Journal ArticleDOI
Detailed comparison of the Williams–Watts and Cole–Davidson functions
C. P. Lindsey,G. D. Patterson +1 more
TLDR
In this paper, the distribution function of relaxation times underlying the nonexponential relaxation function of Williams and Watts is derived and compared with the analogous Cole-Davidson distribution function, and several useful relations between relaxation and distribution functions are summarized or derived, and the limitations of deriving distribution functions from relaxation functions are discussed.Abstract:
The distribution function of relaxation times underlying the nonexponential relaxation function of Williams and Watts is derived and compared with the analogous Cole–Davidson distribution function. In order to make the comparison between the two distribution functions, a simple empirical relationship between the Cole–Davidson and Williams–Watts parameters was determined which may be used to compare data analyzed using the two fitting functions. Although the relaxation functions are similar to each other, the distribution functions are quite dissimilar. The Cole–Davidson distribution shows a sharp long time cutoff, while the Williams–Watts distribution decays approximately exponentially at long times. Finally, several useful relations between relaxation and distribution functions are summarized or derived, and the limitations of deriving distribution functions from relaxation functions are discussed.read more
Citations
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Journal ArticleDOI
Dielectric dispersion interpretation of single enzyme dynamic disorder, spectral diffusion, and radiative fluorescence lifetime.
TL;DR: A previously derived relation between the observables and the electric field fluctuations is used to calculate the autocorrelation functions of the fluorescence lifetime and of spectral diffusion using dielectric dispersion data for proteins and the Onsager regression hypothesis.
Proceedings ArticleDOI
A new vision of photodarkening in Yb 3+ -doped fibers
TL;DR: In this article, the authors showed that thulium impurities, present at the parts-per-billion (ppb) level in the raw doping material, can induce UV emission which in turn creates defects responsible for photodarkening in ytterbium-doped continuous-wave fiber lasers.
Journal ArticleDOI
Remarkable non-exponentiality of the enthalpy relaxation in fast ion conducting glass (AgI)0.5 (AgPO3)0.5 far from equilibrium☆
TL;DR: In this paper, the spontaneous enthalpy-evolution processes of AgI-based fast ion conducting glass (AgI) 0.5 precooled at different rates were precisely measured by using an adiabatic calorimeter in the temperature range of 290-373 K.
Journal ArticleDOI
Probing Heterogeneity and Bonding at Silica Surfaces through Single-Molecule Investigation of Base-Mediated Linkage Failure
TL;DR: Kinetic analysis elucidates the role of thermal annealing and addition of blocking layers in increasing stability and demonstrates that the innate structural diversity of the silica surface is likely the cause of observed heterogeneity in surface-linkage disruption kinetics.
Journal ArticleDOI
Effect of H bond removal and changes in the position of the iron–sulphur head domain on the spin–lattice relaxation properties of the [2Fe–2S]2+ Rieske cluster in cytochrome bc1
TL;DR: Comparison of electron spin-lattice relaxation studies of the 2Fe-2S iron-sulphur (Fe-S) cluster embedded in a large membrane protein complex - cytochrome bc1 - suggests that H bond removal influences the geometry leading to increased strength of antiferromagnetic coupling between two Fe ions of the cluster.
References
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Kenneth S. Cole,Robert H. Cole +1 more
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Graham Williams,David C. Watts +1 more
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Journal ArticleDOI
Further considerations of non symmetrical dielectric relaxation behaviour arising from a simple empirical decay function
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