Outdoor‐Indoor Channel

Glazunov, Andrés Alayón; Lai, Zhihua; Zhang, Jie

doi:10.1002/9781118410998.ch5

Cited by 1 publication

(1 citation statement)

References 16 publications

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“…For the temperature jump experiments, we assume a bivariate normal distribution of activation barriers for the “forward reactions”, , that is proportional to where is the correlation of Δ G f,1 i and Δ G f,2 i for each individual configuration, i , with a total of n = 1000 configurations randomly sampled. In the limit of perfect correlation (i.e., ρ = 1), the bivariate normal distribution reduces to a univariate distribution constrained to the diagonal of the marginal distribution functions by Dirac’s δ-function . The RDW model has just four adjustable parameters for the temperature jump experiments, Δ G f,1 , σ 1 , Δ G f,2 , and σ 2 , which describe the means and standard deviations of the binormal distribution for T 1 and T 2 .…”

Section: Experimental Methodsmentioning

confidence: 99%

Dynamic Heterogeneity and Kovacs’ Memory Effects in Supercooled Water

Kringle

Kay

2023

J. Phys. Chem. B

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Understanding the properties of supercooled water is important for developing a comprehensive theory for liquid water and amorphous ices. Because of rapid crystallization for deeply supercooled water, experiments on it are typically carried out under conditions in which the temperature and/or pressure are rapidly changing. As a result, information on the structural relaxation kinetics of supercooled water as it approaches (metastable) equilibrium is useful for interpreting results obtained in this experimentally challenging region of phase space. We used infrared spectroscopy and the fast time resolution obtained by transiently heating nanoscale water films to investigate relaxation kinetics (aging) in supercooled water. When the structural relaxation of the water films was followed using a temperature jump protocol analogous to the classic experiments of Kovacs, similar memory effects were observed. In particular, after suitable aging at one temperature, water’s structure displayed an extremum versus the number of heat pulses upon changing to a second temperature before eventually relaxing to a steady-state structure characteristic of that temperature. A random double well model based on the idea of dynamic heterogeneity in supercooled water accounts for the observations.

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