World's Best Scientists 2026 revealed!
Rolf Hempelmann

Rolf Hempelmann

D-Index & Metrics

Materials Science

D-Index
59
Citations
12131
World Ranking
7389
National Ranking
431

Chemistry

D-Index
60
Citations
12417
World Ranking
9723
National Ranking
701

Rolf Hempelmann publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Rolf Hempelmann sits on this spectrum.

50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50 publications 1,163+

This scientist: 392 publications — 76th percentile

76% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

Rolf Hempelmann D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Rolf Hempelmann sits on this spectrum.

40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40 D-Index 165+

This scientist: 59 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

Overview

Rolf Hempelmann is affiliated with Saarland University in Germany and has a research background concentrated in engineering and materials science. Their work extensively covers subfields including electrical and electronic engineering, materials chemistry, catalysis, electronic, optical and magnetic materials, as well as renewable energy and sustainability topics.

The scientist's main topics of study include ionic liquids properties and applications, advanced battery technologies research, supercapacitor materials and fabrication, electrocatalysts for energy conversion, and advancements in battery materials and technologies. These topics reflect a strong focus on energy-related materials and technologies.

Frequent publication venues for their research include The Cambridge Structural Database, Physical Chemistry Chemical Physics, SSRN Electronic Journal, The Journal of Physical Chemistry B, and Chemistry - A European Journal. These venues indicate a presence in both structural and physical chemistry domains as well as interdisciplinary journals in chemistry and materials science.

Key recent papers authored or co-authored by Rolf Hempelmann include:

  • Ether functionalisation, ion conformation and the optimisation of macroscopic properties in ionic liquids, 2020, Physical Chemistry Chemical Physics
  • Ionic liquid derived nitrogen-doped graphite felt electrodes for vanadium redox flow batteries, 2020, Carbon
  • Investigation of structural, optical, and magnetic properties of Co2+ ions substituted CuFe2O4 spinel ferrite nanoparticles prepared via precipitation approach, 2021, Journal of the Australian Ceramic Society
  • Ionic liquid-derived FeCo alloys encapsulated in nitrogen-doped carbon framework as advanced bifunctional catalysts for rechargeable Zn-air batteries, 2022, Journal of Alloys and Compounds
  • Comprehensive Study of the Impact of Mg2+ Doping on Optical, Structural, and Magnetic Properties of Copper Nanoferrites, 2020, Journal of Superconductivity and Novel Magnetism

These publications span materials chemistry, catalysis, and advanced materials for energy storage and conversion, indicating a multidisciplinary approach combining synthesis, structural analysis, and functional testing in emerging energy technologies.

Frequent co-authors with whom Rolf Hempelmann has collaborated include:

  • Daniel Rauber
  • Frederik Philippi
  • Christopher W. M. Kay
  • Sangwon Kim
  • Björn Kuttich

Best Publications

  • Electrodeposition of nanocrystalline metals and alloys from ionic liquids

    Frank Endres;Mirko Bukowski;Rolf Hempelmann;Harald Natter

  • Nanocrystalline nickel and nickel-copper alloys: Synthesis, characterization, and thermal stability

    H. Natter;M. Schmelzer;R. Hempelmann

  • Nanocrystalline Copper by Pulsed Electrodeposition: The Effects of Organic Additives, Bath Temperature, and pH

    H. Natter;R. Hempelmann

  • Electrodeposition of nano- and microcrystalline aluminium in three different air and water stable ionic liquids.

    S. Zein El Abedin;E. M. Moustafa;R. Hempelmann;H. Natter

  • Grain-growth kinetics of nanocrystalline iron studied in situ by synchrotron real-time X-ray diffraction

    H. Natter;M. Schmelzer;M.-S Löffler,†,§;C. E. Krill

  • Quasielastic Neutron Scattering and Solid State Diffusion

    Rolf Hempelmann

  • Additive free electrodeposition of nanocrystalline aluminium in a water and air stable ionic liquid

    S. Zein El Abedin;E.M. Moustafa;R. Hempelmann;H. Natter

  • Microemulsion mediated sol-gel synthesis of nano-scaled MAl2O4 (M=Co, Ni, Cu) spinels from single-source heterobimetallic alkoxide precursors

    Frank Meyer;Rolf Hempelmann;Sanjay Mathur;Michael Veith

  • Tailored mesostructuring and biofunctionalization of gold for increased electroactivity.

    Rafael Szamocki;Stephane Reculusa;Serge Ravaine;Phil N. Bartlett

  • Tailor-made nanomaterials designed by electrochemical methods

    Harald Natter;Rolf Hempelmann

  • Macroporous ultramicroelectrodes for improved electroanalytical measurements.

    Rafael Szamocki;Alexandra Velichko;Christian Holzapfel;Frank Mücklich

  • Electro-catalytic oxidative cleavage of lignin in a protic ionic liquid

    Elena Reichert;Reiner Wintringer;Dietrich A. Volmer;Rolf Hempelmann

  • Synthesis and characterizations of manganese ferrites for hyperthermia applications

    A. Doaga;A.M. Cojocariu;W. Amin;F. Heib

  • Dissecting anion-cation interaction energies in protic ionic liquids.

    Koichi Fumino;Verlaine Fossog;Kai Wittler;Rolf Hempelmann

  • Core shell particles consisting of cobalt ferrite and silica as model ferrofluids [CoFe2O4–SiO2 core shell particles]

    Joachim Wagner;Tina Autenrieth;Rolf Hempelmann

  • Muon diffusion and trapping in proton conducting oxides

    R. Hempelmann;M. Soetratmo;O. Hartmann;R. Wäppling

  • Quasielastic thermal neutron scattering experiment on the proton conductor SrCe0.95Yb0.05H0.02O2.985

    Th Matzke;U. Stimming;Christof Karmonik;M. Soetratmo

  • Electrochemical Deposition under Oxidizing Conditions (EDOC) : A new synthesis for nanocrystalline metal oxides

    A Dierstein;H Natter;F Meyer;H.-O Stephan

  • A colloidal approach to nanometre-sized mixed oxide ceramic powders

    Horst Herrig;Rolf Hempelmann

  • Fundamentals and properties of some Ti/Mn based laves phase hydrides

    O. Bernauer;J. Töpler;D. Noréus;R. Hempelmann

  • Size-controlled synthesis of nanocrystalline BaTiO3 by a sol-gel type hydrolysis in microemulsion-provided nanoreactors

    Ch. Beck;W. Härtl;R. Hempelmann

Frequent Co-Authors

Ralf Ludwig
Ralf Ludwig University of Rostock
Dirk Henkensmeier
Dirk Henkensmeier Korea Institute of Science and Technology
Dieter Richter
Dieter Richter Forschungszentrum Jülich
Alexander Kuhn
Alexander Kuhn Centre national de la recherche scientifique, CNRS
Dietrich A. Volmer
Dietrich A. Volmer Humboldt-Universität zu Berlin
Sven Ingebrandt
Sven Ingebrandt RWTH Aachen University
Alain Walcarius
Alain Walcarius University of Lorraine
Tobias Kraus
Tobias Kraus Leibniz Association
Serge Ravaine
Serge Ravaine Centre national de la recherche scientifique, CNRS
Ulrich Stimming
Ulrich Stimming Technical University of Munich

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