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
RM Harrison
air pollution
Atmospheric chemistry
aerosol science
environmental health
Metrics
H-Index
i10 Index
Citation
141
773
80,367
* Rankings
Ranking Based On Selection :2
Stephen Barnes
bile acids
isoflavones
mass spectrometry
cancer
lens cataracts
Metrics
H-Index
i10 Index
Citation
103
326
42,180
* Rankings
Ranking Based On Selection :6
Sergey Vyazovkin
physical chemistry
kinetics
polymers
pharmaceuticals
Metrics
H-Index
i10 Index
Citation
72
163
31,045
* Rankings
Ranking Based On Selection :7
Valsami-Jones
nanoscience
nanosafety
nanoscale processes
environmental chemistry
nano-bio interactions
Metrics
H-Index
i10 Index
Citation
71
190
17,347
* Rankings
Ranking Based On Selection :8
Tim Jones
surface
interface and thin film properties of inorganic and organic semiconductors
Metrics
H-Index
i10 Index
Citation
69
247
15,582
* Rankings
Ranking Based On Selection :13
William M Palin
Biomedical science
materials science
polymer chemistry
Metrics
H-Index
i10 Index
Citation
46
78
8,608
* Rankings
Ranking Based On Selection :14
Matthew B Renfrow
mass spectrometry
glycosylation
transcription
IgA1
IgA nephropathy
Metrics
H-Index
i10 Index
Citation
41
67
7,984
* Rankings
Ranking Based On Selection :16
Tim Albrecht
Physical Chemistry
Electrochemistry
Biophysics
Metrics
H-Index
i10 Index
Citation
37
86
4,900
* Rankings
Ranking Based On Selection :19
James HR Tucker
supramolecular chemistry
nucleic acids
ferrocene chemistry
bioorganometallic chemistry
Metrics
H-Index
i10 Index
Citation
33
68
3,157
* Rankings
Ranking Based On Selection :20
Paul Davies
Organic chemistry
Catalysis for synthesis
Gold catalysis
Metrics
H-Index
i10 Index
Citation
30
44
6,541
* Rankings
Ranking Based On Selection :21
Sadanandan E Velu
Medicinal Chemistry
Drug Discovery
Organic Chemistry.
Metrics
H-Index
i10 Index
Citation
30
57
2,224
* Rankings
Ranking Based On Selection :22
Liam Cox
organic chemistry
biological chemistry
medicinal chemistry
drug discovery
chemical biology
Metrics
H-Index
i10 Index
Citation
30
60
2,286
* Rankings
Ranking Based On Selection :23
Sooraj H Nandyala
Inorganic glass/ceramics materials and composites (2D and 3D) for biomedical and luminescence applications. Experience in bone r
Metrics
H-Index
i10 Index
Citation
29
45
1,986
* Rankings
Ranking Based On Selection :27
Gavin Rhys Lloyd
chemometrics
vibrational spectroscopy
metabolomics
Metrics
H-Index
i10 Index
Citation
26
45
8,563
* Rankings
Ranking Based On Selection :28
Christian Pfrang
Atmospheric Chemistry and Physics
Atmospheric Aerosols
Physical Chemistry
Metrics
H-Index
i10 Index
Citation
26
43
2,271
* Rankings
Ranking Based On Selection :30
Chiranjib Ghatak
Physical chemistry
Photophysics of biomolecules
Biophysics of lipid membrane in presence of proteins
Metrics
H-Index
i10 Index
