Citation Rankings
Highly Cited Researchers
Natural Sciences / Chemical Sciences Highly Cited Researchers 533 Scientists Citation in South Africa Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list 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: 26
Nanoscience
Materials Chemistry
Semiconductors...
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,861
3,852
0.490
* Total Citation Counts Rankings
Ranking Based On Selection: 27
adsorption
water purification
catalysis
electrochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,682
3,440
0.448
* Total Citation Counts Rankings
Ranking Based On Selection: 28
Phytochemistry
Nutraceuticals
Natural Product Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,571
6,908
0.912
* Total Citation Counts Rankings
Ranking Based On Selection: 29
Crystallography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,051
826
0.117
* Total Citation Counts Rankings
Ranking Based On Selection: 30
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,493
2,740
0.422
* Total Citation Counts Rankings
Ranking Based On Selection: 31
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,440
1,627
0.253
* Total Citation Counts Rankings
Ranking Based On Selection: 32
Environmental Analytical Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,421
2,567
0.400
* Total Citation Counts Rankings
Ranking Based On Selection: 33
Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,360
1,920
0.302
* Total Citation Counts Rankings
Ranking Based On Selection: 34
Chemistry
Natural Product Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,262
1,973
0.315
* Total Citation Counts Rankings
Ranking Based On Selection: 35
Polymers
Organic chemistry
Coating
Corrosion
Nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,020
5,805
0.964
* Total Citation Counts Rankings
Ranking Based On Selection: 36
Sol-Gel Technology
Nanomaterials
Ceramics and Water Treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,828
3,248
0.557
* Total Citation Counts Rankings
Ranking Based On Selection: 37
Climate Change
Atmospheric chemistry
Marine atmosphere
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,783
2,105
0.364
* Total Citation Counts Rankings
Ranking Based On Selection: 38
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,733
2,346
0.409
* Total Citation Counts Rankings
Ranking Based On Selection: 39
Natural products chemistry
Essential oil
Biological activities
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,729
2,824
0.493
* Total Citation Counts Rankings
Ranking Based On Selection: 40
Forest Pathology
mycology
population genetics
fungal taxonomy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,470
3,221
0.589
* Total Citation Counts Rankings
Ranking Based On Selection: 41
natural products chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,392
2,804
0.520
* Total Citation Counts Rankings
Ranking Based On Selection: 42
coal
UCG
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,316
2,005
0.377
* Total Citation Counts Rankings
Ranking Based On Selection: 43
Medicinal Chemistry/Ethnophamarcology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,312
2,641
0.497
* Total Citation Counts Rankings
Ranking Based On Selection: 44
Structure-based drug design
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,302
1,215
0.229
* Total Citation Counts Rankings
Ranking Based On Selection: 45
Platinum group metals chemistry. Multinuclear NMR
photochemistry of coordination compounds
Isotope effects in NMR
acylthioure
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,281
1,040
0.197
* Total Citation Counts Rankings
Ranking Based On Selection: 46
chemistry
analytical chemistry
chromatography
mass spectrometry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,206
1,724
0.331
* Total Citation Counts Rankings
Ranking Based On Selection: 47
coordination chemistry
reaction mechanisms
crystallography
catalysis
radiopharmacy models
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,197
1,026
0.197
* Total Citation Counts Rankings
Ranking Based On Selection: 48
Organic synthesis
Medicinal chemistry
Bioactive small molecules
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,187
1,687
0.325
* Total Citation Counts Rankings
Ranking Based On Selection: 49
Air Quality
Climate Change
Atmospheric Chemistry
Metallurgy
Pyrometallurgy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,165
2,779
0.538
* Total Citation Counts Rankings
Ranking Based On Selection: 50
Cr(VI) reduction
Bioremediation
biosurfactants
photocatalysis
forward osmosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,126
3,266
0.637
* Total Citation Counts Rankings
Rankings
131,781
517
2
Ranking Based On Selection: 26
Neerish Revaprasadu
University of Zululand
Kwadlangezwa, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,861
3,852
0.490
Nanoscience
Materials Chemistry
Semiconductors...
