Time domain spectroscopy, dielectric properties

The observation of slow, confined water motion in AOT reverse micelles is also supported by measured dielectric relaxation of the water pool. Using terahertz time-domain spectroscopy, the dielectric properties of water in the reverse micelles have been investigated by Mittleman et al. [36]. They found that both the time scale and amplitude of the relaxation was smaller than those of bulk water. They attributed these results to the reduction of long-range collective motion due to the confinement of the water in the nanometer-sized micelles. These results suggested that free water motion in the reverse micelles are not equivalent to bulk solvation dynamics. 

This paper is primarily concerned with the techniques usually described as time domain spectroscopy (TDS) or time domain reflectom-etry (TDR). These have been most commonly applied to studies of time or frequency dependent behavior of dielectrics with negligible ohmic or d.c. conductance, but can be used for substances with appreciable conductance and indeed for studies of any electrical properties which can be characterized by an effective admittance or impedance. 

Y. Polevaya, I. Ermoline, M. Schlesinger, B. Z. Ginzburg, Y. Feldman, Time domain dielectric spectroscopy study of human cells II, Biochim. Biophys. Acta, 1999,1419, pp. 257-271. A. DiBiasio, C. Cametti, Effect of the dielectric properties of biological cell suspensions, Bioelectrochem., 2007, 71,2, pp. 149-156. 

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