Citation
26
38
1,709
* Rankings
Ranking Based On Selection :31
Margaret Eleanor O'Hara
Breath Analysis
Proton Transfer Reaction Mass Spectrometry
Voltile Organic Compounds
Hyperemesis Gravidarum
Nausea and Vomit
Metrics
H-Index
i10 Index
Citation
23
34
3,913
Pf Wang
Photochemistry
Carbohydrate Chemistry
Vaccine Adjuvants
Metrics
H-Index
i10 Index
Citation
22
39
1,668
* Rankings
Ranking Based On Selection :36
Andrew D. Southam
Mass Spectrometry
Metabolomics
Lipidomics
Cancer Research
Metrics
H-Index
i10 Index
Citation
21
27
2,604
* Rankings
Ranking Based On Selection :37
Valentina Prosapio
Chemical/Food engineering
Micronisation
Drying
Hydrocolloids
Emulsions
Metrics
H-Index
i10 Index
Citation
21
24
1,239
* Rankings
Ranking Based On Selection :38
Alan M. Jones
polypharmacology
metabolite
sulfate
sulfation
ADRs
Metrics
H-Index
i10 Index
Citation
20
35
1,231
* Rankings
Ranking Based On Selection :40
Javier Castells-Gil
Synthesis
Crystallography
Metal-Organic Frameworks
Li-ion Batteries
Metrics
H-Index
i10 Index
Citation
18
23
1,059
Jianzhong Chen
Bioanalytical Chemistry
Neutral Lipid Mass Spectrometry
Top-down Proteomics
Liquid Chromatography
Tear Film
Metrics
H-Index
i10 Index
Citation
18
22
973
William A. Stubbings
Persistent organic pollutants
Environmental chemistry
emerging contaminants
Metrics
H-Index
i10 Index
Citation
17
25
995
Nicola J. Rogers
Coordination Chemistry for Biomedical Applications
Metrics
H-Index
i10 Index
Citation
17
22
782
Ovokeroye Abafe
Analytical Chemistry
Exposure Science
Environmental Analysis
Risk Assessment
Metrics
H-Index
i10 Index
Citation
17
21
883
Sameh El Sayed
Organic chemistry
Silica
MOFS
Nanomaterilas
Polymer
Metrics
H-Index
i10 Index
Citation
17
21
613
Ajit Singh
Atmospheric aerosol
atmospheric chemistry and health impact
Metrics
H-Index
i10 Index
Citation
16
20
1,081
Joshua W Makepeace
Ammonia
hydrogen storage
solid state chemistry
energy materials
powder diffraction
Metrics
H-Index
i10 Index
Citation
16
21
1,771
Gayan B Wijeratne
Inorganic Chemistry
Bioinorganic Chemistry
Heme
Dioxygen
Nitric Oxide
Metrics
H-Index
i10 Index
Citation
15
19
728
Manoj Ravi
Chemical education
Heterogeneous Catalysis
Ammonia synthesis
Methane oxidation
Zeolites
Metrics
H-Index
i10 Index
Citation
13
15
1,623
Pritam Mondal
Bioinorganic Chemistry
Organometallics
Bioinspired Catalysis
Metrics
H-Index
i10 Index
Citation
13
13
361
Jennifer S Butler
Anticancer Drugs
Cancer
Bioinorganic Chemistry
Chemistry
Metrics
H-Index
i10 Index
Citation
8
8
731
Mark SD Read
Nuclear Materials
Atomistic Simulation
Computational Chemistry
Metrics
H-Index
i10 Index
Citation
7
7
430
Di Bai
Chemistry
organic chemistry
photochemistry
vaccine adjuvants
Metrics
H-Index
i10 Index
Citation
2
1
55
Omweri James Mokaya
Analytical chemistry electroanalytical chemistry
separation science
spectroscopy.