* Total Citation Counts Rankings
Rankings
135,163
535
1
Ranking Based On Selection: 27
Augustine Ofomaja
Vaal University of Technology
Vanderbijlpark, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,682
3,440
0.448
adsorption
water purification
catalysis
electrochemistry
* Total Citation Counts Rankings
Rankings
137,302
545
10
Ranking Based On Selection: 28
Abhay Prakash Mishra
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,571
6,908
0.912
Phytochemistry
Nutraceuticals
Natural Product Research
* Total Citation Counts Rankings
Rankings
148,056
586
137
Ranking Based On Selection: 29
Luigi R Nassimbeni
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,051
826
0.117
* Total Citation Counts Rankings
Rankings
161,268
636
78
Ranking Based On Selection: 30
Ewa Cukrowska
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,493
2,740
0.422
* Total Citation Counts Rankings
Rankings
162,686
644
80
Ranking Based On Selection: 31
Helder M Marques
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,440
1,627
0.253
* Total Citation Counts Rankings
Rankings
163,178
647
4
Ranking Based On Selection: 32
Olalekan Fatoki
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,421
2,567
0.400
Environmental Analytical Chemistry
* Total Citation Counts Rankings
Rankings
164,809
655
56
Ranking Based On Selection: 33
Sooboo Singh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,360
1,920
0.302
* Total Citation Counts Rankings
Rankings
167,366
669
59
Ranking Based On Selection: 34
Fanie Van Heerden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,262
1,973
0.315
Chemistry
Natural Product Chemistry
* Total Citation Counts Rankings
Rankings
174,080
702
16
Ranking Based On Selection: 35
Omar Dagdag
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,020
5,805
0.964
Polymers
Organic chemistry
Coating
Corrosion
Nanotechnology
* Total Citation Counts Rankings
Rankings
179,867
731
18
Ranking Based On Selection: 36
Shivani Bhardwaj Mishra
University of South Africa
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,828
3,248
0.557
Sol-Gel Technology
Nanomaterials
Ceramics and Water Treatment
* Total Citation Counts Rankings
Rankings
181,317
741
179
Ranking Based On Selection: 37
Katye E. Altieri
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,783
2,105
0.364
Climate Change
Atmospheric chemistry
Marine atmosphere
* Total Citation Counts Rankings
Rankings
182,844
750
67
Ranking Based On Selection: 38
Glenn Maguire
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,733
2,346
0.409
* Total Citation Counts Rankings
Rankings
182,943
751
9
Ranking Based On Selection: 39
Guy P Kamatou
Tshwane University of Technology
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,729
2,824
0.493
Natural products chemistry
Essential oil
Biological activities
* Total Citation Counts Rankings
Rankings
191,338
793
69
Ranking Based On Selection: 40
Irene Barnes
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,470
3,221
0.589
Forest Pathology
mycology
population genetics
fungal taxonomy
* Total Citation Counts Rankings
Rankings
194,098
810
5
Ranking Based On Selection: 41
Ahmed A. Hussein
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,392
2,804
0.520
* Total Citation Counts Rankings
Rankings
196,805
818
31
Ranking Based On Selection: 42
Christien Strydom
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,316
2,005
0.377
* Total Citation Counts Rankings
Rankings
196,929
819
2
Ranking Based On Selection: 43
Ashwell Ndhlala
University of Limpopo
Mankweng, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,312
2,641
0.497
Medicinal Chemistry/Ethnophamarcology
* Total Citation Counts Rankings
Rankings
197,307
820
194
Ranking Based On Selection: 44
Charles J. Eyermann
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,302
1,215
0.229
* Total Citation Counts Rankings
Rankings
198,074
822
106
Ranking Based On Selection: 45
Klaus R Koch
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,281
1,040
0.197
Platinum group metals chemistry. Multinuclear NMR
photochemistry of coordination compounds
Isotope effects in NMR
acylthioure
* Total Citation Counts Rankings
Rankings
200,845
834
108
Ranking Based On Selection: 46
André De Villiers
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,206
1,724
0.331
chemistry
analytical chemistry
chromatography
mass spectrometry
* Total Citation Counts Rankings
Rankings
201,184
839
19
Ranking Based On Selection: 47
Andreas Roodt
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,197
1,026
0.197
coordination chemistry
reaction mechanisms
crystallography
catalysis
radiopharmacy models
* Total Citation Counts Rankings
Rankings
201,579
841
109
Ranking Based On Selection: 48
Willem Van Otterlo
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,187
1,687
0.325
Organic synthesis
Medicinal chemistry
Bioactive small molecules
* Total Citation Counts Rankings
Rankings
202,362
844
35
Ranking Based On Selection: 49
Johan Paul Beukes
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,165
2,779
0.538
Air Quality
Climate Change
Atmospheric Chemistry
Metallurgy
Pyrometallurgy
* Total Citation Counts Rankings
Rankings
203,899
850
75
Ranking Based On Selection: 50
Evans Chirwa
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,126
3,266
0.637
Cr(VI) reduction
Bioremediation
biosurfactants
photocatalysis
forward osmosis