Citation Rankings
Highly Cited Researchers
Highly Cited Researchers Citation Rankings 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the 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
Environmental Sustainability
GHGs Utilization
Nanomaterials
Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,040
11,018
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
7,402
3,831
0.518
* Total Citation Counts Rankings
Ranking Based On Selection :3
Old age Mental Health
Psychotherapy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,135
3,601
0.505
* Total Citation Counts Rankings
Ranking Based On Selection :4
Surgical oncology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,931
3,180
0.459
* 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
6,433
5,268
0.819
* 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
5,258
5,130
0.976
* Total Citation Counts Rankings
Ranking Based On Selection :7
Wastewater treatment
Biomass
Biogas
Modeling and Optimization
Chemical Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,249
5,174
0.986
* Total Citation Counts Rankings
Ranking Based On Selection :8
Gynecological Endoscopy
Infertility & Assisted Reproduction
PMTCT.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,075
3,294
0.649
* Total Citation Counts Rankings
Ranking Based On Selection :9
Mycology and Plant Pathology
Phytomedicine
Plant Microbiology
Aquatic Botany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,194
1,697
0.405
* 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
3,190
1,985
0.622
* 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
3,060
1,161
0.379
* Total Citation Counts Rankings
Ranking Based On Selection :12
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,979
2,390
0.802
* 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
2,963
2,255
0.761
* Total Citation Counts Rankings
Ranking Based On Selection :14
Environmental Chemical Engineering
Raw materials processing and utilization
Biomass energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,585
1,987
0.769
* Total Citation Counts Rankings
Ranking Based On Selection :15
Audit
Forensic Audit
Fraud
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,585
1,856
0.718
* Total Citation Counts Rankings
Ranking Based On Selection :16
Sexual and Reproductive health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,146
785
0.366
* 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
1,710
1,114
0.651
* Total Citation Counts Rankings
Ranking Based On Selection :18
Endoscopy
Oncology
Fetomaternal medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,667
1,311
0.786
* Total Citation Counts Rankings
Ranking Based On Selection :19
Haematology
Oncology
Endocrinology
Public Health
Artificial Intelligence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,660
1,650
0.994
* Total Citation Counts Rankings
Ranking Based On Selection :20
Financial Accounting & Auditing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,660
1,435
0.864
* 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
1,657
1,443
0.871
* Total Citation Counts Rankings
Ranking Based On Selection :22
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,610
969
0.602
* Total Citation Counts Rankings
Ranking Based On Selection :23
Environmental/Heavy Metal Toxicology
Reproductive Toxicology
Risk Assessment
Pharmacokinetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
535
0.347
* Total Citation Counts Rankings
Ranking Based On Selection :24
Vaccinology and Immunology
Viral and Bacterial Infections
Antimicrobial resistance
Pharm Quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,533
1,271
0.829
* Total Citation Counts Rankings
Ranking Based On Selection :25
Fine particle technology
blood-HIV interactions
surface thermodynamics
mechanical vibrations
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,497
274
0.183
* Total Citation Counts Rankings
Rankings
87,773
39
1
Ranking Based On Selection: 1
Joshua O. Ighalo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,040
11,018
0.998
Environmental Sustainability
GHGs Utilization
Nanomaterials
Catalysis
* Total Citation Counts Rankings
Rankings
137,897
73
2
Ranking Based On Selection: 2
Charles O Esimone
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,402
3,831
0.518
Biopharmaceutics
Pharmaceutical Microbiology
Biotechnology
Nanomedicine
* Total Citation Counts Rankings
Rankings
143,432
80
3
Ranking Based On Selection: 3
Richard Uwakwe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,135
3,601
0.505
Old age Mental Health
Psychotherapy
* Total Citation Counts Rankings
Rankings
147,823
84
4
Ranking Based On Selection: 4
Stanley Anyanwu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,931
3,180
0.459
* Total Citation Counts Rankings
Rankings
159,631
97
5
Ranking Based On Selection: 5
Okechukwu Domnic Onukwuli
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,433
5,268
0.819
Kinetics and catalysis
composite Studies
Adsorption/Coagulation Studies
Corrosion
Bioenergy
* Total Citation Counts Rankings
Rankings
195,112
147
6
Ranking Based On Selection: 6
Christopher Igwe Idumah
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,258
5,130
0.976
Polymer Nanocomposites
Hybrid Bionanocomposites
Fire Retardancy
Engineering Textiles
* Total Citation Counts Rankings
Rankings
195,436
148
7
Ranking Based On Selection: 7
Chinenye Adaobi Igwegbe (Nee Onyechi)|Chinenye Adaobi Onyechi, Chinenye Adaobi Igwegb, C. A. Igwegbe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,249
5,174
0.986
Wastewater treatment
Biomass
Biogas
Modeling and Optimization
Chemical Engineering
* Total Citation Counts Rankings
Rankings
201,873
159
8
Ranking Based On Selection: 8
Joseph Ikechebelu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,075
3,294
0.649
Gynecological Endoscopy
Infertility & Assisted Reproduction
PMTCT.