Metrics
H-Index
i10 Index
Citation
1
0
1
Rankings
Ranking Based On Selection: 1
RM Harrison
Metrics
H-Index
i10 Index
Citation Counts
141
773
80,367
air pollution
Atmospheric chemistry
aerosol science
environmental health
Rankings
Ranking Based On Selection: 2
Stephen Barnes
Metrics
H-Index
i10 Index
Citation Counts
103
326
42,180
bile acids
isoflavones
mass spectrometry
cancer
lens cataracts
Rankings
Ranking Based On Selection: 3
Neil R. Champness
Metrics
H-Index
i10 Index
Citation Counts
89
245
30,470
Rankings
Ranking Based On Selection: 4
Stuart Harrad
Metrics
H-Index
i10 Index
Citation Counts
82
222
24,979
Rankings
Ranking Based On Selection: 5
Rachel Oreilly
Metrics
H-Index
i10 Index
Citation Counts
79
226
20,491
Rankings
Ranking Based On Selection: 6
Sergey Vyazovkin
Metrics
H-Index
i10 Index
Citation Counts
72
163
31,045
physical chemistry
kinetics
polymers
pharmaceuticals
Rankings
Ranking Based On Selection: 7
Valsami-Jones
Metrics
H-Index
i10 Index
Citation Counts
71
190
17,347
nanoscience
nanosafety
nanoscale processes
environmental chemistry
nano-bio interactions
Rankings
Ranking Based On Selection: 8
Tim Jones
Metrics
H-Index
i10 Index
Citation Counts
69
247
15,582
surface
interface and thin film properties of inorganic and organic semiconductors
Rankings
Ranking Based On Selection: 9
Roy Johnston
Metrics
H-Index
i10 Index
Citation Counts
66
230
19,775
Rankings
Ranking Based On Selection: 10
John S. Fossey
Metrics
H-Index
i10 Index
Citation Counts
55
122
9,845
Rankings
Ranking Based On Selection: 11
Stefan Krause
Metrics
H-Index
i10 Index
Citation Counts
51
134
9,326
Rankings
Ranking Based On Selection: 12
Jon A Preece
Metrics
H-Index
i10 Index
Citation Counts
48
126
7,880
Rankings
Ranking Based On Selection: 13
William M Palin
Metrics
H-Index
i10 Index
Citation Counts
46
78
8,608
Biomedical science
materials science
polymer chemistry
Rankings
Ranking Based On Selection: 14
Matthew B Renfrow
Metrics
H-Index
i10 Index
Citation Counts
41
67
7,984
mass spectrometry
glycosylation
transcription
IgA1
IgA nephropathy
Rankings
Ranking Based On Selection: 15
Paul Anderson
Metrics
H-Index
i10 Index
Citation Counts
40
87
7,897
Rankings
Ranking Based On Selection: 16
Tim Albrecht
Metrics
H-Index
i10 Index
Citation Counts
37
86
4,900
Physical Chemistry
Electrochemistry
Biophysics
Rankings
Ranking Based On Selection: 17
Timothy Softley
Metrics
H-Index
i10 Index
Citation Counts
36
86
4,369
Rankings
Ranking Based On Selection: 18
Isolda Romero-Canelon
Metrics
H-Index
i10 Index
Citation Counts
33
58
4,268
Rankings
Ranking Based On Selection: 19
James HR Tucker
Metrics
H-Index
i10 Index
Citation Counts
33
68
3,157
supramolecular chemistry
nucleic acids
ferrocene chemistry
bioorganometallic chemistry
Rankings
Ranking Based On Selection: 20
Paul Davies
Metrics
H-Index
i10 Index
Citation Counts
30
44
6,541
Organic chemistry
Catalysis for synthesis
Gold catalysis
Rankings
Ranking Based On Selection: 21
Sadanandan E Velu
Metrics
H-Index
i10 Index
Citation Counts
30
57
2,224
Medicinal Chemistry
Drug Discovery
Organic Chemistry.
