Results 81 to 90 of about 1,341,566 (283)

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, EarlyView.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

Bose-Einstein Condensation and Spontaneous Symmetry Breaking

, 2007
After recalling briefly the connection between spontaneous symmetry breaking and off-diagonal long range order for models of magnets a general proof of spontaneous breaking of gauge symmetry as a consequence of Bose-Einstein Condensation is presented ...
Berezin, Berezin, Bogoliubov, Dyson, Elliott H. Lieb, Fannes, Ginibre, Griffiths, Jakob Yngvason, Klauder, Lieb, Lieb, Lieb, Lieb, Lieb, Pulé, Robert Seiringer, Roepstorff, Simon, Sütő, Zagrebnov   +20 more
core   +3 more sources

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source

Spontaneous creation of Kibble-Zurek solitons in a Bose-Einstein condensate

, 2013
When a system crosses a second-order phase transition on a finite timescale, spontaneous symmetry breaking can cause the development of domains with independent order parameters, which then grow and approach each other creating boundary defects.
A Del Campo, A Del Campo, B Damski, BP Anderson, C Becker, C Bäuerle, CN Weiler, D Chen, DE Pritchard, E Witkowska, F Dalfovo, Franco Dalfovo, G Lamporesi, Gabriele Ferrari, Giacomo Lamporesi, H Hu, I Shomroni, J Denschlag, J Dziarmaga, J Dziarmaga, J Sabbatini, JJ Chang, K Pyka, LD Carr, R Carmi, R Carmi, R Monaco, R Monaco, R Monaco, S Burger, S Ejtemaee, S Ulm, S-W Su, Simone Donadello, Simone Serafini, T Donner, T Kibble, T Yefsah, TWB Kibble, VMH Ruutu, W Ketterle, W Zurek, WH Zurek, WH Zurek, WH Zurek   +44 more
core   +1 more source

Highly Sensitive Electrochemical Biosensor Based on Hairy Particles with Controllable High Enzyme Loading and Activity

Advanced Functional Materials, EarlyView.
For the first time, a highly sensitive electrochemical biosensor based on SiO2‐based hairy particles with a grafted PDMAEMA polymer brush containing a quantifiable and large amount of immobilized Laccase is reported. The fabricated biosensor exhibits a sensitivity of 0.14 A·m⁻¹, a limit of detection (LOD) of 0.1 µm, and a detection range of 0.3–750 µm,
Pavel Milkin, Anila Antony, Hongtao Cai, Antonia Debevc, Ceyda Topal, Anne Linhardt, Alla Synytska, Leonid Ionov   +7 more
wiley   +1 more source

Spontaneous tumor regression

Journal of Oncological Sciences, 2016
Spontaneous tumor regression is defined as spontaneous remission or disappearance of a tumor in the absence of any treatment. Activation of immune system has been found important in its pathogenesis.
Tarik Salman
doaj   +1 more source

Photoluminescence modification by high-order photonic band with abnormal dispersion in ZnO inverse opal

, 2008
We measured the angle- and polarization-resolved reflection and photoluminescence spectra of ZnO inverse opals. Significant enhancement of spontaneous emission is observed.
C. López, Heeso Noh, Hui Cao, J. Lim, Mark A. Anderson, Michael Scharrer, Robert P. H. Chang   +6 more
core   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

Versatile Dye Laser Generator-Amplifier System for Intense Tunable Picosecond Pulse Generation [PDF]

, 1986
. Passively mode-locked ruby-laser pulses are used to generate nearly diffraction-limited picosecond light pulses in a dye cell by longitudinally amplified spontaneous emission.
Penzkofer, Alfons, Sperber, P., Weidner, M.   +2 more
core  

Interference of Spontaneous Emission of Light from two Solid-State Atomic Ensembles

, 2007
We report an interference experiment of spontaneous emission of light from two distant solid-state ensembles of atoms that are coherently excited by a short laser pulse. The ensembles are Erbium ions doped into two LiNbO3 crystals with channel waveguides,
C Simon, Cohen-Tannoudji C, H de Riedmatten, H Suche, M Afzelius, M U Staudt, Mandel L, N Gisin, R Ricken, S R Hastings-Simon, Scully M O, Sun Y C, W Sohler   +12 more
core   +2 more sources