@article{,
title = {Nano-Scale Complexions Facilitate Li Dendrite-Free Operation in LATP Solid-State Electrolyte},
author = {S Stegmaier and R Schierholz and I Povstugar and J Barthel and S P Rittmeyer and S Yu and S Wengert and S Rostami and H Kungl and K Reuter and R-A Eichel and C Scheurer},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202100707},
doi = {https://doi.org/10.1002/aenm.202100707},
issn = {1614-6832},
year = {2021},
date = {2021-05-28},
journal = {Advanced Energy Materials},
volume = {n/a},
number = {n/a},
pages = {2100707},
abstract = {Abstract Dendrite formation and growth remains a major obstacle toward high-performance all solid-state batteries using Li metal anodes. The ceramic Li(1+x)Al(x)Ti(2−x)(PO4)3 (LATP) solid-state electrolyte shows a higher than expected stability against electrochemical decomposition despite a bulk electronic conductivity that exceeds a recently postulated threshold for dendrite-free operation. Here, transmission electron microscopy, atom probe tomography, and first-principles based simulations are combined to establish atomistic structural models of glass-amorphous LATP grain boundaries. These models reveal a nanometer-thin complexion layer that encapsulates the crystalline grains. The distinct composition of this complexion constitutes a sizable electronic impedance. Rather than fulfilling macroscopic bulk measures of ionic and electronic conduction, LATP might thus gain the capability to suppress dendrite nucleation by sufficient local separation of charge carriers at the nanoscale.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{,
title = {Dual Nanoresonators for Ultrasensitive Chiral Detection},
author = {E Mohammadi and A Tittl and K L Tsakmakidis and T V Raziman and A G Curto},
url = {https://doi.org/10.1021/acsphotonics.1c00311},
doi = {10.1021/acsphotonics.1c00311},
year = {2021},
date = {2021-05-28},
journal = {ACS Photonics},
abstract = {The discrimination of enantiomers is crucial in biochemistry. However, chiral sensing faces significant limitations due to inherently weak chiroptical signals. Nanophotonics is a promising solution to enhance sensitivity thanks to increased optical chirality maximized by strong electric and magnetic fields. Metallic and dielectric nanoparticles can separately provide electric and magnetic resonances. Here we propose their synergistic combination in hybrid metal\textendashdielectric nanostructures to exploit their dual character for superchiral fields beyond the limits of single particles. For optimal optical chirality, in addition to maximization of the resonance strength, the resonances must spectrally coincide. Simultaneously, their electric and magnetic fields must be parallel and π/2 out of phase and spatially overlap. We demonstrate that the interplay between the strength of the resonances and these optimal conditions constrains the attainable optical chirality in resonant systems. Starting from a simple symmetric nanodimer, we derive closed-form expressions elucidating its fundamental limits of optical chirality. Building on the trade-offs of different classes of dimers, we then suggest an asymmetric dual dimer based on realistic materials. These dual nanoresonators provide strong and decoupled electric and magnetic resonances together with optimal conditions for chiral fields. Finally, we introduce more complex dual building blocks for a metasurface with a record 300-fold enhancement of local optical chirality in nanoscale gaps, enabling circular dichroism enhancement by a factor of 20. By combining analytical insight and practical designs, our results put forward hybrid resonators to increase chiral sensitivity, particularly for small molecular quantities.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{,
title = {Fast and accurate determination of the electroactive surface area of MnOx},
author = {M H Aufa and S A Watzele and S Hou and R W Haid and R M Kluge and A S Bandarenka and B Garlyyev},
url = {https://www.sciencedirect.com/science/article/pii/S0013468621009828},
doi = {https://doi.org/10.1016/j.electacta.2021.138692},
issn = {0013-4686},
year = {2021},
date = {2021-05-27},
journal = {Electrochimica Acta},
volume = {389},
pages = {138692},
abstract = {Manganese oxide (MnOx)-based materials are widely utilized in the field of electrocatalysis as bifunctional electrocatalysts for the oxygen reduction and evolution reactions. However, for an accurate assessment of their performance, the determination of their electrochemical active surface area (ECSA) is of paramount importance. So far, there is no fast and reproducible methodology. This article presents an easily applicable and affordable technique to determine the ECSA of MnOx accurately. The presented methodology makes use of the specific adsorption capacitance of reaction intermediates close to the onset potential of the oxygen evolution reaction. The electrochemical impedance spectroscopy is utilized to measure the specific adsorption capacitances at different potentials. Using MnOx thin-film electrodes, we determine the specific adsorption capacitances and present calibration values, which can be used for an accurate determination of the ECSA of different, for instance, nanostructured materials.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}