Rankings
Ranking Based On Selection: 22
Liam Cox
Metrics
H-Index
i10 Index
Citation Counts
30
60
2,286
organic chemistry
biological chemistry
medicinal chemistry
drug discovery
chemical biology
Rankings
Ranking Based On Selection: 23
Sooraj H Nandyala
Metrics
H-Index
i10 Index
Citation Counts
29
45
1,986
Inorganic glass/ceramics materials and composites (2D and 3D) for biomedical and luminescence applications. Experience in bone r
Rankings
Ranking Based On Selection: 24
Richard S. Grainger
Metrics
H-Index
i10 Index
Citation Counts
28
42
1,711
Rankings
Ranking Based On Selection: 25
Francisco Fernández Trillo
Metrics
H-Index
i10 Index
Citation Counts
27
41
2,321
Rankings
Ranking Based On Selection: 26
Andrew R. Jupp
Metrics
H-Index
i10 Index
Citation Counts
26
37
2,331
Rankings
Ranking Based On Selection: 27
Gavin Rhys Lloyd
Metrics
H-Index
i10 Index
Citation Counts
26
45
8,563
chemometrics
vibrational spectroscopy
metabolomics
Rankings
Ranking Based On Selection: 28
Christian Pfrang
Metrics
H-Index
i10 Index
Citation Counts
26
43
2,271
Atmospheric Chemistry and Physics
Atmospheric Aerosols
Physical Chemistry
Rankings
Ranking Based On Selection: 29
Anna Peacock
Metrics
H-Index
i10 Index
Citation Counts
26
43
3,343
Rankings
Ranking Based On Selection: 30
Chiranjib Ghatak
Metrics
H-Index
i10 Index
Citation Counts
26
38
1,709
Physical chemistry
Photophysics of biomolecules
Biophysics of lipid membrane in presence of proteins
Rankings
Ranking Based On Selection: 31
Margaret Eleanor O'Hara
Metrics
H-Index
i10 Index
Citation Counts
23
34
3,913
Breath Analysis
Proton Transfer Reaction Mass Spectrometry
Voltile Organic Compounds
Hyperemesis Gravidarum
Nausea and Vomit
Rankings
Ranking Based On Selection: 32
Aaron L Lucius
Metrics
H-Index
i10 Index
Citation Counts
23
47
1,630
Rankings
Ranking Based On Selection: 33
Andrew Creese
Metrics
H-Index
i10 Index
Citation Counts
23
33
2,038
Rankings
Ranking Based On Selection: 34
Carl Jenkinson
Metrics
H-Index
i10 Index
Citation Counts
22
27
1,803
Mass spectrometry
Vitamin D
Steroid analysis
Rankings
Ranking Based On Selection: 35
Pf Wang
Metrics
H-Index
i10 Index
Citation Counts
22
39
1,668
Photochemistry
Carbohydrate Chemistry
Vaccine Adjuvants
Rankings
Ranking Based On Selection: 36
Andrew D. Southam
Metrics
H-Index
i10 Index
Citation Counts
21
27
2,604
Mass Spectrometry
Metabolomics
Lipidomics
Cancer Research
Rankings
Ranking Based On Selection: 37
Valentina Prosapio
Metrics
H-Index
i10 Index
Citation Counts
21
24
1,239
Chemical/Food engineering
Micronisation
Drying
Hydrocolloids
Emulsions
Rankings
Ranking Based On Selection: 38
Alan M. Jones
Metrics
H-Index
i10 Index
Citation Counts
20
35
1,231
polypharmacology
metabolite
sulfate
sulfation
ADRs
Rankings
Ranking Based On Selection: 39
Joshua C. Worch
Metrics
H-Index
i10 Index
Citation Counts
20
23
1,457
Rankings
Ranking Based On Selection: 40
Javier Castells-Gil
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,059
Synthesis
Crystallography
Metal-Organic Frameworks
Li-ion Batteries
Rankings
Ranking Based On Selection: 41
Martin Walker
Metrics
H-Index
i10 Index
Citation Counts
18
29
1,665
Rankings
Ranking Based On Selection: 42
Jianzhong Chen
Metrics
H-Index
i10 Index
Citation Counts
18
22
973
Bioanalytical Chemistry
Neutral Lipid Mass Spectrometry
Top-down Proteomics
Liquid Chromatography
Tear Film
Rankings
Ranking Based On Selection: 43
William A. Stubbings
Metrics
H-Index
i10 Index
Citation Counts
17
25
995
Persistent organic pollutants
Environmental chemistry
