O
Ofer Hirsch
Researcher at Technische Universität Darmstadt
Publications - 14
Citations - 364
Ofer Hirsch is an academic researcher from Technische Universität Darmstadt. The author has contributed to research in topics: Space charge & XANES. The author has an hindex of 9, co-authored 14 publications receiving 309 citations. Previous affiliations of Ofer Hirsch include Umicore & University of Alberta.
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Dynamics of polarization reversal in virgin and fatigued ferroelectric ceramics by inhomogeneous field mechanism
TL;DR: In this article, a new model of polarization switching was proposed, which suggests that the characteristic time variance in the ferroelectrics originates from the random distribution of the local electric fields due to intrinsic randomness of the material.
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Puzzling Mechanism behind a Simple Synthesis of Cobalt and Cobalt Oxide Nanoparticles: In Situ Synchrotron X-ray Absorption and Diffraction Studies
Malwina Staniuk,Ofer Hirsch,Niklaus Kränzlin,Rahel Böhlen,Wouter van Beek,Paula M. Abdala,Dorota Koziej +6 more
TL;DR: In this article, a simple approach to synthesize cobalt and cobalt oxide nanoparticles in an organic solvent was proposed, and the cubic Co3O4 nanoparticles can be easily obtained, even at temperatures as low as 80 °C.
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Aging of poled ferroelectric ceramics due to relaxation of random depolarization fields by space-charge accumulation near grain boundaries
TL;DR: In this paper, the energy of the local depolarization field caused by mismatch of the polarizations of neighbor grains was evaluated and the kinetics of charge migration assumed presence of mobile oxygen vacancies in the material due to the intentional or unintentional acceptor doping.
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High-energy resolution X-ray absorption and emission spectroscopy reveals insight into unique selectivity of La-based nanoparticles for CO2
TL;DR: The position of the different constituents within the unit cell of monoclinic La2O2CO3 is determined and this information is used to interpret in situ high-energy resolution fluorescence-detected (HERFD) X-ray absorption near-edge structure (XANES) and valence-to-coreX-ray emission spectroscopy (vtc XES).
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Efficient simulation of an ammonia oxidation reactor using a solution mapping approach
A. Scheuer,A. Scheuer,Ofer Hirsch,Ofer Hirsch,Robert E. Hayes,Herbert Vogel,Martin Votsmeier +6 more
TL;DR: In this paper, a single channel monolith reactor model for the oxidation of ammonia is implemented, where spline interpolation functions are constructed from pre-computed solutions of the mass balances of one volume element of the reactor model.