Citation Rankings
Highly Cited Researchers
Nnamdi Azikiwe University Highly Cited Researchers Citation Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Chemical Engineering
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,124
10,106
0.998
* Total Citation Counts Rankings
Ranking Based On Selection :2
Biopharmaceutics
Pharmaceutical Microbiology
Biotechnology
Nanomedicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,242
3,682
0.508
* Total Citation Counts Rankings
Ranking Based On Selection :3
Old age Mental Health
Psychotherapy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,982
3,461
0.496
* Total Citation Counts Rankings
Ranking Based On Selection :4
Surgical oncology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,813
3,072
0.451
* Total Citation Counts Rankings
Ranking Based On Selection :5
Kinetics and catalysis
composite Studies
Adsorption/Coagulation Studies
Corrosion
Bioenergy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,035
4,878
0.808
* Total Citation Counts Rankings
Ranking Based On Selection :6
Polymer Nanocomposites
Hybrid Bionanocomposites
Fire Retardancy
Engineering Textiles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,044
4,921
0.976
* Total Citation Counts Rankings
Ranking Based On Selection :7
Gynecological Endoscopy
Infertility & Assisted Reproduction
PMTCT.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,900
3,134
0.640
* Total Citation Counts Rankings
Ranking Based On Selection :8
Wastewater Treatment
Biomass Conversion
Biogas
Modeling &Optimization
Chemical Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,770
4,696
0.984
* Total Citation Counts Rankings
Ranking Based On Selection :9
Mycology and Plant Pathology
Plant Microbiology
Biological Control
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,081
1,601
0.392
* Total Citation Counts Rankings
Ranking Based On Selection :10
Natural Products Medicinal Chemistry and Drug Discovery
Organic Spectroscopy
Pharmaceutical Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,106
1,906
0.614
* Total Citation Counts Rankings
Ranking Based On Selection :11
Probiotic Microbiology
Human Microbiome
Laboratory Diagnostics
Forensic DNA Analysis
Human genomics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,018
1,127
0.373
* Total Citation Counts Rankings
Ranking Based On Selection :12
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,811
2,230
0.793
* Total Citation Counts Rankings
Ranking Based On Selection :13
Preterm birth
Premature Rupture of membranes
Gynae-oncology
Evidence based Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,803
2,093
0.747
* Total Citation Counts Rankings
Ranking Based On Selection :14
Audit
Forensic Audit
Fraud
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,469
1,744
0.706
* Total Citation Counts Rankings
Ranking Based On Selection :15
Environmental Chemical Engineering
Raw materials processing and utilization
Biomass energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,420
1,831
0.757
* Total Citation Counts Rankings
Ranking Based On Selection :16
Sexual and Reproductive health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,086
747
0.358
* Total Citation Counts Rankings
Ranking Based On Selection :17
EPIDEMIOLOGY of Chronic diseases
Epidemiology of infectious diseases
MCH/Adolescent epidemiology
Environmental/Pharmaco-epide
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,614
1,029
0.638
* Total Citation Counts Rankings
Ranking Based On Selection :18
Endoscopy
Oncology
Fetomaternal medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,608
1,258
0.782
* Total Citation Counts Rankings
Ranking Based On Selection :19
Financial Accounting & Auditing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,574
1,349
0.857
* Total Citation Counts Rankings
Ranking Based On Selection :20
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,565
929
0.594
* Total Citation Counts Rankings
Ranking Based On Selection :21
Financial Reporting
Corporate Governance
Sustainability Reporting
Bankruptcy
Fraud Detection
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
1,333
0.864
* Total Citation Counts Rankings
Ranking Based On Selection :22
Environmental/Heavy Metal Toxicology
Reproductive Toxicology
Risk Assessment
Pharmacokinetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,517
509
0.336
* Total Citation Counts Rankings
Ranking Based On Selection :23
Fine particle technology
blood-HIV interactions
surface thermodynamics
mechanical vibrations
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,476
254
0.172
* Total Citation Counts Rankings
Ranking Based On Selection :24
Marketing
Entrepreneurship
Nigeria
Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,422
892
0.627
* Total Citation Counts Rankings
Ranking Based On Selection :25
Vaccinology and Immunology
Viral and Bacterial Infections
Antimicrobial resistance
Pharm Quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,420
1,159
0.816
* Total Citation Counts Rankings
Rankings
94,443
42
1
Ranking Based On Selection: 1
Joshua O. Ighalo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,124
10,106
0.998
Chemical Engineering
Environmental Engineering
* Total Citation Counts Rankings
Rankings
137,374
71
2
Ranking Based On Selection: 2
Charles O Esimone
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,242
3,682
0.508
Biopharmaceutics
Pharmaceutical Microbiology
Biotechnology
Nanomedicine
* Total Citation Counts Rankings
Rankings
142,824
76
3
Ranking Based On Selection: 3
Richard Uwakwe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,982
3,461
0.496
Old age Mental Health
Psychotherapy
* Total Citation Counts Rankings
Rankings
146,524
80
4
Ranking Based On Selection: 4
Stanley Anyanwu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,813
3,072
0.451
* Total Citation Counts Rankings
Rankings
165,943
106
5
Ranking Based On Selection: 5
Okechukwu Domnic Onukwuli
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,035
4,878
0.808
Kinetics and catalysis
composite Studies
Adsorption/Coagulation Studies
Corrosion
Bioenergy
* Total Citation Counts Rankings
Rankings
197,795
146
6
Ranking Based On Selection: 6
Christopher Igwe Idumah
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,044
4,921
0.976
Polymer Nanocomposites
Hybrid Bionanocomposites
Fire Retardancy
Engineering Textiles
* Total Citation Counts Rankings
Rankings
203,471
157
7
Ranking Based On Selection: 7
Joseph Ikechebelu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,900
3,134
0.640
Gynecological Endoscopy
Infertility & Assisted Reproduction
PMTCT.
