Helmut Schäfer

9.2k total citations · 3 hit papers
65 papers, 7.6k citations indexed

About

Helmut Schäfer is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Inorganic Chemistry. According to data from OpenAlex, Helmut Schäfer has authored 65 papers receiving a total of 7.6k indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Electrical and Electronic Engineering, 24 papers in Materials Chemistry and 17 papers in Inorganic Chemistry. Recurrent topics in Helmut Schäfer's work include Electrocatalysts for Energy Conversion (14 papers), Advanced battery technologies research (12 papers) and Electrochemical Analysis and Applications (11 papers). Helmut Schäfer is often cited by papers focused on Electrocatalysts for Energy Conversion (14 papers), Advanced battery technologies research (12 papers) and Electrochemical Analysis and Applications (11 papers). Helmut Schäfer collaborates with scholars based in Germany, United Kingdom and United States. Helmut Schäfer's co-authors include Markus Haase, Franz Walter, W. Lieke, Dieter Meschede, C.D. Bredl, J. Aarts, F. Steglich, Pavel Ptáček, Marian Chatenet and Bruno G. Pollet and has published in prestigious journals such as Physical Review Letters, Chemical Society Reviews and Advanced Materials.

In The Last Decade

Helmut Schäfer

64 papers receiving 7.5k citations

Hit Papers

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What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Upconverting Nanoparticles

2011 2.2k citations Markus Haase, Helmut Schäfer Angewandte Chemie International Edition profile →
Superconductivity in the Presence of Strong Pauli Paramagnetism: CeCu2Si2

1979 1.5k citations F. Steglich, J. Aarts et al. Physical Review Letters profile →
Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments

2022 1.3k citations Marian Chatenet, Bruno G. Pollet et al. Chemical Society Reviews profile →

Peers

Countries citing papers authored by Helmut Schäfer

Since Specialization

Citations

This map shows the geographic impact of Helmut Schäfer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Helmut Schäfer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Helmut Schäfer more than expected).

Fields of papers citing papers by Helmut Schäfer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helmut Schäfer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Helmut Schäfer. The network helps show where Helmut Schäfer may publish in the future.

