Results 41 to 50 of about 159,516 (298)

Photoluminescence dispersion as a probe of structural inhomogeneity in silica

, 2008
We report time-resolved photoluminescence spectra of point defects in amorphous silicon dioxide (silica), in particular the decay kinetics of the emission signals of extrinsic Oxygen Deficient Centres of the second type from singlet and directly-excited ...
Caulfield K J, Fabrizio Messina, Marco Cannas, Maurizio Leone, Michele D’Amico, Moerner W E, Nalwa H S, Pacchioni G, Roberto Boscaino, Stoneham A M   +9 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Atmospheric air-phase singlet oxygen generator for practical multifunctional applications

Научно-технический вестник информационных технологий, механики и оптики
Singlet oxygen is a metastable reactive oxygen species involved in numerous biochemical reactions and physiological processes. This suggests its potential applicability in addressing practical challenges in medicine and human safety. Due to its oxidative
L. L. Khomutinnikova, E. P. Bykov, S. A. Plyastsov, S. K. Evstropiev, I. K. Meshkovskii, S. G. Zhuravskii, V. N. Baushev   +6 more
doaj   +1 more source

Characterization of singlet oxygen-accumulating mutants isolated in a screen for altered oxidative stress response in Chlamydomonas reinhardtii

BMC Plant Biology, 2010
Background When photosynthetic organisms are exposed to harsh environmental conditions such as high light intensities or cold stress, the production of reactive oxygen species like singlet oxygen is stimulated in the chloroplast.
Eggen Rik IL, Fischer Beat B, Niyogi Krishna K   +2 more
doaj   +1 more source

Extension of the composite CBS-QB3 method to singlet diradical calculations

, 2007
The composite CBS-QB3 method is widely used to obtain accurate energies of molecules and radicals although its use in the case of singlet diradicals gives rise to some difficulties.
Baptiste Sirjean, Becke, Coote, Cramer, Cramer, Frisch, Gräfenstein, Gräfenstein, Herbinet, Lee, Luo, Manuel F. Ruiz-López, Montgomery, Montgomery, Pedersen, Pierre-Alexandre Glaude, Pittam, Prosen, René Fournet, Schreiner, Sirjean, Tsang, Wijaya, Wood, Ziegler   +24 more
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Dzyaloshinsky-Moriya antisymmetric exchange coupling in cuprates: Oxygen effects [PDF]

, 2006
We revisit a problem of Dzyaloshinsky-Moriya antisymmetric exchange coupling for a single bond in cuprates specifying the local spin-orbital contributions to Dzyaloshinsky vector focusing on the oxygen term.
A. S. Borovik-Romanov, A. S. Moskvin, A. S. Moskvin, A. S. Moskvin, A. S. Moskvin, F. Keffer, G. Herzberg, H. Eskes, I. E. Dzialoshinskii, K. Yosida, L. Shekhtman, L. Shekhtman, M. D. Lumsden, M. Oshikawa, M. Oshikawa, P. W. Anderson, R. E. Walstedt, S. Renold, T. Moriya, T. Thio, T. Yildirim, V. Y. Yushankhai, W. Koshibae, W. Koshibae, W. Low   +24 more
core   +3 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Evidence for the Formation of Ozone (or Ozone-Like Oxidants) by the Reaction of Singlet Oxygen with Amino Acids

Journal of Chemistry, 2018
Antibodies or some amino acids, namely, cysteine, methionine, histidine, and tryptophan, were previously reported to catalyse the conversion of singlet oxygen (1O2) to ozone (O3).
George W. Wanjala, Arnold N. Onyango, David Abuga, Calvin Onyango, Moses Makayoto   +4 more
doaj   +1 more source

Immobilized photosensitizers for antimicrobial applications [PDF]

, 2015
Photodynamic antimicrobial chemotherapy (PACT) is a very promising alternative to conventional antibiotics for the efficient inactivation of pathogenic microorganisms; this is due to the fact that it is virtually impossible for resistant strains to ...
Boyle, Ross W., Spagnul, Cinzia, Turner, Lauren C.   +2 more
core   +1 more source