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: 1
Atomic Layer Deposition
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,846
17,255
0.293
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Quantum chemistry. Heavy element chemistry. Relativistic effects.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,766
7,343
0.189
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,428
4,474
0.333
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Microbial diversity
toxic cyanobacteria
water quality
toxins and natural products
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,497
4,609
0.485
* Total Citation Counts Rankings
Ranking Based On Selection: 5
mass spectrometry
gas phase oxidation
atmospheric nucleation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,388
4,172
0.653
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Cellulose chemistry and technology
NMR
surface chemistry
ionic liquids
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,050
2,881
0.476
* Total Citation Counts Rankings
Ranking Based On Selection: 7
ALD
precursor chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,834
2,849
0.589
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,610
1,536
0.333
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Atmospheric Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,638
3,331
0.916
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Atmospheric Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,970
2,344
0.789
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Reaction Kinetics
Combustion Chemistry
Atmospheric Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,835
1,326
0.468
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Atmospheric Chemistry
Mass Spectrometry
Aerosols
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,440
2,035
0.834
* Total Citation Counts Rankings
Ranking Based On Selection: 13
mass spectrometry
glycopeptides
systems biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,411
1,037
0.430
* Total Citation Counts Rankings
Ranking Based On Selection: 14
marine aerosol formation
atmospheric chemistry
mass spectrometry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,281
2,196
0.963
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Analytical Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,587
717
0.452
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Exhaled breath analysis
trace gas detection
laser spectroscopy
chemical ionization mass spectrometry
molecular spectroscopy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
765
0.496
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Heterogeneous Catalysis
Materials Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,337
944
0.706
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Quantum chemistry
Atmospheric chemistry
Aerosol physics
Spectroscopy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,256
985
0.784
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Molecular Simulation
Computational Chemistry and Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,235
410
0.332
* Total Citation Counts Rankings
Ranking Based On Selection: 20
biomass (lignin/cellulose)
ionic liquids
proton chemistry
thermodynamics
NMR relaxation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,114
318
0.285
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Chemical Engineering
Sensor Development
Environmental Analysis
Smart Circular Economy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,070
871
0.814
* Total Citation Counts Rankings
Ranking Based On Selection: 22
analytical chemistry
atmospheric pressure chemical ionization
enzymatic catalysis
biomaterials
self-assembly
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
963
511
0.531
* Total Citation Counts Rankings
Ranking Based On Selection: 23
chemistry education research
CER
educational cheminformatics
chemistry teacher education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
848
534
0.630
* Total Citation Counts Rankings
Ranking Based On Selection: 24
atmospheric chemistry
ab initio calculations
ionic chemitry
spectroscopy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
761
241
0.317
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Analytical chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
553
544
0.984
Markku Leskela
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,846
17,255
0.293
Pekka Pyykko
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,766
7,343
0.189
Quantum chemistry. Heavy element chemistry. Relativistic effects.
Dage Sundholm
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,428
4,474
0.333
David P Fewer
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,497
4,609
0.485
Microbial diversity
toxic cyanobacteria
water quality
toxins and natural products
Nina Sarnela
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,388
4,172
0.653
mass spectrometry
gas phase oxidation
atmospheric nucleation
Alistair King
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,050
2,881
0.476
Cellulose chemistry and technology
NMR
surface chemistry
ionic liquids
Timo Hatanpää
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,834
2,849
0.589
Jaakko Niinistö
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,610
1,536
0.333
Haiyan Li
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,638
3,331
0.916
Yee Jun Tham
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,970
2,344
0.789
Arkke Eskola
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,835
1,326
0.468
Reaction Kinetics
Combustion Chemistry
Atmospheric Chemistry
Lei Yao
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,440
2,035
0.834
Atmospheric Chemistry
Mass Spectrometry
Aerosols
Sakari Joenväärä
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,411
1,037
0.430
mass spectrometry
glycopeptides
systems biology
Xu Cheng He|Xucheng He
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,281
2,196
0.963
marine aerosol formation
atmospheric chemistry
mass spectrometry
Jevgeni Parshintsev
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,587
717
0.452
Markus Metsälä
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,543
765
0.496
Exhaled breath analysis
trace gas detection
laser spectroscopy
chemical ionization mass spectrometry
molecular spectroscopy
Jhon Quiroz
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,337
944
0.706
Heterogeneous Catalysis
Materials Science
Nanna Myllys
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,256
985
0.784
Quantum chemistry
Atmospheric chemistry
Aerosol physics
Spectroscopy
Christopher D Daub
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,235
410
0.332
Molecular Simulation
Computational Chemistry and Physics
Gordon W Driver
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,114
318
0.285
biomass (lignin/cellulose)
ionic liquids
proton chemistry
thermodynamics
NMR relaxation
Zahra Safaei|Mahsa Safaei
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,070
871
0.814
Chemical Engineering
Sensor Development
Environmental Analysis
Smart Circular Economy
Joona Mikkilä
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
963
511
0.531
analytical chemistry
atmospheric pressure chemical ionization
enzymatic catalysis
biomaterials
self-assembly
Johannes Pernaa
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
848
534
0.630
chemistry education research
CER
educational cheminformatics
chemistry teacher education
Nicolai Bork
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
761
241
0.317
atmospheric chemistry
ab initio calculations
ionic chemitry
spectroscopy
Thanaporn Liangsupree
University of Helsinki
Helsinki, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
553
544
0.984