Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Dermot Diamond
chemical sensors
sensor networks
environment
wearable sensors
materials chemistry
Metrics
H-Index
i10 Index
Citation
85
354
26,934
* Rankings
Ranking Based On Selection :2
Vickie Mckee
coordination and bioinorganic chemistry
Crystallography
Metrics
H-Index
i10 Index
Citation
56
245
11,981
* Rankings
Ranking Based On Selection :3
Fiona Regan
Emerging contaminants
Sensors
Chemistry
Microplastics
water
Metrics
H-Index
i10 Index
Citation
43
101
5,744
* Rankings
Ranking Based On Selection :4
Fiona Regan
Sensing
environmental monitoring
water technologies
emerging contaminants
Metrics
H-Index
i10 Index
Citation
43
101
5,741
* Rankings
Ranking Based On Selection :5
Apryll Stalcup
Separations
chiral
ionic liquids
cyclodextrins
analytical chemistry
Metrics
H-Index
i10 Index
Citation
42
91
6,102
* Rankings
Ranking Based On Selection :6
Aoife Morrin
Analytical Chemistry
Materials Science
Sensors
Diagnostics
Electrochemistry
Metrics
H-Index
i10 Index
Citation
36
66
5,888
* Rankings
Ranking Based On Selection :7
John F Gallagher
Chemistry
Crystallography
Macrocycles
Trezimides
Tennimides
Metrics
H-Index
i10 Index
Citation
33
112
3,892
* Rankings
Ranking Based On Selection :8
Andrew Kellett
metallodrug design
bioinorganic chemistry
DNA damage
nucleic acids
click chemistry
Metrics
H-Index
i10 Index
Citation
32
53
3,299
* Rankings
Ranking Based On Selection :10
Kieran Nolan
Synthetic chemistry
Photocatalysis
Wastewater Treatment
Flow Synthesis
Biocatalysis
Metrics
H-Index
i10 Index
Citation
31
45
3,939
* Rankings
Ranking Based On Selection :11
Deepak Chandran
Veterinary Medicine
Biochemistry
Public Health
Animal Science
Food Science
Metrics
H-Index
i10 Index
Citation
26
62
2,487
* Rankings
Ranking Based On Selection :12
Blanaid White
Analytical Chemistry
Contaminants of Emerging Concern
Water
Phenolic Acids
Metrics
H-Index
i10 Index
Citation
22
38
1,493
* Rankings
Ranking Based On Selection :13
Gareth T Whiting
Heterogeneous Catalysis
Advanced Characterization of Complex Catalytic Materials
Metrics
H-Index
i10 Index
Citation
21
25
1,936
* Rankings
Ranking Based On Selection :14
Nessan Kerrigan
Organic Chemistry
Synthesis
Organocatalysis
Transition metal catalysis
Dual catalysis
Metrics
H-Index
i10 Index
Citation
21
28
1,002
* Rankings
Ranking Based On Selection :15
Mm Morshed
Surface Engineering
Plasma Technogy and Poymer Matrix Composite
Carbon materials
Natural fibre
Metrics
H-Index
i10 Index
Citation
15
17
860
* Rankings
Ranking Based On Selection :16
Mukund Ghavre
Drug Discovery
Organic Synthesis
Medicinal Chemistry
Green Chemistry
Solar Energy
Metrics
H-Index
i10 Index
Citation
13
15
649
Brian Brennan
Analytical chemistry
environmental chemistry
Metrics
H-Index
i10 Index
Citation
5
5
141
Bríonna Mcgorman
Nucleic acids
Enzymatic synthesis
Bio-inorganic chemistry
Targeted therapeutics
Click chemistry
Metrics
H-Index
i10 Index
Citation
4
3
64
Fionn Ó Maolmhuaidh
Cardiomyocyte stimulation
cardiovascular disease
bipolar electrochemistry
electrochemistry
Metrics
H-Index
i10 Index
Citation
3
2
206
Joseph Hennessy
Bioinorganic Chemistry
Platinum Chemistry
Nucleic Acids
Click Chemistry
Antisense
Metrics
H-Index
i10 Index
Citation
2
1
32
Alex Gibney
Inorganic Chemistry
Medicinal Chemistry
Nucleic Acids
Metrics
H-Index
i10 Index
Citation
2
1
21
Sean O Halloran
Chemistry
3D Printing
Chemical biology
enzymology
Metrics
H-Index
i10 Index
Citation
1
1
93
Rankings
Ranking Based On Selection: 1
Dermot Diamond
Metrics
H-Index
i10 Index
Citation Counts
85
354
26,934
chemical sensors
sensor networks
environment
wearable sensors
materials chemistry
Rankings
Ranking Based On Selection: 2
Vickie Mckee
Metrics
H-Index
i10 Index
Citation Counts
