Sang Hoon Kim;Yoon-Bong Hahn
Ahmad Umar;Ahmad Umar;M.M. Rahman;A. Al-Hajry;Y.-B. Hahn
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