H
Helmut Schäfer
Researcher at University of Osnabrück
Publications - 56
Citations - 2723
Helmut Schäfer is an academic researcher from University of Osnabrück. The author has contributed to research in topics: Oxygen evolution & Water splitting. The author has an hindex of 24, co-authored 53 publications receiving 2261 citations. Previous affiliations of Helmut Schäfer include Free University of Berlin & University of Oldenburg.
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Lanthanide-Doped NaYF4 Nanocrystals in Aqueous Solution Displaying Strong Up-Conversion Emission
TL;DR: In this article, a colloidal solubility in water was obtained by treating the nanocrystals with 1-hydroxyethane-1,1-diphosphonic acid (HEDP).
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Prevalence, spectrum, and functional characterization of melanocortin-4 receptor gene mutations in a representative population-based sample and obese adults from Germany.
Anke Hinney,Thomas Bettecken,Patrick Tarnow,Harald Brumm,Kathrin Reichwald,Kathrin Reichwald,Peter Lichtner,André Scherag,Thuy Trang Nguyen,Pia Schlumberger,Winfried Rief,Caren Vollmert,Thomas Illig,H-Erich Wichmann,Helmut Schäfer,Matthias Platzer,Heike Biebermann,Thomas Meitinger,Johannes Hebebrand +18 more
TL;DR: A mutation screen of the melanocortin-4 receptor gene by capillary electrophoresis-based single-strand conformation polymorphism analysis and denaturing HPLC showed prevalence, spectrum, and functional characterization of MC4R mutations in the German population-based sample KORA-S4.
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Synthesis and Optical Properties of KYF4/Yb, Er Nanocrystals, and their Surface Modification with Undoped KYF4
TL;DR: In this article, the surface modification of a mixture of α-NaYF4/Yb3+, Er3+ nanocrystals with a mean diameter of approximately 13.5nm was performed to increase the upconversion efficiency.
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Stainless steel made to rust: a robust water-splitting catalyst with benchmark characteristics
Helmut Schäfer,Shamaila Sadaf,Lorenz Walder,Karsten Kuepper,Stephan Dinklage,Joachim Wollschläger,Lilli Schneider,Martin Steinhart,Jörg D. Hardege,Diemo Daum +9 more
TL;DR: In this article, a surface modification carried out with AISI 304, a general purpose austenitic stainless steel, very likely, based upon a dissolution mechanism, to result in the formation of an ultra-thin layer consisting of Ni, Fe oxide with a purity >99%.
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Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments
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 +12 more
TL;DR: In this paper , the authors present a review of the fundamentals of electrocatalytically initiated water splitting and the very latest scientific findings from university and institutional research, also covering specifications and special features of the current industrial processes and those processes currently being tested in large-scale applications.