56
245
11,981
coordination and bioinorganic chemistry
Crystallography
Rankings
Ranking Based On Selection: 3
Fiona Regan
Metrics
H-Index
i10 Index
Citation Counts
43
101
5,744
Emerging contaminants
Sensors
Chemistry
Microplastics
water
Rankings
Ranking Based On Selection: 4
Fiona Regan
Metrics
H-Index
i10 Index
Citation Counts
43
101
5,741
Sensing
environmental monitoring
water technologies
emerging contaminants
Rankings
Ranking Based On Selection: 5
Apryll Stalcup
Metrics
H-Index
i10 Index
Citation Counts
42
91
6,102
Separations
chiral
ionic liquids
cyclodextrins
analytical chemistry
Rankings
Ranking Based On Selection: 6
Aoife Morrin
Metrics
H-Index
i10 Index
Citation Counts
36
66
5,888
Analytical Chemistry
Materials Science
Sensors
Diagnostics
Electrochemistry
Rankings
Ranking Based On Selection: 7
John F Gallagher
Metrics
H-Index
i10 Index
Citation Counts
33
112
3,892
Chemistry
Crystallography
Macrocycles
Trezimides
Tennimides
Rankings
Ranking Based On Selection: 8
Andrew Kellett
Metrics
H-Index
i10 Index
Citation Counts
32
53
3,299
metallodrug design
bioinorganic chemistry
DNA damage
nucleic acids
click chemistry
Rankings
Ranking Based On Selection: 9
Brian P Kelleher
Metrics
H-Index
i10 Index
Citation Counts
31
60
6,078
Rankings
Ranking Based On Selection: 10
Kieran Nolan
Metrics
H-Index
i10 Index
Citation Counts
31
45
3,939
Synthetic chemistry
Photocatalysis
Wastewater Treatment
Flow Synthesis
Biocatalysis
Rankings
Ranking Based On Selection: 11
Deepak Chandran
Metrics
H-Index
i10 Index
Citation Counts
26
62
2,487
Veterinary Medicine
Biochemistry
Public Health
Animal Science
Food Science
Rankings
Ranking Based On Selection: 12
Blanaid White
Metrics
H-Index
i10 Index
Citation Counts
22
38
1,493
Analytical Chemistry
Contaminants of Emerging Concern
Water
Phenolic Acids
Rankings
Ranking Based On Selection: 13
Gareth T Whiting
Metrics
H-Index
i10 Index
Citation Counts
21
25
1,936
Heterogeneous Catalysis
Advanced Characterization of Complex Catalytic Materials
Rankings
Ranking Based On Selection: 14
Nessan Kerrigan
Metrics
H-Index
i10 Index
Citation Counts
21
28
1,002
Organic Chemistry
Synthesis
Organocatalysis
Transition metal catalysis
Dual catalysis
Rankings
Ranking Based On Selection: 15
Mm Morshed
Metrics
H-Index
i10 Index
Citation Counts
15
17
860
Surface Engineering
Plasma Technogy and Poymer Matrix Composite
Carbon materials
Natural fibre
Rankings
Ranking Based On Selection: 16
Mukund Ghavre
Metrics
H-Index
i10 Index
Citation Counts
13
15
649
Drug Discovery
Organic Synthesis
Medicinal Chemistry
Green Chemistry
Solar Energy
Rankings
Ranking Based On Selection: 17
Brian Brennan
Metrics
H-Index
i10 Index
Citation Counts
5
5
141
Analytical chemistry
environmental chemistry
Rankings
Ranking Based On Selection: 18
Bríonna Mcgorman
Metrics
H-Index
i10 Index
Citation Counts
4
3
64
Nucleic acids
Enzymatic synthesis
Bio-inorganic chemistry
Targeted therapeutics
Click chemistry
Rankings
Ranking Based On Selection: 19
Fionn Ó Maolmhuaidh
Metrics
H-Index
i10 Index
Citation Counts
3
2
206
Cardiomyocyte stimulation
cardiovascular disease
bipolar electrochemistry
electrochemistry
Rankings
Ranking Based On Selection: 20
Joseph Hennessy
Metrics
H-Index
i10 Index
Citation Counts
2
1
32
Bioinorganic Chemistry
Platinum Chemistry
Nucleic Acids
Click Chemistry
Antisense
Rankings
Ranking Based On Selection: 21
Alex Gibney
Metrics
H-Index
i10 Index
Citation Counts
2
1
21
Inorganic Chemistry
Medicinal Chemistry
Nucleic Acids
Rankings
Ranking Based On Selection: 22
Rachel Bracker
Metrics
H-Index
i10 Index
Citation Counts
2
0
10
Rankings
Ranking Based On Selection: 23
Sean O Halloran
Metrics
H-Index
i10 Index
Citation Counts
1
1
93
Chemistry
3D Printing
Chemical biology
enzymology