Co-authorship network of co-authors of Helmut Schäfer

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Schäfer. A scholar is included among the top collaborators of Helmut Schäfer based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Helmut Schäfer. Helmut Schäfer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Water‐Splitting “Without Water”: Splitting of the Crystallised Water of Hydrated Salts 2025 ·Angewandte Chemie International Edition ·(unknown), Shirui Wang, (unknown), (unknown), H. Schmidt, (unknown), Svea Petersen, (unknown), Alex M. Ganose, Helmut Schäfer	0
2	Increased Readiness for Water Splitting: NiO‐Induced Weakening of Bonds in Water Molecules as Possible Cause of Ultra‐Low Oxygen Evolution Potential 2024 ·Small ·(unknown), Xian Qin, (unknown), Dirk Enke, (unknown), (unknown), (unknown), (unknown), Johann P. Klare, Karsten Küpper, Anja Schuster, (unknown), Martin Steinhart, Harald Gröger, Diemo Daum, Helmut Schäfer	7
3	The Readiness of Water Molecules to Split into Hydrogen + Oxygen: A Proposed New Aspect of Water Splitting 2023 ·Advanced Materials ·Helmut Schäfer, Anja Schuster, Stefan Kunis, (unknown), Jörg D. Hardege, (unknown), (unknown)	14
4	Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments breakdown → 2022 ·Chemical Society Reviews ·Marian Chatenet, Bruno G. Pollet, Dario R. Dekel, Fabio Dionigi, Jonathan Deseure, Pierre Millet, Richard D. Braatz, Martin Z. Bazant, Michael Eikerling, Iain Staffell, Paul Balcombe, Yang Shao‐Horn, Helmut Schäfer	1292
5	Rapid Patterning of Nonlinear Optical 2D-photonic Crystals on Indium Tin Oxide 2022 ·Conference on Lasers and Electro-Optics ·(unknown), Mirco Imlau, (unknown), (unknown), (unknown), Markus Haase, Helmut Schäfer, Martin Steinhart	1
6	Oxidized Mild Steel S235: An Efficient Anode for Electrocatalytically Initiated Water Splitting 2015 ·ChemSusChem ·Helmut Schäfer, Karsten Küpper, J. Wollschläger, Nikolai Kashaev, Jörg D. Hardege, Lorenz Walder, Seyyed Mohsen Beladi‐Mousavi, (unknown), Martin Steinhart, Shamaila Sadaf, (unknown)	52
7	Ultrafine Sanding Paper: A Simple Tool for Creating Small Particles 2014 ·Small ·Helmut Schäfer, (unknown), (unknown), (unknown), (unknown), H. Eickmeier, (unknown), Nikolai Kashaev, Jörg Nordmann, (unknown), (unknown), Martin Steinhart	16
8	Zirconia‐based Aerogels via Hydrolysis of Salts and Alkoxides: The Influence of the Synthesis Procedures on the Properties of the Aerogels 2013 ·Chemistry - An Asian Journal ·Helmut Schäfer, (unknown), Barbara Milow, (unknown), Martin Steinhart, Lorenz Ratke	19
9	Three-Dimensional to Two-Dimensional Crossover in the Hydrodynamic Interactions between Micron-Scale Rods 2011 ·Physical Review Letters ·Roberto Di Leonardo, (unknown), Guido Bolognesi, Helmut Schäfer, Martin Steinhart	18
10	Optimizing the optical trapping stiffness of holographically trapped microrods using high-speed video tracking 2011 ·Journal of Optics ·David B. Phillips, D. M. Carberry, Stephen H. Simpson, Helmut Schäfer, Martin Steinhart, Richard Bowman, Graham M. Gibson, Miles J. Padgett, S. Hanna, M. J. Miles	38
11	Nanopartikel für die Aufwärtskonversion 2011 ·Angewandte Chemie ·Markus Haase, Helmut Schäfer	166
12	Crystal Phase Control of NaGdF₄:Eu³⁺ Nanocrystals: Influence of the Fluoride Concentration and Molar Ratio between NaF and GdF₃ 2010 ·Crystal Growth & Design ·Pavel Ptáček, Helmut Schäfer, (unknown), Karsten Kömpe, Markus Haase	31
13	Synthesis of Hexagonal Yb³⁺,Er³⁺‐Doped NaYF₄ Nanocrystals at Low Temperature 2009 ·Advanced Functional Materials ·Helmut Schäfer, Pavel Ptáček, H. Eickmeier, Markus Haase	136
14	Hexaaryltetragermabuta-1,3-diene: A Molecule with Conjugated Ge−Ge Double Bonds 2000 ·Angewandte Chemie International Edition ·Helmut Schäfer, Wolfgang Saak, Manfred Weidenbruch	51
15	Reaction of trimethylsilyl azide with a digermene in the presence of water: 1,2-addition of hydrazoic acid 2000 ·Journal of Organometallic Chemistry ·Helmut Schäfer, Wolfgang Saak, Manfred Weidenbruch	9
16	Azadigermiridines by Addition of Diazomethane or Trimethylsilyldiazomethane to a Digermene¹ 1999 ·Organometallics ·Helmut Schäfer, Wolfgang Saak, Manfred Weidenbruch	57
17	Tolerance of intravenous low‐molecular‐weight heparin after eczematous reaction to subcutaneous heparin 1991 ·Contact Dermatitis ·P. Koch, Friedrich A. Bahmer, Helmut Schäfer	23
18	The structure of bis(triethylphosphine)[η2-bis(trimethylsilyl)diphosphene]nickel, [(C2H5)3P]2Ni[PSi(CH3)3]2, at 175 K, a complex containing a P-Ni-P ring system 1982 ·Acta Crystallographica Section B ·(unknown), Helmut Schäfer	39
19	Superconductivity in the Presence of Strong Pauli Paramagnetism: CeCu2Si2 breakdown → 1979 ·Physical Review Letters ·F. Steglich, J. Aarts, C.D. Bredl, W. Lieke, Dieter Meschede, Franz Walter, Helmut Schäfer	1505
20	Die abfallende Phase des aktiven Zustandes des Tibialis anterior, Gastrocnemius und Soleus der Katze und ihre Beeinflussung durch Dehnung und Sympathicomimetica 1963 ·Pflügers Archiv - European Journal of Physiology ·I. Jurna, W. Rummel, Helmut Schäfer	4

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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