Results 121 to 130 of about 12,038,824 (373)

Relaxation of convex functionals: the gap problem

Annales de l'Institut Henri Poincaré C, Analyse non linéaire, 2003
It is shown that the relaxed energy \mathcal{F}\left(u,A\right): = \inf \Big\{ \lim\!\! \inf_{n\rightarrow + \infty }\!\int \limits_{A}\! f(x,\nabla u_{n})dx:\{u_{n}\} \subset W_{\text{loc}}^{1,\beta }(A;\mathbb{R}^{d}),\, u_{n}\!\rightarrow\! u \text{ in }L^{1}(A;\mathbb{R}^{d}) \Big\},
ACERBI, Emilio Daniele Giovanni, BOUCHITTE G., FONSECA I.   +2 more
openaire   +3 more sources

Uncertainty estimates for magnetic relaxation times and magnetic relaxation parameters.

Physical Chemistry, Chemical Physics - PCCP, 2019
The use of alternating current (AC) magnetometry to measure magnetic relaxation times is one of the most fundamental measurements for characterising single-molecule magnets (SMMs). These measurements, performed as a function of frequency, temperature and
D. Reta, N. Chilton
semanticscholar   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

Investigation of correlation between dielectric parameters and nanostructures in aqueous solution grown poly(vinyl alcohol)-montmorillonite clay nanocomposites by dielectric relaxation spectroscopy

eXPRESS Polymer Letters, 2010
Poly(vinyl alcohol) (PVA)-montmorillonite (MMT) clay nanocomposite films up to 10 wt% clay concentration were synthesized by aqueous solution grown technique. The relative complex dielectric function, alternating current electrical conductivity, electric
doaj   +1 more source

Reorientation dynamics in thin glassy films

, 2004
We present a study of orientational relaxation dynamics in thin films of a low-molecular-weight glass-former as a function of temperature and film thickness. The relaxation is probed by second-harmonic generation after release of a poling electric field.
Cecchetto, Elio, Jerome, Blandine, Moroni, Daniele   +2 more
core   +2 more sources

Low-Field Combined Diffusion-Relaxation MRI for Mapping Placenta Structure and Function [PDF]

, 2023
Paddy J. Slator, Jordina Aviles Verdera, Raphaël Tomi‐Tricot, Joseph V. Hajnal, Daniel C. Alexander, Jana Hutter   +5 more
openalex   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

Advanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu, Mersad Mostaghimi, Abhinav Chandresh, Saibal Jana, Wolfgang Wenzel, Lars Heinke   +5 more
wiley   +1 more source

Ferrocene Derivatives Enable Ultrasensitive Perovskite Photodetectors with Enhanced Reverse Bias Stability

Advanced Functional Materials, EarlyView.
Novel ferrocene derivatives (e.g., FcPhc2) are used as an ultrathin layer hole‐blocking layer, reducing hole injection from the Ag contact. This results in an ultralow noise spectral density of 1.2 × 10−14 A Hz−1/2, and a high specific detectivity of 8.1 × 1012 Jones at −0.5 V.
Eunyoung Hong, William D. J. Tremlett, Lucy Hart, Beier Hu, Zhuoran Qiao, Patipan Sukpoonprom, Sarah Fearn, Edoardo Angela, Matilde Brunetta, Demosthenes C. Koutsogeorgis, Nikolaos Kalfagiannis, Davide Nodari, Martyn A. McLachlan, Piers R. F. Barnes, Artem A. Bakulin, Nicholas J. Long, Nicola Gasparini   +16 more
wiley   +1 more source

Energy decay in a Timoshenko-type system for thermoelasticity of type III with distributed delay and past history

Electronic Journal of Differential Equations, 2018
In this work, we consider a one-dimensional Timoshenko system of thermoelasticity of type III with past history and distributive delay. It is known that an arbitrarily small delay may be the source of instability.
Jianghao Hao, Fei Wang
doaj  

Anisotropic spin splitting and spin relaxation in asymmetric zinc-blende semiconductor quantum structures

, 2003
Spin relaxation due to the D'yakonov-Perel' mechanism is intimately related with the spin splitting of the electronic states. We determine the spin relaxation rates from anisotropic spin splittings of electron subbands in n-(001) zinc-blende ...
Kainz, J., Roessler, U., Winkler, R.
core   +1 more source