Hydrogen bonded (H-bonded) liquids can be considered as mediums that have nanosized heterogeneities. Previously, it was shown that the light scattering by acoustic phonons is accompanied by fluctuations of intensity of light with power spectral density ？？( ) that reflects the phonon energy fluctuations. In this work fluctuations of light scattering in H-bonded liquids have been investigated. We consider two mechanisms of -process forming: fluctuations of phonon energy and fluctuations caused by dynamical inhomogeneities, predicted by percolation model. The variability can be explained by different contributions of both scattering mechanisms, which form an overall picture of low-frequency fluctuations of scattering light intensity in complex liquids. 1. Introduction Slow fluctuations of intensity of scattered light in liquids, observed in several experiments [1–3], indicate the existence of a long-range correlation of molecular vibrations, which creates conditions for the slow evolution and stability of local nanosized structural formations. Power spectral density of these fluctuations is described by the law , where is close to 1. It gives grounds to attribute them to a wide class of phenomena known as “ -fluctuations,” which is distributed in nature and represents an interest for research. It is considered that fluctuations in condensed matter are caused by the existence of specific structural and functional anomalies (nonlinearity, metastable states, faults, traps, and clusters) that have a wide range of lifetimes [4]. A cycle of works [5–8] had been performed by Musha and Borbely. An original two-beam optical scheme was used. It was shown that the light scattering by acoustic phonons is accompanied by fluctuations of intensity and the law reflects the phonon energy fluctuations. Light scattering in the liquid systems (water, electrolyte solutions) occurs on phonons localized at inhomogeneities (clusters). It can be expected that fluctuations of intensity of light represent characteristics of the centers of localization and, therefore, give additional information on nanosized structure of liquid systems. Based on the modified Musha-Borbely scheme, we investigate intensity fluctuations of scattered light in hydrogen-bonded liquids: water, glycerol, and their binary solutions. Water-glycerol solutions are known as heterogeneous systems with complex hierarchical structure and multiple anomalies [9–11]. 2. Methodology and Experimental Measurements As the light waves pass through condensed matter, the secondary radiation can be observed. It is caused by
References
[1]
F. R. Chernikov, “Influence of certain physical factors on the fluctuations of light scatter in water and aqueous solutions of biopolymers,” Biophysics, vol. 35, no. 5, pp. 717–721, 1990.
[2]
V. I. Lobyshev, B. D. Ryzhikov, and R. E. Shikhlinskaya, “Spontaneous and external electromagnetic field-induced long-term transient processes in diluted aqueous tryptophan solutions and water,” Biophysics, vol. 43, no. 4, p. 715, 1998.
[3]
L. Bulavin, A. Yakunov, and M. Bily, “Manifestation of slow fluctuations of water structure in the spectra of Raman light scattering,” Physics of Alive, vol. 13, no. 1, pp. 43–50, 2005.
[4]
M. B. Weissman, “1/f noise and other slow, nonexponential kinetics in condensed matter,” Reviews of Modern Physics, vol. 60, no. 2, pp. 537–571, 1988.
[5]
M. Toshimitsu, B. G？bor, and S. Minoru, “1/f phonon-number fluctuations in quartz observed by laser light scattering,” Physical Review Letters, vol. 64, no. 20, pp. 2394–2397, 1990.
[6]
T. Musha and G. Borbely, “1/f fluctuations of phonon energy in water,” Japanese Journal of Applied Physics B, vol. 31, no. 3, pp. L370–L371, 1992.
[7]
T. Tohei, K. Nakagawa, K. Takada, and T. Musha, “1/f fluctuations in LiCl solution,” Japanese Journal of Applied Physics, vol. 35, no. 3, pp. 1781–1785, 1996.
[8]
G. Borbely, “1/f phonon number fluctuations in pure liquids,” Journal of Communications, vol. 46, no. 2, pp. 32–35, 1995.
[9]
I. I. Adamenko, L. A. Bulavin, V. Ilyin, S. A. Zelinsky, and K. O. Moroz, “Anomalous behavior of glycerol-water solutions,” Journal of Molecular Liquids, vol. 127, no. 1–3, pp. 90–92, 2006.
[10]
A. Puzenko, Y. Hayashi, and Y. Feldman, “Space and time scaling in glycerol-water mixtures,” Journal of Non-Crystalline Solids, vol. 353, no. 47–51, pp. 4518–4522, 2007.
[11]
A. O. Maksymov, A. V. Yakunov, and M. M. Bily, “Investigation of H-bonded media by means of Raman scattering in terms of the fractal formalism,” in Nanophotonic Materials VI, Proceedings of SPIE, San Diego, Calif, USA, August 2009.
[12]
I. L. Fabelinskii, Scattering of Light, Nauka, Moskow, Russia, 1965.
[13]
T. Still, High Frequency Acoustics in Colloid-Based Meso- and Nanostructures by Spontaneous Brillouin Light Scattering, Springer, Berlin, Germany, 2010.
[14]
V. F. Kovalenko, P. G. Levchenko, S. V. Shutov, and A. Y. Bordiuk, “Investigation of the nature of light scattering by water,” Ukrainian Journal of Physical Optics, vol. 10, no. 1, pp. 38–53, 2009.
[15]
M. Sedlák, “Large-scale supramolecular structure in solutions of low molar mass compounds and mixtures of liquids. I. Light scattering characterization,” Journal of Physical Chemistry B, vol. 110, no. 9, pp. 4329–4338, 2006.
[16]
K. Fakamachi, “1/f fluctuations in FPU lattices,” Europhysics Letters, vol. 26, no. 6, article 449, 1994.
[17]
T. DeSimone, S. Demoulini, and R. M. Stratt, “A theory of percolation in liquids,” The Journal of Chemical Physics, vol. 85, no. 1, pp. 391–400, 1986.
[18]
L. B. Kier and C.-K. Cheng, “A cellular automata model of water,” Journal of Chemical Information and Computer Sciences, vol. 34, no. 3, pp. 647–652, 1994.
[19]
A. Yakunov and P. Yakunov, “Slow dynamics of water structure in cellular automata model,” in Proceedings of the International Conference on Physics of Liquid Matter: Modern Problems (PLMP '05), p. 140, Kyiv, Ukraine, May 2005.
[20]
E. Gray, American Institute of Physics Handbook, McGraw-Hill Book Company, New York, NY, USA, 1972.
