954 research outputs found
Factors affecting trust and communication in global virtual teams
No full textAuthor Georgios GousiasMasterarbeit Universität Linz 2022Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Factors affecting trust and communication in global virtual teams
No full textAuthor Georgios GousiasMasterarbeit Universität Linz 2022Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Functional graphene-based materials tuning the electronic structure by means of charge transfer = Funktionelle graphene-basierende Materialien : Anpassung der elektronischen Struktur durch Ladungstransfer
No full textDer griechische Gelehrte Georgios Zachariadis und sein Beitrag zum slawischen Schrifttum im 19. Jahrhundert
Get PDFAmong the Greek scholars who lived during the 19th century in the north-eastern Balkans, and also in Central Europe, and by their work contributed to the spiritual development of the Balkan Slavs, pride of place must be given to Georgios Zachariadis. Unfortunately, however, no detailed monograph on Zachariadis exists. On this account the problems that arise concerning the life and activities of this Greek scholar are still many and varied. In his study the author tries to fill one part of this lacuna. At the beginning of the work the following are examined, on the basis of new historical evidence: the date and place of Georgios Zachariadis’ birth, his studies and tenure as teacher in the Greek school at Zemun, the Serbian school at Šabac, and the Greek school in Vienna. The author continues his study by analyzing the various works of Zachariadis, which are written on Old Church^Slavonic, and the translations this Greek scholar made from Greek into Old Church Slavonic. Finally, the extent of Georgios Zachariadis’ contribution to Slavonic letters is made clear
The political program of Hellenism in Turkey
No full textTitle: Tό πoλιτικόν πρόγραμμα τοῦ Έλληνισμοῦ έν Tουρκία (The political program of Hellenism in Turkey) Originally published: as a leaflet in Istanbul, 1912 Language: GreekThe excerpts used are from the original which can be found at the ‘Ion Dragoumis archive’ in the Gennadion Library in Athens, pp. 7–9, 11–13, 24–25. About the author Georgios Boussios [1876, Grevena (Ottoman Macedonia) – 1929, Athens]: activist, politician and journalist. He was born into a well-off family of merchants. He c..
Correction: Do chemistry and rheology follow the same laboratory ageing trends in bitumen?
No full text Correction to: Materials and Structures (2022) 55:146 https://doi.org/10.1617/s11527-022-01986-w The article “Do chemistry and rheology follow the same laboratory ageing trends in bitumen?”, written by Georgios Pipintakos, Caitlin Lommaert, Aikaterini Varveri and Wim Van den bergh, was originally published in volume 55, issue 5, ID 146 without open access. With the society's decision to grant Open Choice the copyright of the article changed in February 2023 to © The Author(s) 2022 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0. Open access funding enabled and organized by RILEM.Pavement Engineerin
Heterobinuclear Light Absorber Coupled to Molecular Wire for Charge Transport across Ultrathin Silica Membrane for Artificial Photosynthesis
Get PDFCoupling of robust, all-inorganic
heterobinuclear light absorbers
to metal oxide catalysts for water oxidation across an ultrathin product-separating
silica membrane requires charge transfer through organic molecular
wires embedded in the silica. A synthetic approach for assembling
the bimetallic units on the silica surface is introduced that is compatible
with the presence of encapsulated organic molecules. Accurate selection
and fine tuning of the concentration of embedded conducting wires
are enabled by a two-step method consisting of surface attachment
of a tripodal anchor, trimethoxysilyl aniline, followed by attachment
of p-oligo(phenylene vinylene) through amide linkage.
Each step of the assembly process was monitored and characterized
by a combination of Fourier transform infrared, Fourier transform-Raman,
and UV–vis spectroscopy techniques. Hole transfer was observed
from transient CoIII, formed by TiIVOCoII → TiIIIOCoIII charge transfer
excitation of the chromophore, to p-oligo(phenylene
vinylene) molecule within the 8 ns width of the photolysis laser pulse
by transient optical absorption spectroscopy of the wire radical cation.
The rectifying property of the light absorber–wire assembly
enabled by appropriate selection of redox potentials of metals and
embedded wire obviates the need for a molecularly defined linkage
between the components. Combined with the previously observed ultrafast
hole injection from the embedded wires to Co oxide catalyst, the result
implies visible-light-induced hole transfer from visible-light-excited
binuclear light absorber to water oxidation catalyst across the silica
separation membrane in a few nanoseconds or faster. Demonstration
and understanding of this interfacial charge-transfer step is critical
for developing nanoscale core–shell architectures for complete
photosynthetic cycles
Ultrathin oxide layers for nanoscale integration of molecular light absorbers, catalysts, and complete artificial photosystems
No full textUltrathin oxide layers for nanoscale integration of molecular light absorbers, catalysts, and complete artificial photosystems
Get PDFArtificial photosynthesis is an attractive approach for the generation of renewable fuels because such systems will be suitable for deployment on highly abundant, non-arable land. Recently emerged methods of nanoscience to create conformal, ultrathin oxide layers enable the hierarchical integration of light absorbers, catalysts, and membranes into systems with far simpler synthetic approaches than available till now. This holds in particular for the coupling of molecular light absorbers and catalysts for sunlight to fuel conversion, providing photoelectrodes with greatly improved stability. Moreover, the use of ultrathin inert oxides as proton conducting, molecule impermeable membranes has opened up the integration of reduction and oxidation half reactions into complete photosynthetic systems on the shortest possible length scale-the nanometer scale. This capability affords minimization of energy-degrading resistance losses caused by ion transport over macroscale distances while separating the incompatible water oxidation and carbon dioxide reduction catalysis environments on the nanoscale. Understanding of charge transport between molecular components embedded in the oxide layers is critical for guiding synthetic design improvements of the light absorber-catalyst units to optimize performance and integrate them into complete artificial photosystems. Recent results and insights from transient optical, vibrational, and photoelectrochemical studies are presented, and future challenges and opportunities for engaging dynamic spectroscopies to accelerate the development of nanoscale integrated artificial photosystems are discussed
Heterobinuclear Light Absorber Coupled to Molecular Wire for Charge Transport across Ultrathin Silica Membrane for Artificial Photosynthesis
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