Results 21 to 30 of about 273 (127)

Jenseits von Ladungsausgleich: Gegenkationen in der Polyoxometallat‐Chemie

Angewandte Chemie, Volume 132, Issue 2, Page 606-623, January 7, 2020., 2020
Plus‐Minus: Gegenkationen spielen in der Polyoxometallatchemie eine wichtige Rolle. Sie steuern Reaktivität, templatisieren Clusterbildung und supramolekulare Aggregation und geben Polyoxometallaten (POMs) sowie POM‐Materialien neue Funktion. Dieser Aufsatz bespricht klassische und neuartige Rollen von Gegenkationen in der grundlegenden wie auch ...
Archismita Misra, Karoly Kozma, Carsten Streb, May Nyman   +3 more
wiley   +1 more source

CNG und LNG aus biogenen Reststoffen – ein Konzept zur ressourcenschonenden Kraftstoffproduktion CNG and LNG from Biogenic Residues – A Concept for Resource‐Saving Fuel Production

Chemie Ingenieur Technik, Volume 92, Issue 1-2, Page 144-155, January/February 2020., 2020
Ein Verfahren zur Kopplung von Biomassevergasung, Hochtemperaturelektrolyse und Methanisierung wurde entwickelt, das die Produktion von Bio‐CNG und Bio‐LNG ermöglicht. Biogener Kohlenstoff wird dabei effizient und nahezu vollständig in die Produkte überführt, weshalb dieser PtX‐Prozess eine wichtige Rolle im zukünftigen Energiesystem einnehmen kann ...
Christian Müller, Régis Anghilante, Max Schmid, Marlies Härdtlein, Reinhold Spörl, David Colomar, Felix Ortloff, Ludger Eltrop, Frank Graf, Siegfried Bajohr, Thomas Kolb   +10 more
wiley   +1 more source

Multispectral Characterization of Additively Manufactured and Dip-Coated Axicons

Photonics
The use of additive manufacturing for rapid prototyping of near-infrared and terahertz components provides seamless and error-free production. This article discusses the additive manufacturing and post-processing of axicons and their performance ...
Abhijeet Shrotri, Annamarija Starsaja, Suraj Joshi, Sascha Preu, Oliver Stübbe   +4 more
doaj   +1 more source

UV-LED Photo-Activated Room Temperature NO2 Sensors Based on Nanostructured ZnO/AlN Thin Films

Proceedings, 2019
UV-light emitting diodes (395–278 nm) were used to investigate the gas sensing attributes of planar and nanostructured ZnO/AlN thin films on Si substrate towards NO2 at room temperature. A significant increased sensitivity ((Rg − Ra)/Ra = 65.3 ppm NO2 in
Tony Granz, Marius Temming, Jiushuai Xu, Qomaruddin, Cristian Fabrega, Nurhalis Majid, Gerhard Lilienkamp, Winfried Daum, Erwin Peiner, Joan Daniel Prades, Andreas Waag, Hutomo Suryo Wasisto   +11 more
doaj   +1 more source

EDGE2D-EIRENE simulations of the impact of poloidal flux expansion on the radiative divertor performance in JET

Nuclear Materials and Energy, 2017
In the past at JET, with the MkI divertor, a systematic study of the influence of X-point height and poloidal flux expansion has been conducted [1,2] showing minor differences in the radiation distribution, whereas in [3] experiment and simulations have ...
B. Viola, G. Calabró, A.E. Jaervinen, I. Lupelli, F. Maviglia, S. Wiesen, M. Wischmeier, JET Contributors   +7 more
doaj   +1 more source

Grenzflächen‐Photoelektrochemie in der Organischen Synthese

Angewandte Chemie, Volume 137, Issue 42, October 13, 2025.
Heterogene Photoelektroden sind für die Aktivierung von H2O und CO2 weit verbreitet, während homogene Photoelektrochemie mit molekularen Katalysatoren die Aktivierung komplexer Moleküle in der Synthese dominiert. Dennoch bietet Grenzflächen‐Photoelektrochemie (iPEC) ein großes Potenzial für die Synthese, einschließlich Kosteneffizienz ...
Gabriel Chan, Daria Corsi, Oleksandr Savateev, Paolo Giusto, Joshua P. Barham   +4 more
wiley   +1 more source

Oxygen Diffusion in Li(Nb,Ta)O3 Single Crystals

physica status solidi (a), Volume 222, Issue 1, January 2025.
The self‐diffusion of oxygen in Li(Nb,Ta)O3 single crystals is studied experimentally. The diffusivities decrease with increasing Ta content in the crystals. The activation enthalpy of diffusion of about 3.5 eV is compared with the energy barrier of a single O vacancy determined by nudged elastic band/density‐functional theory calculations.
Claudia Kofahl, Johanna Uhlendorf, Brendan A. Muscutt, Mike N. Pionteck, Simone Sanna, Holger Fritze, Steffen Ganschow, Harald Schmidt   +7 more
wiley   +1 more source

Evolution of the Electrical Conductivity of LiNb1−xTaxO3 Solid Solutions across the Ferroelectric Phase Transformation

physica status solidi (a), Volume 222, Issue 1, January 2025.
The decrease in activation energy of electrical conductivity that occurs in LiNb1‐xTaxO3 solid solutions during the transition from the ferroelectric to the paraelectric phase is investigated. The effect is composition‐dependent and decreases with the Ta content x.
Fatima‐Ezzahrae El Azzouzi, Detlef Klimm, Alexander Kapp, Leonard M. Verhoff, Nils A. Schäfer, Steffen Ganschow, Klaus.‐Dieter Becker, Simone Sanna, Holger Fritze   +8 more
wiley   +1 more source

A High‐Temperature Optical Spectroscopy Study of the Fundamental Absorption Edge in the LiNbO3–LiTaO3 Solid Solution

physica status solidi (a), Volume 222, Issue 1, January 2025.
An optical bandgap study has been conducted on single crystals of the LiNbO3−LiTaO3 solid solution. At room temperature, bandgaps of LiNbO3 and LiTaO3 amount to about 4.0 and 4.6 eV, respectively. With rising temperatures, up to 1200 °C, bandgaps decrease by about 35%; their compositional variation is found far from linear.
Piotr Gaczyński, Yuriy Suhak, Steffen Ganschow, Simone Sanna, Holger Fritze, Klaus‐Dieter Becker   +5 more
wiley   +1 more source

Acoustic Loss in LiNb1−xTaxO3 at Temperatures up to 900 °C

physica status solidi (a), Volume 222, Issue 1, January 2025.
This study delves into the characterization of acoustic losses in LiNb1−xTaxO3 solid solutions at elevated temperatures. By examining different compositions, valuable insights into charge transport phenomena and material constants are uncovered in the study.
Uliana Yakhnevych, Vanik Sargsyan, Fatima El Azzouzi, Alexander Kapp, Felix Bernhardt, Yuriy Suhak, Steffen Ganschow, Harald Schmidt, Simone Sanna, Holger Fritze   +9 more
wiley   +1 more source