emerging contaminants
Rankings
Ranking Based On Selection: 44
Nicola J. Rogers
Metrics
H-Index
i10 Index
Citation Counts
17
22
782
Coordination Chemistry for Biomedical Applications
Rankings
Ranking Based On Selection: 45
Ovokeroye Abafe
Metrics
H-Index
i10 Index
Citation Counts
17
21
883
Analytical Chemistry
Exposure Science
Environmental Analysis
Risk Assessment
Rankings
Ranking Based On Selection: 46
Sameh El Sayed
Metrics
H-Index
i10 Index
Citation Counts
17
21
613
Organic chemistry
Silica
MOFS
Nanomaterilas
Polymer
Rankings
Ranking Based On Selection: 47
Mark T Oakley
Metrics
H-Index
i10 Index
Citation Counts
17
21
833
Rankings
Ranking Based On Selection: 48
Ajit Singh
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,081
Atmospheric aerosol
atmospheric chemistry and health impact
Rankings
Ranking Based On Selection: 49
Joshua W Makepeace
Metrics
H-Index
i10 Index
Citation Counts
16
21
1,771
Ammonia
hydrogen storage
solid state chemistry
energy materials
powder diffraction
Rankings
Ranking Based On Selection: 50
Alex Dexter
Metrics
H-Index
i10 Index
Citation Counts
15
20
923
Rankings
Ranking Based On Selection: 51
Gayan B Wijeratne
Metrics
H-Index
i10 Index
Citation Counts
15
19
728
Inorganic Chemistry
Bioinorganic Chemistry
Heme
Dioxygen
Nitric Oxide
Rankings
Ranking Based On Selection: 52
Manoj Ravi
Metrics
H-Index
i10 Index
Citation Counts
13
15
1,623
Chemical education
Heterogeneous Catalysis
Ammonia synthesis
Methane oxidation
Zeolites
Rankings
Ranking Based On Selection: 53
Azarmidokht Gholamipour-Shirazi
Metrics
H-Index
i10 Index
Citation Counts
13
15
750
(bio)Microfluidics
Soft materials
Physical chemistry
Rankings
Ranking Based On Selection: 54
Pritam Mondal
Metrics
H-Index
i10 Index
Citation Counts
13
13
361
Bioinorganic Chemistry
Organometallics
Bioinspired Catalysis
Rankings
Ranking Based On Selection: 55
Timothy A Barendt
Metrics
H-Index
i10 Index
Citation Counts
9
9
1,731
Rankings
Ranking Based On Selection: 56
Sarah L Griffin
Metrics
H-Index
i10 Index
Citation Counts
9
9
880
Materials Chemistry
Metal-Organic Frameworks
Rankings
Ranking Based On Selection: 57
Jennifer S Butler
Metrics
H-Index
i10 Index
Citation Counts
8
8
731
Anticancer Drugs
Cancer
Bioinorganic Chemistry
Chemistry
Rankings
Ranking Based On Selection: 58
Akhil Kumar Singh
Metrics
H-Index
i10 Index
Citation Counts
7
5
136
Rankings
Ranking Based On Selection: 59
Mark SD Read
Metrics
H-Index
i10 Index
Citation Counts
7
7
430
Nuclear Materials
Atomistic Simulation
Computational Chemistry
Rankings
Ranking Based On Selection: 60
Parmanand Ahirwar
Metrics
H-Index
i10 Index
Citation Counts
3
2
38
Organic Chemistry
Medicinal Chemistry
Drug discovery
Rankings
Ranking Based On Selection: 61
Di Bai
Metrics
H-Index
i10 Index
Citation Counts
2
1
55
Chemistry
organic chemistry
photochemistry
vaccine adjuvants
Rankings
Ranking Based On Selection: 62
Manikpura Dewage Samith Buddhika Jayawardana
Metrics
H-Index
i10 Index
Citation Counts
2
1
46
Inorganic Chemistry
Computational Chemistry
Organic and Inorganic Synthesis
Rankings
Ranking Based On Selection: 63
Jaskamaljot Kaur Banwait
Metrics
H-Index
i10 Index
Citation Counts
1
1
43
Biophysical Chemistry
Organic Chemistry
Enzyme Kinetics
Rankings
Ranking Based On Selection: 64
Shanuk Rajapakse
Metrics
H-Index
i10 Index
Citation Counts
1
1
15
Rankings
Ranking Based On Selection: 65
Omweri James Mokaya
Metrics
H-Index
i10 Index
Citation Counts
1
0
1
Analytical chemistry electroanalytical chemistry
separation science
spectroscopy.