* Total Citation Counts Rankings
Rankings
208,798
165
8
Ranking Based On Selection: 8
Chinenye Adaobi Igwegbe (Nee Onyechi)|Chinenye Adaobi Onyechi, Chinenye Adaobi Igwegb, C. A. Igwegbe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,770
4,696
0.984
Wastewater Treatment
Biomass Conversion
Biogas
Modeling &Optimization
Chemical Engineering
* Total Citation Counts Rankings
Rankings
241,428
211
9
Ranking Based On Selection: 9
Raphael N Okigbo|R N Okigbo, Raphael Nnajiofor Okigbo, N Okigbo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,081
1,601
0.392
Mycology and Plant Pathology
Plant Microbiology
Biological Control
* Total Citation Counts Rankings
Rankings
305,892
341
10
Ranking Based On Selection: 10
Festus Basden Chiedu Okoye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,106
1,906
0.614
Natural Products Medicinal Chemistry and Drug Discovery
Organic Spectroscopy
Pharmaceutical Biotechnology
* Total Citation Counts Rankings
Rankings
313,357
354
11
Ranking Based On Selection: 11
Kingsley C Anukam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,018
1,127
0.373
Probiotic Microbiology
Human Microbiome
Laboratory Diagnostics
Forensic DNA Analysis
Human genomics
* Total Citation Counts Rankings
Rankings
331,970
403
12
Ranking Based On Selection: 12
Matthew Chukwudi Menkiti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,811
2,230
0.793
* Total Citation Counts Rankings
Rankings
332,779
405
13
Ranking Based On Selection: 13
George Eleje
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,803
2,093
0.747
Preterm birth
Premature Rupture of membranes
Gynae-oncology
Evidence based Medicine
* Total Citation Counts Rankings
Rankings
368,013
516
14
Ranking Based On Selection: 14
Emmanuel Ikechuckwu Okoye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,469
1,744
0.706
* Total Citation Counts Rankings
Rankings
373,707
537
15
Ranking Based On Selection: 15
Joseph Tagbo Nwabanne
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,420
1,831
0.757
Environmental Chemical Engineering
Raw materials processing and utilization
Biomass energy
* Total Citation Counts Rankings
Rankings
417,502
660
16
Ranking Based On Selection: 16
Joseph Adinma
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,086
747
0.358
Sexual and Reproductive health
* Total Citation Counts Rankings
Rankings
499,661
1,006
17
Ranking Based On Selection: 17
Prosper Obunikem Uchechukwu Adogu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,614
1,029
0.638
EPIDEMIOLOGY of Chronic diseases
Epidemiology of infectious diseases
MCH/Adolescent epidemiology
Environmental/Pharmaco-epide
* Total Citation Counts Rankings
Rankings
500,873
1,016
18
Ranking Based On Selection: 18
Onwusulu, Daniel Nnaemeka
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,608
1,258
0.782
* Total Citation Counts Rankings
Rankings
507,963
1,045
19
Ranking Based On Selection: 19
Raymond Ezejiofor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,574
1,349
0.857
Financial Accounting & Auditing
* Total Citation Counts Rankings
Rankings
510,008
1,058
20
Ranking Based On Selection: 20
John K Nduka
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,565
929
0.594
* Total Citation Counts Rankings
Rankings
514,803
1,083
21
Ranking Based On Selection: 21
Chinedu Francis Egbunike
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
1,333
0.864
Financial Reporting
Corporate Governance
Sustainability Reporting
Bankruptcy
Fraud Detection
* Total Citation Counts Rankings
Rankings
520,701
1,104
22
Ranking Based On Selection: 22
Onyenmechi Johnson Afonne
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,517
509
0.336
Environmental/Heavy Metal Toxicology
Reproductive Toxicology
Risk Assessment
Pharmacokinetics
* Total Citation Counts Rankings
Rankings
529,908
1,147
23
Ranking Based On Selection: 23
Sam Nna Omenyi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,476
254
0.172
Fine particle technology
blood-HIV interactions
surface thermodynamics
mechanical vibrations
* Total Citation Counts Rankings
Rankings
542,228
1,219
24
Ranking Based On Selection: 24
Anayo Dominic Nkamnebe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,422
892
0.627
Marketing
Entrepreneurship
Nigeria
Africa
* Total Citation Counts Rankings
Rankings
542,679
1,224
25
Ranking Based On Selection: 25
Angus Nnamdi Oli
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,420
1,159
0.816
Vaccinology and Immunology
Viral and Bacterial Infections
Antimicrobial resistance
Pharm Quality