* Total Citation Counts Rankings
Rankings
241,683
216
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
4,194
1,697
0.405
Mycology and Plant Pathology
Phytomedicine
Plant Microbiology
Aquatic Botany
* Total Citation Counts Rankings
Rankings
306,700
347
10
Ranking Based On Selection: 10
Festus Basden Chiedu Okoye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,190
1,985
0.622
Natural Products Medicinal Chemistry and Drug Discovery
Organic Spectroscopy
Pharmaceutical Biotechnology
* Total Citation Counts Rankings
Rankings
317,550
377
11
Ranking Based On Selection: 11
Kingsley C Anukam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,060
1,161
0.379
Probiotic Microbiology
Human Microbiome
Laboratory Diagnostics
Forensic DNA Analysis
Human genomics
* Total Citation Counts Rankings
Rankings
324,610
399
12
Ranking Based On Selection: 12
Matthew Chukwudi Menkiti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,979
2,390
0.802
* Total Citation Counts Rankings
Rankings
326,050
403
13
Ranking Based On Selection: 13
George Eleje
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,963
2,255
0.761
Preterm birth
Premature Rupture of membranes
Gynae-oncology
Evidence based Medicine
* Total Citation Counts Rankings
Rankings
363,813
511
14
Ranking Based On Selection: 14
Joseph Tagbo Nwabanne
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,585
1,987
0.769
Environmental Chemical Engineering
Raw materials processing and utilization
Biomass energy
* Total Citation Counts Rankings
Rankings
363,821
512
15
Ranking Based On Selection: 15
Emmanuel Ikechuckwu Okoye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,585
1,856
0.718
* Total Citation Counts Rankings
Rankings
418,532
674
16
Ranking Based On Selection: 16
Joseph Adinma
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,146
785
0.366
Sexual and Reproductive health
* Total Citation Counts Rankings
Rankings
491,278
990
17
Ranking Based On Selection: 17
Prosper Obunikem Uchechukwu Adogu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,710
1,114
0.651
EPIDEMIOLOGY of Chronic diseases
Epidemiology of infectious diseases
MCH/Adolescent epidemiology
Environmental/Pharmaco-epide
* Total Citation Counts Rankings
Rankings
499,845
1,023
18
Ranking Based On Selection: 18
Onwusulu, Daniel Nnaemeka
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,667
1,311
0.786
* Total Citation Counts Rankings
Rankings
501,208
1,029
19
Ranking Based On Selection: 19
Chisom A Nri-Ezedi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,660
1,650
0.994
Haematology
Oncology
Endocrinology
Public Health
Artificial Intelligence
* Total Citation Counts Rankings
Rankings
501,235
1,031
20
Ranking Based On Selection: 20
Raymond Ezejiofor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,660
1,435
0.864
Financial Accounting & Auditing
* Total Citation Counts Rankings
Rankings
501,866
1,033
21
Ranking Based On Selection: 21
Chinedu Francis Egbunike
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,657
1,443
0.871
Financial Reporting
Corporate Governance
Sustainability Reporting
Bankruptcy
Fraud Detection
* Total Citation Counts Rankings
Rankings
511,634
1,074
22
Ranking Based On Selection: 22
John K Nduka
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,610
969
0.602
* Total Citation Counts Rankings
Rankings
526,028
1,139
23
Ranking Based On Selection: 23
Onyenmechi Johnson Afonne
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
535
0.347
Environmental/Heavy Metal Toxicology
Reproductive Toxicology
Risk Assessment
Pharmacokinetics
* Total Citation Counts Rankings
Rankings
528,096
1,157
24
Ranking Based On Selection: 24
Angus Nnamdi Oli
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,533
1,271
0.829
Vaccinology and Immunology
Viral and Bacterial Infections
Antimicrobial resistance
Pharm Quality
* Total Citation Counts Rankings
Rankings
536,288
1,211
25
Ranking Based On Selection: 25
Sam Nna Omenyi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,497
274
0.183
Fine particle technology
blood-HIV interactions
surface thermodynamics
mechanical vibrations