Results 91 to 100 of about 11,049,624 (308)

Elastic constants of nematic liquid crystals of uniaxial symmetry

, 2004
We study in detail the influence of molecular interactions on the Frank elastic constants of uniaxial nematic liquid crystals composed of molecules of cylindrical symmetry.
Allen M P, Brook-Levinson E T, Chandrasekhar S, de Jau W H, de Jau W H, Denton A R, Gray C G, Hara M, Kimura H, Kohli M, Madhusudana N V, Madhusudana N V, Mishra P, Nakajima N, Osipov M A, Pines A, Poniewierski A, Priest R G, Ram J, Rott L A, Rowell J C, Singh S, Singh Y, Singh Y, Singh Y, Stecki J, Tsykalo A I, van der Meer B W, Zakhrov A V   +28 more
core   +2 more sources

Counterintuitive Fluorescence Blue Shift in Symmetry Breaking Dicationic Bis(indolium) with Two‐Photon Absorption Properties for NIR Living Cell Imaging

Advanced Materials, EarlyView.
Highly water‐soluble dicationic bis(indolium) dyes have been prepared, showing excellent two‐photon absorption and light emission. Their fluorescence behavior discloses an unusual increasing blue shift with increasing solvent polarity, which, in parallel, is beneficial for enhanced detection in biological media.
Carlos Benitez‐Martin, Jose M. Marin‐Beloqui, Juan T. López Navarrete, Juan Casado, Francisco Najera, Ezequiel Perez‐Inestrosa   +5 more
wiley   +1 more source

Ellipsoidal Coulomb Crystals in a Linear Radiofrequency Trap

, 2004
A static quadrupole potential breaks the cylindrical symmetry of the effective potential of a linear rf trap. For a one-component fluid plasma at low temperature, the resulting equilibrium charge distribution is predicted to be an ellipsoid.
B. Roth, Raizen M. G., S. Schiller, U. Fröhlich   +3 more
core   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Crystal Engineering of Reticular Materials for Gas‐ and Liquid‐Phase Hydrocarbon Separation

Advanced Materials, EarlyView.
Crystal engineering enables systematic study of structure/function relationships as exemplified by pore engineering of reticular sorbents, including porous coordination networks and covalent organic frameworks. This review assesses such studies applied across the full scope of industrially relevant hydrocarbon separations to provide insight into how ...
Xia Li, Soumya Mukherjee, Michael J. Zaworotko   +2 more
wiley   +1 more source

Chaos of Charged Particles in Quadrupole Magnetic Fields Under Schwarzschild Backgrounds

Universe
A four-vector potential of an external test electromagnetic field in a Schwarzschild background is described in terms of a combination of dipole and quadrupole magnetic fields. This combination is an interior solution of the source-free Maxwell equations.
Qihan Zhang, Xin Wu
doaj   +1 more source

High-gradient microelectromechanical system quadrupole electromagnets for particle beam focusing and steering

Physical Review Special Topics. Accelerators and Beams, 2015
Recent advancements in microelectromechanical system (MEMS) fabrication techniques have enabled the batch-fabrication of quadrupole MEMS electromagnets producing 100 mT-scale field across sub-mm gaps with the potential for transformational advances in ...
Jere Harrison, Yongha Hwang, Omeed Paydar, Jimmy Wu, Evan Threlkeld, James Rosenzweig, Pietro Musumeci, Rob Candler   +7 more
doaj   +1 more source

Quadrupole topological phase and robust corner resonance in Kekulé hexagonal electric circuit

New Journal of Physics, 2020
Two-dimensional (2D) quadrupole topological insulators, featured by topologically protected 0D corner modes, have recently attracted tremendous interest in condensed matter and materials physics.
Junjie Yao, Xiamin Hao, Fangxue Luo, Yizhen Jia, Miao Zhou   +4 more
doaj   +1 more source

Nuclear Magnetic Quadrupole Moments in Single Particle Approximation

, 1994
A static magnetic quadrupole moment of a nucleus, induced by T- and P-odd nucleon-nucleon interaction, is investigated in the single-particle approximation. Models are considered allowing for analytical solution.
A. Bohr, B. I. Birbrair, E. M. Purcell, I. B. Khriplovich, I. B. Khriplovich, I. B. Khriplovich, L. I. Schiff, O. P. Sushkov, R. L. Garwin, V. B. Telitsin, V. F. Dmitriev, V. V. Flambaum, V.A. Chepurnov   +12 more
core   +2 more sources

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source